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Super Alloy MP-35N (tm)

Aging Procedure
Age-hardenable, see "Heat Treat".
Annealing Procedure
Anneal at 1950 F and rapid air cool.
Applications
Chemical process equipment, seawater applications, oil and gas well components in presence of hydrogen sulfide.
Cold Workability
No data, but the good ductility of this alloy should lend itself to cold forming by conventional means.
Formability
Due to this alloys high work hardening rate, it will lose a great deal of its ductility in forming.
Hardening Procedure
Hardenable by a combination of cold work and aging - see "Heat Treat".
Heat Treatability
Anneal at 1950 F and rapid air cool. Age-harden at 1050 F for 4 hours and air cool.
Other Comments
This alloy develops optimum strength by a combination of 50% cold work reduction of area and the aging heat treatment described under "Heat Treat".
Principle Design Features
An age-hardenable cobalt-nickel-chromium alloy with molybdenum for corrosion resistance. The alloy develops very high strength by a combination of cold-working and aging heat treatment. This alloy was developed by SPS Technologies in Pennsylvania. SPS maintains a metallurgical staff able to deal with a variety of technical problem areas.
Tempering Procedure
Not applicable.
Weldability
This alloy can be welded using TIG methods. Welding properties are similar to 304 stainless and similar techniques and procedures should be observed. Best weld result from low heat inputs (roughly one third that of 304 welding) and welding in the annealed condition.

Known Forms

Bar-Hollow
Casting-Centrifugal
Flat Bar
Forgings-Discs
Hexagon Bar
Open Die Forgings
Pipe-Seamless
Pipe-Welded
Plate
Round Bar
Round Bar - Precision Ground
Seamless Rolled Rings
Sheet
Square Bar
Strip
Tube-Round (Seamless)
Tube-Round (Welded)
Tube-Square
Wire Rod
Wire-Flat
Wire-Round
Wire-Shaped
Wire-Welding
Billet
Coil
Contour Rings
Fasteners
Mandrel Rings
Shafts
Shapes-CD
Shapes-Extruded
Shapes-HR

Additional Data

Specifications

5758,5844,5845,M646,R30035

Dismiss

Chemical Elements

Boron0.01 max
Carbon0.025 max
Chromium19 - 21
CobaltBalance
Iron1 max
Manganese0.15 max
Molybdenum9 - 10.5
Nickel33 - 37
Phosphorus0.015 max
Silicon0.15 max
Sulphur0.01 max
Titanium1 max

Physical Properties

Density: 0.304lb/in³
Melting Point: 2580°F
Specific Gravity: 8.43
Specific Heat: 0.11BTU/lb·°F

Mechanical Properties

Modulus of Elasticity – Tension: 34.05MSI

Thermal Conductivity

ConditionTemperatureConductivity
Annealed70 °F7.8 W/m·K
Annealed212 °F8.9 W/m·K
Annealed392 °F10.3 W/m·K
Annealed572 °F11.6 W/m·K
Annealed932 °F14.2 W/m·K

Thermal Expansion

ConditionMinMaxExpansion Coefficient
Annealed70 °F212 °F7.1 µin/in/°F
Annealed70 °F392 °F7.5 µin/in/°F
Annealed70 °F572 °F8.1 µin/in/°F
Annealed70 °F932 °F8.6 µin/in/°F
Periodic Table
Pipe Sizes
Hardness Conversion
Sheet Gauges
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