United Kingdom · Lloyds
LR Type 420
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Chemical composition
wt% · log scale- min – max range
- typical value
Mechanical properties
value range by conditionChemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.45 | |||
| Cr | 0.4 | |||
| Cu | 0.3 | |||
| Mn | 0.3 | |||
| Mo | 0.15 | |||
| Ni | 0.4 | |||
| P | 0.035 | |||
| S | 0.035 | |||
| Si | 0.45 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| forgings, quenched and tempered | ≥420 | 600–750 | ≥18 long. test | HB 175–215 |