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 111811303316
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 630*80
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???????????45#?????????????????630*80???и?

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45??
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45???
?????????0.42-0.50%????????????0.17-0.37%????????????0.50-0.80%???????????<=0.035%???????????<=0.035%???????????<=0.25%???????????<=0.2545??
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δ??????229HBS
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??756mm?????100mm????
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45#?????????(????????)(%)
45
C
Si
Mn
Cr
Ni
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0.42-0.50
0.17-0.37
0.50-0.80
0.25
0.30
0.25

45#?????????????
168*17
245*44
245*8
273*30
245*12
299*31
245*14
299*32
245*16
325*40
245*25
351*30
245*30
377*30
245*40
 
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