Brief introduction:

What is tantalum

? Tantalum is one of metal elements. Tantalum is mainly in tantalite and it is always together with niobium. Recently, demand for tantalum keep weak stability and tantalum price remains stable.

Tantalum wire

is made from tantalum powder by rolling and drawing processing methods. Tantalum is a filamentous tantalum material.

Material:           RO5200，RO5400，RO5252(Ta-2.5W)，RO5255(Ta-10W)
Available size:￠0.25~￠4mm
Standard:         As per ASTM B 365-98

Properties of tantalum wire:
Tantalum is very hard, Tantalum can be drawn into wire or thin foil. The thermal expansion coefficient of tantalum is small. Tantalum has excellent chemical properties, such as high corrosion resistance. Whether in the cold and hot conditions, hydrochloric acid, concentrated nitric acid or in "aqua regia", tantalum has no chemical reaction. Tantalum wire has the same properties of tantalum.

Applications of tantalum wire:
Tantalum can be used for manufacturing the evaporating dish and also can be used for electrolytic capacitor, electrode, rectifier. In medicine, tantalum is used to make flakes or sewing thread to mend the destructive tissue.
Tantalum wire is widely used in electronic industry. Tantalum wire is mainly used as anodic lead wire of tantalum electrolytic capacitor.

Special requirements of tantalum wire will to be agreed on by the supplier and buyer of negotiations.

Chemical composition:

chemistry%
designation	chief component		impurities maximum
	Ta	Nb	Fe	Si	Ni	W	Mo	Ti	Nb	O	C	H	N
Ta1	Remainder	---	0.004	0.003	0.002	0.004	0.006	0.002	0.03	0.01	0.004	0.0015	0.002
Ta2	Remainder	--	0.01	0.01	0.005	0.02	0.02	0.005	0.08	0.015	0.01	0.0015	0.01
TaNb3	Remainder	<3.5	0.01	0.01	0.005	0.02	0.02	0.005	--	0.015	0.01	0.0015	0.01
TaNb20	Remainder	17.0-23.0	0.01	0.01	0.005	0.02	0.02	0.005	--	0.015	0.01	0.0015	0.01
Ta2.5W	Remainder	--	0.005	0.003	0.002	3.0	0.006	0.002	0.04	0.015	0.005	0.0015	0.006
Ta10W	Remainder	--	0.005	0.003	0.002	11	0.006	0.002	0.04	0.015	0.005	0.0015	0.006
special require of tantalum wire to be agreed on by the supplier and buyer of negotiations.

 
Permissible variations in diameter for rods and wires

Diameter， inch (mm)	Tolerance， +/-inch (mm)
0.010~0.020 excl (0.254~0.508)	0.0005 (0.013)
0.020~0.030 excl (0.508~0.762)	0.00075 (0.019)
0.030~0.060 excl (0.762~1.524)	0.001 (0.025)
0.060~0.090 excl (1.524~2.286)	0.0015 (　0.038)
0.090~0.125 excl (2.286~3.175)	0.002 (0.051)
0.125~0.187 excl (3.175~4.750)	0.003 (0.076)
0.187~0.375 excl (4.750~9.525)	0.004 (0.102)
0.375~0.500 excl (9.525~12.70)	0.005 (0.127)
0.500~0.625 excl (12.70~15.88)	0.007 (0.178)
0.625~0.750 excl (15.88~19.05)	0.008 (0.203)
0.750~1.000 excl (19.05~25.40)	0.010　(0.254)
1.000~1.500 excl (25.40~38.10)	0.015 (0.381)
1.500~2.000 excl (38.10~50.80)	0.020 (0.508)
2.000~2.500 excl (50.80~63.50)	0.030 (0.762)

 
Mechanical requirements (annealed condition)

Rod， Diameter 0.125" (3.18mm)~2.5" (63.5mm)
Grade	Tensile strength， psi (MPa)， ≥	Yield strength， psi (MPa)， ≥	Elongation in　1 inch gage length， ％， ≥
RO5200/RO5400	25000 (172)	15000 (103)	25
RO5252	40000 (276)	28000 (193)	20
RO5255	70000 (482)	55000 (379)	20
RO5240	35000 (244)	15000(103)	25
Wire， Diameter， inch (mm)
Grade	Diameter，inch (mm)	tensile strength，psi (MPa)，≥	Elongation， ％， ≥
RO5200/RO5400	0.010(0.254)~0.0149(0.379)	35000 (241)	10
	0.015(0.381)~0.0249(0.633)	35000 (241)	15
	0.025(0.635)~0.124(3.14)	30000 (207)	20
RO5252	0.010(0.254)~0.0149(0.379)	40000 (276)	5
	0.015(0.381)~0.0249(0.633)	40000 (276)	10
	0.025(0.635)~0.124(3.14)	40000 (276)	15
RO5255	0.010(0.254)~0.0149(0.379)	70000 (482)	5
	0.015(0.381)~0.0249(0.633)	70000 (482)	10
	0.025(0.635)~0.124(3.14)	70000 (482)	15
RO5240	0.010(0.254)~0.0149(0.379)	35000 (244)	10
	0.015(0.381)~0.0249(0.633)	35000 (244)	15
	0.025(0.635)~0.124(3.14)	35000 (244)	20