INVAR Electroplated Foils

Quality and Deposits Characteristics

• Density of 8.1 g/cm3
• Composition (Wt. %) of 64%Fe, 36%Ni
• Linear Thermal Expansion (10-6, K-1) of 0.4±0.1
• Specific Heat Capacity (J/gK) at 573 K of 0.45 ±0.05
• Thermal Conductivity (W/mK) of 43 ± 5
• Internal stress (MPa) of 30 ± 2
• Tensile Strength (MPa) of 715 ± 60
• Tensile Yield Strength (MPa) of 702 ± 50
• Elongation (%) of < 10

Features and Benefits

• Deposits have low internal stress 
• Near-zero linear thermal expansion in plated alloy films
• Surfaces are uniform and smooth with well-controlled thickness and excellent uniformity

General description

INVAR foils are low stress, smooth and pinhole-free with extremely low coefficients of thermal expansion.