MP35N UNS R0035 is a nickel-cobalt alloy which provides a unique combination of properties including ultra-high strength, toughness, ductility, and outstanding corrosion resistance, being used for fasteners and components in the medical, aerospace, and oil and gas industry.

  • AMS 5844 – solution treated and cold drawn bar
  • AMS 5845 – solution heat treated, cold drawn and aged bars
  • NACE MR 01-75 – sulphide stress cracking resistant material for oil field equipment
  • AMS 7468 – bolts and screws, forged head, roll threaded after ageing

Fully certified material, additional testing available

UK, US and European origin unless otherwise stated


MP35N™ is a trademark of the following organisations– SPS Technologies LLC / Latrobe Speciality Metals / Carpenter Technology Corporation – and ATI 35N™ – ATI Speciality Metals 

Same day quote, next day dispatch

Make an Enquiry

We hold stock from 12.7 mm (1/2”) to 76.2 mm (3”), mainly in the optimum SCC (NACE) condition, along with selected smaller sizes of AMS material. Material can also be supplied as cold drawn tubing on a leadtime.

MP35N Chemical Properties

Balance (usually about 35%)33 - 37% 19 - 21%9 - 10.5%0.025% max0.15% max 0.15% max0.015% max0.01% max1% max1% max0.15% max

MP35N Mechanical Data

Spec (aging time / temp) Guaranteed minimum properties
Acc to NACE MR 0175UTS (ksi)YS (0.2%) ksiElong % (4D)RA %HRC (max)
Age 1300 °F / time 4 hours220210104051
Age 1350 °F / time 4 hours210200104051
Age 1425 °F / time 6 hours190180104051

For more technical information download our MP35N information sheet here


The high strength variant of MP35N™ is used in the medical and aerospace industry while material produced for optimum corrosion resistance properties is primarily used in the oil and gas industry.

Applications include:

  • fasteners
  • springs
  • non-magnetic electrical components
  • instrument parts
  • valve components
  • high pressure door fittings
  • actuators
  • seals
  • shafts and other components.

“We are not the biggest steel distributor around, but have differentiated ourselves by focusing on service, reliability and trying to find ways of helping customers rather than by just supplying metal – conversion, holding specific stock for quick delivery and consignment stock”

Mike Andrews


Proud Associates

Broder Metals Group Certified To AS9120
Broder Metals Group Certified To AS9120