Invar and Covar 36Ni, 32NiCoCu, 29NiCo, 42Ni, 38NiCoCu, 47NiCu, etc. Alloys with a given temperature coefficient of linear expansionAlloy GradeCarbonSiliconManganeseSulphurPhosphorChromeNickelCobaltCupperIronOther elements29NiCo29NiCo-W.29NiCo-W-129NiCo-10,030,300,40 max0,015 max0,015 max0,1 max28,5-29,517,0-18,00,2 maxBalanceAluminum 0,2 max;Titanium 0,1 max.36Ni.36Ni-WNi0,050,300,3-0,60,015 ...