Duplex stainless steel
AssigneeSandvik Intellectual Property AB
InventorsTomas Antonsson, Lars Nylöf
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a duplex stainless steel comprising in weight % (wt %): C less than 0.03; Si less than 0.60; Mn 0.40 to 2.00; P less than 0.04; S less than or equal to 0.01; Cr more than 30.00 to 33.00; Ni 6.00 to 10.00; Mo 1.30 to 2.90; N 0.15 to 0.28; Cu 0.60 to 2.20; Al less than 0.05; balance Fe and unavoidable impurities. The present disclosure also relates to a component or a construction material comprising the duplex stainless steel. Additionally, the present disclosure also relates to a process for manufacturing a component comprising said duplex stainless steel.
Claims26
A duplex stainless steel comprising in weight % (wt %):
- C
- less than 0.03;
- Si
- less than 0.60;
- Mn
- 0.40 to 2.00;
- P
- less than 0.04;
- S
- less than or equal to 0.01;
- Cr
- more than 30.00 to 33.00;
- Ni
- 6.00 to 10.00;
- Mo
- 1.30 to 2.90;
- N
- 0.15 to 0.28;
- Cu
- 0.60 to 2.20;
- Al
- less than 0.05;
- balance Fe and unavoidable impurities,
- wherein said duplex stainless steel has a ferrite content of from 40 to 70 vol % and a balance is austenite,
- wherein said duplex stainless steel has a CPT of greater than or equal to 50° C. and equal to or less than 65° C., where CPT is determined according to the G48A method, and
- wherein said duplex stainless steel has a yield strength Rp0.2 of greater than 610 MPa determined by ASTM A-370.
A duplex stainless steel comprising in weight % (wt %):
- C
- less than 0.03;
- Si
- less than 0.60;
- Mn
- 0.60 to 1.80;
- P
- less than 0.04;
- S
- less than or equal to 0.01;
- Cr
- more than 30.00 to 32.50;
- Ni
- 6.50 to 9.50;
- Mo
- 1.40 to 2.80;
- N
- 0.17 to 0.25;
- Cu
- 0.60 to 1.90;
- Al
- less than 0.03;
- balance Fe and unavoidable impurities,
- wherein said duplex stainless steel has a ferrite content of from 40 to 70 vol % and a balance is austenite,
- wherein said duplex stainless steel has a CPT of greater than or equal to 50° C. and equal to or less than 65° C., where CPT is determined according to the G48A method, and
- wherein said duplex stainless steel has a yield strength Rp0.2 of greater than 610 MPa determined by ASTM A-370.
Dependencies are inferred from the claim text.