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17-4PH / 630 Age-hardening stainless steel round bar, hot-rolled or -forged Standards of 17-4PH : ASTM A693 grade 630 (AMS 5604B) UNS S17400 EURONORM 1.4542 X5CrNiCuNb 16-4 AFNOR Z5 CNU 17-4PH DIN 1...