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Material  :  tantalum 2.5% tungsten refractory alloys (Ta2.5W) or (KBI-6)
TaW2.5 alloy, Tantal 2,5 % Wolfram,  Tantal 2.5 Wolfram,  Tantal 2.5%  Wolfram.
Temper condition: annealed
Specs : according to ASTM B708 -98 R05252.
Chemical composition : 
            O         0.0150 %max
            C         0.0100 %max
            N         0.0100 %max
            H         0.0015 %max
            Fe       0.0100%max
            Ni        0.0100%max
            Si        0.0050 %max
            Ti        0.0100 %max
            Mo       0.0200 %max
            W        2.0-3.5 % 
            Nb       0.5000 %max
            Ta       Remainder 
Physical & Mechanical property : 
For TaW2.5 sheet + TaW2.5% strip When thickness <0.125 inch :
            Tensile strength  276 MPa min.
            Yield strength     207 MPa min.
            Elongation          20%min
For TaW2.5 plate + TaW2.5% plate When thickness ≥0.125 inch :
            Tensile strength  276 MPa min.
            Yield strength     152 MPa min.
            Elongation          25%min 
Size available :
TaW2.5 sheet + TaW2.5% strip
Thickness .0040" up to .0158" x Width up to 24" x Length up to 40"   or
Thickness 0.10 up to 0.40mm x Width up to 609.60mm max x Length up to 2000mm max.

Thickness .0158" up to .060" x Width up to 40" x Length up to 80"   or
Thickness 0.40 up to 1.524mm x Width up to 1000mm max x Length up to 2000mm max.

TaW2.5 plate + TaW2.5% plate
Thickness .060" up to .50" x Width up to 40" x Length up to 80"   or
Thickness 1.525 up to 12.70mm x Width up to 1000mm max x Length up to 2000mm max.

Typical size:
Thickness 1.0mm x160mm x780mm (weight 2.211 kg/pc)
Thickness 0.4mm x 305mm x 455mm
Thickness 0.05mm X 56mm X 108mm
Thickness 0.05mm X 76mm X 500mm
Thickness 0.05mm X 76mm X 500mm
Thickness 0.05mm x width 150mm x 500mm;
Thickness 0.05mm x width 300mm x length 600mm;
Thickness 0.1mm(+/-0.01) x width 60mm (+/-0.5) x 330mm (+/-0.5);
Thickness 0.2mm(+/-0.01) x width 60mm (+/-0.5) x 330mm (+/-0.5);
Thickness 0.1mm(+/-0.01) x width 50mm (+/-0.5) x 330mm (+/-0.5);
Thickness 0.2mm(+/-0.01) x width 50mm (+/-0.5) x 330mm (+/-0.5);

Thickness .005"-.009" x Width up to 4"  x Random length;
Thickness .001"-.010" x Width up to 12" x Random length;
Thickness .010"-.020" x Width up to 24" x Random length;
Thickness .025"-.500" x Width up to 24" x Random length;
Thickness .500"-4.00" x Width up to 26" x Random length;

Trade name : tantalum plate,tantalum sheet, tantalum foil,  tantalum strip, tantalum band, tantalum ribbon, tantalum plates, tantalum sheets, tantalum foils, tantalum strips, tantalum bands, tantalum ribbons, tantalum alloy plate, tantalum alloy sheet, tantalum alloy foil, tantalum alloy strip, tantalum alloy band, tantalum alloy ribbon, tantalum alloy plates, tantalum alloy sheets, tantalum alloy foils, tantalum alloy strips, tantalum alloy bands, tantalum alloy ribbons, tantalum film, tantalum thin film, tantalum gasket, tantalum gaskets, tantalum clad, tantalum cladding, tantalum liner, tantalum shield, tantalum layer, tantalum layers, Tantal 2,5 Wolfram, Tantal 2,5 % Wolfram, Tantalum-Tungsten sheet, TaW2.5, TaW2.5 sheet, Ta-97/W-2.5 %wt , Ta-97.5/W-2.5  %wt , Ta-W, Ta 2.5% W sheet,  97.5 Ta 2.5 W alloy sheet, tantalum 2,5 Tungsten sheet, etc.,

Standard Specification ASTM B 708 -05 for Tantalum Ribbon, Tantalum Alloy Ribbon, Tantalum Strip, Tantalum Alloy Strip, Tantalum Foil, Tantalum Alloy Foil, Tantalum Sheet, Tantalum Alloy Sheet, Tantalum Plate, Tantalum Alloy Plate.

This specification covers unalloyed and alloyed Tantalum Ribbon, Tantalum Alloy Ribbon, Tantalum Strip, Tantalum Alloy Strip, Tantalum Foil, Tantalum Alloy Foil, Tantalum Sheet, Tantalum Alloy Sheet, Tantalum Plate, Tantalum Alloy Plate as follows:
1. ASTM B 708 -05 UNS R05200, unalloyed tantalum, electron-beam furnace or vacuum-arc melt, or both.
2. ASTM B 708 -05 UNS R05400, unalloyed tantalum, powder-metallurgy consolidation.
3. ASTM B 708 -05 UNS R05255, tantalum alloy, 90% tantalum 10% tungsten, electron-beam furnace or vacuum-arc melt, or both.
4. ASTM B 708 -05 UNS R05252, tantalum alloy, 97.5% tantalum 2.5% tungsten, electron-beam furnace or vacuum-arc melt, or both.
5. ASTM B 708 -05 UNS R05240, tantalum alloy, 60% tantalum 40% columbium, electron-beam furnace or vacuum-arc melt.