Invar

Invar is an alloy added and used by Thermal Expansion and GregTech.

Thermal Expansion
Invar Blend can be crafted from 2 Iron Dust and one Pulverized Ferrous Metal. Invar Ingots can also be smelted in the Induction Smelter from 2 Iron Ingots or Iron Dust and 1 Ferrous Ingot or Pulverized Ferrous Metal.

GregTech
Invar Dust can be crafted inefficiently by hand. 2 Iron Dust and 1 Nickel Dust will produce 9 Small Piles of Invar Dust (2.25 Ingots, a 25% loss of materials). Invar Dust can be crafted at full efficiency in the Mixer. Invar Ingots can be smelted in the Alloy Smelter or Steam Alloy Smelter from 2 Iron Ingots or Iron Dust and 1 Nickel Ingot or Nickel Dust. {|