Claims
- 1. A ferritic stainless steel having an excellent formability, which consists essentially of:
- 0.04% to 0.1% by weight of carbon,
- 1.0% by weight or less of silicon,
- 0.75% by weight of less of manganese,
- 10% to 30% by weight of chromium,
- 0.5% by weight or less of nickel,
- 0.0102% to 0.025% by weight of nitrogen,
- 2 to 30 ppm of boron, and
- the balance consisting of iron and unavoidable impurities, the sum of the contents of nitrogen and carbon being 0.0502 % by weight or more.
- 2. The ferritic stainless steel as claimed in claim 1, wherein the content of nitrogen is up to 0.014% by weight, and the content of carbon is up to 0.07% by weight.
- 3. The ferritic stainless steel as claimed in claim 1, wherein the content of silicon is 0.20% to 0.90% by weight, the content of manganese is 0.05% to 0.65% by weight, the content of nickel is 0.01% to 0.30% by weight, and the content of boron is 5 to 25 ppm.
- 4. The ferritic stainless steel as claimed in claim 1, which contains an additional alloy component consisting of from 0.005% to 0.4% by weight of aluminum.
- 5. The ferritic stainless steel as claimed in claim 4, which contains a further alloy component consisting of at least one number selected from the group consisting of 0.005% to 0.6% by weight of titanium, 0.005% to 0.4% by weight of niobium, 0.005% to 0.4% by weight of vanadium, 0.005% to 0.4% by weight of zirconium, 0.02% to 0.50% by weight of copper, 0.05% by weight or less of calcium, and 0.05% by weight or less of cerium.
Priority Claims (1)
Number |
Date |
Country |
Kind |
55-24638 |
Mar 1980 |
JPX |
|
Parent Case Info
This is a continuation-in-part application from the application, Ser. No. 238,359, filed on Feb. 25, 1981, and now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (2)
Number |
Date |
Country |
55-717 |
Jan 1977 |
JPX |
2071148 |
Sep 1981 |
GBX |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
238359 |
Feb 1981 |
|