玖玖玖国产精品视频_国产精品不卡片免费视频_久久精品人妻一区二区三区_国产午夜精品一区二区三区老

牌號

化學成分%

C

Si

Mn

S

P

Cr

10

0.07-0.13

0.17-0.37

0.35-0.65

≤0.035

≤0.035

20

0.17-0.23

0.17-0.37

0.35-0.65

≤0.035

≤0.035

35

0.32-0.39

0.17-0.37

0.35-0.65

≤0.035

≤0.035

45

0.42-0.50

0.17-0.37

0.50-0.80

≤0.035

≤0.035

40Cr

0.37-0.44

0.17-0.37

0.50-0.80

≤0.035

≤0.035

0.08-1.10

25Mn

0.22-0.29

0.17-0.37

0.70-1.00

≤0.035

≤0.035

≤0.25

37Mn5

0.30-0.39

0.15-0.30

1.20-1.50

≤0.015

≤0.020