Tantalum Welding Wire
1.Diameter: minimum 0.05mm
2.Standard: ASTM B365 UNS R05252 Ta-2.5W UNS R05255 Ta-10W
tantalum welding wire
1.Material: RO5200, RO5400, RO5252(Ta-2.5W), RO5255(Ta-10W)
2.Available size: 0.25~3mm
3.Standard: As per ASTM B365-98
4.Purity: >=99.95% or 99.99%
1.Chemical composition:
Chemistry % |
Designation | Chief component | Impurities maxmium |
Ta | Nb | Fe | Si | Ni | W | Mo | Ti | Nb | O | C | H | N |
Ta1 | Remainder | | 0.004 | 0.003 | 0.002 | 0.004 | 0.004 | 0.002 | 0.03 | 0.015 | 0.004 | 0.0015 | 0.002 |
Ta2 | Remainder | | 0.01 | 0.01 | 0.005 | 0.02 | 0.02 | 0.005 | 0.08 | 0.02 | 0.01 | 0.0015 | 0.01 |
2. 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) |
3. Mechanical requirements (annealed condition)
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) | 40000 (276) | 10 |
0.015(0.381)~0.0249(0.633) | 40000 (276) | 15 |
0.025(0.635)~0.124(3.14) | 40000 (276) | 20 |
Note: 10" (254mm) gage length to 0.050"(1.27mm) diameter and 1" (25.4mm) or 2"(50.8mm) gage length over 0.050"(1.27mm) diameter
Special requirements to be agreed on by the supplier and buyer of negotiation
tantalum welding wire
