???????:??????????76???????.
?????????б??
1????????????GB8162-2008 2?????????????????GB8163-20083??3?????????????????GB3087-2008 4??????????????GB5310-2008??ST45.8-????? 5???????豸??????????GB6479-1999 6?????????????????YB235-70 7????????????????YB528-65 8????????????????GB9948-88 9?????????????????YB691-70 10??????????????????GB3088-1999 11??????????????GB5312-1999 12???????????????????GB3639-1999 13?????????16Mn??27SiMn??15CrMo??35CrMo??12CrMov??20G??40Cr,12Cr1MoV,15CrMo??
????????GB/T17396-1998?????????????????????GB3093-1986???????????????????GB/T3639-1983????λ?????????????????GB/T3094-1986?????????????θ?????GB/T8713-1988???????????????????????????GB13296-1991???????????????ò????????????GB/T14975-1994?????ò????????????GB/T14976-1994???????????ò??????????GB/T5035-1993???????????????????????API SPEC5CT-1999???????й?淶?????
????????????????:[(??-???)*???]*0.02466=kg/??(????????)
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