US20100084121A1 - Plate - Google Patents

Plate Download PDF

Info

Publication number
US20100084121A1
US20100084121A1 US12/519,069 US51906907A US2010084121A1 US 20100084121 A1 US20100084121 A1 US 20100084121A1 US 51906907 A US51906907 A US 51906907A US 2010084121 A1 US2010084121 A1 US 2010084121A1
Authority
US
United States
Prior art keywords
alloy
plate
weight
content
value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/519,069
Other languages
English (en)
Inventor
Ulf Kivisäkk
Kenneth Göransson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lignum Technologies AG
Sandvik Intellectual Property AB
Original Assignee
Sandvik Intellectual Property AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sandvik Intellectual Property AB filed Critical Sandvik Intellectual Property AB
Assigned to KRONOPLUS TECHNICAL AG reassignment KRONOPLUS TECHNICAL AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HANITZSCH, UDO, SCHAFER, HANS, DOHRING, DIETER
Assigned to SANDVIK INTELLECTUAL PROPERTY AB reassignment SANDVIK INTELLECTUAL PROPERTY AB ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GORANSSON, KENNETH, KIVISAKK, ULF
Publication of US20100084121A1 publication Critical patent/US20100084121A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys

Definitions

  • the present invention relates to a plate of a plate heat exchanger, said plate comprising a material which constitutes a part of said plate with a surface made of this material positioned to be in direct contact with a chloride-containing cooling liquid, such as sea water, and a plate heat exchanger adapted to utilize a chloride-containing liquid, such as sea water, as cooling medium.
  • a chloride-containing cooling liquid such as sea water
  • a plate heat exchanger adapted to utilize a chloride-containing liquid, such as sea water, as cooling medium.
  • crevice corrosion phenomena constitutes the main problem in plate heat exchangers utilizing sea water as cooling liquid, since it may not be avoided that connecting interfaces between adjacent plates of the heat exchanger are located so that the sea water will reach the crevices or joint thus formed between adjacent plates, and they have also to be located where the cooling liquid has a comparatively high temperature, which is also critical (see below).
  • This problem is much smaller for tube heat exchangers, where such crevices or joints are less severe and may be located where the risk of crevice corrosion is much lower.
  • the problems of crevice corrosion in plate heat exchangers may be reduced by welding the plates to each other and connect them to each other by sealings, but the problem will by that not disappear. Appended FIG.
  • FIG. 1 schematically shows a plate heat exchanger PHE of this type having a number of plates P joined to each other in a stack for the flow of a cooling medium in the form of sea water SW in channels formed in every second gap between adjacent plates P 1 , P 2 and a medium to be cooled in adjacent channels in every second gap between such plates.
  • the crevice or joint sensitive to crevice corrosion is indicated at C.
  • Crevice corrosion destroying the material is temperature dependent, and when the material for a given cooling liquid, in this case sea water, has a temperature below a critical crevice temperature (CCT) substantially nothing will happen, but when the temperature of the material is raised above this temperature the corrosion of the material at said crevice will be very strong and in a short time destroy the connection, so that temperatures above said critical crevice temperature may not be accepted.
  • This crevice corrosion temperature should in a plate heat exchanger using a chloride-containing cooling liquid, such as sea water, as cooling medium be at least 50° C., preferably at least 60°, for providing an acceptable cooling capacity of the heat exchanger. Sea water used in plate heat exchangers may be chlorinated for the purpose of killing micro organisms.
  • chloride-containing cooling liquid such as sea water
  • cooling medium for use at higher temperatures have for that sake so far almost exclusively been provided with plates made of titanium, which has a critical crevice temperature above 80° C. in sea water.
  • titanium is a very expensive material and it is also not easy available, so that it may sometimes be impossible to avoid waiting times for deliveries thereof in the order of a year or more irrespectively of the financial resources of the buyer.
  • the object of the present invention is to provide a plate of a plate heat exchanger being less costly and easier available than such plates of titanium while still having sufficiently high corrosion resistance for making it attractive to be used in a plate heat exchanger using a chloride-containing cooling liquid, such as sea water, as cooling medium.
  • a chloride-containing cooling liquid such as sea water
  • This object is according to the invention obtained by providing such a plate in which said plate material is a duplex stainless steel alloy containing in weight %: C max 0.06%, Si max 1.5%, Mn 0-3.0%, Cr 23.0-32.0%, Ni 4.9-10.0%, Mo 3.0-8.0%, N 0.15-0.5%, B 0.-0.010%, S max 0.030%, Co 0-3.5%, W 0-3.0%, Cu 0-2.0%, Ru 0-0.3%, Al 0-0.2%, Ca 0-0.010% balance Fe and normal occurring impurities, wherein the ferrite content is 35-70 volume-%.
  • said plate material is a duplex stainless steel alloy containing in weight %: C max 0.06%, Si max 1.5%, Mn 0-3.0%, Cr 23.0-32.0%, Ni 4.9-10.0%, Mo 3.0-8.0%, N 0.15-0.5%, B 0.-0.010%, S max 0.030%, Co 0-3.5%, W 0-3.0%, Cu 0-2.0%, Ru 0-0.
  • impurities from the manufacturing process are Al and Mg.
  • the content of impurities are preferably kept at such a level that the properties of the produced material is substantially unaffected thereof.
  • the inventors have realized that for materials used for plate heat exchanger using a chloride-containing cooling liquid as cooling medium the critical crevice temperature is the main issue and that the composition of the material may be determined with the aim to raise this temperature to a level acceptable for a plate heat exchanger without spending any particular efforts on other resistance properties of the material. It has been found that duplex stainless steel alloys with a composition within these ranges has a critical crevice temperature in sea water well exceeding 50° C. and in fact exceeding 60° C. Thus, it has been found that not the PRE-value, also containing a factor of 16% N, decides the crevice corrosion behaviour of the duplex stainless steel alloy, but it is the content of Cr and Mo, that is the determining factor for the critical crevice temperature of the material.
  • said average Eq1-value of the two phases of the alloy is higher than 41, preferably higher than 42. It has been found that such high levels of the Eq1-value are influencing the critical crevice temperature of the material in chloride-containing environment towards higher levels.
  • the Eq1-value for both the ferrite and the austenite phase is higher than 35, preferably higher than 36, which in combination with an average Eq1-value exceeding 40.5 is preferred for keeping the critical crevice temperature of the material at a required high level.
  • Mo and Cr will primarily choose the ferrite phase, so that the Eq1-value of the austenite phase may be close to 35, although said average Eq1-value is above 40.5.
  • the content of Mo is 4.5-6.5 weight-%. It has turned out that for a given value of Eq1 it is preferred to have a content of Mo being high, namely within this range, since the content of Mo has turned out to be the most important factor for the critical crevice temperature of the material. For obtaining a given Eq1-value it is also preferred to increase the content of Mo rather than that of Cr, even though an increased content of Cr increases the workability of the material when producing the plate, but it increases at the same time the risk of formation of CrN. According to another embodiment of the invention the content of Mo is 4.5-5.5 weight-%.
  • the content of Cr is 23.0-30.0 weight-%. It has been found that a content of Cr within this range is suitable for obtaining a crevice corrosion behaviour of the alloy in a chloride-containing environment aimed at.
  • the content of Al is 0-0.1 weight-%.
  • the invention also relates to a plate heat exchanger adapted to utilize the chloride-containing liquid, such as sea water, as cooling medium, which is characterized in that it is made of plates according to the invention.
  • the advantageous features and advantages of such a plate heat exchanger appear clearly from the above discussion of the plate according to the invention.
  • the invention also relates to use of a plate heat exchanger according to the invention for cooling a medium to be cooled by a chloride-containing cooling liquid, such as sea water, and such a use in which the temperature of said cooling liquid is allowed to reach a temperature of at least 50° C., preferably at least 60° C.
  • the medium to be cooled by the heat exchanger may be of any type, and it may be a gas or gas mixture, such as air, just as well as for example a liquid.
  • FIG. 1 is a very simplified view showing the general structure of a plate heat exchanger with a portion thereof enlarged for explaining the problems to be solved by the present invention
  • FIG. 2 is a graph of critical crevice temperatures versus PRENW-value for alloys according to the invention and reference alloys,
  • FIG. 3 is a graph of critical crevice temperatures versus Eq1-value for alloys according to the invention and reference alloys,
  • FIG. 4 is a simplified view illustrating how a material test has been carried out for alloys according to the invention and reference alloys, and
  • FIG. 5 is a graph corresponding to the graph of FIG. 3 based on another testing method.
  • a high critical crevice temperature in chloride-containing environment is obtained by the combination of elements in a duplex stainless steel alloy according to the invention.
  • the alloy according to the invention contains (in weight-%):
  • Carbon (C) has limited solubility in both ferrite and austenite.
  • the limited solubility implies a risk of precipitation of chromium carbides and the content should therefore not exceed 0.06 weight-%, preferably not exceed 0.02 weight-%.
  • Si Silicon (Si) is utilized as desoxidation agent in the steel production and it increases the flowability during production and welding. However, too high contents of Si lead to precipitation of unwanted intermetallic phase, and the content thereof is limited to 1.5 weight-%.
  • Manganese (Mn) is added in order to increase the N-solubility in the material.
  • Mn only has a limited influence on the N-solubility in the type of alloy in question. Instead there are found other elements with higher influence on the solubility.
  • Mn in combination with high contents of sulfur can give rise to formation of manganese sulfides, which act as initiation-points for pitting corrosion.
  • the content of Mn should therefore be limited to between 0-3.0 weight-%.
  • S Sulfur influences the corrosion resistance negatively by forming soluble sulfides. Furthermore, the hotworkability deteriorates, for what reason the content of sulfur is limited to max 0.030 weight-%, preferably max 0.010 weight-%.
  • Chromium (Cr) is an active element in order to improve the crevice corrosion resistance. Furthermore, a high content of chromium implies that one gets a very good N-solubility in the material. Thus, it is desirable to keep the Cr-content as high as possible in order to improve the corrosion resistance. For good crevice corrosion resistance the content of chromium should be at least 23 weight-%. However, high contents of Cr increase the risk for intermetallic precipitations and the formation of CrN, for what reason the content of chromium should not exceed 32 weight-%, preferably not 30 weight-%.
  • Nickel is used as austenite stabilizing element and is added in suitable contents in order to obtain the desired content of ferrite. In order to obtain the desired relationship between the austenitic and the ferritic phase with between 40-65 volume-% ferrite, an addition of 4.9-10.0 weight-% nickel is required.
  • Molybdenum (Mo) is an active element which improves the crevice corrosion resistance in chloride environments.
  • the Mo-content in the present invention should lie in the range of 0-8.0 weight-%, preferably above 4.5 weight-%.
  • the content of Mo in combination with the content of Cr is the determining factors for obtaining a high critical crevice temperature of the alloy.
  • Tungsten increases mainly the resistance to pitting corrosion. But the addition of too high contents of tungsten in combination with that the Cr-contents as well as Mo-contents are high, means that the risk for intermetallic precipitations increases.
  • the W-content in the present invention should lie in the range of 0-3.0 weight-%.
  • Copper (Cu) may be added in order to improve the general corrosion resistance in acid environments such as sulfuric acid. At the same time Cu influences the structural stability. However, thigh contents of Cu imply that the solid solubility will be exceeded. Therefore the Cu-content should be limited to max 2.0 weight-%.
  • Co Co has properties that are intermediate between those of iron and nickel. Therefore, a minor replacement of these elements with Co, or the use of Co-containing raw materials (Ni scrap metal usually contains some Co, in some cases in quantities greater than 10%) will not result in any major change in properties.
  • Co can be used to replace some Ni as an austenite-stabilizing element.
  • Co is a relatively expensive element, so the addition of Co is limited to be within the range of 0-3.5 weight-%.
  • Al Aluminium (Al) and Calcium (Ca) are used as desoxidation agents at the steel production.
  • the content of Al should be limited to max 0.2 weight-%, preferably max 0.1 weight-%, in order to limit the forming of nitrides.
  • Ca has a favourable effect on the hotductility.
  • the Ca-content should be limited to max 0.010 weight-% in order to avoid an unwanted amount of slag.
  • Boron (B) may be added in order to increase the hotworkability of the material. At a too high content of Boron the weldability as well as the corrosion resistance could deteriorate. Therefore, the content of boron should be limited to max 0.010 weight-%.
  • N Nitrogen
  • N is a very active element, which increases the corrosion resistance, the structural stability as well as the strength of the material. Furthermore, a high N-content improves the recovering of the austenite after welding, which gives good properties within the welded joint. In order to obtain a good effect of N, at least 0.15 weight-% N should be added. At high contents of N the risk for precipitation of chromium nitrides increases, especially when simultaneously the chromium content is high. Furthermore, a high N-content implies that the risk for porosity increases because of the exceeded solubility of N in the smelt. For these reasons the N-content should be limited to max 0.50 weight-%.
  • the content of ferrite is important in order to obtain good mechanical properties and corrosion properties as well as good weldability. From a corrosion point of view and a point of view of weldability a content of ferrite between 35-70% is desirable in order to obtain good properties.
  • Table 1 below shows the composition of alloys 1-25 according to the invention and reference alloys being not according to the invention as well as results of a testing, Testing 1.
  • the crevice corrosion resistance of 25 alloys according to the invention and 7 reference alloys was tested according to MTI-2.
  • the critical crevice temperature (CCT) was determined for all the 32 alloys for two different samples.
  • the average value of CCT for each alloy is indicated in Table 1.
  • All the alloys were produced by melting, hot working and annealing followed by water quenching.
  • FIG. 2 shows the relationship between PRENW and CCT and FIG. 3 the relationship between Eq1 and CCT for Testing 1.
  • FIG. 2 shows that the CCT is for all the alloys according to the invention above 60° C., whereas it is not above 50° C. for any of the reference alloys in spite of high PRENW-values thereof. It is shown that the PRENW-value as long as it is in a region above 46 has no real influence upon the critical crevice temperature of the alloy.
  • FIG. 3 shows that Eq1 should be higher than 40.5 for obtaining a CCT above 60° C.
  • the test was carried out for four different constant potentials: 0, +200, +400 and +700 mV SCE .
  • the start temperature was 20° C., and the temperature increased during the experiment 1° C. per minute.
  • the CCT for each sample has been defined as the temperature resulting in a corrosion current density of at least 0.1 mA/cm 2 in 60 seconds.
  • CCT was determined for 4-6 samples per material and potential. Table 2 below shows the compositions and the results in the form of min values of CCT for all potentials over 0 mV versus SCE. The variations in CCT between different potentials were small. In most cases no crevice corrosion was noted at 0 mV.
  • FIG. 5 shows the relation between Eq1 and CCT according to this modified ASTM G-150. Some of the alloys are present both in Testing 1 and Testing 2. The two different testing methods give somewhat different values of CCT, which is considered to be normal as a consequence of the differences of the methods.
  • This Testing 2 measures primarily the tendency to initiate crevice corrosion, while the Testing 1 primarily measures the tendency to propagation of crevice corrosion. This means that the CCT-values will in the Testing 2 be somewhat higher than in the testing 1. This is the reason while the lowest CCT-value allowed for use in a plate heat exchanger according to the Testing 2 should be set to 80° C.
  • This testing was an electrochemical testing with constant potential and temperature in 24 hours.
  • the same type of crevice former and the same crevice pressure as in the Testing 2 were used. New samples were used for each temperature-/potential-combination.
  • the potential was: +200 mV versus SCE.
  • the CCT-value for each sample was defined as the temperature resulted in a corrosion current density of at least 0.01 mA/cm 2 in 60 s. This testing is extremely tough, since the material is tested in an active state, whereas it in the preceding testings was passivated before testing, when the temperature was low. The ability of the material to form a passivating oxide layer at certain temperature was measured in this Testing 3. The passivating temperature is for most of the materials considerably lower than the CCT.
  • a comparison of the alloy 26 and 27 in the testing 2 shows that the alloy 26 was not passivated at 45° C., whereas the alloy 27 was passivated at 45° C. as well as at 55° C. However, it may not be passivated at 65°. This means that if a corrosion attack has been started as a consequence of for example an over temperature, the alloy 27 will be able to be passivated already when the temperature falls down below 55° C., which remarkably reduces the risk for propagating attacks upon disturbances in the operation of the plate heat exchanger.
  • the alloy 27 having a higher content of Mo has a better ability to be passivated than the alloy 26 in spite of the fact that the alloy 26 has a higher Eq1-value.
  • the conclusion is that the Eq1-value well describes the initiation and the propagation of crevice corrosion, while passivation against crevice corrosion is mainly controlled by the material content of Mo.
  • An alloy according to another embodiment of the invention has the following approximate composition: C 0.017%, Si 0.2%, Mn 0.5%, P 0.005%, S 0.006%, Cr 26%, Ni 7%, Mo 5.2%, W ⁇ 0.01%, Cu ⁇ 0.01%, Co ⁇ 0.010%, Ti ⁇ 0.005%, Al 0.004%, B 24 ppm, Ca 22 ppm, N 0.41%.
  • Testing of critical crevice temperature (CCT) according to MTI-2 for two samples resulted in 65° C. and 70° C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US12/519,069 2006-12-14 2007-12-13 Plate Abandoned US20100084121A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0602697-5 2006-12-14
SE0602697A SE530847C2 (sv) 2006-12-14 2006-12-14 Platta till plattvärmeväxlare, plattvärmeväxlare uppbyggd av sådana plattor samt användning av denna plattvärmeväxlare
PCT/SE2007/050986 WO2008073047A1 (en) 2006-12-14 2007-12-13 Plate of a plate heat exchanger, a plate heat exchanger made of these plates and use of this plate heat exchanger

Publications (1)

Publication Number Publication Date
US20100084121A1 true US20100084121A1 (en) 2010-04-08

Family

ID=39511973

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/519,069 Abandoned US20100084121A1 (en) 2006-12-14 2007-12-13 Plate

Country Status (7)

Country Link
US (1) US20100084121A1 (sv)
EP (1) EP2097550A1 (sv)
JP (1) JP2010513708A (sv)
CN (1) CN101558181A (sv)
BR (1) BRPI0720285A2 (sv)
SE (1) SE530847C2 (sv)
WO (1) WO2008073047A1 (sv)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140003989A1 (en) * 2011-03-10 2014-01-02 Shinnosuke Kurihara Duplex stainless steel
US10352631B2 (en) * 2010-11-17 2019-07-16 Mitsubishi Heavy Industries Thermal Systems, Ltd. Layered heat exchanger and heat medium heating apparatus
CN110565012A (zh) * 2019-07-19 2019-12-13 浙江青山钢铁有限公司 一种超高铬铁素体不锈钢连铸制造方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE533067C2 (sv) 2008-10-03 2010-06-22 Alfa Laval Corp Ab Plattvärmeväxlare
CN102041455B (zh) * 2009-10-23 2013-03-27 宝山钢铁股份有限公司 换热器焊管用不锈钢及其制造方法
WO2017013180A1 (en) * 2015-07-20 2017-01-26 Sandvik Intellectual Property Ab Duplex stainless steel and formed object thereof
WO2017013181A1 (en) * 2015-07-20 2017-01-26 Sandvik Intellectual Property Ab New use of a duplex stainless steel
CN112292467A (zh) * 2018-06-15 2021-01-29 山特维克材料技术公司 双相不锈钢带及其制造方法
CN115948698A (zh) * 2022-12-30 2023-04-11 广东省科学院新材料研究所 一种双相不锈钢材料及其在制备海水换热器中的应用

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4942922A (en) * 1988-10-18 1990-07-24 Crucible Materials Corporation Welded corrosion-resistant ferritic stainless steel tubing having high resistance to hydrogen embrittlement and a cathodically protected heat exchanger containing the same
US6048413A (en) * 1994-05-21 2000-04-11 Park; Yong Soo Duplex stainless steel with high corrosion resistance
US20030133823A1 (en) * 2001-09-02 2003-07-17 Ann Sundstrom Use of a duplex stainless steel alloy
US20060191605A1 (en) * 2003-06-30 2006-08-31 Kazuhiro Ogawa Duplex stainless steel

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD156057A3 (de) * 1980-10-14 1982-07-28 Dieter Boehm Plattenwaermeuebertrager
US4915752A (en) * 1988-09-13 1990-04-10 Carondelet Foundry Company Corrosion resistant alloy
JP3227734B2 (ja) * 1991-09-30 2001-11-12 住友金属工業株式会社 高耐食二相ステンレス鋼とその製造方法
JP3166798B2 (ja) * 1992-10-06 2001-05-14 住友金属工業株式会社 耐食性、相安定性に優れた二相ステンレス鋼
JP3446294B2 (ja) * 1994-04-05 2003-09-16 住友金属工業株式会社 二相ステンレス鋼
JPH1060598A (ja) * 1996-08-19 1998-03-03 Nkk Corp 耐海水性用析出強化型二相ステンレス鋼
SE514044C2 (sv) * 1998-10-23 2000-12-18 Sandvik Ab Stål för havsvattentillämpningar
JP4703831B2 (ja) * 2000-09-29 2011-06-15 株式会社日阪製作所 プレート式熱交換器
JP4849731B2 (ja) * 2001-04-25 2012-01-11 日新製鋼株式会社 延性に優れたＭｏ含有高Ｃｒ高Ｎｉオーステナイト系ステンレス鋼板および製造法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4942922A (en) * 1988-10-18 1990-07-24 Crucible Materials Corporation Welded corrosion-resistant ferritic stainless steel tubing having high resistance to hydrogen embrittlement and a cathodically protected heat exchanger containing the same
US6048413A (en) * 1994-05-21 2000-04-11 Park; Yong Soo Duplex stainless steel with high corrosion resistance
US20030133823A1 (en) * 2001-09-02 2003-07-17 Ann Sundstrom Use of a duplex stainless steel alloy
US20060191605A1 (en) * 2003-06-30 2006-08-31 Kazuhiro Ogawa Duplex stainless steel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10352631B2 (en) * 2010-11-17 2019-07-16 Mitsubishi Heavy Industries Thermal Systems, Ltd. Layered heat exchanger and heat medium heating apparatus
US20140003989A1 (en) * 2011-03-10 2014-01-02 Shinnosuke Kurihara Duplex stainless steel
US9512509B2 (en) * 2011-03-10 2016-12-06 Nippon Steel & Sumitomo Metal Corportion Duplex stainless steel
CN110565012A (zh) * 2019-07-19 2019-12-13 浙江青山钢铁有限公司 一种超高铬铁素体不锈钢连铸制造方法

Also Published As

Publication number Publication date
WO2008073047A1 (en) 2008-06-19
BRPI0720285A2 (pt) 2014-02-25
SE0602697L (sv) 2008-06-15
CN101558181A (zh) 2009-10-14
SE530847C2 (sv) 2008-09-30
JP2010513708A (ja) 2010-04-30
EP2097550A1 (en) 2009-09-09

Similar Documents

Publication Publication Date Title
US20100084121A1 (en) Plate
EP0708845B1 (en) Ferritic-austenitic stainless steel and use of the steel
US6220306B1 (en) Low carbon martensite stainless steel plate
US6248187B1 (en) Corrosion resisting steel and corrosion resisting oil well pipe having high corrosion resistance to carbon dioxide gas
US6749697B2 (en) Duplex stainless steel
US6312532B1 (en) Ferritic-austenitic steel alloy
US20070089810A1 (en) Duplex stainless steel alloy for use in seawater applications
KR20090078813A (ko) 듀플렉스 스테인리스 강 합금 및 이 합금의 용도
EP1722002B1 (en) Duplex steel alloy
US20090081069A1 (en) Austenitic stainless steel
AU2002328002A1 (en) Duplex steel alloy
CN111041358A (zh) 双相铁素体奥氏体不锈钢
JP5324149B2 (ja) 耐食オーステナイト系ステンレス鋼
US6918967B2 (en) Corrosion resistant austenitic alloy
US4715908A (en) Duplex stainless steel product with improved mechanical properties
JPS6358214B2 (sv)
US4808371A (en) Exterior protective member made of austenitic stainless steel for a sheathing heater element
EP0320548B1 (en) Method of making a duplex stainless steel and a duplex stainless steel product with improved mechanical properties
KR100413822B1 (ko) 해수 열교환기용 페라이트계 스테인레스강
EP4174205A1 (en) Two-phase stainless steel pipe and welded fitting
JPH06336653A (ja) 原子力発電所海水ポンプ用ステンレス鋳鋼及びステンレス鋳鋼品の製造方法

Legal Events

Date Code Title Description
AS Assignment

Owner name: KRONOPLUS TECHNICAL AG,SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DOHRING, DIETER;SCHAFER, HANS;HANITZSCH, UDO;SIGNING DATES FROM 20090615 TO 20090629;REEL/FRAME:023012/0478

AS Assignment

Owner name: SANDVIK INTELLECTUAL PROPERTY AB,SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIVISAKK, ULF;GORANSSON, KENNETH;SIGNING DATES FROM 20090701 TO 20090712;REEL/FRAME:023606/0790

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION