NA 131
DIN Standards Committee Aerospace
Technical rule
[CURRENT]
WL 1.4957 Beiblatt 1
WL 1.4957 Beiblatt 1
Precipitation-hardening high temperature chromium-nickel-cobalt cast steel with about 0.15C-21Cr-20Ni-19Co; investment casting
Title (German)
Aushärtender hochwarmfester Chrom-Nickel-Kobalt-Stahlguß mit etwa 0,15C-21Cr-20Ni-19Co; Feinguß