Seamless precision tube can be made from hot pierced blank pipes or hot rolled seamless pipes through cold rolling or cold drawing. In our plant, we use hot pierced blank pipes to produce small size tubes with OD below 50mm through cold drawing or cold rolling. For bigger sizes upto 325mm in OD, we use hot rolled seamless pipes as raw material and achieve the finished size though hydraulic cold drawing.
Parameters of precision tube or mechanical tube we manufacture:
1. Type: Seamless(CDS), Welded(DOM/CDW)
2. Size range: 10mm(OD)*1mm(W.T)-325mm(OD)*35mm(W.T), including imperial sizes.
3. Typical steel grades: various carbon steel and alloy steel:
| Seamless Tube(CDS) | ASTM A519: | SAE 1010, 1020, 1026, 1045, 1518, 1524, 1541, 4130, 4140, 4145, 4340 |
| EN 10305-1: | E195, E235, E355, C45E, 42CrMo4 |
| DIN 2391-2: | ST35, ST45, ST52 |
| GB/T 3639: | 10#, 20#, 45#, 45#, 27SiMn, Q345B, |
| Welded Tube (CDW Tube) | ASTM A512/A513: | 1010,1020,1524 |
| EN 10305-2: | E195, E235, E275, E355 |
| DIN 2393-2: | ST34.2, ST37.2, ST44.2, ST52.3 |
4. Delivery Condition:
| +C | +LC | +SR | +A | +N | Q+T |
| BK | BKW | BKS | GBK | NBK | Q+T |
| Cold drawn(hard) | Cold drawn(Soft) | Stress relieved | Annealed | Normalized | Quenched+Tempered |
