ANSONIA COPPER & BRASS, INC.

 

 

COPPER ALLOY DATA SHEET

 

C34000, ACB 3440 and C34500

 

Basically related to the yellow brass family, brasses C34000 and C34500 and ACB brass 3440 differ only from this family in that have lead added to them to impact machinability.  Machinability increases with increasing lead content.  C34000, ACB 3440 and C34500 have similar copper-zinc ratios, but have different nominal lead contents of 1.00%, 0.75% and 2.00%, respectively, in response to the demand for having leaded brasses with varying machinability.  The alloys are also favored for their good corrosion resistance, cold workability and solderability.

 

The microstructure of these alloys is primarily alpha, thus being virtually free of beta.  Because the beta phase in brass reduces ductility and corrosion resistance, these alloys exhibit improved ductility where bending, heading, upsetting, thread rolling, crimping and staking operations are performed compared to C36000 free cutting brass.  The tendency for corrosion due to dezincification of the beta phase is also reduced when compared to C36000.

 

Hot Working:  Hot workability is poor and decreases with increasing lead content.  C34000, ACB 3440, and C34500 thus have poor to fair hot workability due to their lead content.  Although their capacity for hot working is limited, a modest amount is possible if the alloys are mechanically supported during the process.

 

Cold Working:  C34000, ACB 3440 and C34500 have good cold workability.  They are well suited for manufacturing processes which require a combination of good cold working properties with good machinability.  Although not readily ductile, even in the annealed condition, the alloys can be bent, formed, cold headed and roll threaded.  In general, leaded brasses are not intended for extensive cold working, but rather fill a need to have brasses with good cutting qualities combined with moderate cold workability available.

 

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

 

Applications:  Applications of C34000, ACB 3440 and C34500 include hardware such as gears, connectors, nut, rivets, screws, plumbing fittings and tire valve stems.

 

Applicable Specifications:  When so specified, C34000 and C34500 will be manufactured to the latest revision of ASTM B453 for rod.

 

Standard Forms Available: Rod, bar, and wire.  A soft or lightly drawn temper will permit heading, swaging, bending and forming to a considerable degree.

 

ADS Nos. C34000, 3440, C34500

Rev. No. 4

Rev. Date 10/20/00

C34000 3440 C34500

 

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 C34000, ACB 3440 and

C34500

 

Nominal Composition:

C34000

ACB 3440

C34500

 

63.50% Copper

64.0% Copper

63.50% Copper

 

35.50% Zinc

35.25% Zinc

34.50% Zinc

 

1.00% Lead

0.75% Lead

2.00% Lead

 

Physical Properties:

 

            Melting Point (Liquidus):                                         925°C (1700°F)

                                    (Solidus):                                          885°C (1630°F)

            Density at 68°F:                                                      0.306 Lbs./In.3

            Coefficient of Linear Expansion per °F:                 1.13 x 10-5 (68-572°F)

            Electrical Conductivity at 68°F (volumetric):        26% IACS (in 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:

 

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

            Approximate Relative Machinability:    70 (C34000)

                                                                           65 (ACB 3440)

                                                                           80 (C34500)

                                                                           (Free cutting brass arbitrarily rated at 100.)

 

Mechanical Properties:

 

 

 

 

Tensile Strength

Yield Strength

% Elongation

Rockwell

0.080" Dia. Wire

(psi)

(0.5% EUL (psi)

(in 2")

Hardness

OS 025

50,000

--

60

--

H00

58,000

--

45

--

H02

88,000

--

15

--

1.0" Dia. Rod

 

 

 

 

OS 025

50,000

19,000

60

HRF 70

H01

55,000

42,000

40

HRB 60

 

 

 

 

 

ADS Nos. C34000, 3440, C34500

Rev. No. 4

Rev. Date 10/20/00

C34000 3440 C34500

 

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.