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GBT K409

Chemical composition(mass fraction)(wt.%)

Chemical composition(mass fraction)(wt.%)
C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Mo(%) Co(%) B(%) Al(%) Ti(%) Ta(%) Other(%)
0.08-0.13 Max 0.5 Max 0.5 Max 0.015 Max 0.01 7.50-8.50 Balance 5.75-6.25 9.50-10.5 0.10-0.20 5.75-6.25 0.80-1.20 4.00-4.50 Zr: 0.05-0.10