DIN 2391 standard for precision cold drawn seamless steel tube
Size(mm):
Out diameter:16-325
Wall thickness: 1-22
Length: Max:12000
Main application:
Hydraulic system with steel, automotive steel, widely used in the hydraulic system in steel tube, injection molding machine in steel tube, hydraulic press in steel tube, steel tube, EVA foam hydraulic machinery, precision hydraulic steel pipe cutting machine, shoe-making machinery, hydraulic equipment, high pressure tubing, hydraulic tubing, card sets of joints, pipe joints, rubber machinery, forging machinery, casting machinery, engineering machinery, automobile high pressure steel pipe concrete pump, sanitation vehicle, automobile industry, shipbuilding industry, metal processing, military industry, diesel engine, the internal combustion engine, air compressor, construction machinery, agricultural and forestry machinery, etc.
Chemical component(%)
| steel grade | C max | Si max | Mn | P max | S max |
| St35 | 0.17 | 0.35 | 0.40 | 0.025 | 0.025 |
| St45 | 0.21 | 0.35 | 0.40 | 0.025 | 0.025 |
| St52 | 0.22 | 0.35 | 1.60 | 0.025 | 0.025 |
Mechanical properties(Mpa)
| Delivery conditions | cold working(hard)BK | cold working(soft)BKW | Cold working and eliminate force BKS | annealing(GBK) | normalizing(NSK) |
| steel grade | / | / | / | / | / |
| St35 | TS:480 E:6 | TS:420 E:10 | TS:420 YS:315 E:14 | TS:315 E:25 | TS:340-470 YS:235 E:25 |
| St45 | TS:580 E:5 | TS:520 E:8 | TS:520 YS:375 E:12 | TS:390 E:21 | TS:440-570 YS:255 E:21 |
| St52 | TS:640 E:4 | TS:580 E:7 | TS:580 YS:420 E:10 | TS:490 E:22 | TS:490-630 YS:355 E:22 |
Remark: TS: Tensile Strength YS: Yield Strength E: Elongation
Post time: Oct-15-2019