Premium ASTM F1684 4J36 Invar Alloy - Ultra-Low Thermal Expansion

High-precision iron-nickel alloy wire/rods/bar with 36% nickel content (UNS K93600), meeting strict ASTM F1684 standards for exceptional dimensional stability. Ideal for precision instruments, aerospace components, and scientific equipment requiring minimal thermal expansion.

Superior cold-working properties enable flawless spring wire formation, while vacuum-melted material ensures consistent welding rod performance. Machinable bars maintain structural integrity across extreme temperature ranges (-200°C to +200°C).

Essential for laser equipment, cryogenic engineering, and watchmaking. Bulk orders available for industrial manufacturers seeking cost-effective solutions without compromising metallurgical quality. Custom diameters and lengths upon request.