牌号\化学成分
c
mn
si
cr
mo
w
v
nb
hrc
d608
2.5-4.50
3.0-5.0
3.0-5.0
≥55
d618
≤3.0
15.0-20.0
1.0-2.0
10.0-20.0
≤1.00
≥58
d628
20.0-35.0
4.0-6.0
≤1.00
≥60
d632a
25.0-40.0
≥56
d638
25.0-40.0
≥60
d638nb
20.0-35.0
4.0-8.50
≥60
d642
≤1.5
22.0-32.0
≥45
d646
≤1.0
22.0-32.0
≥45
d656
≤1.5
≤2.5
26.0-34.0
2.0-3.0
≥45
d658
20.0-35.0
4.0-9.50
2.50-7.50
0.50-2.50
4.0-8.50
≥60
d667
≤8.0
1.0-4.8
25.0-32.0
ni 3-5
≥48
d678
8.0-10.0
≥50
d687
1.5-3.5
≤3.0
22.0-32.0
b 0.5-2.5
≥58
d698
≤3.0
4.0-6.0
8.5-14.0

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