1. Outer diameter: 6mm -60mm 2. Wall thickness: 1-12mm3. Material: ST52, Q345B, CK20, CK45, SAE1026, STKM 11A 13A.....4. Standard: JIS G34455. Application: Carbon steel tubes used for machinery, automobile bicycles, furniture, appliance and other machine parts.6. Steel Grade: STKM 11A/12A/12B/12C/13......
| Mechanical Property | |||
| Delivery Condition | BKS Cold Drawn & Stress-Relieved | ||
| Steel Grade | Rm MPa | ReH MPa | Elongation A5(%) |
| ST45 | ≥520 | ≥375 | ≥15 |
| ST52(E355) | ≥600 | ≥520 | ≥14 |
| SAE1026 | ≥600 | ≥510 | ≥15 |
| 45# | ≥600 | ≥520 | ≥10 |
| 20# | ≥520 | ≥375 | ≥15 |
| Mechanical Properties | ||
| Steel Grade | Tensile Strength(N/mm²) | Yield Strength(N/mm²) |
| STKM11A | ≥290 | - |
| STKM12A | ≥340 | ≥175 |
| STKM12B | ≥390 | ≥275 |
| STKM12C | ≥470 | ≥355 |
| STKM13A | ≥370 | ≥215 |
| STKM13B | ≥440 | ≥305 |
| STKM13C | ≥510 | ≥380 |
| STKM14A | ≥410 | ≥245 |
| STKM14B | ≥500 | ≥355 |
| STKM14C | ≥550 | ≥410 |
| STKM15A | ≥470 | ≥275 |
| STKM15C | ≥580 | ≥430 |






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