We are professional High Precision cold drawn seamless honed Tubes factory from china
Grade: ST52,ST52.3,CK45,Q345B,EN355,16Mn,STKM13C,SAE1020/1026/4140,42CrMo,TP304/316 etc.
OD metric size: 30 to 2000 mm
OD imperial size: 1.5" to 50" (inch)
Length: max 20 Meter
Straightness: <0.5 mm/m
Tolerance OD: DIN 2391
Tolerance ID: ISO H8, H9, H10
Roughness(Ra): <0.8
Type: BK+S,high precision cold drawn,seamless honed,burnished