Tungsten and Molybdenum have the advantages of high melting point, excellent performance at elevated temperature, low electrical resistivity, lower thermal expansion, low work function of electron emission and low vapor pressure and etc which make tungsten and molybdenum materials be used widely in high temperature field.

When added 1.0% to 2.0% percent of lanthanum oxide (La2O3) by weight, its creep resistance and the recrystallization temperature will be greatly improved. The WL alloy is also easier to machine.

Tungsten tube is widely used as the hot zone, heater and container of the high temperature process. You can see it in the sapphire growing, continuous glass melting and heat treatment furnaces.

Tungsten platform is the bottom of the container by threaded connection with the tube.

The WL Tungsten core alloy rod is the holder, ensuring there is no offset during the glass melting.

− Hot-zone of Sapphire Growing

− Quartz Continuous Melting Furnace

− Components for High Temperature Furnace

Tungsten Die Plate: different density choices

Conventional Density: 17.8 g/cm3~18.3 g/cm3.

Density after special processing: >18.5 g/cm3.

Typical Specification of Tungsten Tube

Diameter(mm)	Thickness(mm)	Length(mm)
≥30	≥2	<1300
≥150	≥5
≥300	≥10
≥400	≥15
≥600	≥20

Note: All size of tungsten tube can be machined to reach high precision.

Tungsten Core Rod:

Forged tungsten core rod, 50mm≤Diameter≤80mm, Length≤2500mm, Maximum Density≥19.0 g/cm3

Typical Specification

Specifications(mm)	Inner Diameter(mm)	Thickness(mm)	Length(mm)
350 Type	325	≥12	≥1200
460 Type	400	≥20
530 Type	460	≥20
560 Type	500	≥20
760 Type	640	≥25

Note: All size of tungsten tube can be machined to reach high precision.

Tungsten and molybdenum semi-finished product is completed by the powder metallurgy process.

We use high tech forging, rolling and heat treatment methods to continue the deep processing，shape the material and improve their performance

We use highly precision mechanical processing technology and equipment to complete the finished product processing

➢ With sixty-year experiences from AT&M Refractory Materials Branch and thirty-year experiences from TLWM, ATTL owns the professional crucible manufacture technology and is the first supplier of tungsten crucible in China.

➢ We have the nation's largest advanced tungsten molybdenum materials production lines which can satisfy your different product requirements.

➢ Precision machining technology, the use of CNC laser cutting, high precision, to ensure that the heat evenly spaced, provides the high environment for the sapphire growing

➢ We can design and improve the hot zone together with you. We have more than 20 thermal field technology engineer always ready for your production line, make recommendations for you.

➢ We never stop footsteps of Technical innovation. As a state-owned company, we take charge the work of domestic refractory metal technology promotion.

➢ Company certificated by the ISO9001, ISO14001 and OHSAS18001 system authentication.