Tungsten Alloy

Midwest Tungsten Service specializes in high quality heavy metal tungsten alloys. We stock alloy as rod, bar, plate and sheet. Midwest Tungsten Service will custom machine alloy parts to your specifications.

MTS tungsten alloys are ideal for high density applications or for use in radiation shielding. Heavy metal tungsten alloys are 90% to 97% pure tungsten in a matrix of nickel and copper or nickel and iron. The addition of these alloying elements improves both the ductility and machinability of these alloys over non-alloyed tungsten. MTS can custom machine any alloys to finished parts according to your specifications. We carry an extensive inventory of tungsten alloys and provide quick turnaround for those items not in stock. Call or e-mail for more information or with a specific request.

We also manufacture aircraft bucking bars and ballast weights for aircraft, high performance autos, and sailboats made of tungsten alloy.

Name MT-17C MT-17F MT-175 MT-18C MT-18F MT-185
Material 90% W
6% Ni
4% Cu
90% W
7% Ni
3% Fe
92.5% W
5.25% Ni
2.25% Fe
95% W
3.5% Ni
1.5% Cu
95% W
3.5% Ni
1.5% Fe
97% W
2.1% Ni
0.9% Fe
Density, grams/cubic centimeter  17 gm/cc  17 gm/cc  17.5 gm/cc  18 gm/cc  18 gm/cc  18.5 gm/cc
Density; lbs/in3 0.614 0.614 0.632 0.65 0.65 0.668
Mil. Spec. T-21014 D Class 1 Class 1 Class 2 Class 3 Class 3 Class 4
ASTM-B777 Grade 1 Grade 1 Grade 2 Grade 3 Grade 3 Grade 4
Type Type II & III Type II & III Type II & III Type II & III Type II & III Type II & III
Hardness; Rockwell C 24 25 26 27 27 28
Ultimate Tensile Strength; PSI 94,000 125,000 114,000 94,000 125,000 128,000
Yield Strength, .2% Offset; PSI 90,000 88,000 90,000 85,000 90,000 85,000
Elongation, % in 1″ 8 14 12 7 12 10
Proportional Elastic Limit; PSI 45,000 52,000 46,000 45,000 44,000 45,000
Modulus of Elasticity; PSI 40 x 10E6 45 x 10E6 47 x 10E6 45 x 10E6 50 x 10E6 53 x 10E6
Coefficient of Thermal Expansion x 10E-6/°C (20°- 400°C) 5.4 4.8 4.6 4.4 4.6 4.5
Thermal Conductivity; CGS Units 0.23 0.18 0.2 0.33 0.26 0.3
Electrical Conductivity; %IACS 14 10 13 16 13 17
Magnetic Properties NIL Slightly Magnetic Slightly Magnetic NIL Slightly Magnetic Slightly Magnetic