1. Commodity: ST52 E355 cold drawn seamless honed steel tube
2. Specification&steel grade: DIN 2391-2 ST52, EN 10305-1 E355,C45E, E410,E470,20MnV6,ASTM A519 1020,1026,1045.
3. Size range:40mm*30mm-325mm*300mm
4. Manufacture method: Hydraulic cold drawn, Cold rolled, hot rolled+deep hole bored.
5. Delivery Condition: As rolled, cold finished without final heat treating,Stress relieved,Annealed,Normalized.
6. Bore treatment: honing, skiving&roller burnishing
7. Bore roughness: Ra0.25um or Ra0.35um max
8. ID tolerance: H8 or H9
9. Straightness: 0.8mm/1000mm max
10. End finish: plain ends with square cuts,free of burrs.
11. Packing: in bundles tied with steel strips. Int&ext oil coating. End plastic caps.