Alloys 42

Brand name	NILO® 42, Invar 42

Trade name	Alloy 42

Standards	Material No. 1.3917 EN Designation Ni 42 UNS K94100 Alloy 42

Description	Alloy 42 / 1.3917 is a nickel-iron alloy with low expansion. (42% nickel)

Special properties	Low coefficient of expansion in low temperatures of 300°C.

Chemical Composition	C % ≤ 0.12 Si ≤ % 0.30 Mn ≤ % 1.00 Ni % 41.0-43.0 Fe % Rest

Mechanical Properties 20°C	Hardness HB 30 ≤ HB 130 0.2% Yield strength Rp ≥ N/mm² 300 Tensile strength Rm N/mm² ≥ 500 Elongation A5 ≥ % 30 Modulus of elasticity kN/mm² 145

Physical Properties 20°C	Density g/cm³ 8.15 Specific heat capacity J/kg K 500 Thermal conductivity W/m K 12.5 Electrical resistivity Ω mm²/m 0.63

Application	Tanks for liquid natural gas, measuring and thermostatic instruments

Available forms for 1.3917 / ALLOY 42	Sheets/Plates Bars Wire Forged / cast parts Finished part (drawing)