1.4971
X12CrNiCoMoWMnNNb 21-20-20-3-3-2; X12CrCoNi21-20
high temperature steel
Standards and designations
Material group
Stainless steel
AFNOR
R30155
AISI/SAE
661
Special designations
Alloy N-155; MULTIMET® alloy
Delivery forms
Round
X12CrNiCoMoWMnNNb 21-20-20-3-3-2; X12CrCoNi21-20
high temperature steel
Standards and designations
Delivery forms