臺(tái)州SCM420高淬透性合金鋼圓棒物理性能
特性及適用范圍:
SCM420合金結(jié)構(gòu)鋼淬透性較高,無(wú)回火脆性,焊接性相當(dāng)好,形成冷裂的傾向很小,可切削性及冷應(yīng)變塑性良好。SCM420一般在調(diào)質(zhì)或滲碳淬火狀態(tài)下使用,用于制造在非腐蝕性介質(zhì)及工作溫度低于250℃、含有氮?dú)浠旌衔锏慕橘|(zhì)中工作的高壓管及各種緊固件、較高級(jí)的滲碳零件,如齒輪、軸等。
化學(xué)成份(單位%):
碳C:0.18~0.23硅
Si:0.15~0.35錳 
Mn:0.60~0.90硫 
S:允許殘余含量≤0.030磷 
P:允許殘余含量≤0.030鉻
Cr:0.90~1.20鎳 
Ni:允許殘余含量≤0.25銅
Cu:允許殘余含量≤0.30鉬 
Mo:0.15~0.25
力學(xué)性能:抗拉強(qiáng)度σb(MPa):≥885(90)
屈服強(qiáng)度σs(MPa):≥685(70)
伸長(zhǎng)率δ5(%):≥12
斷面收縮率ψ(%):≥50
沖擊功Akv(J):≥78
沖擊韌性值αkv(J/cm&sup2):≥98(10)
硬度:≤197HB
試樣尺寸:試樣毛坯尺寸為15mm熱處理規(guī)范及金相組織:熱處理規(guī)范:淬火880℃,水冷、油冷回火500℃,水冷、油冷。
交貨狀態(tài):以熱處理(正火、退火或高溫回火)或不熱處理狀態(tài)交貨,交貨狀態(tài)應(yīng)在合同中注明。
20Cr,5120,SCr420,35Cr,SCr435,37Cr4,5135,40Cr,SCr440,41Cr4,5140,15CrMo,SCM415,13CrMo4-5,20CrMo,SCM418,18CrMo4,25CrMo4,20CrMnMo,20MnCr5,4320H,4118H,8520H,20CrNiMo,805M20,20NCD2,8720,20CrNiMo2,1.6523,70M40,EN41B,B5F4K2,EN-19C,35CrMo,SCM435,4137,34CrMo4,1.7220,35CrMoV,31CrMoV9,42CrMo,SCM440,SCM420,SCM421,SCM425,SCM430,8620,SCM432,SCM445,SCM822,SCM445,4170,42CrMo4,1.7225,4140,40CrMnMo,42CrMoA,38CrMoAL,SACM645,34CrALMo5,41CrALMo7,1.8509,20CrMnTi,40CrNIMoA,SNCM432,4340,36CrNiMo4,1.6511,40CrH,4130,16Mn,T10,30CrMo,SCM430,16MnCr5,16MnCr5H,SMnC420,5120H,17CrNiMo6,34CrNiMo6,18CrNiMo7-6,50CrVA,SUP10,SUP9,6150,51CrV4,1.8759,60Si2Mn,65Mn,1065,1050,1070,9260,61SiCr7,1.7108,60Si2MnA,50CrV4,SK3,SK4,SK5,SK7,SUJ2,GCr15,52100,100Cr6,9Cr18MoV,SUS440C,GCr15SiMo,GCr15SiMn,SNCM420,SNCM220,S44004,X108CrMo17,SMn420,SMn433,SMn438,SMn443,SCr415,SCr420,SCr430,SCr440,SCr445,SNC236,SNC415,SNC631,SNC815,SNC836,SNCM415,SNCM431,SNCM21,SNCM420,SNCM220,SNCM439,SNCM447,SNCM616,SNCM625,SNCM630,SNCM815,SACM645
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