产品特性:
具有中等强度,冷变形时塑性高,低温性能好,与相应含碳量的碳钢相比,其淬透性较高。一般用作较小截面的零件,与20Cr钢相当,可作渗碳小齿轮、小轴、钢套、活塞销、柴油机套筒、汽车转向滚轮轴、汽门顶杆等;也可作调质钢用,如冷镦螺栓或较大截面的调质零件
5保证淬透性结构(H)钢:SMn420H SMn433H SMn438H SMn443H SMnC420H SMnC443H SCr415H SCr420H
SCr430H SCr435H SCr440H SCM415H SCM418H SCM420H
SCM425H SCM435H SCM440H SCM445H SCM822H SNC415H SNC631H SNC815H SNCM220H
SNCM420H(
6易切削结构钢:SUM21 SUM22 SUM22L SUM23 SUM23L SUM24L SUM25 SUM31
SUM31L SUM32 SUM41 SUM42 SUM43