牌号 (grade)
材料号 (material no.)
化学含量 (chemical elements contents) %
mo
si (max)
c (max)
s (max)
p (max)
cu (max)
femo70
0.4270
69-75
1.0
0.10
0.50
femo62
0.4262
58-65
2.0
0.06