Incoloy 825 Springs

Incoloy 825 Springs are specialized mechanical components manufactured by Zeron Fastners, used to store energy and cushion shock, particularly in environments where material failure due to corrosion or stress relaxation is unacceptable. The alloy, Incoloy 825 (UNS N08825), is a high-nickel, chromium, iron, and molybdenum alloy that is exceptionally resistant to a wide range of corrosive conditions. Key advantages include superb resistance to stress-corrosion cracking in chloride media and excellent performance against reducing acids like sulfuric and phosphoric acid, which rapidly degrade standard spring materials. These high-performance springs are vital for use in chemical processing valves, oil and gas well components (downhole springs), marine equipment, and various industrial machinery where high fatigue strength and reliability under extreme chemical and temperature conditions are mandatory.

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Incoloy 825 Springs

Chemical Composition (Incoloy 825 Springs)

Element Composition (%)
Nickel (Ni) 38.0 to 46.0
Chromium (Cr) 19.5 to 23.5
Iron (Fe) Balance
Molybdenum (Mo) 2.5 to 3.5
Copper (Cu) 1.5 to 3.0
Titanium (Ti) 0.6 to 1.2
Carbon (C) 0.05 max

Mechanical Properties (Incoloy 825 Springs)

Property Value (Annealed)
Tensile Strength, min (Alloy) 585 MPa (85 ksi)
Yield Strength (0.2% Offset), min (Alloy) 240 MPa (35 ksi)
Elongation, min 30%
Hardness (Brinell), max 170 HB (95 HRB)
Modulus of Elasticity (E) 195 GPa (28,300 ksi)

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