Hardening Steel
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Standard: ASTM A182; Grade: 254SMO, 17-4PH; Application Petroleum and Petrochemical Equipment; Pulp and Paper Equipment; Power Plant Flue Gas Desulfurization Devices; Marine Equipment or Sea Water Treatment; Mechanical Shafts, Turbines, Gears, Gauges, Medical Tools, Oil drilling. |
Chemical Composition Wt.%
Physical Constants
| Main Steel Grade | C | Cr | Ni | Mo | Si | Mn | P | S | Cu | N | |
| 254SMO (S31254) | ≤ 0.02 |
19.5 20.5 |
17.5 18.5 |
6 6.5 |
≤ 0.8 |
≤ 1 |
≤ 0.03 |
≤ 0.01 |
0.5 1 |
0.18 0.22 |
Fe rest |
| 17-4PH (1.4542) | ≤ 0.07 |
15 17.5 |
3 5 |
≤ 1 |
≤ 1 |
≤ 0.04 |
≤ 0.03 |
3 5 |
Nb 0.15 0.45 |
Physical Constants
| Main Steel Grade | Density (g/cm3) | Melting Point ℃ | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation % |
| 254SMO | 8.24 | 1320-1390 | 690 | 310 | 35 |