Precision 4j36 Alloy Steel Plate 1250mm Invar 36 Plate Sheet For Pharmaceutical Equipment

4J36 is a special low expansion iron nickel alloy with an ultra-low coefficient of expansion. The control of carbon and manganese components is critical. Cold deformation can reduce the coefficient of thermal expansion, while heat treatment within specific temperature ranges stabilizes thermal expansion properties.

The main chemical components include iron, nickel, and cobalt, with nickel content typically 35.0%-37.0%. Within -100°C to 200°C, its average coefficient of linear expansion is approximately 1.2 x 10^-6/°C.

4J36 alloy features high tensile strength (490-680 MPa) and yield strength (≥240 MPa). Elongation rate ranges 25%-35%, with hardness of 130-180 HB (annealed) and 170-200 HB (cold-rolled). These properties enable the alloy to withstand significant forces while maintaining stability.

• Homogenization treatment: Heating above solution line temperature to ensure uniform component distribution
• Rapid cooling: Quenching to preserve solid solution microstructure
• Aging treatment: Adjusts microstructure to improve mechanical properties
• Annealing treatment (optional): Reduces hardness and improves toughness

• Precision manufacturing (sensors, measuring instruments)
• Electronic packaging components
• Aerospace vehicle components
• Optical instruments (lens holders, support frames)

While corrosion-resistant in dry air, 4J36 requires protective measures in humid environments. It can be welded using all standard processes (TIG, MIG, plasma), with low heat input and interlayer temperature below 120℃ recommended.

Fe-Ni36 (France), W.Nr.1.3912 (Germany), Ni36 (Germany), X1NiCrMoCu, N 25-20-7 (UK), UNSK93600 thermostat alloy (USA).