17-4PH H900 STAINLESS

Alloy 17-4 is a chromium-copper precipitation hardening stainless steel that is used for applications requiring high strength and a moderate level of corrosion resistance. It is one of the most widely used precipitation hardening grades, as it has high strength hardness up to about 572°F while demonstrating good corrosion resistance in all heat treated conditions. Alloy 17-4 has adequate resistance to atmospheric corrosion or in diluted acid salts where its corrosion resistance is equivalent to Alloy 304 or 430. Alloy 17-4 can be heat treated to a variety of temperatures to develop a wide range of properties. Its mechanical properties can be optimized with heat treatment where very high yield strength up to 180 ksi can be achieved. Alloy 17-4 should not be used at temperatures above 572°F or at very low temperatures.

Typical Mechanical Properties of 17-4 Stainless Steel

Property	Ultimate Tensile Strength	0.2% Yield Strength	Elongation % in 2"	Reduction of Area	Hardness	Impact	Charpy V-notch
	ksi	ksi	or 4XD	%	Brinell	Rockwell	ft.-lbs.
H 900**	200	185	14	50	420	C 44	15
H 925	190	175	14	54	409	C 42	25
H 1025	170	165	15	56	352	C 38	35
H 1075	165	150	16	58	341	C 36	40
H 1100	150	135	17	58	332	C 35	25
H 1150	145	125	19	60	311	C 33	30
H 1150-M	125	85	22	68	277	C 27	100

APPLICATIONS:

Alloy 17-4 is commonly used for applications requiring high strength and a moderate level of corrosion resistance. Some applications that frequently use Alloy 17-4 include:

• Aircraft
• Nuclear waste casks
• Paper mills
• Oil fields
• Mechanical components
• Chemical process components
• Food industry
• Aerospace

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