Astm F1684. Standard specifications for iron, Nickel and iron, Nickel, cobalt small heat alloys
This type of precision alloy with specified TCL, in its composition contains base — iron (63−64,5%) and Nickel (35−37%). has a minimum temperature coefficient of expansion (- 1,5x10−6 1/°C at a temperature from minus 80 to + 100°C), which determines its use in the production of control parts, measuring devices. The composition is alloyed with silicon, copper, manganese, aluminum, molybdenum, vanadium.
|basis||35 — 37||≤ 0.1||≤ 0.015||0.3 — 0.6||≤ 0.3||≤ 0.05||≤ 0.15||≤ 0.015||≤ 0.1||≤ 0.1||≤ 0.1|
|t°||E 10— 5||a 10 6||l||r||R 10 9|
E — the Modulus of elasticity of the first kind
a — Coefficient of thermal (linear) expansion
l — Coefficient of thermal conductivity (the heat capacity of the material)
r — share
R — electrical resistivity.
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