EP0177739A2 - Emploi d'un acier pour des pièces utilisées dans la technique du froid - Google Patents
Emploi d'un acier pour des pièces utilisées dans la technique du froid Download PDFInfo
- Publication number
- EP0177739A2 EP0177739A2 EP85110945A EP85110945A EP0177739A2 EP 0177739 A2 EP0177739 A2 EP 0177739A2 EP 85110945 A EP85110945 A EP 85110945A EP 85110945 A EP85110945 A EP 85110945A EP 0177739 A2 EP0177739 A2 EP 0177739A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- steel
- temperature
- toughness
- cold
- contents
- 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.)
- Withdrawn
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 67
- 239000010959 steel Substances 0.000 title claims abstract description 67
- 238000005057 refrigeration Methods 0.000 title claims abstract description 9
- 238000005516 engineering process Methods 0.000 title claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 33
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 18
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 238000001953 recrystallisation Methods 0.000 claims abstract description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 20
- 229910052799 carbon Inorganic materials 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 229910052698 phosphorus Inorganic materials 0.000 claims description 12
- 229910052717 sulfur Inorganic materials 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 7
- 238000005098 hot rolling Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 4
- 229910000734 martensite Inorganic materials 0.000 claims description 2
- 229910000640 Fe alloy Inorganic materials 0.000 claims 1
- 229910001563 bainite Inorganic materials 0.000 claims 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims 1
- 229910000859 α-Fe Inorganic materials 0.000 claims 1
- 239000003949 liquefied natural gas Substances 0.000 abstract description 9
- 239000000203 mixture Substances 0.000 abstract description 9
- 238000000137 annealing Methods 0.000 abstract description 8
- 229910052802 copper Inorganic materials 0.000 abstract description 6
- 238000003860 storage Methods 0.000 abstract description 3
- 238000004458 analytical method Methods 0.000 abstract description 2
- 238000011282 treatment Methods 0.000 abstract description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 61
- 239000011572 manganese Substances 0.000 description 19
- 238000010438 heat treatment Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 239000010949 copper Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 229910001199 N alloy Inorganic materials 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- 229910000756 V alloy Inorganic materials 0.000 description 3
- 238000005275 alloying Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 229910052756 noble gas Inorganic materials 0.000 description 2
- 150000002835 noble gases Chemical class 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910002065 alloy metal Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- SKKMWRVAJNPLFY-UHFFFAOYSA-N azanylidynevanadium Chemical compound [V]#N SKKMWRVAJNPLFY-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
Images
Classifications
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0636—Metals
- F17C2203/0639—Steels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/22—Assembling processes
- F17C2209/221—Welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
Definitions
- the invention relates to the use of a weldable, cold-tough ferritic Ni steel
- LNG Liquid Natural Gas
- B. ethylene, nitrogen, hydrogen and certain noble gases for ship transport in question.
- Liquefied gas can be transported inexpensively since it takes up only a small part of its volume, which is gaseous at room temperature.
- Low-temperature steels are ferritic or austenitic structural steels which are characterized by particularly good toughness properties down to very low operating temperatures. Such structural steels can be subjected to the usual processing operations such as cold forming, hot forming, thermal cutting and welding.
- the most important alloying element for achieving sufficient toughness of ferritic structural steels at low temperatures is known to be nickel.
- the ⁇ region is expanded by nickel, the A 3 conversion point and the critical cooling rate are markedly reduced.
- the drop in toughness is shifted to lower temperatures.
- the addition of 1% Ni causes the transition temperatures to decrease by approx. 30 ° C, above that there are improvements of about 10 ° C per 1% Ni.
- the 9% nickel steel X 8 Ni 9 is used worldwide.
- this material In the area of the boiling point of methane (- 161.5 ° C), this material has considerable toughness reserves; it is used up to the temperature of liquid nitrogen (- 196 ° C).
- This 2-stage glow cycle may need to be repeated several times.
- DE-OS 30 30 652 shows a cold-tough ferritic steel which essentially contains 0.02-0.06% carbon, 4-6% manganese, 0.1-0.4 molybdenum and 0-3% nickel and which also has to be subjected to a very complex heat treatment.
- the invention has for its object to provide a weldable cold-tough ferritic steel that with the lowest possible nickel content for cryogenic applications, ie. H. is suitable for operating temperatures below - 100 ° C.
- the steel of equivalent quality X 8Ni 9 should offer sufficient security against brittle failure.
- other alloy metals such as manganese and molybdenum should also be saved and the steel should also be easy to manufacture, i.e. its manufacturing process should do without complicated, time, control and space-requiring operations with multi-stage annealing cycles, accelerated cooling and the like.
- the invention proposes, according to claim 1, alloying a ferritic steel with specific analysis on the basis of closely selected C, Mn, and above all Ni contents with V and N, hot-rolling and allowing it to cool after melting . After normalizing under recrystallization, these steels are to be used as a weldable material with improved low-temperature toughness and high strength for the manufacture of refrigeration components in the range of - 100 ° C and below.
- the cooling rate of the normalization temperature can be varied over a wide range without sacrificing the excellent toughness.
- the large strength range specified in the Euronorm 129-76 for the X 8 Ni 9 for adaptation to customer requirements can be achieved for the steels according to the invention solely by varying the cooling rate, it being known that increased strengths are set by faster cooling (see Examples 1, 2 and 3).
- the previously described "normalizing" represents an important simplification compared to the complex heat treatment of the X 8 Ni 9.
- the steels according to the invention are e.g. B. with the known welding process for the X 8 Ni 9 crack-free and show a good low-temperature toughness of the weld (see Example 6).
- Claim 2 preferably names Ni contents of 5-6%.
- Fig. 1 shows the influence of the V and N alloy according to the invention on the low-temperature toughness.
- the transition temperature Tü indicates the temperature up to which the notched impact strength with increasing cooling of the sample is still above the value of at least 42 J which is valid as the criterion of toughness for the longitudinal ISO sample.
- Curve A shows, in comparison to curve B (without V and N alloy,) that the greatest possible effect by V and N to increase the low-temperature toughness and at the same time the lowest transition temperature is achieved when the steels 5-6% Ni contain.
- the comparison of curve A with curve B further shows that the "VN effect" has an effect in the entire range of the Ni contents of 1-9%. It occurs preferably in the range of 4-7% Ni and preferably in a range restricted to 5-6% Ni.
- Claim 5 defines the use of the steels according to the invention in a temperature range which was previously reserved for more complex steels with regard to alloy and production.
- Claim 6 describes the effect of the measure according to the invention on the structure of the structure and the low-temperature properties caused thereby, which are at least the same as the X 8 Ni 9 (see Examples 1, 3, 5) or far exceed it in terms of the transition temperature (see Example 2).
- FIGS. 1 to 6 represent the properties which are decisive for the use of the steels according to the invention.
- 3 and 4 are only longitudinal values (33, 43).
- Example 2 was rolled out in the same way as in Example 1 and normalized.
- the high yield strength of this steel allows a weight-saving construction. It can be derived from the A v -T curve in FIG. 3 that the steel is still tough even at ⁇ 230 ° C. and has considerable toughness reserves with a toughness of 200 J in the LNG application area.
- Example 2 was rolled out in the same way as in Example 1, then heated to 790 ° C. and then cooled in water. As the following test values show, this treatment results in a considerable increase in the yield strength and strength.
- Another way to increase the yield strength and tensile strength is to alloy the material with copper.
- Example 1 was rolled out and annealed as in Example 1.
- this steel has excellent toughness properties. It also has a yield strength of 591 N / mm2, a tensile strength of 666 N / mm2 and an elongation of 29.2%.
- the A v value at - 196 ° C is 116 J (ISO-V longitudinal).
- An austenitic filler material was used for welding - as is common for steel X 8 Ni 9. No cracks were observed in the welded joints.
- the notched impact strength was tested on ISO-V specimens (transverse to the rolling direction) at - 160 ° C and - 196 ° C.
- weldable steels according to the invention can be used with sufficient security against brittle failure despite less complex alloy and significantly simplified production for high-strength components of refrigeration technology down to operating temperatures of -196 C and below.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19843432337 DE3432337A1 (de) | 1984-09-03 | 1984-09-03 | Verfahren zur herstellung eines stahles und dessen verwendung |
| DE3432337 | 1984-09-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0177739A2 true EP0177739A2 (fr) | 1986-04-16 |
| EP0177739A3 EP0177739A3 (fr) | 1988-11-30 |
Family
ID=6244527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP85110945A Withdrawn EP0177739A3 (fr) | 1984-09-03 | 1985-08-30 | Emploi d'un acier pour des pièces utilisées dans la technique du froid |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4687525A (fr) |
| EP (1) | EP0177739A3 (fr) |
| JP (1) | JPS61124523A (fr) |
| DE (1) | DE3432337A1 (fr) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61127815A (ja) * | 1984-11-26 | 1986-06-16 | Nippon Steel Corp | 高アレスト性含Ｎｉ鋼の製造法 |
| TW396254B (en) | 1997-06-20 | 2000-07-01 | Exxon Production Research Co | Pipeline distribution network systems for transportation of liquefied natural gas |
| TW359736B (en) * | 1997-06-20 | 1999-06-01 | Exxon Production Research Co | Systems for vehicular, land-based distribution of liquefied natural gas |
| TW444109B (en) * | 1997-06-20 | 2001-07-01 | Exxon Production Research Co | LNG fuel storage and delivery systems for natural gas powered vehicles |
| TW396253B (en) * | 1997-06-20 | 2000-07-01 | Exxon Production Research Co | Improved system for processing, storing, and transporting liquefied natural gas |
| TW436597B (en) * | 1997-12-19 | 2001-05-28 | Exxon Production Research Co | Process components, containers, and pipes suitable for containign and transporting cryogenic temperature fluids |
| DZ2531A1 (fr) * | 1997-12-19 | 2003-02-08 | Exxon Production Research Co | Procédé de préparation d'une tôle d'acier double phase cette tôle et procédé pour renforcer la résistance à la propagation des fissures. |
| US6159312A (en) * | 1997-12-19 | 2000-12-12 | Exxonmobil Upstream Research Company | Ultra-high strength triple phase steels with excellent cryogenic temperature toughness |
| DE10050371A1 (de) * | 2000-10-11 | 2002-05-02 | Siemens Ag | Vorrichtung mit im kryogenen Temperaturbereich ferromagnetischem und mechanisch belastbarem Bauteil |
| JP2005525509A (ja) | 2001-11-27 | 2005-08-25 | エクソンモービル アップストリーム リサーチ カンパニー | 天然ガス車両のためのｃｎｇ貯蔵及び送出システム |
| US6852175B2 (en) * | 2001-11-27 | 2005-02-08 | Exxonmobil Upstream Research Company | High strength marine structures |
| SE0300224L (sv) * | 2003-01-30 | 2004-06-29 | Sandvik Ab | En gängtapp för att skära gängor i bottenhål och metoder för dess tillverkning |
| US9746134B2 (en) * | 2013-03-28 | 2017-08-29 | GM Global Technology Operations LLC | Method of storing and using natural gas in a vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1272555B (de) * | 1963-11-18 | 1968-07-11 | Yawata Iron & Steel Co | Stahllegierung mit einer hohen Zaehigkeit bei niedrigen Temperaturen und Verfahren zuihrer Waermebehandlung |
| US3619302A (en) * | 1968-11-18 | 1971-11-09 | Yawata Iron & Steel Co | Method of heat-treating low temperature tough steel |
| DE2039910B2 (de) * | 1970-08-11 | 1973-08-02 | Nippon Steel Corp , Tokio | Waermebehandlungsverfahren fuer einen stahl |
| US3960612A (en) * | 1973-08-15 | 1976-06-01 | Nippon Steel Corporation | Method for producing a low temperature high strength tough steel |
| DE3030652A1 (de) * | 1979-08-13 | 1981-03-26 | United States Department Of Energy, Washington, D.C. | Stahllegierung |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL289859A (fr) * | 1963-03-06 | |||
| DE1483333B1 (de) * | 1964-06-22 | 1971-08-26 | Yawata Iron and Steel Co , Ltd , Tokio | Verwendung eines stahles als tieftemperaturzaeh/er werk stoff |
| JPS4935485B1 (fr) * | 1964-06-22 | 1974-09-24 | ||
| US3834949A (en) * | 1973-02-14 | 1974-09-10 | Inland Steel Co | Hot rolled flat steel article for cryogenic service and method for producing same |
| US4138278A (en) * | 1976-08-27 | 1979-02-06 | Nippon Steel Corporation | Method for producing a steel sheet having remarkably excellent toughness at low temperatures |
| JPS5633425A (en) * | 1979-08-24 | 1981-04-03 | Sumitomo Metal Ind Ltd | Manufacture of tempered high tensile steel sheet having excellent low temperature toughness |
-
1984
- 1984-09-03 DE DE19843432337 patent/DE3432337A1/de active Granted
-
1985
- 1985-08-30 US US06/771,305 patent/US4687525A/en not_active Expired - Fee Related
- 1985-08-30 EP EP85110945A patent/EP0177739A3/fr not_active Withdrawn
- 1985-09-03 JP JP60193303A patent/JPS61124523A/ja active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1272555B (de) * | 1963-11-18 | 1968-07-11 | Yawata Iron & Steel Co | Stahllegierung mit einer hohen Zaehigkeit bei niedrigen Temperaturen und Verfahren zuihrer Waermebehandlung |
| US3619302A (en) * | 1968-11-18 | 1971-11-09 | Yawata Iron & Steel Co | Method of heat-treating low temperature tough steel |
| DE2039910B2 (de) * | 1970-08-11 | 1973-08-02 | Nippon Steel Corp , Tokio | Waermebehandlungsverfahren fuer einen stahl |
| US3960612A (en) * | 1973-08-15 | 1976-06-01 | Nippon Steel Corporation | Method for producing a low temperature high strength tough steel |
| DE3030652A1 (de) * | 1979-08-13 | 1981-03-26 | United States Department Of Energy, Washington, D.C. | Stahllegierung |
Non-Patent Citations (1)
| Title |
|---|
| EURONORM, 129-76, M{rz 1976, Seiten 1-9 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0244888B2 (fr) | 1990-10-05 |
| EP0177739A3 (fr) | 1988-11-30 |
| DE3432337A1 (de) | 1986-03-13 |
| JPS61124523A (ja) | 1986-06-12 |
| US4687525A (en) | 1987-08-18 |
| DE3432337C2 (fr) | 1987-07-02 |
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