Manufacturer of Custom Machined Parts

Cast C31400

C31400, or leaded commercial bronze, is a free machining brass with excellent electrical and thermal conductivity. Alloy C314 is resistant to corrosion and contains approximately 2% lead to impart free-cutting characteristics.

Information

PRODUCT DESCRIPTION: Leaded Commercial Bronze
TEMPERS: H02 Half Hard, H04 Hard
SOLIDS: 3/8” to 2” O.D.
HEX: 3/8" to 2" O.D.
RECTANGLES: Consult Mill
STANDARD LENGTHS: 144”

Typical Uses

BUILDERS HARDWARE: door knobs
ELECTRICAL: connectors for wire and cable, electrical plug-type connectors
FASTENERS: nuts, screws
INDUSTRIAL: pickling crates, pickling fixtures, pickling racks, screw machine parts

Similar or Equivalent Specification

CDAASTMSAEAMSFederalMilitaryOther
C31400B140 B140MMIL-V-18436

Chemical Composition

Cu%Pb%Zn%Fe%Ni%
87.50-90.501.30-2.50Rem.0.100.70

Chemical Composition according to ASTM B140/B140M-12(2017)

Note: Cu + Sum of Named Elements, 99.5% min. Single values represent maximums.

Machinability

Copper Alloy UNS No.Machinability RatingDensity (lb / in³ at 68 °F)
C31400800.319

Mechanical Properties

Mechanical Properties according to ASTM B140/B140M-12(2017), H02 Half Hard

Size Range: 1/2" Diameter and Under

Tensile Strength, minYield Strength, at 0.5% Extension Under Load, minElongation, in 2 in. or 50 mm min Rockwell "B" HardnessRemarks
ksiMPaksiMPa%typical HRB
5034530205761

Size Range: Over 1/2" Diameter to 1" Inclusive

Tensile Strength, minYield Strength, at 0.5% Extension Under Load, minElongation, in 2 in. or 50 mm min Rockwell "B" HardnessRemarks
ksiMPaksiMPa%typical HRB
5034530205761

Size Range: Over 1" Diameter

Tensile Strength, minYield Strength, at 0.5% Extension Under Load, minElongation, in 2 in. or 50 mm min Rockwell "B" HardnessRemarks
ksiMPaksiMPa%typical HRB
40275251701258

H04 Hard
Size Range: 2" Diameter and Under

Tensile Strength, minYield Strength, at 0.5% Extension Under Load, minElongation, in 2 in. or 50 mm min Rockwell "B" HardnessRemarks
ksiMPaksiMPa%typical HRB
5336540275665

Physical Properties

 US CustomaryMetric
Melting Point - Liquidus1900 °F 1038 °C
Melting Point - Solidus1850 °F 1010 °C
Density0.319 lb/in³ at 68 °F 8.83 gm/cm³ at 20 °C
Specific Gravity8.838.83
Electrical Conductivity42% IACS at 68 °F 0.246 MegaSiemens/cm at 20 °C
Thermal Conductivity104 Btu/sq ft/ft hr/°F at 68 °F 180 W/m at 20 °C
Coefficient of Thermal Expansion 68-57210.6 · 10-6 per °F (68-572 °F)17.6 · 10-6 per °C (20-300 °C)
Specific Heat Capacity0.09 Btu/lb/°F at 68 °F377.1 J/kg at 20 °C
Modulus of Elastic in Tension17000 ksi117212 MPa
Modulus of Rigidity6400 ksi44127 MPa

Fabrication Properties

TechniqueSuitability
SolderingExcellent
BrazingGood
Oxyacetylene WeldingNot Recommended
Gas Shielded Arc WeldingNot Recommended
Coated Metal Arc WeldingNot Recommended
Spot WeldNot Recommended
Seam WeldNot Recommended
Butt WeldFair
Capacity for Being Cold WorkedGood
Capacity for Being Hot FormedPoor
Machinability Rating80

Thermal Properties

TreatmentMinimum *Maximum *
Annealing8001200

* Temperature is measured in Fahrenheit

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