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Type & Application

Type	Application
STW91	For making filament, shock-resistance filament and other high-temperature-resistance devices, ect.
STW71	For making auto lamp filament and other anti-shock devices.
STW61	For making coiled-coil filament, ect.
STW31	For making coiled-coil or trispiral CFL filament, incandescent filament and support, ect.
STW41	For making stranded tungsten wire, tungsten heater element, ect.
STW42	For making stranded tungsten wire, tungsten heater element and other no special temperature required devices, ect.
STW11	For making electrode and lead, ect.

Chemical Composition (%)

W	Fe	Mo	Others
≥99.95	≤0.0020	≤0.0030	≤0.0010

Note: "K" is not regarded as impurity. Product Feature All wires showed here are doped tungsten wires and manufactured by the high tech of doping, acid washing, isostatic pressing, PLC controlled direct-sintering, swaging and auto feeding. The products are featured with minimumde formation at hight emperatures, high recrystalliztion temperatures, uniformity in dimension and excellent coilability. For tungsten rod weighing 3kg/pc, its rough welding tungsten wire weighing 5kg/pc. Customers are allowed to choose various types of tungsten wire in accordance with their specific applications. Diameter Tolerance

Dia. µ	Weight mg/200mm	Tolerance
		Weight			Dia.
		0 level	Ⅰlevel	Ⅱ level	Ⅰlevel	Ⅱ level
10<d≤18	0.3~0.98	----	± 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	> 272.71~371.19	----	± 1.0	± 1.5	----	----
350<d≤500	----	----			± 1.5	± 2.0
500<d≤1800	----	----			± 1.0	± 1.5

Note: The diameter range shall be determined by the customers.

Chemical analysis report of one of our W doped wire

Customer	---
Commodity	Tungsten Wire
Date	May, 14, 1999
Brand	---
Lot No.	X735
Application	---
Specification	Ø 0.63mm ×3 ± 2%
Quantity	2.70 Kg
Appearance	OK
Greed Testing for Ø 1.25mm	---
Sag Value for Ø 0.4mm	---
Tensile Strength	---
elongation	---
Other	---

Mo	K	Other Elements (ppm max)
		Al	As	Bi	Ca	Cd	Co	Cr	Cu	Fe	Mg	Mn
≥ 99.95%	65ppm	12	10	1	10	1	5	1	1	13	5	5
		Mo	Na	Ni	P	Pb	S	Sb	Si	Sn	Ti	V
		20	3	5	5	1	5	2	10	1	5	5

Standard Tungsten Wire

Specification		Type			Tolerance mg or %
Dia.(mm)	Weight Mg/200m	Black	Cleaned	CLR. not anneal
0.0150	0.68	nsv	-	-	0.66-0.70
0.0195	1.15	asv	-	-	1.12-1.18
0.0240	1.74	ndg	-	-	1.70-1.78
0.0315	3.01	ndg	-	-	2.94-3.08
0.0335	3.40	nsg	-	-	3.32-3.49
0.0350	3.71	-	asv	-	3.62-3.80
0.0365	4.04	ndg	-	-	3.94-4.14
0.0420	5.34	-	asv	-	5.23-5.45
0.0460	6.41	-	asg	-	6.28-6.54
0.0447	6.05	ndg	-	-	5.93-6.17
0.0575	10.02	ndg	-	-	9.82-10.22
0.0655	13.05	-	adg	-	12.79-13.31
0.0690	14.43	-	adg	-	14.14-14.72
0.1030	32.40	-	asg	-	31.80-33.00
0.1620	9.52	-	asge	-	78.33-80.71
0.1730	89.65	-	ashe	-	88.80-90.50
0.1860	106.10	-	ashe	-	104.00-108.20
0,1900	109.39	fd	-	-	107.75-111.03
0.1970	117.20	-	ashe	-	114.90-119.50
0.0550	4.08	-	-	-	+/- 1.5%
0.059	5.68	-	-	-	+/- 1.5%
0.068	7.55	-	-	-	+/- 1.5%
0.080	10.45	-	-	-	+/- 1.5%
0.083	11.25	-	-	-	+/- 1.5%
0.120	23.51	-	-	-	+/- 1.5%
0.130	27.59	-	-	-	+/- 1.5%
0.220	65.31	-	-	-	+/- 1.5%
0.210	72.01	-	-	-	+/- 1.5%
0.220	79.03	-	-	-	+/- 1.5%
0.260	110.38	-	-	-	+/- 1.5%
0.310	156.91	-	-	-	+/- 1.5%
0.380	231.20	-	-	-	+/- 1.5%