Skip to content

SS 17/4 PH® • UNS S17400

SS 17/4 PH® is a precipitation hardenable Martensitic stainless steel with high strength, and good corrosion resistance. It is easily heat treated from the annealed temper.

The corrosion resistance of the alloy is comparable to SS 302. It is heat treated at 900° F/1 Hour for highest strength. Other thermal treatments can be utilized to provide greater toughness and improved formability. Joining of the alloy is accomplished by the usual methods that are effective for stainless steel.

Available Sizes:

SS 17/4 PH® is available from Hamilton Precision Metals as strip product in thicknesses from 0.001” to 0.050” (0.0254 mm to 1.27 mm) and widths up to 12.0” (304.8 mm). The material conforms to AMS 5604, ASTM A693 and UNS S17400.

Nominal Composition
SS 17/4 PH® NOMINAL COMPOSITION
Chromium 15.3%
Nickel 4.3%
Copper 3.3%
Columbium/
Tantalum
0.25%
Carbon 0.04%
Iron Balance


Mechanical Properties
SS 17/4 PH® MECHANICAL PROPERTIES
ANNEALED ANNEALED HEAT TREATED
Ultimate Tensile Strength 160,000 PSI 200,000 PSI
Yield Strength (0.2% Offset) 145,000 PSI 180,000 PSI
Elongation in 2” * 5% 3%
Modulus of Elasticity (Tension) 28.5 x 10-6 PSI
Poisson’s Ratio 0.27

*The measured elongation will be less as thickness decreases to 0.002” and less.
These values may be adjusted by control of process variables – consult HPM for desired values


Physical Properties
SS 17/4 PH® PHYSICAL PROPERTIES
Density (Heat Treated) 0.282 lbs/cu.in.
Electrical Resistivity (Heat Treated) 80 Microhm·cm
Thermal Expansion Coefficient
(21° to 93°C) – Heat Treated
10.8 x 10-6 /°C
Thermal Conductivity @ 150°C 17.9 W/m·K
Magnetic Attraction Yes

Typical values to guide alloy selection but are not a guarantee of minimum or maximum.