630 steel plates 630 is a precipitation hardening type of high strength stainless steel. 630 steel plates 630 has excellent corrosion resistance equivalent to that of 18-8 austenitic stainless steels, and also provides high strength equivalent to chromium stainless steels which have a quench-hardening capacity. 630 steel plates 630 is used in various parts in which high strength is required, such as steel belts, high strength mechanical parts, etc.
| Grade | C | Cu | Mn | Ni | Nb-Cb | Cr | Nb-Ta | P | Si | S | Fe | |
| 17-4 PH | min. | – | 3.0 | – | 3.0 | 0.15 | 15 | 0.15 | – | – | – | – |
| max. | 0.070 | 5.0 | 1.0 | 5.0 | 0.45 | 17.5 | 0.45 | 0.040 | 1.0 | 0.030 | 73 |
Physical properties according to EN 10088-1:
Heat capacity, cp20℃: 500 J * kg-1 * K-1
Heat conductivity, λ: 16 W * m-1 * K-1
Modulus of elasticity, E: 200 GPa
Density: 7.8 g/cm3
Linear Expansion Factor, α20℃: 10.9 * 10-6 K-1
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