17-4 stainless steel bar, also known as UNS S17400, 17-4 PH and Grade 630, is one of the original precipitation hardened grades developed in the 50’s. Primarily comprised of 17% chromium, 4% nickel, 4% copper, with the balance being iron.
| Cr | 15,0 - 17,0 |
| Ni | 3,0-5,0 |
| Cu | 3,0-5,0 |
| C | max 0,070 |
Stainless Steel Alloy 630 Chemical Composition
Nippon Yakin GradeNAS 630
UNSS17400
EN / DIN1.4542
JISSUS 630
Chemical Composition17Cr-4Ni-4Cu-0.2Nb
Welding of NAS 630 can be performed using various welding methods in the same manner as with standard type austenitic stainless steels. Maximum welding efficiency can be obtained by performing normal solution treatment + H900 treatment after welding.
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