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30Cr2Ni2Mo合金結(jié)構(gòu)鋼 ,特鋼優(yōu)質(zhì)合金鋼,是在優(yōu)質(zhì)碳素結(jié)構(gòu)鋼的基礎(chǔ)上,適當?shù)丶尤胍环N或數(shù)種合金元素而制成的鋼種。執(zhí)行標準JB/T6396—2006。 C:0.26~0.34, Si:0.17~0.37, Mn:0.30~0.60, Cr:1.80~2.20, Mo:0.30~0.50, Ni:1.8~2.20; 抗拉強度:MPa980, 屈服點:MPa835, 伸長率:%12, 斷面收縮率:%55, 沖擊吸收功:Ak78, 鋼材退火或高溫回火供應(yīng)狀態(tài)布氏硬度HBW小于等于269; 用作要求高強度、高韌性、截面尺寸較大的和較重要的調(diào)質(zhì)零件,如臥式鍛造機的傳動偏心軸、鍛壓機曲軸等。
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