MP35N^* Specification
*Trade name of SPS Technologies

MP35N is an age hardenable Nickel-Cobalt base alloy that has a unique combination of properties - ultra high strength, toughness, ductility and outstanding corrosion resistance. MP35N resists corrosion in hydrogen sulphide, salt water and other chloride solutions. It also has excellent resistance to crevice and stress corrosion cracking in sea water and other hostile environments. Suitable where a high combination of strength, high modulus values and good corrosion resistance are required. Applications for this alloy also include medical devices and dental products.

Good Mechanical Properties at Elevated Temperatures	No
Corrosion Resistant at Ambient Temperatures	Yes
Corrosion Resistant & Good Mechanical Properties at Elevated Temperatures	Yes
Oxidation Resistant	Yes
Precipitation Hardenable	Yes

Approximate Chemical Composition
Ni	35%
Co	35%
Cr	20%
Mo	10%

Properties
DENSITY	8.43 g/cm3	0.304 lb/in3
MELTING POINT	1440oC	2625oF
COEFFICIENT OF EXPANSION	12.8 µm/m °C (20 - 100°C)	7.1 x 10-6 in/in °F (70 - 212°F)
MODULUS OF RIGIDITY	80.7 kN/mm2	11705 ksi
MODULUS OF ELASTICITY	234 kN/mm2	33939 ksi

CONDITION OF SUPPLY	HEAT TREATMENT (AFTER FORMING)
Annealed	MP35N cannot be age hardened in the annealed condition.
Spring Tempered	Age harden at 650°C (1200°F) for 4 hours and air cool.

CONDITION	APPROX TENSILE STRENGTH		APPROX SERVICE TEMPERATURE
Annealed	800 - 1000 N/mm2	116 - 145 ksi	-200 to 315°C	-330 to 600°F
Spring Tempered	1400 - 1900 N/mm2	203 - 276 ksi	-200 to 315°C	-330 to +600°F
Spring Temper + Aged	1900 - 2200 N/mm2	276 - 319 ksi	-200 to 315°C	-330 to 600°F