China · GB
E5540-2CMWVB
GB/T 5118:2012 — Low alloy steel covered electrodes
Chemical composition
wt% · log scale- min – max range
- typical value
Mechanical properties
value range by conditionChemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| B | 0.001 | 0.003 | ||
| C | 0.05 | 0.12 | ||
| Cr | 1.5 | 2.5 | ||
| Mn | 1 | |||
| Mo | 0.3 | 0.8 | ||
| P | 0.6 | |||
| S | 0.03 | |||
| Si | 0.03 | |||
| V | 0.2 | 0.6 | ||
| W | 0.2 | 0.6 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| electrodes | ≥460 | ≥550 | ≥14 |
Heat treatment
| Type | 3 | 4 |
|---|---|---|
| Heat-treatment process | Heat treatment | 745℃~775℃ Holding 120min |