Refractory Alloys Tantalum is stocked by 25 North American distributors and produced by 16 large mills. Distributors will offer small quantity buys while mills will generally only sell large quantities, with delivery times anywhere from 10 to 50 weeks depending on size and form required
This material is stocked primarily in Flat Rolled Products by 17 distributors but is also available to a lesser extent in Bar Products, Tubular Products, Wire Products, Shapes, Casting Products, Piping Components, Powder, and Scientific Forms.
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Specifications
The following specifications cover Refractory Alloys Tantalum
No Specifications.
Property Results
Chemistry Data : [top]
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MSO currently has no data available for this grade.
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Principal Design Features
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Tantalum is a refractory metal, falling between tungsten and molybdenum in terms of melting point (5425 F). It is widely available in EB cast and powder metallurgy mill forms an it applications fall into two major categories: electronic and metallurgical. Excellent additional data available at http://www.rembar.com/tant.htm.
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Applications
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Applications for tantalum fall into two major categories: electronic and metallurgical. The electronics industry is the largest single user, where it is employed in capacitors, filaments and various other high temperature components. The chemical process equipment industry commonly employs tantalum in heat exchangers, heaters, vessels, etc.
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Machinability
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Tantalum has a tendency to gall, very similar to pure copper. This can cause welding of tooling to the workpiece if proper procedures are not followed. Heavy roughing cuts with M2 high speed or C2 carbide tooling is recommended. To minimize galling, high speed tooling with generous lubricant flooding is recommended. Speeds of 40-60 fpm are recommended.
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Forming
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With fully annealed material, spinning, deep drawing, blanking and punching can easily be performed. The material has a relatively low work hardening rate.
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Welding
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Tantalum can be fusion and resistance welded successfully. Resistance welding should be performed under water. Fusion welding is most successful when the material to be joined is absolutely clean.
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Heat Treatment
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Tantalum is not heat treatable.
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Forging
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Forge at 2200 down to 1500 F.
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Annealing
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Recrystalization occurs in tantalum between 2000 and 2500 F. A high vacuum furnace is strongly recommended.
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Hardening
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Tantalum can only he hardened through cold work.
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Physical Data : [top]
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Density (lb / cu. in.)
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0.6
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Poissons Ratio
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0.35
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Mean Coeff Thermal Expansion
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6.6
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Mechanical Data : [top]
Form |
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Plate |
Condition |
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Annealed |
Temper |
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70 |
Tensile Strength |
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30 |
Yield Strength |
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20 |
Elongation |
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20 |
Videos :
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MSO currently has no videos available for this grade.
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Disclaimer
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