M50 Bar

Summary

MATERIAL FOR REQUIREMENTS MELT PRACTICE TYPICAL SPECS. CORROSION RESISTANCE TYPICAL TEMP. LIMIT ALT. TO:
M50 VIM-VAR High Temperature Steel, Aircraft Bearings

VIM-VAR

AMS 6490AMS 6491 - 700°F (371°C) -

General

M50 VIM-VAR is a premium-melted alloy exhibiting excellent resistance to multi-axial stresses and softening at high service temperatures and good resistance to oxidation.

Features & Benefits

  • Refined using vacuum-induction melting (VIM) and vacuum-arc remelting (VAR) processes
  • Exhibits excellent resistance to multi-axial stresses and softening at high service temperatures as well as good resistance to oxidation. 
  • Characteristic of a high-speed tool steel, it possesses high compressive strength. 
  • Due to the alloy's high degree of cleanliness, parts are capable of being finished to a high luster.

Typical Applications

M50 VIM-VAR Bearing Steel has been used in a wide variety of applications in the bearing and missile industry for components which require high wear resistance and strength at elevated temperatures. It has been used for bearings in aircraft and gas turbine engines operating at service temperatures up to about 700°F (371°C).

Examples of applications include helicopter rotor bearings or gas turbine engine applications that require hot hardness.

This alloy could also be considered for use in tooling applications where high levels of performance are required.

Chemical Analysis

Carbon 0.80 - 0.85 Manganese 0.15 - 0.35
Chromium 4.00 - 4.25 Molybdenum 4.00 - 4.50
Silicon 0.25 max Sulfur 0.008 max
Nickel 0.15 max Phosphorus 0.015 max
Vanadium 0.90 - 1.10 Cobalt 0.25 max
Tungsten 0.25 max Copper 0.10 max

Specifications

AMS 6491 (VIM-VAR)
AMS 6490 (VAR)
Reference UNS K88165

Stocking Size Range

  • 0.200" - 6.500"ø