13-8MO Suppliers: Stainless Steel Metallurgical specifications

General Characteristics
13-8Mo is a precipitation hardening martensitic stainless-steel offering excellent fracture toughness and transverse mechanical properties coupled resistance to stress-corrosion cracking. It exhibits high strength characteristics common to the family of precipitation hardening steels. A wide range of mechanical properties can be realized by selecting various single cycle low temperature aging treatments.

Typical applications include aircraft and nuclear reactor components, fasteners, gears, valves and jet engine parts. This alloy should be considered for applications requiring a combination of stress-corrosion resistance and high strength properties.
Typical Chemical Composition

Weight % C Mn Si Cr Ni P S Mo Al N Fe

minimum — — — 12.25 7.50 — — 2.0 0.90 — Remainder

maximum 0.05 0.20 0.10 13.25 8.50 0.01 0.008 2.5 1.35 0.01

Weight %	C	Mn	Si	Cr	Ni	P	S	Mo	Al	N	Fe
minimum	—	—	—	12.25	7.50	—	—	2.0	0.90	—	Remainder
maximum	0.05	0.20	0.10	13.25	8.50	0.01	0.008	2.5	1.35	0.01

Characteristics		English	Metric
Nominal density (68°F/20°C)		0.282 lbs/in³	7.80 g/cm³
Melting range		2560°F-2625°F	1405°C-1440°C
Specific heat (212 °F/100°C)		0.110 BTU/lb – °F	460 J/KG- °K
Coefficient of thermal expansion	32°F – 212°F 0°C – 100°C	5.9 micro in/in- °F	10.6 micro m/m- °K
	32°F – 600°F 0°C – 315°C	6.2 micro in/in- °F	11.2 micro m/m- °K
	32°F – 1000°F 0°C – 538°C	6.6 micro in/in- °F	11.9 micro m/m- °K
Thermal conductivity	100°C	8.1 BTU/ft- hr – °F	14 W/m – °K
Thermal conductivity	500°C	12.7 BTU/ft- hr – °F	22 W/m – °K
Electrical properties	Electrical resistivity		1020 nΩ ∙ m
Electrical properties	Magnetic parambility		—

Condition	Tensile							Hardness	Machinability	Modulus
	Ultimate		Yield		Elongation	Reduction in area, %		HRB	100% – 1212 steel	Modulus of elasticity
	KSI	MPa	KSI	MPa	%	Lo	Tr	Min	%	KSIx10³	GPa
H950	220	1520	205	1410	6-10	—	—	45	35 – 40	28.6	197
H1000	200	1380	190	1310	6-10	—	—	43	35 – 40	32.1	221

Stainless Steel Alloy 13-8Mo Sales:+972 4 618 2000

General Characteristics
13-8Mo is a precipitation hardening martensitic stainless-steel offering excellent fracture toughness and transverse mechanical properties coupled resistance to stress-corrosion cracking. It exhibits high strength characteristics common to the family of precipitation hardening steels. A wide range of mechanical properties can be realized by selecting various single cycle low temperature aging treatments.

Typical applications include aircraft and nuclear reactor components, fasteners, gears, valves and jet engine parts. This alloy should be considered for applications requiring a combination of stress-corrosion resistance and high strength properties.
Typical Chemical Composition

Weight % C Mn Si Cr Ni P S Mo Al N Fe

minimum — — — 12.25 7.50 — — 2.0 0.90 — Remainder

maximum 0.05 0.20 0.10 13.25 8.50 0.01 0.008 2.5 1.35 0.01

Weight %	C	Mn	Si	Cr	Ni	P	S	Mo	Al	N	Fe
minimum	—	—	—	12.25	7.50	—	—	2.0	0.90	—	Remainder
maximum	0.05	0.20	0.10	13.25	8.50	0.01	0.008	2.5	1.35	0.01

Characteristics		English	Metric
Nominal density (68°F/20°C)		0.282 lbs/in³	7.80 g/cm³
Melting range		2560°F-2625°F	1405°C-1440°C
Specific heat (212 °F/100°C)		0.110 BTU/lb – °F	460 J/KG- °K
Coefficient of thermal expansion	32°F – 212°F 0°C – 100°C	5.9 micro in/in- °F	10.6 micro m/m- °K
	32°F – 600°F 0°C – 315°C	6.2 micro in/in- °F	11.2 micro m/m- °K
	32°F – 1000°F 0°C – 538°C	6.6 micro in/in- °F	11.9 micro m/m- °K
Thermal conductivity	100°C	8.1 BTU/ft- hr – °F	14 W/m – °K
Thermal conductivity	500°C	12.7 BTU/ft- hr – °F	22 W/m – °K
Electrical properties	Electrical resistivity		1020 nΩ ∙ m
Electrical properties	Magnetic parambility		—

Condition	Tensile							Hardness	Machinability	Modulus
	Ultimate		Yield		Elongation	Reduction in area, %		HRB	100% – 1212 steel	Modulus of elasticity
	KSI	MPa	KSI	MPa	%	Lo	Tr	Min	%	KSIx10³	GPa
H950	220	1520	205	1410	6-10	—	—	45	35 – 40	28.6	197
H1000	200	1380	190	1310	6-10	—	—	43	35 – 40	32.1	221

Stainless Steel Alloy 13-8Mo