MP35N*

Available in any of the 'profile options'

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.

MP35N is also known as Allvac 35N.

Chemical Composition

Specifications

Designations

Key Features

Typical Applications

Element	Min %	Max %
C	–	0.025
P	–	0.015
Si	–	0.15
Ni	33.00	37.00
Co	bal
Mn	–	0.15
S	–	0.01
Cr	19.00	21.00
Mo	9.00	10.50
Ti	–	1.00
Fe	–	1.00

AMS 5844
AMS 5845
ASTM F562
ISO 15156-3
(NACE MR 0175)
ISO 5832-6

W. Nr. 2.4999
UNS R30035
AWS 110

Combination of high strength, ductility and good mechanical properties at ambient temperatures
Excellent corrosion resistance in hydrogen sulphide
Excellent resistance to crevice and stress corrosion cracking in sea water
Age hardenable (Spring Temper only)

Medical Devices
Marine Engineering

Density	8.43 g/cm³	0.304 lb/in³
Melting Point	1440°C	2625°F
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

Heat Treatment of Finished Parts
Condition as supplied by Alloy Wire	Type	Temperature		Time (Hr)	Cooling
Condition as supplied by Alloy Wire	Type	°C	°F	Time (Hr)	Cooling
Annealed	–	–	–	–	–
Spring Temper	Age Harden	650	1200	4	Air

Properties
Condition	Approx. tensile strength		Approx. operating temperature
Condition	N/mm²	ksi	°C	°F
Annealed	< 1100	< 160	-200 to +315	-330 to +600
Spring Temper	1400 – 1900	203 – 276	-200 to +315	-330 to +600
Spring Temper + Aged	1900 – 2200	276 – 319	-200 to +315	-330 to +600