ANSONIA COPPER & BRASS, INC.

 

 

 

COPPER ALLOY DATA SHEET

 

C31400

 

Leaded Commercial Bronze C31400 combines the natural corrosion resistance of C22000 with the machinability typical of leaded brasses.  Like C22000, it is an alpha brass nominally composed of 89% copper and 9% zinc, but it also contains approximately 2% lead to impart free-cutting characteristics.  The relatively low zinc content of C31400 provides excellent corrosion resistance in potable water along with a pleasing golden color that matches C22000 hardware.  Alloy C31400 is also suitable for outdoor use due to its resistance to stress corrosion cracking and to corrosion in general, but where the highest strength is not required.

 

Hot and Cold Working:  C31400 has poor hot workability due to its lead content, so hot working is not recommended; however, it can be successfully hot extruded into rod products.  Although it is primarily used for high-speed screw machining, it has good cold workability, sustaining a moderate degree of cold work.

 

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

 

Applications:  Screws, screw machine parts, pickling crates, architectural hardware.

 

Applicable Specifications:  When so specified, C31400 will be manufactured to the latest revision of the following specification:  ASTM B140.

 

Standard Forms Available:  Rod, wire and shapes.  Normally, this alloy is supplied in half hard temper in rod and extruded shapes for screw machine products; however, special tempers can be designed for applications requiring added ductility to permit cold work (in addition to machining).

 

 

 

ADS No. C31400

Rev. No. 3

Rev. Date 10/20/00

C31400

 

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 C31400  

 

 

Nominal Composition:                        89% Copper

                                                                9.1% Zinc

                                                                1.9% Lead

 

Physical Properties:

 

            Melting Point (Liquidus):                                            1040°C (1900°F)

                                   (Solidus):                                              1010°C (1850°F)

            Density at 68°F:                                                         0.319 Lbs./In.3

            Coefficient of Linear Thermal Expansion per °F:     1.02 x 10-5 (68-572°F)

            Electrical Conductivity at 68°F (volumetric):           42% IACS (in the annealed condition; lower in hard temper)

            Thermal Conductivity Btu/ft.2/ft./hr./°F at 68°F:       104

            Modulus of Elasticity - Tension:                                 17,000 ksi

            Modulus of Regidity:                                                   6,400 ksi

 

Fabrication Properties:

 

            Annealing Temperature:                        425-650°C (800-1200°F)

            Approximate Relative Machinability:    80 (free cutting brass arbitrarily rated at 100)

 

Mechanical Properties: 

 

 

Tensile Strength

(psi)

Yield Strength

(0.5% EUL) (psi)

% Elongation

(in 2")

Rockwell Hardness

0.250" Dia. Rod

 

 

 

 

1/2 Hard (37%)

60,000

55,000

10

HRB 65

 

 

 

 

 

0.500" Dia. Rod

 

 

 

 

1/2 Hard (25%)

55,000

50,000

14

HRB 61

 

 

 

 

 

1.0" Dia. Rod

 

 

 

 

Annealed 0.050 mm

37,000

12,000

45

HRF 55

1/2 Hard (20%)

52,000

45,000

18

HRB 58

 

 

 

ADS No. C31400

Rev. No. 3

Rev. Date 10/20/00

C31400

 

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.