Specification: AMS 5862, AMS 5659, AMS 5826, ASTM A 564, ASTM Sturmarbeiteilung 564, ASTM A 693,ASME Sturmarbeiteilung 693, ASTM A 705,ASME Sturmarbeiteilung 705
15-5PH Precipitation Hardening chrome steel Alloy (S15500) could be a variant of the older 17-4 hydrogen ion concentration (S17400) chromium-nickel-copper precipitation hardening chrome steel. each alloys exhibit high strength and moderate corrosion resistance. High strength is maintained to about 600°F (316°C). The 15-5 hydrogen ion concentration alloy was designed to own bigger toughness than 17-4 hydrogen ion concentration, particularly within the through-thickness (short transverse) direction. This improved toughness is achieved by reduced delta primary solid solution content and management of inclusion size and form. The composition and process of 15-5 hydrogen ion concentration alloy is rigorously controlled to reduce its content of delta primary solid solution, that is gift within the 17-4 hydrogen ion concentration chrome steel material. Inclusion management is finished by expendable conductor remelting victimization the electro-slag remelting (ESR) method. The 15-5 hydrogen ion concentration alloy is martensitic in structure within the tempered condition and is more reinforced by a comparatively temperature heat treatment that precipitates a copper containing innovate the alloy. just like the 17-4PH alloy, the 15-5 hydrogen ion concentration chrome steel alloy needs solely an easy heat treatment; a 1 step method conducted at a temperature within the vary 900°F (482°C) to 1150°F (621°C) betting on the mixture of strength and toughness desired. a good vary of properties is created by this one step heat treatment. Heat treatment within the 900°F (482°C) vary produces highest strength, though slightly but those of semi-austenitic alloys like S17700 (17-7 PH) or S15700 (15-7 PH). The latter precipitation hardening alloys usually need a lot of steps to complete heat treatment. The15-5 hydrogen ion concentration alloy is usually better-suited for plate applications than ar the semi solid solution alloys.
