China · GB
25
GB/T 13237:1991 — Cold-rolled quality carbon structural steel sheets and strips
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.22 | 0.29 | ||
| Cr | 0.25 | |||
| Cu | 0.25 | |||
| Mn | 0.5 | 0.8 | ||
| Ni | 0.3 | |||
| P | 0.035 | |||
| S | 0.035 | |||
| Si | 0.17 | 0.37 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| 0.6mm < t ≤ 1mm | 375–490 | ≥20 Lo=80 mm | ||||
| 1.5mm < t ≤ 2mm | 375–490 | ≥22 Lo=80 mm | ||||
| 1mm < t ≤ 1.5mm | 375–490 | ≥21 Lo=80 mm | ||||
| 2mm < t ≤ 2.5mm | 375–490 | ≥23 Lo=80 mm | ||||
| t > 2.5mm | 375–490 | ≥24 Lo=80 mm | ||||
| t ≤ 0.6mm | 375–490 | ≥18 Lo=80 mm |