India · IS
Class 20
IS 4712:2009 — IS 4712
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.35 | |||
| Mn | 0.6 | 1.05 | ||
| P | 0.04 | |||
| S | 0.05 | |||
| Si | 0.35 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| fittings, Heat treated | ≥250 | ≥485 | ≥22 | HB ≤187 |