MP35N®

UNS #R30035

MP35N® is a nonmagnetic, nickel-cobalt-chromium-molybdenum alloy possessing a unique combination of ultra-high tensile strength (up to 300 ksi [2068 MPa]), good ductility and toughness, and excellent corrosion resistance. In addition, this alloy displays exceptional resistance to sulfidation, high temperature oxidation, and hydrogen embrittlement. The unique properties of MP35N are developed through work hardening, phase transformation, and aging. If the alloy is used in the fully work hardened condition, service temperatures up to 750°F (399°C) are suggested. It is typically produced by vacuum induction melting (VIM), followed by vacuum arc remelting (VAR).

*MP35N is a trademark of SPS Technologies, Inc.

Type Analysis

  • Carbon (Maximum) 0.02
  • Phosphorus (Maximum) 0.015
  • Silicon (Maximum) 0.15
  • Nickel (Nominal) 33.00-37.00
  • Titanium (Nominal) 1
  • Manganese (Maximum) 0.15
  • Sulfur (Maximum) 0.01
  • Chromium (Nominal) 19.00-21.00
  • Cobalt (Nominal) Balance
  • Molybdenum (Nominal) 9.00-10.50
  • Iron (Nominal) 1
  • Boron (Nominal) 0.01

Applications

Fasteners, springs, nonmagnetic electrical components and instrument parts in medical, seawater, oil and gas well, and chemical and food processing environments

Applicable Specifications

  • AMS 5758
  • AMS 5845
  • AMS 5844
  • ANSI/ASTM F562

Bar

Billet

Rod

Rounds

Strip

Wire

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