ANSONIA COPPER & BRASS, INC.

COPPER ALLOY DATA SHEET

C48500

Leaded Naval Brass C48500 is nominally composed of 60% copper, 37.5% zinc, 1.8% lead, and 0.7% tin. As is typical of brass alloys with the duplex alpha + beta structure, C48500 has good strength and rigidity. By substituting tin for an equal quantity of zinc, a high corrosion resistance to seawater is achieved. The addition of tin also gives the alloy an inherent resistance to dezincification, thereby further inhibiting the impingement by seawater at higher than normal temperatures. The addition of lead improves machinability, so C48500 is used in machining applications where unleaded Naval Brass C46400 might be the choice. The alloy is also noted for its machinability and resistance to wear, fatigue, galling, and stress corrosion cracking.

Hot Working: C48500 has good hot workability. Characteristically it becomes extremely plastic when hot and is fairly well adapted to any hot working process including hot forging and pressing and hot heading and upsetting.

Cold Working: Due to its lead content, C48500 has poor cold workability. Because it can be cold worked only to a very limited degree, it is used for machining applications rather than typical cold working operations such as blanking, drawing, forming, bending, shearing, heading and upsetting.

Joining: Joining by soldering is excellent, while good by brazing. The lead content prevents successful welding.

Applications: C48500 is typically used for fasteners, valve stems, screw machine products, and marine hardware.

Applicable Specifications: When so specified, C48500 will be manufactured to the following current specifications: ASTM Specifications B21 and B124.

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

ADS No. C48500

Rev. No. 1

Rev. Date 10/30/00

C48500

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 C48500

Nominal Composition: 60% Copper

37.5% Zinc

1.8% Lead

0.7% Tin

Physical Properties:

Melting Point (Liquidus): 900°C (1650°F)

(Solidus): 885°C (1630°F)

Density at 68°F: 0.305 Lbs./In.³

Coefficient of Linear Thermal Expansion per °F: 1.18 x 10^-5 (68-572°F)

Electrical Conductivity at 68°F (volumetric): 26% IACS (in the annealed condition; lower in hard temper)

Thermal Conductivity Btu/ft.²/ft./hr./°F at 68°F: 67

Modulus of Elasticity - Tension: 15,000 ksi

Modulus of Rigidity: 5,600 ksi

Fabrication Properties:

Hot Working Temperature: 650-750°C (1200-1400°F)

Annealing Temperature: 425-600°C (800-1100°F)

Approximate Relative Machinability: 70 (Free cutting brass arbitrarily rated at 100.)

Mechanical Properties:
Temper	Tensile Strength (psi)	Yield Strength (0.5% EUL) (psi)	% Elongation (in 2")	Rockwell Hardness Range
1.0" Dia. Rod
O60	57,000	25,000	40	HRB 55
H01	69,000	46,000	20	HRB 78
H02	75,000	53,000	15	HRB 82

ADS No. C48500

Rev. No. 1

Rev. Date 10/30/00

C48500

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.