TUNGSTEN HEAVY ALLOY (WHA)
Tungsten heavy alloy is a type of tungsten-based alloy that contains small amounts of nickel, iron, copper, cobalt, molybdenum, chromium, and other elements. Its density reaches 16.5-19.0 g/cm³.
Tungsten alloy is known for its high density, strength, hardness, and good ductility, as well as its excellent electrical and thermal conductivity. It is widely used in aerospace, medical equipment, electronics, mechanical engineering, and other fields.
Our Advantagess, Experience
YATECH MATERIALS produces tungsten heavy alloys (WHA) in various densities and shapes, including blocks, rods, and custom-shaped parts made to order from drawings.
Our fabrication and machining capabilities enable us to provide you with tungsten heavy alloys that meet your specific density and tolerance requirements.
Our advanced and stable pressing and sintering processes enable us to produce high-quality WHA in various standard sizes, available from stock.
We offer WHA Tungsten Heavy Alloys in both ‘Sintered Blank’ and ‘Precision Machined’ shipment standards, which can enhance efficiency and reduce costs for you.
LOW MAG vs. Non-Magnetic WHA: Which Should You Choose?
If you are using Tungsten Heavy Alloy (WHA), you may be confused about the LOW MAG vs. Non-Magnetic options. The two options differ in magnetic permeability: standard W-Ni-Fe grades are magnetic; W-Ni-Cu grades are non-magnetic.
Low Magnetic vs. Non-Magnetic: Which is Best for Your Application?
To determine whether Low Magnetic WHA vs. Non-Magnetic WHA is right for your application, please refer to the case studies. If the existing magnetic field in the radiation generating equipment is undisturbed, then a non-magnetic WHA may be ideal. In addition, nonmagnetic WHA is often used in downhole probes/instruments where the programming chip and/or sensors are shielded. The most obvious case for non-magnetic WHA is magnetometer scanning as the primary application.
What is Non-MAG WHA?
Non-magnetic conventional WHA has a tungsten-nickel-copper composition. Unless the desired application requires non-magnetic properties, magnetic WHA is the ideal solution. Magnetic WHA is often the standard choice.
Mechanical Properties of Tungsten Alloy Grades
| W-Ni-Fe | ||||||
| Grade | Density (g/cm³) | HRA | TRS | Yield Strength | Elongation | Material Features and Recommended Applications |
| YH221 | 18.25-18.85 | 28 - 35 | >800MPa | >650MPa | >5% | Magnetic, high density, excellent corrosion resistance, mainly used as counterweights for large equipment. |
| YH232 | 17.75-18.35 | 27 - 34 | >850MPa | >500MPa | >6% | Magnetic, excellent radiation absorption and machinability; commonly used for radiation shielding and defense applications. |
| YH243 | 17.15-17.85 | 26 - 33 | >900MPa | >550MPa | >13% | Magnetic, with good thermal conductivity and low coefficient of thermal expansion, commonly used for boring-bar tool bodies and other high-precision parts. |
| YH273 | 16.85-17.25 | 24 - 32 | >850MPa | >500MPa | >10% | Magnetic, has high tensile strength and modulus of elasticity, commonly used for all kinds of high precision parts. |
| W-Ni-Cu | ||||||
| Grade | Density(g/cm³) | HRA | TRS | Yield Strength | Elongation | Material Features and Recommended Applications |
| YH132 | 17.75-18.35 | 27 - 34 | >800MPa | >600MPa | >10% | With high density, nonmagnetic, good mechanical performance, usable as counterweights on oil-drill-collar bars, well-perforating charges, tool drag hammers, etc. |
| YH164 | 16.85-17.25 | 24 - 32 | >650MPa | >500MPa | >2% | Non-magnetic, excellent radiation absorption and machinability; commonly used for radiation shielding and defense applications. |
Tungsten Heavy Alloy Grades
Typical values for W-Ni-Fe and W-Ni-Cu (non-magnetic) grades; certificates supplied per shipment.
| Grade | W content | Density (g/cm³) | Hardness (HRC) | UTS (MPa) | Magnetic |
|---|---|---|---|---|---|
| W90 (W-Ni-Fe) | 90% | 17.1–17.3 | 24–32 | 900–1000 | Yes |
| W93 (W-Ni-Fe) | 93% | 17.6–17.8 | 26–34 | 920–1000 | Yes |
| W95 (W-Ni-Fe) | 95% | 18.0–18.2 | 28–36 | 900–980 | Yes |
| W95 (W-Ni-Cu) | 95% | 18.0–18.1 | 26–32 | 650–800 | No (non-magnetic) |
| W97 (W-Ni-Fe) | 97% | 18.5–18.7 | 30–38 | 850–950 | Yes |
Frequently Asked Questions
Which alloy systems do you offer?
W-Ni-Fe and W-Ni-Cu (non-magnetic) alloys at 90–97% tungsten with densities of 16.5–19.0 g/cm³.
Which applications use WHA?
Radiation shielding, collimators, counterweights, gyro components and kinetic energy applications.
Can you supply non-magnetic WHA?
Yes — W-Ni-Cu grades keep magnetic permeability low for MRI and instrument environments.
Do you support custom sizes for tungsten heavy alloy?
Yes. We produce to your drawings (PDF, DWG or STEP). Send specifications and our engineers will confirm feasibility and provide a quote within 24 hours.
What is the MOQ and can I order samples first?
There is no fixed MOQ for standard items. Sample orders are welcome so you can verify quality before volume production; shipping is freight collect.
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