Cobalt Alloy Fasteners

Cobalt Alloy Fasteners are the solution for fastening critical assemblies that operate under the most severe conditions, particularly combining high temperature and intense mechanical stress. These fasteners, including bolts, nuts, and screws, are made from cobalt-based superalloys (such as Stellite), characterized by their exceptional hardness and resistance to thermal shock, creep, and fatigue. The alloy's inherent chemistry provides outstanding galling resistant properties, preventing thread seizure in hot, high-load joints. Zeron Fastners is a specialized manufacturer and supplier in India, providing a full range of these high temperature fasteners to meet the strict demands of power generation, aerospace, and petrochemical industries for reliable, severe corrosion resistance.

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Cobalt Alloy Fastener 348

Cobalt Alloy Fasteners Chemical Composition

Element Composition
Cobalt (Co) Balance
Chromium (Cr) 19.0 - 21.0
Tungsten (W) 14.0 - 16.0
Nickel (Ni) 9.0 - 11.0
Iron (Fe) 3.0 max
Carbon (C) 0.05 - 0.15

Cobalt Alloy Fasteners Mechanical Properties

Property Value
Tensile Strength, min 860 MPa
Yield Strength, min 350 MPa
Max Operating Temperature 980°C
Oxidation Resistance Excellent up to 1095°C
Galling Tendency Low

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