COPPER ALLOY
DATA SHEET
C14500
Tellurium Copper C14500 holds the answer to
certain fabrication problems no other alloy has so satisfactorily solved. Its mechanical properties are similar to that
of unalloyed, pure copper, yet its machinability rating of 85% is considerably
higher than 20% for unalloyed coppers.
This alloy thus possesses a unique combination of properties.
As the alloy cools from its liquid phase,
tellurium precipitates out of the intermetallic compound Cu2Te. This precipitate becomes finely dispersed
throughout the matrix and assists in chip breakage during machining. The chips are short and brittle,
easily freeing themselves from the tooling so rapid machining is thus permitted.
The alloy also maintains good corrosion
resistance and an excellent electrical conductivity, allowing it to be used in
those applications requiring these properties.
Hot Working: Its capacity for being hot
worked is good, requiring only moderate power for this operation. It has a hot forgeability rating of 65
(closed die only), with forging brass arbitrarily rated at 100. This quality, in particular, accounts for its
use in forming closed-die hot forged products requiring high conductivity and
good corrosion resistance. In the hard
condition, it is not as readily softened by heat as the leaded coppers, thus
permitting its use at relatively higher temperatures. It can be readily hot worked at temperatures
higher than those tolerated by other free cutting coppers.
Cold Working:
It
also has a good capacity for being cold worked, though it offers slightly less
ductility than pure copper giving moderate cold headability.
Joining and Fabrication: Alloy C14500 is readily joined by brazing and
soldering, but has a fair rating for oxyacetylene and gas shielded arc welding,
as well as resistance butt welding. Spot
and seam resistance welding is not recommended.
Applications:
Because of the exceptional free cutting properties inherent in this metal,
C14500 is well adapted for use in high-speed automatic
screw machines. It cold heads well and
is an outstanding alloy for the production of hot forged products requiring
high conductivity and good corrosion resistance. It has also proved to be an excellent
material for use in operations requiring furnace brazing and annealing in a
reducing atmosphere where high conductivity and free machining must be
maintained. During this operation,
C14500 is not subject to hydrogen embrittlement.
Typical uses of C14500 are transformer and
circuit-breaker terminals, hot forged studs, nuts and bolts, and current-carrying
parts that require fine machine work and drilling. It is also used for welding torch tips, and
marine and domestic hardware.
Applicable Specifications: When so specified, C14500 will be
manufactured to the latest revision of the following specifications: ASTM Specification B301. The other grades of tellurium copper are also
available.
Standard Forms Available: Rod, bar, wire and shapes. For other forms, please contact Ansonia Copper
& Brass, Inc.
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ADS No. 14500 |
Rev. No. 5 |
Rev. Date |
C14500 |
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Tel.: 1-800-521-1703 FAX 203-735-3787 |
Tel.: 1-800-243-3204 FAX 203-756-1330 |
PROPERTIES OF C14500
Nominal Composition: 99.5% Copper
0.55% Tellurium
0.008% Phosphorus
Physical Properties:
Melting Point (Liquidus): 1075°C (1967°F)
(Solidus): 1051°C (1924°F)
Density
at 68°F: 0.323
Lbs./In.3
Coefficient of Linear Expansion per °F: 9.5 x 10-6 (68-212°F)
9.7 x 10-6 (68-329°F)
9.9 x 10-6 (68-572°F)
Electrical Conductivity at 68°F (volumetric): 93% IACS (in the annealed condition; lower for hard temper)
Thermal Conductivity Btu/ft.2/ft./hr./°F at 68°F: 205
Modulus of Elasticity - Tension: 17,000 ksi
Modulus of Rigidity: 6,400 ksi
Fabrication
Properties:
Hot Working Temperature: 750-875°C (1400-1600°F)
Annealing Temperature: 420-650°C (800-1200°F)
Approximate Relative Machinability: 85 (free cutting brass arbitrarily rated at 100)
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Mechanical Properties: |
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Rod |
Tensile Strength (psi) |
Yield Strength (0.5% Ext.) (psi) |
% Elongation (in 2") |
Rockwell Hardness |
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0.250" Dia. – Half Hard (20%) H02 |
43,000 |
40,000 |
18 |
HRB 43 |
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0.250" Dia. – Hard (45%) H04 |
53,000 |
49,000 |
10 |
HRB 54 |
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0.500" Dia. – 0.015 mm OS015 |
33,000 |
11,000 |
46 |
HRF 43 |
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0.500" Dia. – Half Hard (20%) H02 |
43,000 |
40,000 |
20 |
HRB 43 |
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0.500" Dia. – Hard (35%) H04 |
48,000 |
44,000 |
15 |
HRB 48 |
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1.000" Dia. – 0.050 mm OS050 |
32,000 |
10,000 |
46 |
HRF 43 |
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1.000" Dia. – Half Hard (20%) H02 |
42,000 |
40,000 |
25 |
HRB 42 |
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1.000" Dia. – Hard (35%) H04 |
48,000 |
44,000 |
20 |
HRB 48 |
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2.000" Dia. – Half Hard (15%) H02 |
42,000 |
39,000 |
35 |
HRB 42 |
Wire |
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0.080" Dia. – 0.035 mm OS035 |
33,000 |
11,000 |
40 |
-- |
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0.080" Dia. – 1/8 Hard H00 |
38,000 |
30,000 |
20 |
-- |
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0.080" Dia. – 1/2 Hard H02 |
51,000 |
41,000 |
6 |
-- |
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0.080" Dia. – Hard H04 |
56,000 |
51,000 |
3 |
-- |
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ADS No. 14500 |
Rev. No. 5 |
Rev. Date |
C14500 |
The
statements and data provided on this data sheet are to be considered only as a
general guide. Commercial variations in
material properties are expected, so values listed here are not intended to be
used for specifications. Please consult
the appropriate industry specifications where applicable. Ansonia Copper & Brass, Inc. also cannot
assume responsibility for performance of these products in service because we
do not control or supervise subsequent use of our products.