ANSONIA COPPER & BRASS, INC.

COPPER ALLOY DATA SHEET

C18700

ACB Leaded Copper C18700 has a nominal composition of 99.0% copper and 1.0% lead. The alloying element lead imparts free-cutting properties to the copper. Although the addition of lead slightly lowers the electrical conductivity below that of electrolytic tough pitch (ETP) C11000 copper, Leaded Copper C18700 still possesses high electrical conductivity well within the limits imposed by most current-carrying requirements.

Hot Working: This alloy is not recommended for hot working due to its lead content.

Cold Working: ACB Leaded Copper C18700 has a good capacity for being cold worked. It cold heads exceptionally well either in a single operation or where secondary operations are required. Free cutting rods of this alloy are normally produced in hard drawn condition; however, if such cold work as bending, flaring, heading or beading is required in addition to machining, the temper of the alloy can be modified.

Joining: This alloy is readily joined by brazing and soldering, but the lead content prevents successful welding. Strong reducing atmospheres such as hydrogen are not recommended because low levels of oxygen in this alloy may make it susceptible to hydrogen embrittlement.

Applications: The various and unusual properties of ACB Leaded Copper C18700 have found numerous applications for the manufacture of parts machined from rods and for current carrying studs, nuts and bolts designed for use at ambient temperatures. The alloy is also frequently used as the preferred metal for bolts with drilled shanks and for parts subjected to fine machining, as well as for connectors and motor parts. However, it must be noted that in spite of this alloy's many superior qualities, it should not be used for hot forging.

Applicable Specifications: When so specified, ACB Leaded Copper C18700 will be manufactured to the latest revision of ASTM B301.

Standard Forms Available: Rod, bar, wire and shapes. For other forms, please consult Ansonia Copper & Brass, Inc.

ADS No. C18700

Rev. No. 5

Rev. Date 7/1/99

C18700

P. O. Box 109 - Ansonia, Connecticut 06401	725 Bank St. – Waterbury, Connecticut 06708
Tel.: 1-800-521-1703 FAX 203-735-3787	Tel.: 1-800-243-3204 FAX 203-756-1330

PROPERTIES OF C18700

Nominal Composition: 99.0% Copper

1.0% Lead

Physical Properties:

Melting Point (Liquidus): 1080°C (1976°F)

(Solidus): 953°C (1747°F)

Density at 68°F: 0.323 Lbs./In.³

Average Coefficient of Linear Thermal

Expansion per °F: 9.8 x 10^-6 (68-572°F)

Electrical Conductivity at 68°F (volumetric): 96% IACS (in annealed condition; lower for hard temper)

Thermal Conductivity Btu/ft.²/ft./hr./°F at 68°F: 218

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: 425-650°C (800-1200°F)

Approximate Relative Machinability: 85 (free cutting brass arbitrarily rated at 100)

Mechanical Properties:
Rod Size Temper	Tensile Strength (psi)	Yield Strength (0.5% EUL) (psi)	% Elongation (in 2")	Rockwell Hardness
0.125" Dia. – H04 Hard (50%)	55,000	50,000	8	--
0.250" Dia. – H02 Half Hard (20%)	43,000	40,000	18	HRB 43
0.250" Dia. – H04 Hard (45%)	53,000	49,000	10	HRB 54
0.500" Dia. – H04 Hard (35%)	48,000	44,000	12	HRB 48
1.0" Dia. – OS050 0.050 mm	32,000	10,000	45	HRF 40
1.0" Dia. – H02 Half Hard (20%)	42,000	38,000	25	HRB 42
1.0" Dia. – H04 Hard (35%)	48,000	42,000	15	HRB 48

ADS No. C18700

Rev. No. 5

Rev. Date 7/1/99

C18700

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.