US3656942A - Steel for low-temperature service - Google Patents
Steel for low-temperature service Download PDFInfo
- Publication number
- US3656942A US3656942A US47155A US3656942DA US3656942A US 3656942 A US3656942 A US 3656942A US 47155 A US47155 A US 47155A US 3656942D A US3656942D A US 3656942DA US 3656942 A US3656942 A US 3656942A
- Authority
- US
- United States
- Prior art keywords
- percent
- steel
- aluminum
- manganese
- carbon
- 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.)
- Expired - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 41
- 239000010959 steel Substances 0.000 title claims abstract description 41
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 40
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 38
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 37
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 19
- 239000012535 impurity Substances 0.000 claims abstract description 18
- 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 claims abstract description 18
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 18
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 18
- 239000010703 silicon Substances 0.000 claims abstract description 18
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 18
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 18
- 239000005864 Sulphur Substances 0.000 claims description 18
- 229910052698 phosphorus Inorganic materials 0.000 claims description 18
- 239000011574 phosphorus Substances 0.000 claims description 18
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 4
- 238000009863 impact test Methods 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- ZPUCINDJVBIVPJ-LJISPDSOSA-N cocaine Chemical compound O([C@H]1C[C@@H]2CC[C@@H](N2C)[C@H]1C(=O)OC)C(=O)C1=CC=CC=C1 ZPUCINDJVBIVPJ-LJISPDSOSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
Definitions
- this invention relates to-a steel containing 0.04 0.13 percent C, 0.15 0.30 percent Si, 0.30 0.90 percent Mn, 8.50 9.50 percent Ni, 0.020 0.060 percent Al, 0.008 0.020 percent N and up to 0.010 percent phosphorus, up to 0.010% sulphur and the balance iron and incidental impurities.
- the objects of the invention can be achieved by restricting the chemical composition of the general class of steel to a preferred range far narrower than the general range and also by introducing critical amounts of aluminum and nitrogen into the steel so that a desired amount of aluminum nitride may be precipitated.
- the preferred steel may then be used in the normalized or hardened and tempered conditions.
- the upper limit of the aluminum content is set at 0.060 per cent to avoid problems of inclusions and reduced purity of the steel.
- the lower limit is set at 0.02 percent because below this figure no useful deoxidation is achieved nor is the nitrogen completely taken up.
- the nitrogen content is controlled between 0.020 percent and 0.008 percent.
- the upper limit being determined by the upper limit of the aluminum content and the lower limit being determined by the requirement for at least a minimum amount of aluminum nitride.
- the reduced carbon and manganese contents and the aluminum nitride precipitation also contribute to the improved impact or notch toughness shown in the sample.
- a steel for low temperature service consisting essentially of 0.04 0.13 percent carbon, 0.15 0.30 percent silicon, 0.30 0.90 percent manganese, 8.50 9.50 percent nickel, 0.020 0.060 percent aluminum, 0.008 0.020 percent nitrogen, up to about 0.010 percent phosphorus, up to 0.010 percent sulphur and the balance iron and incidental impurities.
- a steel as claimed in claim 1 having a tensile strength of 5 at least 72 Kg/mm and an impact strength of at least 24 Kgm/cm in the normalized and tempered condition.
- a steel as claimed in claim 1 having a tensile strength of at least 71 Kg/mm and an impact strength of at least 28 Kgm/cm in the hardened and tempered condition.
- a steel as claimed in claim 1 having a tensile strength of at least 74 Kg/mm and an impact strength of at least 30 Kgm/cm in the hardened and tempered condition.
- a steel as claimed in claim 1 consisting essentially of 0.06 percent carbon, 0.21 percent silicon, 0.40 percent manganese, 0.010 percent phosphorus, 0.008 percent sulphur, 9.22 percent nickel, 0.045 percent aluminum, 0.0l3 percent nitrogen balance iron and incidental impurities.
- a steel as claimed in claim 1 consisting essentially of 0.05 percent carbon, 0.18 percent silicon, 0.42 percent manganese, 0.011 percent phosphorus, 0.005 percent sulphur, 9.20 percent nickel, 0.043 percent aluminum, 0.015 percent nitrogen balance iron and incidental impurities.
- a steel as claimed in claim 2 consisting essentially of 0.06 percent carbon, 0.21 percent silicon, 0.40 percent manganese, 0.010 percent phosphorus, 0.008 percent sulphur, 9.22 percent nickel, 0.045 percent aluminum, 0.013 percent nitrogen balance iron and incidental impurities.
- a steel as claimed in claim 2 consisting essentially of 0.05 percent carbon, 0. 18 percent silicon, 0.42 percent manganese, 0.011 percent phosphorus, 0.005 percent sulphur, 9.20 percent nickel, 0.043 percent aluminum, 0.015 percent nitrogen balance iron and incidental impurities.
- a steel as claimed in claim 3 consisting essentially of 0.06 percent carbon, 0.21 percent silicon, 0.40 percent manganese, 0.010 percent phosphorus, 0.008 percent sulphur, 9.22 percent nickel, 0.045 percent aluminum, 0.013 percent nitrogen balance iron and incidental impurities. 7
- a steel as claimed in claim 3 consisting essentially of 0.05 percent carbon, 0.18 percent silicon, 0.42 percent manganese, 0.011 percent phosphorus, 0.005 percent sulphur, 9.20 percent nickel, 0.043 percent aluminum, 0.015 percent nitrogen balance iron and incidental impurities.
- a steel as claimed in claim 4 consisting essentially of TABLE I I 55 0.06 percent carbon, 0.21 percent silicon, 0.40 percent manganese, 0.010 percent phosphorus, 0.008 percent sulphur, C Si P S M N 9.22 percent nickel, 0.045 percent aluminum, 0.013 percent Q06 0 40 0.010 (1008 22 [1045 M13 nitro en balance iron and incidental im urities Contents g P 1 3 42 w ll. 9 will? -1 As la slaimeqm am!
- the steel of the present invention has comparable tensile properties to the known steels for use at low temperatures.
- the carbon and manganese contents have been reduced and the tensile 0.05 percent carbon, 0.18 percent silicon, 0.42 percent manganese, 0.011 percent phosphorus, 0.005 percent sulphur, 9.20 percent nickel, 0.043 percent aluminum, 0.015 percent nitrogen balance iron and incidental impurities.
Abstract
A steel having excellent notch toughness, for service at low temperatures, which can be used in the normalized or hardened and tempered condition and which contains 0.4-0.13 percent Carbon, 0.15-0.30 percent Silicon, 0.30-0.90 percent Manganese, 8.50-9.50 percent Nickel, 0.020-0.060 percent Aluminum, 0.008-0.020 percent Nitrogen. Balance, Iron and incidental impurities.
Description
United States Patent Kambayashi et al.
[151 3,656,02 [451 Apr. 1, 1972 STEEL FOR LOW-TEMPERATURE SERVICE Inventors: Akira Kambayashi; Shun-lchi Shimada,
both of Kawasaki, Japan Assignee: Nippon Kokan Kabushiki Kaisha,
Kawasaki-shi, Kanagawa-ken, Japan I Filed: June 17, 1970 Appl. No.: 47,155
Foreign Application Priority Data June 21, 1969 Japan ..44/48793 U.S. Cl. ..75/124, 75/123 B, 75/123 K, 148/36 Int. Cl ..C22c 39/02, C22c 39/36 Field of Search ..75/123 K, 123 L, 124, 123 B; 148/36, 39
[56] References Cited UNITED STATES PATENTS 3,444,011 5/1969 Nagashima 148/36 X 3,496,034 2/1970 Alger ..148/36 X Primary Examiner-L. Dewayne Rutledge Assistant Examiner-J. E. Legru Attorney-Flynn & Frishauf [5 7] ABSTRACT 12 Claims, No Drawings 1 STEEL FOR LOW-TEMPERATURE SERVICE This invention relates to a steel having excellent notch toughness at low temperatures and which can be used in the normalized or hardened and tempered conditions. More specifically, this invention relates to-a steel containing 0.04 0.13 percent C, 0.15 0.30 percent Si, 0.30 0.90 percent Mn, 8.50 9.50 percent Ni, 0.020 0.060 percent Al, 0.008 0.020 percent N and up to 0.010 percent phosphorus, up to 0.010% sulphur and the balance iron and incidental impurities.
Steels of the above type are known generally to the art as ASTMA 353-67a and 553-67 steels, but these known types are not generally suitable for low temperature use under severe conditions because of their low notch strength. There is, however, a great demand for low temperature service steels and in order to satisfy that demand efforts have been made to improve the properties of this general class of steels. It is, therefore, an object of the present invention to provide an improve steel of the general ASTMA 353-67a or 553-67 type having improved properties, particularly at low temperatures.
It has been found, by one aspect of the invention, that the objects of the invention can be achieved by restricting the chemical composition of the general class of steel to a preferred range far narrower than the general range and also by introducing critical amounts of aluminum and nitrogen into the steel so that a desired amount of aluminum nitride may be precipitated. The preferred steel may then be used in the normalized or hardened and tempered conditions.
The upper limit of the aluminum content is set at 0.060 per cent to avoid problems of inclusions and reduced purity of the steel. The lower limit is set at 0.02 percent because below this figure no useful deoxidation is achieved nor is the nitrogen completely taken up.
The nitrogen content is controlled between 0.020 percent and 0.008 percent. The upper limit being determined by the upper limit of the aluminum content and the lower limit being determined by the requirement for at least a minimum amount of aluminum nitride.
The invention will be described in more detail by reference to a specific example.
EXAMPLE A steel having a chemical composition as set out in Table I below, was rolled to a plate thickness of 15 mm. Two samples of the rolled steel were then normalized at 800 C and tempered at 575 C and another sample was heat treated by hardening at 800 C quenching in water and tempered at 575 C for 1 hour. Tensile and impact tests were carried out on both samples as set out in Table 11. The tensile testing was conducted at room temperature and the impact testing was conducted zit-196 C.
strengthening effect obtained from the precipitation of aluminum nitride,
The reduced carbon and manganese contents and the aluminum nitride precipitation also contribute to the improved impact or notch toughness shown in the sample.
What is claimed is:
l. A steel for low temperature service consisting essentially of 0.04 0.13 percent carbon, 0.15 0.30 percent silicon, 0.30 0.90 percent manganese, 8.50 9.50 percent nickel, 0.020 0.060 percent aluminum, 0.008 0.020 percent nitrogen, up to about 0.010 percent phosphorus, up to 0.010 percent sulphur and the balance iron and incidental impurities.
2. A steel as claimed in claim 1 having a tensile strength of 5 at least 72 Kg/mm and an impact strength of at least 24 Kgm/cm in the normalized and tempered condition.
3. A steel as claimed in claim 1 having a tensile strength of at least 71 Kg/mm and an impact strength of at least 28 Kgm/cm in the hardened and tempered condition.
4. A steel as claimed in claim 1 having a tensile strength of at least 74 Kg/mm and an impact strength of at least 30 Kgm/cm in the hardened and tempered condition.
5. A steel as claimed in claim 1 consisting essentially of 0.06 percent carbon, 0.21 percent silicon, 0.40 percent manganese, 0.010 percent phosphorus, 0.008 percent sulphur, 9.22 percent nickel, 0.045 percent aluminum, 0.0l3 percent nitrogen balance iron and incidental impurities.
6. A steel as claimed in claim 1 consisting essentially of 0.05 percent carbon, 0.18 percent silicon, 0.42 percent manganese, 0.011 percent phosphorus, 0.005 percent sulphur, 9.20 percent nickel, 0.043 percent aluminum, 0.015 percent nitrogen balance iron and incidental impurities.
7. A steel as claimed in claim 2 consisting essentially of 0.06 percent carbon, 0.21 percent silicon, 0.40 percent manganese, 0.010 percent phosphorus, 0.008 percent sulphur, 9.22 percent nickel, 0.045 percent aluminum, 0.013 percent nitrogen balance iron and incidental impurities.
8. A steel as claimed in claim 2 consisting essentially of 0.05 percent carbon, 0. 18 percent silicon, 0.42 percent manganese, 0.011 percent phosphorus, 0.005 percent sulphur, 9.20 percent nickel, 0.043 percent aluminum, 0.015 percent nitrogen balance iron and incidental impurities.
9. A steel as claimed in claim 3 consisting essentially of 0.06 percent carbon, 0.21 percent silicon, 0.40 percent manganese, 0.010 percent phosphorus, 0.008 percent sulphur, 9.22 percent nickel, 0.045 percent aluminum, 0.013 percent nitrogen balance iron and incidental impurities. 7
10. A steel as claimed in claim 3 consisting essentially of 0.05 percent carbon, 0.18 percent silicon, 0.42 percent manganese, 0.011 percent phosphorus, 0.005 percent sulphur, 9.20 percent nickel, 0.043 percent aluminum, 0.015 percent nitrogen balance iron and incidental impurities.
11. A steel as claimed in claim 4 consisting essentially of TABLE I I 55 0.06 percent carbon, 0.21 percent silicon, 0.40 percent manganese, 0.010 percent phosphorus, 0.008 percent sulphur, C Si P S M N 9.22 percent nickel, 0.045 percent aluminum, 0.013 percent Q06 0 40 0.010 (1008 22 [1045 M13 nitro en balance iron and incidental im urities Contents g P 1 3 42 w ll. 9 will? -1 As la slaimeqm am! s qns essemlally of TABLE II Tensile test Impact test Plate Tensile thickness Yield point strength Elongation vE 0 vii-196* gauge (mm.) Heat treatment (kg/mm?) (kgJmmfl) (percent) (kgmJcmfi) (kgrnJcmJ) 15 {Normalizing and tempering 56 72 39 24 12 Hardening and temperlng... 69 76 37 23 20 Normalizing and tempering. 54 71 39 28 15 Hardening and tempering-.. 67 74 38 28 NorE.* vE 0" denotes an impactxa lge at 0 gfv lfllz stands for Yr otch notched on test piece. E stands for energy.
From the above example, it will be seen that the steel of the present invention has comparable tensile properties to the known steels for use at low temperatures. The carbon and manganese contents have been reduced and the tensile 0.05 percent carbon, 0.18 percent silicon, 0.42 percent manganese, 0.011 percent phosphorus, 0.005 percent sulphur, 9.20 percent nickel, 0.043 percent aluminum, 0.015 percent nitrogen balance iron and incidental impurities.
strength characteristic has been maintained because of the 75 =r it t it
Claims (11)
- 2. A steel as claimed in claim 1 having a tensile strength of at least 72 Kg/mm2 and an impact strength of at least 24 Kgm/cm2 in the normalized and tempered condition.
- 3. A steel as claimed in claim 1 having a tensile strength of at least 71 Kg/mm2 and an impact strength of at least 28 Kgm/cm2 in the hardened and tempered condition.
- 4. A steel as claimed in claim 1 having a tensile strength of at least 74 Kg/mm2 and an impact strength of at least 30 Kgm/cm2 in the hardened and tempered condition.
- 5. A steel as claimed in claim 1 consisting essentially of 0.06 percent carbon, 0.21 percent silicon, 0.40 percent manganese, 0.010 percent phosphorus, 0.008 percent sulphur, 9.22 percent nickel, 0.045 percent aluminum, 0.013 percent nitrogen balance iron and incidental impurities.
- 6. A steel as claimed in claim 1 consisting essentially of 0.05 percent carbon, 0.18 percent silicon, 0.42 percent manganese, 0.011 percent phosphorus, 0.005 percent sulphur, 9.20 percent nickel, 0.043 percent aluminum, 0.015 percent nitrogen balance iron and incidental impurities.
- 7. A steel as claimed in claim 2 consisting essentially of 0.06 percent carbon, 0.21 percent silicon, 0.40 percent manganese, 0.010 percent phosphorus, 0.008 percent sulphur, 9.22 percent nickel, 0.045 percent aluminum, 0.013 percent nitrogen balance iron and incidental impurities.
- 8. A steel as claimed in claim 2 consisting essentially of 0.05 percent carbon, 0.18 percent silicon, 0.42 percent manganese, 0.011 percent phosphorus, 0.005 percent sulphur, 9.20 percent nickel, 0.043 percent aluminum, 0.015 percent nitrogen balance iron and incidental impurities.
- 9. A steel as claimed in claim 3 consisting essentially of 0.06 percent carbon, 0.21 percent silicon, 0.40 percent manganese, 0.010 percent phosphorus, 0.008 percent sulphur, 9.22 percent nickel, 0.045 percent aluminum, 0.013 percent nitrogen balance iron and incidental impurities.
- 10. A steel as claimed in claim 3 consisting essentially of 0.05 percent carbon, 0.18 percent silicon, 0.42 percent manganese, 0.011 percent phosphorus, 0.005 percent sulphur, 9.20 percent nickel, 0.043 percent aluminum, 0.015 percent nitrogen balance iron and incidental impurities.
- 11. A steel as claimed in claim 4 consisting essentially of 0.06 percent carbon, 0.21 percent silicon, 0.40 percent manganese, 0.010 percent phosphorus, 0.008 percent sulphur, 9.22 percent nickel, 0.045 percent aluminum, 0.013 percent nitrogen balance iron and incidental impurities.
- 12. A steel as claimed in claim 4 consisting essentially of 0.05 percent carbon, 0.18 percent silicon, 0.42 percent manganese, 0.011 percent phosphorus, 0.005 percent sulphur, 9.20 percent nickel, 0.043 percent aluminum, 0.015 percent nitrogen balance iron and incidental impurities.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4879369 | 1969-06-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3656942A true US3656942A (en) | 1972-04-18 |
Family
ID=12813094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US47155A Expired - Lifetime US3656942A (en) | 1969-06-21 | 1970-06-17 | Steel for low-temperature service |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3656942A (en) |
| CH (1) | CH520777A (en) |
| DE (1) | DE2030413A1 (en) |
| FR (1) | FR2052822A5 (en) |
| GB (1) | GB1280268A (en) |
| NL (1) | NL7008752A (en) |
| ZA (1) | ZA704083B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT387985B (en) * | 1980-10-16 | 1989-04-10 | Arbed | Process for producing rolling steel |
| CN114134293B (en) * | 2021-09-23 | 2024-02-09 | 江阴兴澄特种钢铁有限公司 | Preparation method of 9Ni steel for low-segregation LNG ship |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3444011A (en) * | 1963-11-18 | 1969-05-13 | Yawata Seitetsu Kk | Low-temperature tough steel |
| US3496034A (en) * | 1966-02-21 | 1970-02-17 | United States Steel Corp | Steel resistant to embrittlement by neutron radiation |
-
1970
- 1970-06-12 GB GB28535/70A patent/GB1280268A/en not_active Expired
- 1970-06-15 ZA ZA704083A patent/ZA704083B/en unknown
- 1970-06-16 NL NL7008752A patent/NL7008752A/xx unknown
- 1970-06-17 US US47155A patent/US3656942A/en not_active Expired - Lifetime
- 1970-06-19 CH CH935170A patent/CH520777A/en not_active IP Right Cessation
- 1970-06-19 DE DE19702030413 patent/DE2030413A1/en active Pending
- 1970-06-19 FR FR7022701A patent/FR2052822A5/fr not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3444011A (en) * | 1963-11-18 | 1969-05-13 | Yawata Seitetsu Kk | Low-temperature tough steel |
| US3496034A (en) * | 1966-02-21 | 1970-02-17 | United States Steel Corp | Steel resistant to embrittlement by neutron radiation |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2052822A5 (en) | 1971-04-09 |
| GB1280268A (en) | 1972-07-05 |
| ZA704083B (en) | 1971-03-31 |
| CH520777A (en) | 1972-03-31 |
| DE2030413A1 (en) | 1971-04-08 |
| NL7008752A (en) | 1970-12-23 |
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