Stainless Steel Alloy 630, also known as 17-4, is the most common chromium-copper precipitation hardening PH stainless steel. 630 Stainless Steel is a martensitic stainless steel that offers superior corrosion resistance widely used for applications requiring high strength and a moderate level of corrosion resistance.
Chemical composition of 1.4542
| Cr | 15,0 - 17,0 |
| Ni | 3,0-5,0 |
| Cu | 3,0-5,0 |
| C | max 0,070 |
After hardening heat remedy, machining is troublesome however possible. Then the component must be precipitation hardened to realize the required mechanical properties. Cold forming corresponding to rolling, bending and hydroforming may be performed on 17-4PH but only within the absolutely annealed situation. After chilly working, stress corrosion resistance is improved by re-ageing at the precipitation hardening temperature. Due to the high power of precipitation hardening stainless steels, most functions are in aerospace and different high-know-how industries.
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