Tungsten Alloy Physical and Chemical Properties as per ASTM B777-15

(Also known as Mallory 1000®, Densalloy®, Fansteel 77® and Densimet®)

Tungsten Alloy Physical Properties

Tungsten Alloy mechanical properties - tensile strength, ductility, hardness - compare favorably to common engineering materials such as steel.

EFI Grade
ASTM B777-15 Class
Nominal Density GM/CC
Minimum Yield Strength KSI (MPa)
Minimum Ultimate Tensile Strength KSI (MPa)
Minimum Elongation %
Modulus of Elasticity KSI (MPa)
Class Hardness Rockwell "C" Max

EF 17

1

17.00

75 (648)

110 (758)

5

45 (310)

32

EF 17N*

1

17.00

75 (648)

94 (648)

2

45 (310)

32

EF 175

2

17.50

75 (648)

110 (758)

5

48 (331)

33

EF 175N*

2

17.50

75 (648)

94 (648)

2

48 (331)

33

EF 18

3

18.00

75 (648)

105 (724)

3

50 (345)

34

EF 18N*

3

18.00

75 (648)

94 (648)

2

50 (345)

34

EF 185

4

18.50

75 (648)

100 (689)

2

52 (358)

35

Note: Typical Hardness for all grades is RC 32 Max

Tungsten Alloy Chemical Properties

EFI Grade
Nominal % Tungsten

EF 17

90

EF 17N*

90

EF 175

92.5

EF 175N*

92.5

EF 18

95

EF 18N*

95

EF 185

97

*N – Non-Magnetic Compositions