
K1701 Tungsten Heavy Alloy
Elmet Technologies K1701 Tungsten Heavy Alloy (WHA) is a high-density, high-performance material engineered for critical applications demanding exceptional strength and ductility. As a global leader in refractory metals, we leverage our fully integrated, US-owned and operated manufacturing capabilities to produce K1701 at our state-of-the-art, ISO-certified facility in Euclid, Ohio. With over 90 years of expertise and an unwavering commitment to quality, we deliver advanced material solutions that drive innovation in the world’s most demanding industries.

Our K1701 is a Class 1 WHA specifically formulated with a composition of 90% tungsten, balanced with nickel and copper (W-Ni-Cu). This precise alloy composition ensures superior physical properties, making K1701 indispensable for aerospace, defense, medical, and energy applications. By combining the extreme density of tungsten with the enhanced strength and ductility from the nickel-copper binder, K1701 offers unparalleled performance characteristics, providing customers with the reliability they need to succeed in their most challenging projects.
Typical Properties of K1701
| Alloy Description | K1701 | ET90NM | |
| Tungsten Content | % | 90 |
| Density | (g/cm³) | 17.0 |
| (lb/in³) | 0.61 | |
| Hardness | (Rc) | ≤ 32 |
| Ultimate Tensile Strength | (ksi) | ≥ 94 |
| (N/mm²) = Mpa | ≥ 648 | |
| Yield Strength | (ksi) | ≥ 75 |
| (N/mm²) = Mpa | ≥ 517 | |
| Elongation | (%) | ≥ 2 |
| Modulus of Elasticity | (psi x 10^6) | 40 |
| (kN/mm²) | 280 | |
| Magnetic Properties | none | |
| Magnetic Permeability | (µ) | ≤ 1.05 |
| Thermal Expansion Coefficient | (x10^-6/K) (20ºC-500ºC) | 5.4 |
| Thermal Conductivity | (cgs) | 0.23 |
| Electrical Conductivity | (% IACS) | 14 |
| MIL-T-21014 | class | 1 |
| ASTM B777 | class | 1 |
| ASTM-T-21014 | class | 1 |
| AMS 7725 | Class 1 Type 1 | |
| Nominal Chemical Composiition | Ni content % Fe content % Cu content % Co content % W content % | 6.7 | 8.9 0.2 | 1.1 2.6 | – 0.2 | – 90.2 | 90.0 |
| Other Material Names | HA170C, HD 17, Dens21, CMW 1000, K1701, M1000, MT-17C, EA17 |
Other chemical compositions are available upon request. To view the full data table, click the link below.
Key Benefits of K1701 Tungsten Heavy Alloy
At Elmet Technologies, our K1701 alloy is engineered to deliver superior performance in the most critical environments.
- Exceptional Strength & Mechanical Integrity: Engineered for durability, this alloy resists deformation and fatigue, delivering reliable performance under stress.
- Superior Durability: Offers excellent wear and corrosion resistance, extending component life and reducing maintenance.
- Advanced Machinability: K1701 is easier to machine than pure tungsten, allowing for intricate, custom geometries.
- Environmental Compliance: It is lead-free, environmentally friendly, and meets strict safety standards.
- Industry Versatility: Trusted in aerospace, defense, and medical sectors for consistent quality and reliability.



High-Performance K1701 Tungsten Heavy Alloy
At Elmet Technologies, we proudly engineer our K1701 tungsten heavy alloy to deliver an unparalleled combination of performance and reliability. Composed of 90% tungsten with additions of nickel and copper, this high-density material offers exceptional tensile strength, ductility, and superior machinability compared to pure tungsten. Produced using advanced powder metallurgy techniques, K1701 is a lead-free, environmentally compliant material utilized across the aerospace, defense, and medical industries. At our ISO-certified facility in Euclid, Ohio, we fabricate intricate, high-quality components designed to meet the most demanding requirements.
Unmatched Versatility for Critical Applications
K1701 is a versatile, high-quality material used in a wide range of applications, including:
- Aerospace: K1701 serves as an ideal material for counterweights and balance weights in aircraft, where its high density allows for precise weight distribution in compact spaces.
- Defense: In defense applications, the material’s integrity and density are crucial. It is frequently specified for components within defense systems and other high-inertia parts where reliability is paramount.
- Medical: The excellent radiation absorption properties of K1701 make it a superior choice for radiation shielding in medical imaging and therapy equipment.
- Energy: Within the energy sector, K1701 is utilized in applications that require high-density materials capable of withstanding extreme conditions.

Partner with Elmet Technologies For Advanced K1701
Elmet Technologies delivers K1701, a high-performance tungsten heavy alloy engineered for critical applications. Its high density, exceptional strength, and versatility make it the ideal solution for components in the aerospace, defense, medical, and energy industries. As a fully integrated, US-based manufacturer with over 90 years of expertise, we leverage our state-of-the-art facility in Euclid, Ohio, to deliver unmatched quality and innovation. Choose Elmet Technologies for reliable, high-performance tungsten heavy alloys that meet the most demanding technological needs.










