Greek Ascoloy 418 Stainless Bar - AMS 5616

Greek Ascoloy 418 stainless bar is a higher strength modification of the 12% chromium family of martensitic stainless steels. It's a precipitation, age hardenable stainless steel that features transverse toughness. It can be machined in all conditions. Greek Ascoloy retains corrosion and oxidation resistance and has usable strength and creep resistance to 1050ºF (566ºC). This grade is used for jet engine compressor blades and vanes due to resistance to stress corrosion cracking. Also used for discs in lower temperature turbine stages and for turbine diffuser components.

Greek Ascoloy Inventory Size Ranges


0.250" - 6.000"

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Standard Inventory Specifications

  • AMS 5616
  • UNS S41800

Other industry standards we comply with:

  • GE Aircraft Engine (GT193)
  • GE S400
  • DFARS Compliant
  • RR SABRe
  • Line marked > .500 inch diameter
  • Predominantly produced by VIM-VAR melt method. Hot rolled, fully annealed, then centerless ground or rough turned.

Common Applications of Greek Ascoloy

  • Steam turbine buckets and blades
  • Gas turbine compressor parts
  • High temperature bolts
  • Jet engine compressor blades and vanes
  • Turbine diffuser components
  • Aircraft landing gear
    petrochemical components

Chemical Composition

Chemical Composition of 418 Greek Ascoloy Stainless Steel Bar
Element Percent by Weight
Fe Iron 81.00%
Cr Chromium 13.00%
W Tungsten 3.00%
Ni Nickel 2%
C Carbon 1.00%
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Greek Ascoloy 418 Stainless Steel Physical Properties

Physical Properties The corrosion resistance of Greek Ascoloy 418 stainless bar is similar to Alloy 410 stainless bar.  This grade resists oxidation up to 1400˚F (760˚C) and may be used in continuous service at 1100˚F (593˚C). A wide range of mechanical properties can be obtained by hardening and tempering this alloy.
Density 0.284 lbs/in3, 7.86 g/cm3



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Greek Ascoloy 418 Stainless Steel Mechanical Properties

Hardness Hardness of stock is typically 250 BHN. Supplied in the fully annealed condition. Hardening of this grade is accomplished by austenitizing at 1750-1800ºF (954-982°C) followed by air or oil quench to form martensite.Immediately following austenitizing, tempering should be carried out in the range of 1000-1250ºF (538-677°C) for two hours. The hot working range is 1700-2150ºF (927-1177°C). Large sections should be preheated at 1200-1400º (649-760°C) to prevent strain cracking.

Rating: 55% OF B-1112.

Typical stock removal rate: 90 surface feet/minute with high speed tools, 150 surface feet/minute with carbide.

Best machinability is in the fully annealed condition. Greek Ascoloy 418 stainless bar has a low work hardening rate and is not "gummy" like austenitic stainless steels during machining.


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*The technical data provided is for information only and not for design purposes. It is not warranted or guaranteed.