Claims
- 1. A high strength steel product produced by hot rolling and so produced, having yield strength of at least 80 ksi, transverse and longitudinal bendability each with inside radius of bend at least as small as 2T, and transverse-to-longitudinal CVN impact strength ratio greater than 0.45, said steel being aluminum-killed and consisting essentially of 0.03 to 0.06% C, 0.3 to 0.5% Mn, 0.02 to 0.15% Cb, 0.10 to 0.20% V, 0 to less than 0.2% Si, the total of Cb and V being at least 0.18%, 0.01 to 0.2% Al, and from 0 to the following maximum percentages of the following elements: 0.03 max. P, 0.03 max. S, 0.025 max. N, balance iron and incidental elements.
- 2. A steel product as defined in claim 1, which contains 0.045 to 0.06% C and 0.3 to 0.45% Mn.
- 3. A steel product as defined in claim 2, which contains from 0 to the following maximum percentages of the following elements: 0.015 max. P, 0.01 max. N.
- 4. A steel product as defined in claim 1, which contains 0 to 0.1% Si and 0.01 to 0.09% Al.
- 5. A steel product as defined in claim 1, which contains 0.045 to 0.6% C, 0.07 to 0.15% Cb, and a total of Cb and V of at least 0.22%.
- 6. A steel product as defined in claim 5, which contains 0.3 to 0.45% Mn.
- 7. A steel product as defined in claim 6, which contains 0.01 to 0.1% Si, and from 0 to the following maximum percentages of the following elements: 0.015 max. P, 0.02 max. S, 0.01 max. N.
- 8. A steel product as defined in claim 1, which contains 0.003 to 0.01% N.
Parent Case Info
This is a continuation, of application Ser. No. 727,126 filed Sept. 27, 1976, now abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3674570 |
Hallstrom et al. |
Jul 1972 |
|
3721587 |
Allten et al. |
Mar 1973 |
|
3725049 |
Satoh et al. |
Apr 1973 |
|
3997372 |
Matas et al. |
Dec 1976 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
1007175 |
Oct 1965 |
GBX |
1058146 |
Feb 1967 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Heitmann et al.; "Development of a Formable, Low Carbon Columbrium Bearing High Strength Hot Rolled Sheet Steel;" Soc. Aut Eng., 3/74. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
727126 |
Sep 1976 |
|