Metallurgical specifications of Rods of Stainless Steel alloy 17-4Ph

General Characteristics
17-4Ph is a precipitation hardening martensitic stainless-steel. A wide range of mechanical properties is available via simple aging within a 900-1150°F (482-621°C) temperature range. Vacuum arc re-melting provides low gas content, superior cleanliness and optimum transverse properties.

Typical applications include aircraft and missile structural components, gears, valves, fasteners, jet engine and nuclear reactor parts.
Typical Chemical Composition

Weight % C Mn Si Cr Ni P S Cu Nb Fe

minimum — — — 15.50 3.00 — — 3.00 0.15 Remainder

maximum 0.07 1.00 1.00 17.50 5.00 0.04 0.03 5.00 0.45

Weight %	C	Mn	Si	Cr	Ni	P	S	Cu	Nb	Fe
minimum	—	—	—	15.50	3.00	—	—	3.00	0.15	Remainder
maximum	0.07	1.00	1.00	17.50	5.00	0.04	0.03	5.00	0.45

Characteristics		English	Metric
Nominal density (68°F/20°C)		0.28 lbs/in³	7.80 g/cm³
Melting range		2560°F-2625°F	1400°C-1440°C
Specific heat (212 °F/100°C)		0.11 BTU/lb – °F	460 J/KG- °K
Coefficient of thermal expansion	32°F – 212°F 0°C – 100°C	6.0 micro in/in- °F	10.8 micro m/m- °K
Coefficient of thermal expansion	32°F – 600°F 0°C – 315°C	6.4 micro in/in- °F	11.6 micro m/m- °K
Thermal conductivity	100°C	10.6BTU/ft- hr – °F	18.3W/m – °K
Thermal conductivity	500°C	13.1 BTU/ft- hr – °F	23 W/m – °K
Electrical properties	Electrical resistivity	800 nΩ ∙ m
Electrical properties	Magnetic parambility	95

Condition	Tensile								Hardness	Fracture toughness
	Ultimate		Yield		Elongation		Reduction in area, %		HRC
	KSI	MPa	KSI	MPa	Lo	Tr	Lo	Tr	Range
H900	190	1310	170	1170	10	6	40	35	40-47	48	53
H925	170	1170	155	1070	10	7	44	38	38-45	—	—
H1025	155	1070	145	1000	12	8	45	—	34-42	—	—
H1075	145	1000	125	860	13	9	45	—	31-38	—	—
H1150	135	930	105	725	16	11	50	—	28-37	—	—
H1150M	115	795	75	515	18	14	55	—	24	—	—

Stainless Steel Alloy 17-4Ph