15-5PH Stainless Steel per ABS 5750
15-5PH per ABS 5750 TECHNICAL INFORMATION. 15-5PH stainless steel (S15500) is a variant of the older 17-4PH (S17400) chromium-nickel-copper precipitation hardening stainless steel. Both alloys exhibit high strength and moderate corrosion resistance. High strength is maintained to approximately 600°F (316°C).