Tungsten heavy alloys are 90% to 97% pure tungsten in a matrix of nickel and copper, or nickel and iron. Pure tungsten is very difficult to machine or fabricate.  Addition of these elements improves both the ductility and machinability of the alloys, while retaining its high density.  These heavy alloys are ideal for high density or radiation shielding applications where machining is required.

 

TUNGSTEN HEAVY METAL ALLOYS & PROPERTIES

Admat Alloy Name ADM-17 ADM-17M ADM-17.5M ADM-17.7M ADM-18 ADM-18M ADM-18.5M
ASTM-B-777 Class 1 Class 1 Class 2 N/A Class 3 Class 3 Class 4
AMS-T-21014 Class 1 Class 1 Class 2 N/A Class 3 Class 3 Class 4
AMS-7725 Class 1, Type 1 Class 1, Type 2 Class 2, Type 2 N/A Class 3, Type 1 Class 3, Type 2 Class 4, Type 2
MIL-T-21014 Class 1 Class 1 Class 2 N/A Class 3 Class 3 Class 4
Magnetic Properties Non-Magnetic Slightly Magnetic Slightly Magnetic Slightly Magnetic Non-Magnetic Slightly Magnetic Slightly Magnetic
Alloy Composition W 90% W 90% W 92.5% W 93% W 95% W 95% W 97%
Ni 6% Ni 7% Ni 5.25% Balance is Ni 3.5% Ni 3.5% Ni 2.1%
Cu 4% Fe 3% Fe 2.25% Ni / Fe/ Mo Cu 1.5% Fe 1.5% Fe .9%
Density (Grams /Centimeter3) 17 17 17.5 17.7 18 18 18.5
Density (Lbs/Inch3) 0.614 0.614 0.632 0.639 0.65 0.65 0.668
Hardness (Rockwell C) 24 25 26 30 27 27 28
Ultimate Tensile Strength (PSI) 110K 125K 114K 130K 115K 125K 128K
Yield strength .2% offset (PSI) 90K 88K 90K 90K 85K 90K 85K
Elongation (% in 1") 8 14 12 10 7 12 10
Proportional Elastic Limit (PSI) 45K 52K 46K 60K 45K 44K 45K
Modulus of Elasticity (PSI) 40 X 106 45 X 106 47 X 106 53 X 106 45 X 106 50 X 106 53 X 106
Coefficient of Thermal Expansion x 10-6/°C 5.4 4.8 4.6 4.5 4.4 4.6 4.5
Thermal Conductivity (CGS Units) 0.23 0.18 0.2 0.27 0.33 0.26 0.3
Electrical Conductivity (% IACS) 14 10 13 14 16 13 17

For sales contact Admat at (484) 322-2091 or by email at [email protected]