Nickel-Iron Low Expansion Alloy

INVAR 36

UNS K93603

Additional specifications by request

Application

Measuring devices, laser components, bi-metal thermostat strips.

Chemical Composition (Nominal %)

35.0 - 38.0 Ni, 0.10 C max, 0.60 Mg max, 0.025 P max, 0.025 S max, 0.35 Si max, 0.50 Cr max, 0.50 Mo max, 1.00 Co max, Balance Fe

Physical Characteristics

Density

.298 lb/in³

Tempers

*KSI = 1000 psi
Rockwell 30T Grain Size (nominal) Tensile KSI*
Annealed 31 - 46
40 - 58
0.035 mm
0.015 mm
¼ hard 61 - 71 58 - 72
½ hard 67 - 74 66 - 80
hard 72 - 76 75 - 88
extra hard 73 - 77 80 - 92
spring 74 - 77 84 - 94

Sheet/Coil Sizes

Thickness

.002" - 0.062"

Width

7.00" max

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