High-Temperature Cobalt Alloy Bolts

High-Temperature Cobalt Alloy Bolts are critical fasteners developed to withstand the harshest combination of heat and mechanical stress found in modern engineering. Alloys such as Haynes 188 or various Stellite grades provide exceptional resistance to creep and stress-rupture, maintaining their high strength and integrity at temperatures exceeding 900°C (1650°F). Their naturally high chromium content also offers excellent oxidation resistant properties in hot atmospheres. Zeron Fastners specializes in manufacturing and supplying these high-performance fasteners for gas turbine hot sections, furnace components, and aerospace structures where thermal stability is paramount, ensuring superior durability and safety.

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Cobalt Alloy Bolt 352

High-Temperature Cobalt Alloy Bolts Chemical Composition

Element Composition
Cobalt (Co) Balance
Chromium (Cr) 20.0 - 24.0
Nickel (Ni) 20.0 - 24.0
Tungsten (W) 2.0 - 4.0
Iron (Fe) 3.0 max
Lanthanum (La) 0.01 - 0.15
Carbon (C) 0.05 - 0.15

High-Temperature Cobalt Alloy Bolts Mechanical Properties

Property Value
Tensile Strength, minimum 855 MPa
Yield Strength, minimum 345 MPa
Rupture Strength 100 MPa
Oxidation Resistance Excellent up to 1095°C
Creep Resistance Superior

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