For heat treatment adopt the water quench route and followed by stress relieving.

If you need more details,I shall share whatever little I know.
Good Luck!

kenat from GD&T to casting Invar,you are travelling a long way. It is possible to cast Super Invar and one can prepare their own alloy,instead of buying ingots. Only care is pick up of gases during melting and pouring. hey could add Nickel oxide or Iron Oxide and possibly purge with Argon gas. It will be wonderful,if they have vacuum melting facility.For heat treatment adopt the water quench route and followed by stress relieving.If you need more details,I shall share whatever little I know.Good Luck!

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Invar 36

UNS #K

Invar 36 is a 36% nickel-iron alloy with a rate of thermal expansion approximately one-tenth that of carbon steel at temperatures up to 400°F (204°C). This alloy is used for applications where dimensional changes due to temperature variation must be minimized or in conjunction with high expansion alloys in applications where a motion is desired when the temperature changes.

Type Analysis

• Carbon (Maximum)

  0.02

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• Silicon (Maximum)

  0.2

• Nickel (Nominal)

  36

• Manganese (Maximum)

  0.35

• Iron (Nominal)

  Balance

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