●SUH661化学成分:
锰 Mn:1.00~2.00
磷 P:≤0.040
硫 S:≤0.030
铬 Cr:20.00~22.50
钼 Mo:2.50~3.50
镍 Ni:19.00~21.00
铜 Cu:—
钨 W:2.00~3.00
钴 Co:18.50~21.00
氮 N:0.10~0.20
铌 Nb:0.75~1.25
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