United States · AISI
AISI H-21
ASTM A681:2008 — Standard Specification For Tool Steels Alloy(2015)
Chemical composition
wt% · log scale- min – max range
- typical value
Mechanical properties
value range by conditionChemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.26 | 0.36 | ||
| Cr | 3 | 3.75 | ||
| Mn | 0.15 | 0.4 | ||
| Ni+Cu | 0.75 | |||
| P | 0.03 | |||
| S | 0.03 | Where specified | ||
| Si | 0.15 | 0.5 | ||
| V | 0.3 | 0.6 | ||
| W | 8.5 | 10 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| bars, wire, Heat treated, HR | Plate 52 | |||||
| bars, HB, wire, cold drawn | Plate 262.00 | |||||
| bars, HB, wire, annealed | Plate 235.00 |