Cobalt Alloy Nuts

Cobalt Alloy Nuts are premium industrial fasteners specifically chosen for assemblies that experience intense heat, abrasion, and aggressive chemical attack. Alloys based on Cobalt-Chromium-Tungsten (like the Stellite series) exhibit exceptional wear resistant and hardness, which are maintained even at elevated temperatures, preventing the threads from seizing or gallingโ€”a common failure point in high-stress, high-heat applications. These nuts are crucial for ensuring the integrity of connections in hot sections of gas turbines, chemical mixing equipment, and high-wear machinery. Zeron Fastners is a trusted supplier and manufacturer in India, providing a range of reliable, high-performance galling resistant nuts essential for severe service environments.

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Cobalt Alloy Nut 340

Cobalt Alloy Nuts Chemical Composition

Element Composition
Cobalt (Co) Balance
Chromium (Cr) 27.0 - 31.0
Tungsten (W) 3.5 - 5.5
Carbon (C) 0.9 - 1.4
Iron (Fe) 3.0 max
Nickel (Ni) 3.0 max
Silicon (Si) 2.0 max

Cobalt Alloy Nuts Mechanical Properties

Property Value
Hardness (HRC) 38 - 47
Tensile Strength (typical) 860 MPa
Coefficient of Friction (Against Steel) Low
Galling Resistance Excellent
Max Operating Temperature 815ยฐC

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