Ss 630 plates are heated at 1040°C for 0.5 h, then air-cooled to 30°C. Small sections of these grades can be oil quenched.
Ss 630 plates are age-hardened at low temperatures to achieve the required mechanical properties. During the process, superficial discoloration occurs followed by Ss 630 plates shrinkage at 0.10% for condition H1150, and 0.05% for condition H900.
| Grade | C | Si | Mn | P | S | Cr | Ni | Cu | Nb |
| 17-4PH | 0.07 | 1.00 | 1.00 | 0.040 | 0.030 | 15.00~17.50 | 3.00~5.00 | 3.00~5.00 | 0.15~0.45 |
This versatile material is widely used in the aerospace, chemical, petrochemical, food processing, paper
and general metalworking industries.
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