Baoji DINGDING titanium products Co. Ltd. official website—

Product size and tolerance
thickness	Thickness tolerance	width	width tolerance	length	Length tolerance	Supply state
＜0.2	±0.02	10~150	±2	500	±2	cold rolling
0.3	±0.03	10~250	±2	500	±2
0.4	±0.04	10~250	±2	500	±2
0.5	±0.05	10~300	±2	500	±2
0.8	±0.07	10~300	±0.5	500	±0.5
1.0	±0.08	10~300	±0.5	600	±0.5
1.5	±0.12	10~400	±0.5	600	±0.5
2.0	±0.12	10~500	±0.5	700	±0.5
3.0	±0.20	10~500	±0.5	600	±0.5	Hot-rolling
4.0	±0.30	10~500	±0.5	600	±0.5
≥5.0	±0.40%	10~550	±0.5	600	±0.5

Production process and equipment
Serial number	Production process	Production equipment	Quality inspection point
1	Tungsten billet (raw material)		1.the physical and chemical properties, 2.the length and width of the slab; 3.surface quality; 4.billet single weight;
2	test
3	Hot-rolling	Two roll reversible hot rolling mill	1.thick and wide; 2.the surface crack, the head layer, the black point press into. 3.slanting rolling; 4.flatness;
4	Leveling and annealing	Straight heat box type retreating furnace
5	Alkali washing	Horizontal alkali bath furnace
6	test
7	Warm rolling	Four roll reversible cold rolling mill	1. Long, wide and thick; 2.edge crack, head peeling, pressure pit; 3.flatness;
8	Leveling annealing	Straight heat box type retreating furnace
9	test
10	cold rolling	Four roll reversible cold rolling mill	1, product density; 2. Long, wide and thick; 3.peeling, pressing pits, surface quality; 4. Roll printing and stress; 5.flatness; 6.Produce a certificate of quality;
11	cut	Hydraulic shearing machine
12	Vacuum annealing	Horizontal Vacuum Annealing Furnace
13	Machining	Wire cutting, plane grinding, etc
14	test
15	Packing

After rolling, the density of tungsten plate is basically close to the theoretical density of tungsten when the deformation is more than 60%. Therefore, it has high strength, uniform internal structure and excellent high temperature creep resistance, which is widely used in the production of the cover plate in the sapphire crystal growth furnace, the tropics in the vacuum furnace, the connector, the sputtering target for plasma coating, and the evaporation of tungsten boats.

tungsten rod:

Product physical and chemical properties 1, forging state tungsten rod 1.1 Purity: W > 99.95%; 1.2 density: more than 19.0g/cm3; 1.3 straightness: < 1%; 2, sintered tungsten bar 2.1 Purity: W > 99.95%; 2.2 density: > 18.3g/cm3; 2.3 straightness: < 2%

Product size and tolerance
Forged or sintered state	＜20	±0.1	2000
	20~30	±0.1	1200
	30~60	±0.1	1000
	60~70	±0.2	800
	70~90	±0.2	600
	＞90	Customizing according to customer requirements

Sintered tungsten rod
	Serial number	Production process	Production equipment	Quality inspection point
	1	Tungsten powder (raw material)		1. Purity of tungsten powder 2. after batch of tungsten powder Fsss
	2	Sieving	High frequency vibrating screen
	3	Blending	V type mixer
	4	test
	5	Isostatic pressing	Isostatic press	1. Outer size; 2. single weight; 3. Surface quality;
	6	test		1. Outer size; 2. single weight; 3. Surface quality;
	7	Medium frequency sintering	Medium frequency induction sintering furnace	1. Outer size, single weight and density; 2. straightness; 3. Surface quality; 4. Produce a certificate of quality;
	8	Straightening	200 ton four column press
	9	test
	10	Packing
Forged tungsten rod	1	Sintered tungsten		1, product density; 2. Outer size; 3. straightness; 4. Surface quality; 5. Produce a certificate of quality;
	2	rod	Rotary forging equipment or forging hammer
	3	Machining	A lathe, grinder, etc
	4	test
	5	Packing

Sintered tungsten rods are mainly used for drawing tungsten wires and forged tungsten rods. Because of the high melting point characteristic of tungsten metal itself, the forging tungsten rod with high purity, high density and excellent resistance to high temperature creep is widely used in the tungsten crucible support in the sapphire growth furnace, the electrode in the high temperature furnace, the heating element, the connector, the supporting rod and so on.

tungsten rod:

Product Name: tungsten tube
Product category: a series of sapphire furnace growth
Brand: W-1
Density: 18.0g/cm3
Specifications: Crucible:: (80-600) mm x L (80-1000) mm dimension tolerance: + 0.5mm.
Tube:: (25-500) mm x L (100-1000) mm dimension tolerance: + 0.5mm.
Application: mainly used for sapphire crystal growth furnace, rare earth metal smelting, induction furnace heating body, quartz glass melting, etc., as high temperature container. Especially for the sapphire single crystal growth furnace, the tungsten crucible with high purity, high density, no internal crack, accurate size, smooth inside and outside wall, and so on, has played a key role in the success rate of crystal growth, the quality control of the crystal, the dehydration and the service life of the sapphire crystal. This product is made of FW-1 raw material in tungsten powder.
With the rise and rapid development of the LED industry, the tungsten crucible and tungsten pipe produced by our company rely on the quality of raw materials, fine quality, skilled operation of technical workers and strict quality inspection standards before the factory. It is well received by customers at home and abroad.

Tungsten wire:

Size: 0.05mm Application: mainly used for electronic tube drawing line, special lamps such as tungsten wire for halogen lamp, tungsten heat body in high temperature furnace, tungsten wire for vacuum evaporation of electronic industry, welding electrode, white gold contact of automobile engine and other kinds of electric contact of various kinds of electrical appliances. Uses: 1.. Manufacture electric light source and electric vacuum part 2., use 2. as high temperature heating body and high temperature structural part 3.. Appearance: tungsten wire is coated with graphite milk and has a more uniform black.

chemical composition
Grade	Tungsten content	Impurity element content
Grade	Tungsten content	Total content	Content of each element
WAL1、WAL2	≥99.95%	≤0.05%	≤0.01%
W1	≥99.95%	≤0.05%	≤0.01%
W2	≥99.92%	≤0.08%	≤0.01%
Note: potassium inomission content

Diameter of tungsten wire and tolerance tolerance
diameter (μm)	Weight of 200mm filaments	200mm wire weight tolerance (%)			Diameter tolerance（％）
diameter (μm)	Weight of 200mm filaments	0	Ⅰ	Ⅱ	0	Ⅰ	Ⅱ
5≤d≤12	0.075~0.44	－	±4	±5	－	－	－
12<d≤18	>0.44~0.98	－	±3	±4	－	－	－
18<d≤40	>0.98~4.85	±2	±2.5	±3	－	－	－
40<d≤80	>4.85~19.39	±1.5	±2.0	±2.5	－	－	－
80<d≤300	>19.39~272.71	±1.0	±1.5	±2.0	－	－	－
300<d≤350	>272.71~371.79	－	±1.0	±1.5	－	－	－
350<d≤500	－	－			±1.5	±2.0	±2.5
500<d≤1800	－	－			±1.0	±1.5	±2.0