AUSTENITIC HIGH MN STAINLESS STEEL AND METHOD PRODUCTION OF SAME AND MEMBER USING THAT STEEL
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Accused Products
Abstract
Inexpensive stainless steel and inexpensive and high strength stainless steel which has excellent hydrogen environment embrittlement resistance even if used in a hydrogen resistant environment in over 40 MPa high pressure hydrogen gas or a hydrogen resistant environment in liquid hydrogen, characterized by containing, by mass %, C: 0.1% or less, Si: 0.4 to 1.5%, Mn: 8 to 11%, Cr: 15 to 17%, Ni: 5 to 8%, Cu: 1 to 4%, and N: 0.01 to less than 0.15% and having a balance of Fe and unavoidable impurities, having a volume rate of δ-ferrite of 10% or less, and having a long axis of δ-ferrite before annealing of 0.04 to 0.1 mm.
18 Citations
34 Claims
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1-14. -14. (canceled)
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15. Austenitic high Mn stainless steel characterized by containing, by mass %, C:
- 0.1% or less, Si;
0.4 to 1.5%, Mn;
8 to 11%, Cr;
15 to 17%, Ni;
5 to 8%, Cu;
1 to 4%, Mo;
0.05 to 0.3%, and N;
0.01 to less than 0.15% and having a balance of Fe and unavoidable impurities, having a volume rate of δ
-ferrite of 5% or less, and having a long axis of δ
-ferrite of 0.05 mm or less. - View Dependent Claims (17, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 30, 33)
- 0.1% or less, Si;
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16. Austenitic high Mn stainless steel characterized by containing, by mass %, C:
- 0.1% or less, Si;
0.4 to 1.5%, Mn;
8 to 11%, Cr;
15 to 17%, Ni;
6 to 8%, Cu;
1 to 4%, Mo;
0.05 to 0.3%, and N;
0.15 to 0.3% and having a balance of Fe and unavoidable impurities, having a volume rate of δ
-ferrite of 5% or less, and having a long axis of δ
-ferrite of less than 0.05 mm. - View Dependent Claims (18, 29, 31, 32, 34)
- 0.1% or less, Si;
Specification