GB1485455A - High strength low carbon steel and method of producing it - Google Patents
High strength low carbon steel and method of producing itInfo
- Publication number
- GB1485455A GB1485455A GB4150174A GB4150174A GB1485455A GB 1485455 A GB1485455 A GB 1485455A GB 4150174 A GB4150174 A GB 4150174A GB 4150174 A GB4150174 A GB 4150174A GB 1485455 A GB1485455 A GB 1485455A
- Authority
- GB
- United Kingdom
- Prior art keywords
- steel
- ksi
- period
- yield strength
- time sufficient
- 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
Links
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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
1485455 Nitrogen alloyed deep drawing steel ARMCO STEEL CORP 24 Sept 1974 41501/74 Heading C7A Cold reduced and annealed steel sheet stock of thickness 0À5 to 2À29 mm (0À02 to 0.09 inches) and average yield strength of at least 70 ksi(483 MN/m<SP>2</SP>; consisting of and sufficient nitrogen to combine substantially with the Ti and/or Nb and/or Zr, remainder iron and impurities. The steel may be produced by providing a deep drawing quality steel containing: C 0À002 to 0À015% N 2 0 to 0À012% Total Al 0 to 0À08% cold-rolling the steel to 0À5 to 2.29 mm, annealing and heating in an atmosphere of 2 to 10 volume per cent ammonia and hydrogen at 1100‹ to 1350‹F for a period of time sufficient to form small uniformly dispersed nitrides and to raise the yield strength to at least 70 ksi. The steel may be deep drawn prior to the nitriding treatment and may be subsequently denitrided in a hydrogen atmosphere at 1100 to 1350‹F for a period of time sufficient to decrease the ductile to brittle transition temperature to at least -60‹F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4150174A GB1485455A (en) | 1974-09-24 | 1974-09-24 | High strength low carbon steel and method of producing it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4150174A GB1485455A (en) | 1974-09-24 | 1974-09-24 | High strength low carbon steel and method of producing it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1485455A true GB1485455A (en) | 1977-09-14 |
Family
ID=10419986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4150174A Expired GB1485455A (en) | 1974-09-24 | 1974-09-24 | High strength low carbon steel and method of producing it |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1485455A (en) |
-
1974
- 1974-09-24 GB GB4150174A patent/GB1485455A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |