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.
- Inventory & Specs
- Chemical Composition
- Physical Properties
- Mechanical Properties
- Datasheet
- Additional Info
Inventory Size Ranges for Greek Ascoloy
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Characteristics of Greek Ascoloy
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.
Working with Greek Ascoloy
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. Hardening of this grade is accomplished by austenitizing at 1750-1800°F (954-982°C) followed by air or oil quench to form martensite. Immediately following austenitizing, tempering should be carried out in the range of 1000-1250°F (538-677°C) for two hours. The hot working range is 1700-2150°F (927-1177°C). Large sections should be preheated at 1200-1400° (649-760°C) to prevent strain cracking.
Other industry standards we comply with:
- PWA LCS
- 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 Trade Names
Industry Applications for 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
| Element | Min | Max | |
|---|---|---|---|
| Fe | Iron | - | 81.00 |
| Cr | Chromium | - | 13.00 |
| W | Tungsten | - | 3.00 |
| Ni | Nickel | - | 2.0 |
| C | Carbon | - | 1.00 |
Physical Properties
- Density: 0.284 lb/in3 (7.86 g/cm3)
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.
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.
Machinability
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.