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High Density Tungsten

High density tungsten alloys are materials with a high tungsten content and low amounts of Ni Fe or Ni Cu.

Advantages

High Density Tungsten Type	90% W 6% Ni 4% Cu	90% W 7% Ni 3% Fe	92.5% W 5.25% Ni 2.25% Fe	93% W Balance Ni Fe Mo	95% W 3.5% Ni 1.5% Cu	95% W 3.5% Ni 1.5% Fe	97% W 2.1% Ni .9% Fe
ASTM-B-777-07	Class 1	Class 1	Class 2	Super Chatter Free	Class 3	Class 3	Class 4
Density Gms/cc	17	17	17.5	17.7	18	18	18.5
Density Lbs/cu. in.	.614	.614	.632	.639	.650	.650	.668
Hardness Rockwell C	24	25	26	30	27	27	28
Ultimate Tensile Strength (PSI)	110,000	125,000	114,000	130,000	115,000	125,000	128,000
Yield Strength .2% offset (PSI)	90,000	88,000	90,000	90,000	85,000	90,000	85,000
Elongation (% in 1")	8	14	12	10	7	12	10
Proportional Elastic Limit (PSI)	45,000	52,000	46,000	60,000	45,000	44,000	45,000
Modules of Elasticity (PSI)	40 x 10 6	45 x 10 6	47 x 10 6	53 x 10 6	45 x 10 6	50 x 10 6	53 x 10 6
Coefficient of Thermal Expansion X 10 -6/°C (20-400°C)	5.4	4.8	4.6	4.5	4.4	4.6	4.5
Thermal Conductivity (CGS Units)	.23	.18	.20	.27	.33	.26	.30
Electrical Conductivity (% IACS)	14	10	13	14	16	13	17
Magnetic Properties	W Ni Cu = NIL W Ni Cu/Fe= Slightly Magnetic	Slightly Magnetic	Slightly Magnetic	Slightly Magnetic	NIL	Slightly Magnetic	Slightly Magnetic