WO2012133574A1 - 耐食性及びろう付け性に優れたオーステナイト系ステンレス鋼 - Google Patents

耐食性及びろう付け性に優れたオーステナイト系ステンレス鋼 Download PDF

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WO2012133574A1
WO2012133574A1 PCT/JP2012/058220 JP2012058220W WO2012133574A1 WO 2012133574 A1 WO2012133574 A1 WO 2012133574A1 JP 2012058220 W JP2012058220 W JP 2012058220W WO 2012133574 A1 WO2012133574 A1 WO 2012133574A1
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brazing
stainless steel
test
corrosion resistance
austenitic stainless
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PCT/JP2012/058220
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English (en)
French (fr)
Japanese (ja)
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透 松橋
純 徳永
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新日鐵住金ステンレス株式会社
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Priority to AU2012233539A priority Critical patent/AU2012233539B2/en
Priority to CN201280009312.8A priority patent/CN103380224B/zh
Priority to US14/002,932 priority patent/US20130336834A1/en
Priority to KR1020137024172A priority patent/KR20130123443A/ko
Priority to NZ614829A priority patent/NZ614829B2/en
Priority to CA2829874A priority patent/CA2829874C/en
Publication of WO2012133574A1 publication Critical patent/WO2012133574A1/ja

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    • 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
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of 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
    • C22C38/001—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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • 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
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • 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
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron

Definitions

  • the present invention relates to an austenitic stainless steel used for a structure joined with a brazing material such as nickel brazing or copper brazing.
  • a brazing material such as nickel brazing or copper brazing.
  • the present invention not only has excellent brazing properties, but also has corrosion resistance in an environment where condensed water having a low pH containing nitrate ions and sulfate ions is generated due to condensation of combustion exhaust gas.
  • the present invention relates to an austenitic stainless steel having excellent corrosion resistance in an aqueous solution environment.
  • Brazing joining is a technique for joining materials by using a brazing material having a melting point lower than that of the structural material and heat-treating it at a temperature slightly higher than the melting point of the brazing material.
  • Brazing joining is a joining method widely used also in stainless steel.
  • the brazing material used for brazing stainless steel is a nickel or copper alloy.
  • brazing joining is performed in a vacuum or in a hydrogen atmosphere in order to reduce and remove the passive film.
  • the temperature of brazing joining is, for example, about 1100 ° C. when nickel brazing is used.
  • brazing and joining it is important that the brazing material sufficiently fills the gaps between the materials to be joined to ensure the strength of the joint. Therefore, the wettability of the brazing material with respect to the stainless steel to be joined becomes important. On the other hand, if the wettability of the brazing material is too good, the brazing material flows out from the gaps between the materials to be joined, the gap cannot be filled with the brazing material, and the bonding strength is reduced. For this reason, it is important to have appropriate wettability as stainless steel excellent in brazing joint.
  • Austenitic stainless steel is generally used as the stainless steel to be brazed.
  • JIS Japanese Industrial Standard
  • SUS304-based material and SUS316-based material are widely used.
  • the SUS304-based material and the SUS316-based material have not only processability but also characteristics excellent in corrosion resistance in a general environment.
  • the problem is that SUS316-based materials and SUS316-based materials are inferior in stress corrosion cracking resistance.
  • Stress corrosion cracking occurs when tensile stress remains in a material that is highly susceptible to stress corrosion cracking and exposed to an environment where corrosion occurs.
  • austenitic stainless steel is joined by brazing, there is no fear of stress corrosion cracking even if tensile stress remains in the material to be joined before brazing joining. This is because the austenitic stainless steel is brazed at a temperature at which the austenitic stainless steel is annealed, and residual stress is removed during brazing. For example, when nickel brazing is used, it is brazed at about 1100 ° C. as described above.
  • an austenitic stainless steel brazing joint material for example, there are an exhaust system member of an automobile and a secondary heat exchanger of a water heater provided with a latent heat recovery unit. All of these members are used in an environment in which condensed water having a low pH containing nitrate ions and sulfate ions is generated because the combustion exhaust gas is condensed. This is because the atmosphere taken in for combustion contains a large amount of nitrogen, and the fuel or the odorizing substance added to the fuel contains a sulfur compound. Under such circumstances, copper is corroded. Therefore, copper cannot be used as a material constituting an automobile exhaust system member or a secondary heat exchanger of a water heater provided with a latent heat recovery device, and austenitic stainless steel is essential.
  • the austenitic stainless steel used for such members it is important for the austenitic stainless steel used for such members to satisfy both corrosion resistance and brazing even in an environment where condensed water containing nitrate ions and sulfate ions and having a low pH is generated. .
  • Patent Document 1 proposes a pre-coated brazed metal sheet in which a nickel brazing material suspended together with an organic binder is spray-coated on a stainless steel plate surface and then heated.
  • Patent Document 2 proposes a method for producing a nickel brazing-coated stainless steel sheet excellent in self-brazing property, in which a nickel-based brazing material is coated by plasma spraying on a stainless steel sheet having an adjusted surface roughness. ing.
  • Patent Documents 1 and 2 only conventional SUS304-based materials and SUS316-based materials are examined as austenitic stainless steel materials to which a brazing material is applied.
  • Patent Document 3 proposes a stainless steel excellent in brazing property in which Al and Ti are reduced.
  • both Patent Documents 3 and 4 are studies on ferritic stainless steel, and austenitic stainless steel has not been studied.
  • Patent Document 5 proposes an austenitic stainless steel material having stress corrosion cracking resistance and crevice corrosion resistance.
  • the steel sheet proposed in Patent Document 5 is applied to automobile oil supply system members, and although stress corrosion cracking resistance has been studied, brazing performance is not described.
  • chlorides are contained in the intake air, so it is used especially in high salt damage areas near the coast.
  • corrosion resistance in an environment containing chloride ions is also a problem.
  • the present invention not only has excellent brazing properties, but also has corrosion resistance in an environment where condensed water having low pH containing nitrate ions and sulfate ions is generated by condensation of combustion exhaust gas, and further contains chloride ions. It aims at providing the austenitic stainless steel which is excellent also in the corrosion resistance in aqueous solution environment.
  • the present invention has been made on the basis of the above findings, and the gist thereof is as follows.
  • Nb 0.1 to 0.7%
  • Ti 0.1 to 0.5%
  • V 0.1 to 3.0%
  • B 0.0002% to The austenitic stainless steel excellent in corrosion resistance and brazing as described in (1) above, containing one or more of 0.003%.
  • an austenitic stainless steel excellent in corrosion resistance and brazing is provided by optimizing the Cu content and the Si content in the austenitic stainless steel and further controlling the N content and the Mo content. Is possible.
  • the structure obtained by brazing joining such as a waste heat recovery device of combustion exhaust gas which used hydrocarbons, such as gasoline, LNG, LPG, and petroleum, and other heat exchangers Corrosion resistance can be improved.
  • % relating to the component composition means “% by mass” unless otherwise specified.
  • the austenitic stainless steel was hot-rolled and heat-treated at 1150 ° C. for 1 minute, and then the scale was ground and removed, and further cold-rolled to obtain a cold-rolled sheet.
  • This cold-rolled sheet is heat-treated at 1050 to 1150 ° C. for 1 minute based on the recrystallization behavior, and then subjected to immersion pickling treatment until the scale is completely removed in an aqueous nitric hydrofluoric acid solution. It was made a material for. Using this brazing material, brazing properties and stress corrosion cracking were evaluated.
  • the brazing joint material was cut into 40 ⁇ 50 mm and 25 ⁇ 30 mm, and used as test materials for brazing evaluation.
  • the thickness of this brazing material evaluation test material is 1 mm.
  • the specimen material thus produced was brazed using silver brazing.
  • 0.3 g of JIS BNi5 nickel brazing mixed with an organic binder was placed as a brazing material in the overlapping portion where two test materials were stacked, and brazing joined.
  • the brazing joining was performed in an atmosphere of 1100 ° C. and 100% hydrogen using a hydrogen reduction furnace. Brazing property was evaluated by cutting a brazed specimen and visually observing a cross section.
  • the brazing material was heated in the atmosphere of 1100 ° C. and 100% hydrogen using the same conditions as when brazing, ie, using a hydrogen reduction furnace, without brazing. After this heating, the brazing joint material was cut into a size of 30 ⁇ 30 mm and 15 ⁇ 15 mm and the cut end face was polished. The two materials having different sizes were overlapped and spot welded at the center, and a gap was provided between the two materials to obtain a test material for stress corrosion cracking evaluation.
  • the stress corrosion cracking evaluation test material 200 ppm of Cl - is immersed in an aqueous solution containing was held at 100 ° C. 7 days. After 7 days, the spot weld was punched and separated, and the presence or absence of cracks in the inner clearance surface was evaluated. The presence or absence of cracks was confirmed by a dye penetration test (color check method).
  • the effect of suppressing the stress corrosion cracking can be obtained by the synergistic effect of Cu and Si represented by the value of [Cu] ⁇ [Si] even in the brazed austenitic stainless steel. did. Therefore, the lower limit of the value of [Cu] ⁇ [Si] is set to 1.6. More preferably, it is set to 2.0.
  • the structure to be brazed is used as an exhaust system member of an automobile, a secondary heat exchanger of a water heater provided with a latent heat recovery device, or the like. Therefore, it is not sufficient for the austenitic stainless steel constituting the brazed joint structure to be excellent only in brazing and stress corrosion cracking properties.
  • the material used as the test material is excellent in brazeability and stress corrosion resistance, that is, an austenitic stainless steel having a value of [Cu] ⁇ [Si] in the range of 1.6 to 4.4.
  • the test liquid can simulate the composition of condensed water generated by combustion of general LNG or petroleum. Specifically, the test solution was adjusted to nitrate ion 100 ppm, sulfate ion 10 ppm, pH 2.5, and had a composition in which chloride ions were added at 100 ppm in terms of Cl 2 ⁇ to accelerate corrosion.
  • the maximum pitting corrosion depth may be 100 ⁇ m or more.
  • the Cu content was outside the range described below. This is because Cu is eluted and ionized during corrosion in a wet and dry repeated corrosive environment containing an oxidizing agent such as nitrate ions. And in such an environment, since Cu ion works as an oxidizing agent inside and outside the corrosion hole, it is estimated that the corrosion depth has increased.
  • the upper limit of 2 [N] + [Mo] is 1.0 or less.
  • a preferable upper limit is 0.77, and a more preferable upper limit is 0.74.
  • the lower limit of 2 [N] + [Mo] is 0.16 as described above, and the preferable lower limit is 0.20.
  • the corrosion resistance refers to the stress corrosion cracking resistance, the corrosion resistance in an environment where condensed water having a low pH containing nitrate ions and sulfate ions is generated due to condensation of combustion exhaust gas, and further chloride ions.
  • the austenitic stainless steel of the present invention needs to satisfy the following formulas (A) and (B) for Cu, Si, Mo, and N.
  • the preferable C content is in the range of 0.005 to 0.060%.
  • Si is added to improve wettability and prevent stress corrosion cracking, as with Cu. If the Si content is less than 1.2%, these effects are not exhibited. On the other hand, when the Si content exceeds 3.0%, the wettability is excessively improved and the brazing property is lowered. Therefore, the Si content needs to be in the range of 1.2 to 3.0%. Preferably, it is in the range of 1.4 to 2.5%.
  • Mn is an important element as a deoxidizing element, but if it is added excessively, MnS that becomes a starting point of corrosion is likely to be generated. Therefore, the Mn content needs to be in the range of 0.4 to 2.0%. More preferably, it is in the range of 0.5 to 1.2%.
  • PP not only reduces weldability and workability, but also tends to cause intergranular corrosion, so P should be kept as low as possible. For this reason, the upper limit of the content of P needs to be 0.03%.
  • a preferable P content is in the range of 0.001 to 0.025%.
  • the S content is set to 0.003% or less.
  • the S content is preferably in the range of 0.0002 to 0.002%.
  • Ni does not affect stress corrosion cracking resistance in the amount specified by JIS SUS316L. However, there is a concern that the stress corrosion cracking resistance may deteriorate in an environment where the LNG or petroleum is exposed to exhaust gas when burned. Moreover, it is necessary to maintain an austenite phase and to ensure workability. Therefore, the Ni content needs to be in the range of 6.0 to 12.0%. Preferably, it is in the range of 6.5 to 11.0%.
  • Cr is the most important element for ensuring the corrosion resistance of stainless steel. Therefore, the lower limit of the Cr content is 16.0%. However, when Cr is increased, the corrosion resistance is also improved, but the manufacturability and other manufacturability are lowered, so the upper limit of the Cr content is 20.0%. A preferable Cr content is in the range of 16.5 to 19.0%.
  • the Cu, together with Si, reduces brazing by its addition, but has the function of suppressing stress corrosion cracking.
  • excessive addition of Cu reduces the corrosion resistance in a solution containing nitrate ions. Therefore, the Cu content needs to be in the range of 0.2 to 3.0%. Preferably, it is in the range of 0.5 to 2.5%.
  • Al is important as a deoxidizing element, and also refines the structure by controlling the composition of non-metallic inclusions.
  • the Al content needs to be in the range of 0.002 to 0.10%. Preferably it is 0.005 to 0.08% of range.
  • the N content needs to be in the range of 0.030 to 0.150%. Preferably, it is 0.037 to 0.10% of range.
  • Mo is an element that is effective in repairing the passive film and is very effective in improving corrosion resistance. Furthermore, in an environment containing nitrate ions and chloride ions, there is an effect of improving pitting corrosion resistance in combination with N. Therefore, it is necessary to contain Mo at least 0.1%. On the other hand, when Mo is increased, the corrosion resistance is improved, but excessive addition reduces workability and causes an increase in cost. Therefore, the upper limit of the Mo content needs to be 1.0%. A preferable Mo content is in the range of 0.2 to 0.8%.
  • Nb, Ti, V, and B may be contained alone or in combination as required.
  • Nb can be added as needed because it has the effect of generating carbonitrides to suppress sensitization in the vicinity of the weld and increasing the high-temperature strength.
  • the Nb content is preferably in the range of 0.1 to 0.7%.
  • Ti has the same effect as Nb, but excessive addition causes an increase in surface defects due to titanium nitride. Therefore, the Ti content is preferably in the range of 0.1 to 0.5%.
  • V improves weather resistance and crevice corrosion resistance, excellent workability can be secured if V is added while suppressing the use of Cr and Mo. Therefore, V can be added as necessary. However, excessive addition causes deterioration of workability. Therefore, the V content is preferably in the range of 0.1 to 3.0%.
  • the B is a grain boundary strengthening element effective for improving hot workability, and can be added as necessary. However, excessive addition causes a decrease in workability. Therefore, the B content is preferably 0.0002% at the lower limit and 0.003% at the upper limit.
  • Steel having the chemical composition shown in Table 1 was produced by a normal austenitic stainless steel production method. First, an ingot having a thickness of 40 mm was manufactured after vacuum melting, and this was hot rolled to a thickness of 4.0 mm. Thereafter, a heat treatment was performed at 1150 ° C. for 1 minute, the scale was removed by grinding, and a steel plate having a thickness of 1.0 mm was manufactured by cold rolling. This was heat-treated at 1050 to 1150 ° C. for 1 minute based on each recrystallization behavior, and then subjected to immersion pickling treatment until the scale was completely removed in an aqueous nitric hydrofluoric acid solution. It used for the test.
  • Brazing joining was performed by stacking two test materials in the same manner as described above. Specifically, 0.3 g of JIS BNi5 silver brazing mixed with an organic binder was placed on the overlapping part of the test material and brazed and joined. The brazing joining was performed in an atmosphere of 1100 ° C. and 100% hydrogen using a hydrogen reduction furnace. In the evaluation method, the cross section of the brazed specimen was evaluated by visual observation as being good when the gap was completely filled with the gap and poor when the gap remained.
  • test material various stainless steels were heated in an atmosphere of 1100 ° C. and 100% hydrogen using the same conditions as when brazing without using brazing, that is, using a hydrogen reduction furnace. Then, it cut
  • the composition of the test solution was adjusted to nitrate ion 100 ppm, sulfate ion 10 ppm, pH 2.5 by simulating the composition of the condensed water generated by the combustion of general LNG or petroleum, and concentrated salt
  • the chloride ion was set to 100 ppm.
  • the test material was immersed in a test tube containing 10 ml of the test solution and placed in a warm bath at 80 ° C. This test solution was held until it completely dried, and after drying, the sample was transferred to a new test tube filled with the test solution and dried again. The maximum corrosion depth after the test after 14 times of this drying was measured.
  • Stress corrosion cracking evaluation test In the stress corrosion cracking evaluation test, the same material as that used in the brazeability test was subjected to the same conditions as when brazing without brazing, that is, using a hydrogen reduction furnace at 1100 ° C. and hydrogen. The heating was performed in a 100% atmosphere. From this material, it was cut into a size of 30 ⁇ 30 mm and 15 ⁇ 15 mm and wet-polished on the entire surface, and then the two sheets were overlapped and spot-welded to provide a gap. The specimen thus provided with the gap was immersed in distilled water containing 200 ppm of Cl 2 ⁇ and continuously treated at 100 ° C. for 7 days.
  • the value of [Cu] ⁇ [Si] and the value of 2 [N] + [Mo] are within the range of the present invention, but Cr is outside the lower limit of the range of the present invention, so the corrosion resistance test (wet and dry In the repeated test), the maximum pitting corrosion depth exceeded 100 ⁇ m.
  • the austenitic stainless steel of the present invention is excellent in brazing property and does not cause stress corrosion cracking even in an environment in a heat exchanger exposed to combustion gas of hydrocarbon fuel.
  • the austenitic stainless steel of the present invention is excellent in corrosion resistance in an environment where condensed water containing nitrate ions and sulfate ions is generated at a low pH and in an aqueous solution environment containing chloride ions. It could be confirmed.
  • the present invention is a structure for brazing austenitic stainless steel, corrosion resistance in an environment where condensed water containing nitrate ions and sulfate ions and having a low pH is generated, and in an aqueous solution containing chloride ions. It can be applied to all uses that require corrosion resistance.
  • the austenitic stainless steel of the present invention is particularly suitable for use as a heat exchanger material, particularly as a secondary heat exchanger material for a latent heat recovery type hot water heater using kerosene or LNG as fuel.
  • the austenitic stainless steel of the present invention can be applied not only to heat exchanger pipes but also to any materials such as cases and partition plates.
  • the austenitic stainless steel of the present invention is also suitable when used as a heat recovery component from exhaust gas such as EGR mounted on an automobile having gasoline and diesel engines.
  • the austenitic stainless steel of the present invention is particularly suitable for use in an environment of repeated wet and dry exposure to a low pH solution containing nitrate ions and sulfate ions.
  • outdoor exterior materials, building materials, roofing materials, outdoor equipment, etc. that are assumed to have an acid rain environment.
  • the austenitic stainless steel sheet of the present invention is generally used for water-related equipment where stress corrosion cracking is a concern, specifically, water storage / hot water storage tanks, home appliances, bathtubs, kitchen equipment, and other outdoor / indoor use. It is suitable for use in equipment.
  • the present invention has a high utility value in the industry.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Exhaust Silencers (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
PCT/JP2012/058220 2011-03-29 2012-03-28 耐食性及びろう付け性に優れたオーステナイト系ステンレス鋼 WO2012133574A1 (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU2012233539A AU2012233539B2 (en) 2011-03-29 2012-03-28 Highly corrosion-resistant austenite stainless steel well-suited to brazing
CN201280009312.8A CN103380224B (zh) 2011-03-29 2012-03-28 耐蚀性及钎焊性优异的奥氏体系不锈钢
US14/002,932 US20130336834A1 (en) 2011-03-29 2012-03-28 Austenitic stainless steel excellent in corrosion resistance and brazeability
KR1020137024172A KR20130123443A (ko) 2011-03-29 2012-03-28 내식성 및 브레이징성이 우수한 오스테나이트계 스테인리스 강
NZ614829A NZ614829B2 (en) 2011-03-29 2012-03-28 Highly corrosion-resistant austenite stainless steel well-suited to brazing
CA2829874A CA2829874C (en) 2011-03-29 2012-03-28 Austenitic stainless steel excellent in corrosion resistance and brazeability

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JP2011073205A JP6016331B2 (ja) 2011-03-29 2011-03-29 耐食性及びろう付け性に優れたオーステナイト系ステンレス鋼
JP2011-073205 2011-03-29

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AU (1) AU2012233539B2 (zh)
CA (1) CA2829874C (zh)
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EP2980244A4 (en) * 2013-03-28 2016-09-28 Nippon Steel & Sumikin Sst HEAT RESISTANT PANEL OF AUSTENITIC STAINLESS STEEL

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