17-4 Stainless Steel Springs

Type 17-4 PH provides an outstanding combination of high strength and corrosion resistance and is well suited for applications that require ease of fabrication with the addition of strength/hardness for improved reliability. This valuable combination of properties gives designers the opportunity to add reliability to their products while simplifying fabrication and often reducing costs.


Technical Specification 17-4 PH
Nominal Composition

Cr: 15.0 - 17.50

Ni: 3.0 – 5.0

Cu: 3.0 – 5.0


0.28 lb./in3

Modulus of Elasticity (E)

28.5 x 106 psi

Modulus of Rigidity (G)

11.00 x 103 ksi

Coefficient of Expansion

6.0 µin/in.-°F (70°F)

Electrical Resistivity

98.0 µΩ.cm

Thermal Conductivity

124 Btu/(hr/ft2/in/°F)

Min Size

0.003 in (0.080 mm)

Max Temp

316oC (600oF)


Cold drawn & precipitation hardened after fabrication and has high strength.