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Product Code : C31400
Product Description
C31400 Leaded Commercial Bronze

Spec Equivalents: ASTM B140

The C31400 Leaded Commercial Bronze is the combination of natural corrosion resistance with the machining ability of leaded brass. It is the combination of 89% copper and 9% zinc and also contains 2% lead that provides free-cutting characteristics. The low zinc content provides corrosion resistance in potable water with a golden color. The alloy is suitable for outdoor use owing to its resistance towards stress corrosion cracking and where the highest strength is not required.

ELECTRICAL : Connectors for Wire and Cable, Electrical Plug Type Connectors
FASTENERS : Screws, Nuts
INDUSTRIAL : Pickling Fixtures, Pickling Racks, Pickling Crates, Screw Machine Parts

End Product Specification
Bar ASTM B140
Rod ASTM B140
Shapes ASTM B140
Valves MILITARY MIL-V-18436

Chemical Composition:
  Cu Fe Pb Ni Zn
Min/Max 87.5 - 90.5 0.1 1.3 - 2.5 0.7 Rem
Nominals 89 - 1.9 - 9.1

Joining Technique Suitability
Brazing Good
Butt Weld Fair
Capacity for Being Cold Worked Good
Capacity for Being Hot Formed Poor
Coated Metal Arc Welding Not Recommended
Gas Sheilded Arc Welding Not Recommended
Machinability rating 80
Oxyacetylene Welding Not Recommended
Seam Weld Not Recommended
Soldering Excellent
Spot Weld Not Recommended

Physical Properties:
Product Property US Customary Metric
Coefficient of Thermal Expansion 10.2 ·10-6 per oF (68-572 F) 18.4 · 10 6? per °C (20-300 C)
Density 0.319 lb/in3 @ 68 F 8.83 gm/cm3 @ 20 C
Electrical Conductivity 42 %IACS @ 68 F 0.246 MegaSiemens/cm @ 20 C
Electrical Resistivity 24.7 ohms-cmil/ft @ 68 F 4.11 microhm-cm @ 20 C
Melting Point Liquid US 1900 F 1038 C
Melting Point Solid US 1850 F 1010 C
Modulas of Elasticity in Tension 17000 ksi 117000 MPa
Modulas of Rigidity 6400 ksi 44130 MPa
Specific Gravity 8.83 8.83
Specific Heat Capacity 0.09 Btu/lb/°F @ 68 F 377.1 J/kg · °K at 293 K
Thermal Conductivity 104.0 Btu · ft/(hr · ft2 ·°F) @ 68 F 180.0 W/m · °K at 20 C

Sizes Available:
HOLLOW RODS Min Bore Size 20 mm and Max OD 100 mm
ROUND RODS 6mm To 130 mm
HEX 5mm To 60mm
SQUARE 4mm To 60mm
FLAT 5mm Min Thickness and max Width 120mm
PROFILES / SECTIONS AS per Customer Drawing
BILLETS Up to 200 mm
INGOTS AS per Specification

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