China 1.7218 25crmo4 30CrMo AISI 4130 Alloy Steel, Find details about China Steel Tube, Seamless Pipe from 1.7218 25crmo4 30CrMo AISI 4130 Alloy Steel
Standard specification: EN10305-1 25CrMo4,34CrMo4,42CrMo4,and equivalent standard&grades like ASTM A519 SAE4130,SAE4140,SAE4145,etc.
Size range:70mm*60mm*325mm*300mm
Manufacture method: Hydraulic cold drawn
Delivery condition:BKS,BKW,GBK,NBK.
Bore treatment: honing or skiving&roller burnishing
ID tolerance: H8, H9, or as per customer's requirement
Roughness of internal surface: 0.35um max.
Straightness:0.5mm/1000mm max.