17-4PH® Stainless Steel UNS S17400

17-4 PH Stainless Strip is the most widely used of all precipitation hardening stainless steels. It's a martensitic steel that combines high strength, corrosion resistance, impecable mechanical properties up to 600°F and good toughness.

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Strip, Coil, Foil, Wire, AMS 5523, ASTM A167


What is 17-4 PH Stainless Steel?

Type 17-4PH is a martensitic precipitation-hardening stainless steel that provides an outstanding combination of high strength, good corrosion resistance, good mechanical properties at temperatures up to 600 °F (316 °C), good toughness in both base metal and welds, and short time, low-temperature heat treatments that minimize warpage and scaling.

What is the chemical composition of 17-4 stainless?

Carbon: 0.070 max
Manganese: 1.00 max
Silicon: 1.00 max
Chromium: 15.00-17.00 Nickel: 3.00-5.00
Copper: 3.00-5.00
Columbium + Tantalum: 5 x
Carbon min - 0.45 max
Phosphorus: 0.040 max
Sulfur: 0.030 max
Iron: Balance

Physical Properties of 17-4 PH Stainless?

Density: 0.28 lbs/in3 7.80 g/cm3

Electrical Resistivity: (microhm-cm):
68 °F (20 °C): 98

Specific Heat: BTU/lbl°F (kJ/kg•K):
32 - 212 °F (0 - 100 °C): 0.11 (0.46)

Thermal Conductivity: BTU/hr/ft2/ft/° F (W/m•K)
At 300 ° F (149 ° C): 124 (17.9)
At 900 ° F (482 ° C): 157 (22.6)

Mean Coefficient of Thermal Expansion: in/inl° F (µm/m•K):
70 - 200 ° F (21 - 93 °C): 6.0 x 10-5 (10.8)
70 - 600 ° F (21 - 315 ° C): 6.2 x 1 o-6 (11.2)
70 - 800 ° F (21 - 427 ° C): 6.3 x 10-5 (11.3)

Modulus of Elasticity: ksi (MPa)
29 x 103 (200 x 103) in tension
11 .2 x 103 (78 x 103) in torsion

Magnetic Permeability: Strongly ferromagnetic in all conditions


Coil - Strip, Foil, Ribbon Wire - Profile, Round, Flat, Square

Mechanical Properties at Room Temperature

Properties of 17-4PH Stainless Steel in the Annealed Condition

ASTM A693 (all gauges), AMS 5604 (gauges: < .015 inches)
Hardness: Re 38 max

AMS 5604 (gauges: 􀀑 .015 inches)
Ultimate Tensile Strength: 185 KSI max (1255 MPa max)
Yield Strength (0.2% offset): 160 KSI max (1105 MPa max)
Elongation: 3% Min Hardness: Re 38 max
* For all thicknesses, prefer material to be ordered to ASTM A693 instead of AMS 5604 particularly at greater or equal to . 015".

Heat Treat Capabilities (Aged)


Ultimate Tensile Strength:190 KSI min (1310 MPa min)
Yield Strength (0.2% Offset): 170 KSI min (1170 MPa min)
Elongation: 5% min
Hardness: Re 40-48

Ultimate Tensile Strength: 170 KSI min (1170 MPa min)
Yield Strength: 155 KSI min (1070 MPa min)
Elongation: 5% min
Hardness: Re 38-46

Ultimate Tensile Strength: 155 KSI min (1070 MPa min)
Yield Strength: 145 KSI min (1000 MPa min)
Elongation: 5% Min Hardness: Re 35-43

Ultimate Tensile Strength: 145 KSI min (1000 MPa min)
Yield Strength: 125 KSI min (860 MPa min) Elongation: 5% min
Hardness: Re 35-43

Ultimate Tensile Strength: 140 KSI min (965 MPa min)
Yield Strength: 115 KSI min (790 MPa min)
Elongation: 5% min
Hardness: Re 31-40

Ultimate Tensile Strength: 135 KSI min (930 MPa min)
Yield Strength: 105 KSI min (725 MPa min)
Elongation: 8% min
Hardness: Re 28-38

Ultimate Tensile Strength: 115 KSI min (790 MPa min)
Yield Strength: 75 KSI min (515 MPa min)
Elongation: 9% min
Hardness: Re 26-32

Additional Properties

Corrosion Resistance

The corrosion resistance of Type 17-4PH is comparable to that of Type 304 Stainless Steel in most media and superior to that of the hardenable 400 series stainless steels. Refer to NACE (National Association of Corrosion Engineers) for recommendations .


# 1 - Hot rolled annealed and descaled. It is available in strip, foil and ribbon. It is used for applications where a smooth decorative finish is not required.
# 2D - Dull finish produced by cold rolling, annealing and descaling. Used for deep drawn parts and those parts that need to retain lubricants in the forming process.
# 2B - Smooth finish produced by cold rolling, annealing and descaling. A light cold rolling pass is added after anneal with polished rolls giving it a brighter finish than 2D.
#BA- Bright annealed cold rolled and bright annealed
#CBA- Course bright annealed cold rolled matte finish and bright anneal
#2 - Cold Rolled
# 2BA- Smooth finish produced by cold rolling and bright annealing. A light pass using highly polished rolls produces a glossy finish. A 2BA finish may be used for lightly formed applications where a glossy finish is desired in the formed part. Polished - Various grit finish for specific polish finished requirements.

* Not all finishes are available for all alloys - Contact Ulbrich Sales for more information.

Wire Finishes

XC - Extra clean bright annealed or bright annealed and cold rolled Grease - Ultra-bright finish (for decorative applications) Soap - Soap is not removed from tempered wire to act as a lubricant. * Contact Ulbrich Wire for custom wire finishes.

Heat Treatment

Type 17-4PH can be heat treated to increase mechanical properties. Contact Ulbrich Technical Service for information.


For best results refer to: SSINA's "Welding of Stainless Steels and Other Joining Methods".

Limitation of Liability and Disclaimer of Warranty: In no event will Ulbrich Stainless Steels & Special Metals, Inc., be liable for any damages arising from the use of the information included in this document or that it is suitable for the 'applications' noted. We believe the information and data provided to be accurate to the best of our knowledge but, all data is considered typical values only. It is intended for reference and general information and not recommended for specification, design or engineering purposes. Ulbrich assumes no implied or express warranty in regard to the creation or accuracy of the data provided in this document.

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