C14500 Tellurium Copper Bar
C14500, or tellurium copper, has similar mechanical properties to unalloyed, pure copper but with a higher machinability. The cutting properties of C14500 are enhanced significantly by creating a copper alloy with the addition of tellurium. Tellurium copper is also known for its high electrical conductivity characteristic.
Description
C14500
Product description: Tellurium copper
Tempers: H02 half hard, H04 hard
Solids: 3/8" to 2 3/4" O.D.*
Standard lengths: 144"
*Consult mill for other sizes
Typical uses
Architecture: Fire protection
Electrical: Electrical connectors, motor parts, soldering copper, switch parts, transistor bases
Industrial: Forgings, furnace brazed articles, screw machine products, soldering tips, welding torch tips
Plumbing: Fixtures, plumbing fittings, sprinkler heads
Similar or equivalent specification
| CDA | ASTM | SAE | AMS | Federal | Military | Other |
| C14500 | B124 | J461 |
|
|
| Tellurium-bearing (PTE) |
Chemical composition
| Cu%1,2 | P% | Te% |
| 99.90 min | 0.004-0.012 | 0.40-0.70 |
Chemical composition according to ASTM B301/B301M-13(2020)
1Includes silver 2Includes tellurium and phosphorus
Note: includes oxygen-free or deoxidized grades with deoxidizers (such as phosphorus, boron, lithium, or other) in an amount agreed upon. Unless otherwise noted, single values represent maximums.
Machinability
| Copper alloy UNS no. | Machinability rating | Density (lb/in3 at 68 °F) |
| C14500 | 85 | 0.323 |
Mechanical properties
C14500
H02 half hard
Size range: 1/16" diameter rod to 1/4" inclusive
| Tensile strength, min | Yield strength, at 0.5% extension under load, min | Elongation, 4x diameter or specimen thickness, min | Brinell hardness (500 kg load) | Remarks | ||
| Ksi | MPa | Ksi | MPa | % | typical BHN |
|
| 38 | 260 | 30 | 205 | 8 | 76 | |
Size range: over 1/4" diameter rod to 2 5/8" inclusive
| Tensile strength, min | Yield strength, at 0.5% extension under load, min | Elongation, 4x diameter or specimen thickness, min | Brinell hardness (500 kg load) | Remarks | ||
| Ksi | MPa | Ksi | MPa | % | typical BHN |
|
| 38 | 260 | 30 | 205 | 12 | 76 |
|
C14500
H04 hard
Size range: 1/16" diameter rod (round only) to 1/4" inclusive
| Tensile strength, min | Yield strength, at 0.5% extension under load, min | Elongation, 4x diameter or specimen thickness, min | Brinell hardness (500 kg load) | Remarks | ||
| Ksi | MPa | Ksi | MPa | % | typical BHN |
|
| 48 | 330 | 40 | 275 | 4 | 81 |
|
Size range: over 1/4" diameter rod (round only) to 1 1/4" inclusive
| Tensile strength, min | Yield strength, at 0.5% extension under load, min | Elongation, 4x diameter or specimen thickness, min | Brinell hardness (500 kg load) | Remarks | ||
| Ksi | MPa | Ksi | MPa | % | typical BHN |
|
| 44 | 305 | 38 | 260 | 8 | 81 |
|
Size range: over 1 1/4" diameter rod (round only) to 3" inclusive
| Tensile strength, min | Yield strength, at 0.5% extension under load, min | Elongation, 4x diameter or specimen thickness, min | Brinell hardness (500 kg load) | Remarks | ||
| Ksi | MPa | Ksi | MPa | % | typical BHN |
|
| 40 | 275 | 35 | 240 | 8 | 81 |
|
Physical properties
|
| US Customary | Metric |
| Melting point - liquidus | 1976 °F | 1080 °C |
| Melting point - solidus | 1924 °F | 1051 °C |
| Density | 0.323 lb/in3 at 68 °F | 8.94 gm/cm3 at 20 °C |
| Specific gravity | 8.94 | 8.94 |
| Electrical conductivity | 93% IACS at 68 °F | 0.539 MegaSiemens/cm at 20 °C |
| Thermal conductivity | 205 Btu/sq ft/ft hr/°F at 68 °F | 355 W/m at 20 °C |
| Coefficient of thermal expansion 68-212 | 9.5 · 10-6 per °F (68-212 °F) | 16.5 · 10-6 per °C (20-100 °C) |
| Coefficient of thermal expansion 68-392 | 9.7 · 10-6 per °F (68-392 °F) | 16.8 · 10-6 per °C (20-200 °C) |
| Coefficient of thermal expansion 68-572 | 9.9 · 10-6 per °F (68-572 °F) | 17.1 · 10-6 per °C (20-300 °C) |
| Specific heat capacity | 0.092 Btu/lb/°F at 68 °F | 385.5 J/kg at 20 °C |
| Modulus of elasticity in tension | 17000 ksi | 117212 MPa |
| Modulus of rigidity | 6400 ksi | 44127 MPa |
Physical properties provided by CDA
Fabrication properties
| Technique | Suitability |
| Soldering | Excellent |
| Brazing | Good |
| Oxyacetylene welding | Fair |
| Gas shielded arc welding | Fair |
| Coated metal arc welding | Not recommended |
| Spot weld | Not recommended |
| Seam weld | Not recommended |
| Butt weld | Fair |
| Capacity for being cold worked | Good |
| Capacity for being hot formed | Good |
| Forgeability rating | 65 |
| Machinability rating | 85 |
Fabrication properties provided by CDA
Thermal properties
| Treatment | Minimum* | Maximum* |
| Annealing | 800 | 1200 |
| Hot treatment | 1400 | 1600 |
Common fabrication processes
Cold - drawing, machining, moderate cold heading; Hot - extrusion, forging (closed die only)
Common fabrication processes provided by CDA
