MP35N Composition

MP35N is an ultra-high strength nickel-cobalt alloy known for its toughness, ductility and exceptional corrosion resistance. Manufactured using a process involving less cold work reduction, the alloy has the best balance of strength and stress corrosion cracking resistance for harsher environments. This alloy is work-strengthened to attain strength levels of 260 to 300 ksi (1793-2086 MPa) at its full strength levels.

MP35N alloy resists corrosion in hydrogen sulfide, salt water and other chloride solutions, as well as mineral acids (nitric, hydrochloric, sulfuric). In addition, it has exceptional resistance to crevice corrosion cracking in seawater and other hostile environments.

Nominal Composition in Percentage:

Ni                    35.00

Co                  Balance

Cr                    20.00

Mo                   9.75

Fe                    1.00

Si                    0.150

Mn                   0.150

C                     0.025

Ti                    1.000

P                     0.015

B                     0.010

S                     0.010

UNS Number:


Other Standard Specifications:

AMS 5844


8.43 g/cm3 (0.304 lbs/in2)

Exceptional Properties:

High strength, temperature resistance, corrosion resistance



MP35N is a Registered Trademark of SPS Technologies