Inconel spring wire

High Temperature Alloy

A286, Elgiloy, Hastelloy, Inconel, Kanthal, MP35N, NACE MR0175, & Monel

High-temperature alloy spring wires such as A286 and the Inconel® series are specifically engineered for spring applications that must maintain strength, elasticity, and fatigue resistance under extreme temperature and corrosive operating conditions.

A286, an iron-nickel-chromium precipitation-hardening alloy, provides excellent mechanical properties and oxidation resistance at temperatures up to approximately 700°C (1300°F), making it a popular choice for aerospace, gas turbine, automotive exhaust, and industrial processing equipment springs.

Inconel alloys, including Inconel 600, 625, 718, and X-750, offer even greater resistance to oxidation, corrosion, and creep at elevated temperatures, making them ideal for critical applications in jet engines, nuclear power systems, oil and gas equipment, and chemical processing plants.

These alloys retain a high percentage of their spring force and dimensional stability under prolonged thermal exposure, where conventional stainless steel and carbon steel spring wires would experience significant loss of performance. As a result, high-temperature alloy spring wires are selected for mission-critical applications requiring long service life, reliability, and consistent spring behavior in severe thermal and corrosive environments.

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Material A 286 ALLOY INCONEL 600 INCONEL 718 INCONEL X-750
Standard QQ-W-390 AMS 5698, 5699
Nominal Analysis Ni -- 26.0% Ni -- 76.0% Ni -- 52.5% Inconel X-750
Cr -- 15.0% Cr -- 15.8% Cr -- 18.6% AMS 5698,5699
Fe -- 53.0% Fe -- 7.2% Fe -- 18.5%
Minimum Tensile Strength 160-200 170-230 210-2500 No.IT 155 min.
Spg.T 190-230
Modulus of Elasticity E 29 31 29 31
psi x 103
Design Stress % Minimum 35 40 40 40
Tensile
Modulus in Torsion 10.4 11 11.2 12
G psi x 106
Maximum Temp. °F 950 700 1100 750-1100
Maximum Temp. °C 510 371 593 399-593
Rockwell Hardness C35-42 C35-45 C45-50 C34-39
C42-48
Method of Manufacture Cold drawn and precipitation hardened after fabrication. Good corrosion resistance at elevated temperature. Cold drawn. Good corrosion resistance at elevated temperature. Cold drawn and precipitation hardened after fabrication. Good corrosion resistance at elevated temperature. Cold drawn and precipitation hardened after fabrication. Good corrosion resistance at elevated temperature

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