1. Commodity: Cold drawn seamless honed steel tube
2. Steel Grade:
| SAE/AISI: | 1020,1026,1045,1518,1524,1541,4130,4140,4145,4340 |
| EN: | E355,E410,E470,C45E,20MnV6,CK45 |
| DIN: | ST45,ST52,ST52.4 |
| JIS: | STKM 13A, STKM 13B,STKM 13C |
| GB: | 20#,45#,16MN,25Mn, |
3. Size range: 40mm*30mm-325mm*300mm
4. Manufacture method: hydraulic cold drawn, cold rolled, hot rolled+deep hole boring
5. Delivery Condition:As rolled, Stress relieved，Annealed,Quenched+Tempered.
6. Bore treatment: Honing,skiving&roller burnishing
7. Bore roughness: Ra0.25um or Ra0.35um max at the option of the buyer.
8. ID tolerance: H8 or H9 at the option of the buyer.