Tuesday, January 21, 2014

17-4PH

17-4PH is a precipitation-hardening martensitic stainless steel with Cu and Nb/Cb additions, also known as Type 630. It is chromium-copper stainless steel used for application where high strength and a moderate lever of corrosion resistance are required. This steel maintains its strength and corrosion properties in temperatures up to 800⁰F. The corrosion resistance is better than standard hardenable stainless steels and is comparable to stainless steel type 304 or 430. It has excellent mechanical properties, good toughness and the mechanical properties can be optimized with heat treatment. 

17-4 is readily weldable by all the commercial processes and preheating ad post hearing practices are not required. This material forges easily. It has a tensile strength of 150,000 PSI, yield strength of 110,000 PSI and Elongation of 10% in 2”.  Due to the versatile properties of the this steel it is used widely in the aerospace, chemical, nuclear, food processing and paper industries in many different applications like turbine blades, helicopter decks platforms and foils.


CHEMICAL ANALYSIS
C
Cr
Mn
Cu
Ni
P
Si
S
Cb+Ta
Max .07
15.0-17.50
Max 1.0
3.0-5.0
3.0-5.0
Max .04
Max 1.0
Max .03
5xC/.45

This stainless steel provides an outstanding combination of high strength, good corrosion resistance, good mechanical properties and good toughness.

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