ASTM634
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.10 | 0.15 | ||
| Si | - | 0.50 | ||
| Mn | 0.50 | 1.25 | ||
| P | - | 0.04 | ||
| S | - | 0.03 | ||
| Cr | 15.0 | 16.0 | ||
| Ni | 4.00 | 5.00 | ||
| Mo | 2.50 | 3.25 | ||
| N | 0.07 | 0.13 |
ASTM634
| Proof strength Rp0.2 (MPa) |
Tensile strength Rm (MPa) |
Impact energy KV (J) |
Elongation at fracture A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 256 (≥) | 921 (≥) | 31 | 32 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 442 |
| Property | Density kg/dm3 |
Temperature T °C/F |
Specific heat J / kgK |
Thermal conductivity W/mK |
Electric resistance µΩ·cm |
Modulus of elasticity kN/mm2 |
Expansion rate |
|---|---|---|---|---|---|---|---|
| 683 (≥) | 312 (≥) | 21 | 42 | 12 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 223 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 779 | 369 | 873 |
We can customize the production of ASTM634 grade, contact us for the best solution.
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