ATI Allegheny Ludlum AL 17-4 High Strength Stainless Steel, UNS S17400

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ATI Allegheny Ludlum AL 17-4 High Strength Stainless Steel, UNS S17400
Categories:	Metal; Ferrous Metal; Stainless Steel; Precipitation Hardening Stainless
Material Notes:	ATI 17-4™ precipitation hardening stainless steel (S17400), Type 630, is a chromium-nickel-copper precipitation hardening stainless steel used for applications requiring high strength and a moderate level of corrosion resistance. High strength is maintained to approximately 600°F (316°C). This alloy is designated Grade or Type 630 in several specifications. The S17400 alloy is martensitic in structure in the annealed condition and is further strengthened by a low temperature treatment which precipitates a copper containing phase in the alloy. In comparison to many alloys in the precipitation hardening family, the S17400 alloy requires a simple heat treatment; a one step process conducted at a temperature in the range 900°F (482°C) to 1150°F (621°C) depending on the combination of strength and toughness desired. A wide range of properties can be produced by this one step heat treatment. Heat treatment in the 900°F (482°C) range produces highest strength, although slightly less than that of alloys like S17700 or S15700. The latter precipitation hardening stainless steels generally require more steps to complete heat treatment.
Key Words:	DIN 1.4548; ASTM A-693; ASME SA-693; AMS 5604, 17-4PH, 17/4PH, 17-4 PH; formerly sold under the Allvac® Vasco® 17-4 trade names
Vendors:

Available Properties
Density Hardness, Rockwell C Tensile Strength, Ultimate Tensile Strength, Yield Elongation at Break Chromium, Cr Copper, Cu Iron, Fe, as balance Nickel, Ni

Property Data

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Manufacturer Notes:
ATI Allegheny Ludlum, Allegheny Technologies Incorporated

Category Notes
none

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