High-Density Tungsten Based Metals
Mi-Tech high-density metals are high -strength, machinable, tungsten based materials used when high density and strength are required.
Typical Properties*
| HD 17 | HD 17BB | HD 17D | HD 17.5 | HD 17.7 | HD 18 | HD 18D | HD 18.5 | |
|---|---|---|---|---|---|---|---|---|
| 90% W 6% Ni 4% Cu |
90% W 6% Ni 4% Cu/Fe |
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 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 (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 | HD 17 = NIL HD 17BB = Slightly Magnetic |
Slightly Magnetic |
Slightly Magnetic |
Slightly Magnetic |
NIL | Slightly Magnetic |
Slightly Magnetic |
|
*Properties may vary according to size and shape of part.
Composition shown is typical and may change for manufacturing purposes or to meet physical and/or application requirements.
If non-magnetic material is required, it should be specified.
