Chemical Composition(%)
| Standard | Grade | Chemical Components (%) | |||||||
|
|
| C (Max) | Si(Max) | Mn | P | S | Mo | Cr | V |
| DIN2391 | ST52 | 0.22 | 0.55 | ≤1.60 | ≤0.025 | ≤0.025 | 0.90-1.20 | / | / |
Mechanical Properties
| Standard | Grade | Mechanical Properties（NBK) | ||
| Tensile Strength (Mpa) | Yield Strength (Mpa) | Elonga-tion (%) | ||
| DIN2391 | ST52 | 490-630 | ≥355 | ≥22 |
Cold Drawn Seamless Steel Pipe Delivery Condition
| Designation | Symbol | Description |
| Cold drawn/hard | +C | No heat treatment after the final cold drawing process |
| Cold drawn/soft | +LC | After the final heat treatment there is a suitable drawing pass |
| Cold drawn and stress relieved | +SR | After the final cold drawing process there is a stress relief heat treatment in a controlled atmosphere |
| Annealed | +A | After the final cold drawing process the tubes are annealed in a controlled atmosphere |
| Normalized | +N | After the final cold drawing operation the tubes are normalized in a controlled atmosphere |
Application
Cold Drawn Carbon steel seamless pipes are extensively applied in the nuclear device, gas conveyance, petrochemical, shipbuilding and boiler industries, with characteristics of high corrosion resistance combined with suitable mechanical properties. - Nuclear device - Gas conveyance - Petrochemical industries - Shipbuilding and boiler industries