批發SCM440圓棒

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SCM440合金鋼化學成份：?
??C 0.38-0.42?
??Si 0.15-0.35?
??Mn 0.60-0.85?
??P ≤0.03?
??S ≤0.03?
??Cu ≤0.30?
??Ni ≤0.25?
??Cr 0.90-1.20?
??MO 0.15-0.30?
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SCM440合金鋼性能：
?????1。淬火性好，可進行深度淬火，而不是市面上防鋸形鎖的表面淬火?
??2。對回火脆性傾向少
???? 3。高溫加工性好，加工后美觀?
??4。熔接性好?
??5。沖擊的吸收性能好，錘子砸上去會與反彈感，無法進行暴力破壞?
??優點： ??(1).加工性好 ??(2).沖擊的吸收性能好 ??(3).焊接容易?
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SCM440合金鋼用途：?
??SCM440是生產高強度緊固件的常用鋼種，產品具有成分穩定、有害元素低、鋼質純凈度高、脫碳層小，表面缺陷少等優點，使用時易進行球化退火、冷鐓開裂率低，熱處理質量穩定、硬度均勻，廣泛應用在發動機、模具等行業。

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合金結構鋼?1330H?1335H?1340H?1345H?4027H?4028H?4032H?4037H?4042H?4047H?4118H?4130H?4135H?4137H?
4140H?4142H?4145H?4147H?4150H?4161H?4320H?4340H?4340H?4419H?4620H?4621H?4626H?4718H?
4720H?4815H?4817H?4720H?50B40H?50B44H?5046H?50B46H?50B50H?50B60H?5120H?5130H?5132H?5135H?
5140H?5145H?5147H?5150H?5155H?5160H?51B60H?6118H?6150H?81B45H?8617H?8620H?8622H?8625H?
8627H?8630H?86B30H?8637H?8640H?8642H?8645H?86B45H?8650H?8655H?8660H?8720H?8740H?8822H?
9260H?9310H?94B15H?94B17H?94B30H?1038H?1045H?1522H?1524H?1526H?1541H?15B21H?15B35H?
15B37H?15B41H?15B48H?15B62H?SMn420，SMn433，SMn438，SMn443，SCr415，SCr420?，SCr430?，SCr440?，SCr445?，SCM415?，SCM418?，SCM420?，SCM421?，SCM425，SCM430，SCM432，SCM435，SCM440，SCM445，SCM822，SNC236，SNC415，SNC631，SNC815，SNC836，SNCM220，SNCM415，SNCM420，SNCM431，SNCM439，SNCM447，SNCM616，SNCM625，SNCM630，SNCM815，SACM645