Product Description: Stellite 31 Alloy / R30031
Stellite 31 / R30031 is a cobalt-based heat resistant and wear resistant alloy designed for operation under high temperatures, severe mechanical wear, and corrosive environments. The material features high hardness, excellent abrasion resistance, and strong retention of properties at elevated temperatures.
General Technical Characteristics
Stellite 31 alloy offers high mechanical strength, corrosion resistance, and structural stability under thermal stress. It performs effectively in conditions involving friction, impact loading, and aggressive media.
Key properties:
- high wear resistance
- excellent corrosion resistance
- oxidation resistance
- retention of hardness at elevated temperatures
Chemical Composition
The alloy contains:
- Cobalt (Co): base element
- Chromium (Cr): approx. 24–28%
- Tungsten (W): approx. 7–9%
- Nickel (Ni): up to 3%
- Carbon (C): approx. 0.4–0.6%
- Iron (Fe): up to 3%
This composition provides high hardness and wear resistance.
Mechanical Properties
The alloy demonstrates:
- high hardness
- excellent resistance to abrasive and adhesive wear
- resistance to thermal fatigue
- stability of properties at elevated temperatures
Applications
Stellite 31 alloy is used for manufacturing and hardfacing of:
- valves and valve seats
- pump and turbine components
- cutting tools
- chemical processing equipment parts
- components operating under severe wear conditions
It is widely applied in power generation, oil and gas, chemical, and mechanical engineering industries.
Features
Key advantages include:
- high wear resistance
- excellent corrosion resistance
- stability at elevated temperatures
- long service life
Supply Formats and Standards
The material is supplied as:
- bars
- hardfacing powders
- cast ingots
- welding consumables
Complies with:
- UNS R30031
Stellite 31 alloy is an effective solution for manufacturing and restoration of components operating under high temperatures, severe wear, and aggressive environments, where reliability and long-term durability are essential.
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