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Tungsten Heavy Alloys

Material Introduction:

Tungsten heavy alloy is a kind of alloy using tungsten as matrix and adding a small amount of nickel, iron, copper and other alloying elements, with the characteristics such as: high and adjustable density (~ 18.5g/cm³), good absorption ability of high-energy radiation (1/3 higher than the absorptivity of lead ray), low coefficient of thermal expansion (4 ~ 6×10-6/℃), good plasticity, high strength and elasticity modulus, machinability and weldability.

Tungsten Nickel Copper alloys also has non-magnetic property, which make them extensively used in radiation protection with sensitive environment.

Material Property:
- High Density：Max as 18.8 g/cm³
- High Strength：Tensile strength as 700-1000 MPa.
- Excellent Radiation Protection：Tungsten alloy is 1.7 times than Lead in radiation protection capability with same thickness.
- The Coefficient of Thermal Conductivity: The thermal conductivity coefficient of tungsten alloy is 5 times of die steel.
- Small Thermal Expansion Coefficient: Tungsten thermal expansion coefficient is 4~6×10-6/℃, only iron or steel 1/2-1/3.
- Good Plasticity, Machining and Welding Capability.
- Compared with lead toxicity, tungsten alloy is zero damage of environment. Radiation detectors made by tungsten alloy has no harm to human body.
- Compared with tungsten nickel copper alloy, tungsten nickel iron alloy has ferromagnetic property, and the mechanical properties, processing properties are better than tungsten copper nickel alloy.
- Compared with tungsten nickel iron alloy, tungsten nickel copper alloy has unique performance with non–magnetic environment.

Application:

Radiation protection and guidance: Because of its high density (~18.8 g / cm³), and excellent X-ray, gamma ray absorptive capacity, excellent process ability, making Tungsten Nickel Iron alloy become ideal material for radiation therapy collimator and protection components.

Balance weights: It is widely used in automobile crankshaft counterweight, oil weight, security defense, precision optical instruments, due to the magnetic properties, high proportion of tungsten copper nickel alloy especially for in the aviation electron system.

Security and Defense：现代战争中，主要攻击目标是坦克装甲，坚固防御工事及有防护的作战人员，想要获得致命的打击效果,密度大，存速高，侵彻能力强，高性能的材料不可或缺，我们公司生产的钨基高比重材料能完全满足这些需求，是国防军工，安全领域不可或缺的高端材料。

核电及能源用部件：我公司所生产的钨基高比重合金用于3代+核电站所用的冷却系统主泵，由于它具有较高的密度和性能，经过精密机械加工后装置在核电冷却系统的主泵中作为惯性飞轮，以便在核电站突然停电时确保主泵系统能继续工作冷却核电站避免意外发生。

航空航天用部件：钨镍铁合金具有高温强度高及耐冲刷烧蚀等性能，广泛应用于航空航天用部件。

Product Specification:

Normal Tungsten Nickel Iron Alloy Property

Brand	Chemical Component%		Density (g/cm³)	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	HRC Max (HRC)	Magnetic
Brand	W Component	NiFe	Density (g/cm³)	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	HRC Max (HRC)	Magnetic
ATM1700	90	Remain	16.85-17.25	≥758	≥517	≥5	32	Yes
ATM1750	92.5	Remain	17.15-17.85	≥758	≥517	≥5	33	Yes
ATM1800	95	Remain	17.75-18.35	≥724	≥517	≥3	34	Yes
ATM1850	97	Remain	18.25-18.85	≥689	≥517	≥2	35	Yes

High Performance Sintering Tungsten Nickel Iron Alloy Property

Brand	Density (g/cm³)	Tensile Strength (MPa)	Yield Strength Rp0.2(MPa)	Elongation A(%)	Hardness (HRC)	Magnetic
ATM1700	16.85-17.25	900	600	15	≤32	Yes
ATM1750	17.15-17.85	900	600	15	≤33	Yes
ATM1800	17.75-18.35	850	600	10	≤34	Yes
ATM1850	18.25-18.85	800	600	7	≤35	Yes

Tungsten Nickel Copper Alloy Property

Brand	Chemical Component		Density (g/cm³）	Tensile strength （MPa）	Yield strength （MPa）	Elongation rate （%）	Hardness （HRC）	Magnetic
Brand	W	NiCu	Density (g/cm³）	Tensile strength （MPa）	Yield strength （MPa）	Elongation rate （%）	Hardness （HRC）	Magnetic
ATM1701	90	Remain	16.85-17.25	≥648	≥517	≥2	32	No
ATM1751	92.5	Remain	17.15-17.85	≥648	≥517	≥2	33	No
ATM1801	95	Remain	17.75-18.35	≥648	≥517	≥1	34	No

Production Process:

According to customer's drawings, the production process of tungsten shields is divided into seven stages, including material mixing, pressing, sintering, molding, thermal treatment, machining and assembly.

We strictly select and check each batch of raw materials and inspect each technology implementation process, and then after the almost demanding finished product inspection, we ultimately guarantee the high quality of each piece of tungsten shield delivered to the customers.

Our Advantages:

- With sixty-year experiences from AT&M Refractory Materials Branch and thirty-year experiences from TLWM, ATTL manufactures high quality and stable products.
- ATTL has largest and most advanced Tungsten Heavy Alloy R&D and manufacturing equipment in China. We can provide D550mm*680mm size products and our monthly yield capacity is over 300 tons.
- ATTL has advanced machining workshop to produce high accurate Tungsten Heavy Alloy parts to meet different requirements.
- ATTL has excellent quality control system; we get approved by ISO9001, ISO14001 and OHSAS18001 certification system, also the AS9100 and NADCAP system certification and ISO13485, FDA training, to ensure that we provide high quality products.
- ATTL owns advanced quality testing laboratories, including multiple high precision Zeiss CMM, nondestructive testing instrument, the powder particle size analyzer and other equipment to ensure stable quality from raw materials to final product.
- ATTL have undertaken many national research programs every year. We have excellent research and development team, more than 75% of our R&D team has master's degree or higher.

- ATTL has a solid and steady foundation to build the outstanding management team. The rapid development of the enterprise makes it a well-known, large-scale refractory material, domestic and global leading supplier.

Success Case: Alice Project:

In 2004, the company provided seven tons of tungsten heavy alloy shielding parts for the Alice detector of European Organization for Nuclear Research (CERN), including the largest tungsten alloy part with a weight of 1.3 tons. Owing to the excellent product quality and service, the Advanced Technology & Materials Co., Ltd (AT&M) was granted the Award for Best Industry of the Year 2004.。