Tungsten Heavy Alloy

We are tungsten heavy alloy manufacturer in China that offers diferent shapes of tungsten heavy alloy parts. Our factory produces tungsten alloy rods, tungsten alloy sheets, tungsten alloy flats, tungsten alloy plates and fabricated tungsten alloy products.

Tungsten Alloy Rods

Tungsten Alloy Tubes

Tungsten Alloy Sheet

Tungsten Alloy Plates

Tungsten Alloy Rings

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All You Need to Know About Tungsten Heavy Alloys

Tungsten heavy alloy is produced to be a choice of pure tungsten. Pure tungsten has high hardness and is difficult to machine. Tungsten heavy alloy is different. It still maintains the advantages of pure tungsten like high density and radiation shielding but also has the edge to be more machinable and less expensive.
We have been producing tungsten heavy alloys from powder to billets and billets to finished parts with high accuracy.

It is a pseudo-alloy of tungsten with a nickel-iron or nickel-copper. With iron, the metal can be magnetic. Tungsten heavy alloy has four grades: Class 1, 2, 3, and 4. We produce all of these grades conforming to ASTM B777 or other standards. The alloy can be manufactured into different forms like sheets, plates, blocks, rods, cubes, rings, or other required parts.

We have many years of production experience in turning powder into finished parts by metallurgy.

In all processes, we pay much attention to details and devote ourselves to the highest accuracy and bring our customers uncompromising quality and constant stability.

In the passages below, we will introduce the properties, applications, production process, product classification, and points to consider when purchasing.

Tungsten Heavy Alloy Properties

Umetal Alloy	UME-17C	UME-17F	UME-175	UME-18C	UME-18F	UME-185
ASTM B777; AMS-T-21014 Class	Class 1	Class 1	Class 2	Class 3	Class 3	Class 4
Material	90WNiCu	90WNiFe	92.5WNiFe	95WNiCu	95WNiFe	97WNiFe
W content	90% W	90% W	92.5% W	95% W	95% W	97% W
Ni content	6% Ni	7% Ni	5.25% Ni	3.5% Ni	3.5% Ni	2.1% Ni
Cu/Fe content	4% Cu	3% Fe	2.25% Fe	1.5% Cu	1.5% Fe	0.9% Fe
Density, g/cm3	17 gm/cc	17 gm/cc	17.5 gm/cc	18 gm/cc	18 gm/cc	18.5 gm/cc
Density; lbs/in3	0.614	0.614	0.632	0.65	0.65	0.668
Mil. Spec. T-21014 D	Class 1	Class 1	Class 2	Class 3	Class 3	Class 4
ASTM-B777	Grade 1	Grade 1	Grade 2	Grade 3	Grade 3	Grade 4
Type	Type II & III	Type II & III	Type II & III	Type II & III	Type II & III	Type II & III
AMS 7725C	Type 1	Type 2
Hardness; Rockwell C	24 (32 max)	25 (32 max)	26 (33 max)	27 (34 max)	27 (34 max)	28 (35 max)
Ultimate Tensile Strength; PSI, min.	94000	110000	110000	94000	105000	100000
Yield Strength, .2% Offset; PSI, min.	75000	75000	75000	75000	75000	75000
Elongation, % in 1”	>2	>5	>5	>2	>3	>2
Proportional Elastic Limit (PSI)	45000	52000	46000	45000	44000	45000
Modulus of Elasticity (PSI)	40 x 10^6	45 x 10^6	47 x 10^6	45 x 10^6	50 x 10^6	53 x 10^6
Coefficient of Thermal Expansion x 10E-6/°C (20°- 400°C)	5.4	4.8	4.6	4.4	4.6	4.5
Thermal Conductivity (cal/scmK)	0.23	0.18	0.2	0.33	0.26	0.3
Electrical Conductivity (%IACS)	14	10	13	16	13	17
Magnetic Properties	NIL	Slightly Magnetic	Slightly Magnetic	NIL	Slightly Magnetic	Slightly Magnetic

Tungsten Heavy Alloy
Advantages

With unique features, tungsten heavy alloy is widely used in wide industries. Here we would like to list several properties.

High density (17.0-18.8g/cm3)

No radiation

Better machinability

High absorption capacity

High modulus of elasticity

Excellent mechanical properties

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Tungsten Heavy Alloy Applications

Industrial applications:

Aircraft control surfaces
Helicopter rotor systems
Ship ballasts
Crankshaft balancing
Turbine balancing
Racing chassis weights
Gyroscope rotors
Inertial energy storage systems

Radiation Shielding Applications:

Nuclear testing equipment
X-ray apparatus, e.g. shielding parts in radiation therapies
Nuclear energy and its applications
Storage of energetic radiation emitters
Collimators
Shielding blocks
Oil well logging instrumentation

Industrial Tooling:

Boring bars
Toolholders with long overhangs
Shanks for grooving tools and carbide inserts
Grinding spindles and turning spindles
Turning and milling draw-in arbors
Disk-blade holders for gear-shaping machines
Extension shanks
Reamer holders

Defense-related Products:

Heavy Tungsten Alloy Penetrators
Heavy Tungsten Alloy Ammunition
Heavy Tungsten Alloy Blast Rings
Heavy Tungsten Alloy Buffer Weights
Heavy Tungsten Alloy Guide Rods for 9MM
Heavy Tungsten Alloy Bullet Cores

Tungsten Heavy Alloy Production Process

From powder to finished parts, every step we care.

Production process: weighing powder, mixing powder, pressing powder, sintering, machining, and inspection.
From accurately weighing raw materials and applying exacting temperatures at different stages, to precise machining and extensive quality control systems, attention to detail is key to ensuring finished tungsten heavy alloy parts meet the standards required by our customers.

1. Material Preparation

Our tungsten powder, nickel powder, iron powder, copper powder are sourced from selected trustworthy suppliers. In incoming inspection, all powders are with certificates. Our inspectors double check its purity, particle size and distribution, apparent density, and flow characteristics. Then we need to blend these powders together along with additives based on process form.

2. Pressing

Based on finished parts, a certain weight of the pre-mixed powder is loaded into a die cavity. The mold can be big or small which is decided by the size of the part. Normally if the size is big, we put the powder in a mold into a CIP. If it is small, we use an automatic pressing machine to press it. After pressing, the alloy powder forms a compact shape but is still fragile. It needs attention when handling.

3. Sintering

For small parts, we will sinter in muffle furnaces. If large parts, we have sintering furnaces. In the sintering, tungsten alloy powder billets become a dense and compacted part. Furnace temperature and time are very important for the quality of the parts.

4. Machining

For products with not-so-high accuracy dimension requirements, we can achieve this by sintering in the designed mold along with rough machining.

But if there is a complex and sophisticated shape, we have a full line of CNC and conventional machining equipment to reach the most demanding designs through the most efficient production ways possible.

5. Inspection and Package

For finished parts, we do random check about the surfaces, dimensions, and other requirements based on process form.

If there is defective part found, we will increase the inspection rate.

After checking, we pack the parts and make sure their package is firm.

Considerations When Buying Tungsten Heavy Alloy

#1 Material
What is the material? Which grade? In this page, we have listed properties table for tungsten heavy alloy. It is easy to find the suitable grade for your application.
#4 Application
What is the application of the part? If you are not clear about the application, pls get to know the property requirements like density, hardness, tensile strength and elongation, and more you know. Each application has different property requirements. And if you are not clear about these too, you can consult us and tell us which performance you want to achieve, we will give our professional and experienced advice.
#2 Dimensions
- If simple shapes like wire, or rod, we need to know their diameter, length, tolerances,
- If sheet, plate, or cube, we need to know its thickness, width, length, and tolerances.
- If complex shapes, we need drawings.
#5 Oxidation
Tungsten heavy allloy is not that easy to oxide as tungsten. But it still oxides. After cleaning, it must be dried completely. If not, it is common to see an oxidized surface. If you face the same problems, you can consult us either and we provide our professional advice to you to deal with it.
#3 Surfaces
- For tungsten heavy alloy sheets or plates, there are sintered surfaces, lathed surfaces, milled surfaces, and grinded surfaces. The sintered surface is just after sintering and normally customers do not buy this type. But it is also the cheapest. The lathed surface is to get a thin and long sheet. And the lathing process increases the density and get a denser inner structure. The milled surface and grinded surface are for the thicker plate. Throught these processed, the part can reach a higher accuracy.
- For tungsten heavy alloy rods, we offer sintered surface, machined surface, and grinded surface. The differences are the surfaces and their tolerances. The later, the better surfaces and higher accuracy.
#6 Price Validity
When you come to know the prices, you must ask about the validity. Tungsten heavy alloy is mainly made of tungsten. Tungsten is an expensive metal and it varies with the material powder.
#7 Package
Tungsten heavy alloy is not brittle as tungsten. It is relatively soft because of the addition of nickel, copper or iron. If bump against each other, it is still ppossible to see marks and dents. We usually use thick foam to separate parts and make sure they will not bump into each other when facing violent transportation. We have cartons and wooden boxes based on customers’ choice. And after packaging, we will use iron or plastic bonds to strengthen it.

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Tungsten Heavy Alloy
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