ANSONIA COPPER & BRASS, INC.

 

 

 

 

COPPER ALLOY DATA SHEET

 

ACB 6733

 

Nominally composed of 61.75% copper, 33.8% zinc, .7% lead, 1.0% silicon, and 2.75% manganese, leaded silicon manganese bronze ACB 6733 is a high strength, machinable engineering alloy which has good corrosion resistance.  ACB 6733 is a low leaded version of C67300 alloy with an adjusted chemistry to favor some cold working while maintaining excellent machinability.  It is an alloy also noted to be resistant to galling, fatigue, stress corrosion cracking, and wear.  The copper zinc matrix contains needle-like manganese silicide particles which are very hard and impart the high wear resistance to the alloy.

 

Hot Working:  Because it is an alpha beta alloy, ACB 6733 has good hot workability and can be hot forged.

 

Cold Working:  ACB 6733 has fair cold workability due to its lower lead content.

 

Joining:  The lead content prevents successful welding.  Suitability for soldering is excellent, and for brazing, good.

 

Applications:  Typical applications of ACB 6733 include heavy duty components such as bearings and bushings, connecting rods, fasteners, gears and cams.

 

Applicable Specifications:  SAE J463

 

Standard Forms Available:  Rod, bar and extruded shapes in Temper H50, extruded/drawn.  For other forms and tempers, please consult Ansonia Copper & Brass, Inc.

 

 

 

ADS No. 6733

Rev. No. 3

Rev. Date 8/17/99

6733

 

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 ACB 6733

 

 

Nominal Composition:                     61.75% Copper

                                                               33.8% Zinc

                                                                0.7% Lead

                                                               1.0% Silicon

                                                          2.75% Manganese

 

Physical Properties:

 

            Melting Point (Liquidus):                                            870°C (1600°F)

            Density at 68°F:                                                         0.299 Lbs./In.3

            Coefficient of Linear Thermal Expansion per °F:     11 x 10-6 (75-570°F)

            Electrical Conductivity at 68°F (volumetric):           21% IACS

            Thermal Conductivity Btu/ft.2/ft./hr./°F at 68°F:       55

            Modulus of Elasticity - Tension:                                 17,950 ksi

 

Fabrication Properties:

 

            Approximate Relative Machinability:    65 (Free cutting brass arbitrarily rated at 100.)

 

Mechanical Properties:  (minimum)

 

Extruded and Drawn Temper, Rod H50

 

Size

(Inch)

Tensile Strength

(psi)

Yield Strength

(0.5% Ext.) (psi)

% Elongation

(in 2")

Rockwell Hardness Range

 

 

 

 

 

.500" to 1.000"

65,000

40,000

11

80-95

1.000" to 1.500"

60,000

38,000

12

80-95

1.501" to 3.000"

55,000

35,000

14

80-95

 

 

 

 

 

 

 

 

ADS No. 6733

Rev. No. 3

Rev. Date 8/17/99

6733

 

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.