Stainless Steel Alloy 17-4 PH Plate

Stainless steel Alloy 17-4 PH is a precipitation hardening martensitic stainless steel with Cu and Nb/Cb additions. The grade combines high strength, hardness (up to 572°F / 300°C), and corrosion resistance.

Type 630, better known as 17-4, is the most common PH stainless. Type 630 is a martensitic stainless steel that offers superior corrosion resistance.

Grade	C	Mn	Si	P	S	Cr	Ni	Cu	Nb+Ta
630	min. max	- 0.07	- 1	- 1	- 0.04	- 0.030	15 17.5	3 5	3 5	0.15 0.45

Benefits

• Higher creep stress and rupture properties when compared with 304

• Ideal for high temperature service

• Overcomes sensitization and intergranular corrosion concerns

• Can be used in elevated temperature applications for ASME Boiler and Pressure Vessel Code applications

• Excellent mechanical properties

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