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Coefficient of Thermal Expansion 

 
Material
10-6 in./in.*/°F
10-5 in./in.*/°C
High
Low
High
Low
Zinc & its Alloys 19.3 10.8 3.5 1.9
Lead & its Alloys 16.3 14.4 2.9 2.6
Magnesium Alloys 16 14 2.8 2.5
Aluminum & its Alloys 13.7 11.7 2.5 2.1
Tin & its Alloys 13 2.3
Tin & Aluminum Brasses 11.8 10.3 2.1 1.8
Plain & Leaded Brasses 11.6 10 2.1 1.8
Silver 10.9 2.0
Cr-Ni-Fe Superalloys 10.5 9.2 1.9 1.7
Heat Resistant Alloys (cast) 10.5 6.4 1.9 1.1
Nodular or Ductile Irons (cast) 10.4 6.6 1.9 1.2
Stainless Steels (cast) 10.4 6.4 1.9 1.1
Tin Bronzes (cast) 10.3 10 1.8 1.8
Austenitic Stainless Steels 10.2 9 1.8 1.6
Phosphor Silicon Bronzes 10.2 9.6 1.8 1.7
Coppers 9.8 7.7 1.8 1.4
Nickel-Base Superalloys 9.8 1.8
Aluminum Bronzes (cast) 9.5 9 1.8 1.6
Cobalt-Base Superalloys 9.4 6.8 1.7 1.2
Beryllium Copper 9.3 1.7
Cupro-Nickels & Nickel Silvers 9.5 9 1.7 1.6
Nickel & its Alloys 9.2 6.8 1.7 1.2
Cr-Ni-Co-Fe Superalloys 9.1 8 1.6 1.4
Alloy Steels 8.6 6.3 1.5 1.1
Carbon Free-Cutting Steels 8.4 8.1 1.5 1.5
Alloy Steels (cast) 8.3 8 1.5 1.4
Age Hardenable Stainless Steels 8.2 5.5 1.5 1.0
Gold 7.9 1.4
High Temperature Steels 7.9 6.3 1.4 1.1
Ultra High Strength Steels 7.6 5.7 1.4 1.0
Malleable Irons 7.5 5.9 1.3 1.1
Titanium Carbide Cermet 7.5 4.3 1.3 .8
Wrought Irons 7.4 1.3
Titanium & its Alloys 7.1 4.9 1.3 .9
Cobalt 6.8 1.2
Martensitic Stainless Steels 6.5 5.5 1.2 1.0
Nitriding Steels 6.5 1.2
Palladium 6.5 1.2
Beryllium 6.4 1.1
Chromium Carbide Cermet 6.3 5.8 1.1 1.0
Thorium 6.2 1.1
Ferritic Stainless Steels 6 5.8 1.1 1.0
Gray Irons (cast) 6 1.1
Beryllium Carbide 5.8 1.0
Low Expansion Nickel Alloys’ 5.5 1.5 1.0 .3
Beryllia &, Thoria 5.3 .9
Alumina Cermets 5.2 4.7 .9 .8
Molybdenum Disilicide 5.1 .9
Ruthenium 5.1 .9
Platinum 4.9 .9
Vanadium 4.8 .9
Rhodium 4.6 .8
Tantalum Carbide 4.6 .8
Boron Nitride 4.3 .8
Columbium & its Alloys 4.1 3.8 .7 .68
Titanium Carbide 4.1 .7
Steatite 4 3.3 .7 .6
Tungsten Carbide Cermet 3.9 2.5 .7 .4
Iridium 3.8 .7
Alumina Ceramics 3.7 3.1 .7 .6
Zirconium Carbide 3.7 .7
Osmium and Tantalum 3.6 .6
Zirconium & its Alloys 3.6 3.1 .6 .55
Hafnium 3.4 .6
Zirconia 3.1 .6
Molybdenum & its Alloys 3.1 2.7 .6 .5
Silicon Carbide 2.4 2.2 .4 .39
Tungsten 2.2 .4
Electrical Ceramics 2 .4
Zircon 1.8 1.3 .3 .2
Boron Carbide 1.7 .3
Carbon and Graphite 1.5 1.3 .3 .2
 

 

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