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C31400 Leaded Commerical Bronze available from Dura-Bar Metal Services. #

Leaded Commercial C31400 (C314)

C31400 Leaded Commercial Bronze is a free machining brass with excellent electrical and thermal conductivity. The alloy is resistant to corrosion and contains 2% lead to impart free-cutting characteristics.

Also known as: CDA 314, ASTM B-140 Alloy C31400, Mil V-18436

Chemical Composition
Cu% Pb% Zn% Fe% Ni% P%
87.50-90.50 1.30-2.50 Remainder 0.10 0.70 N/A

Typical Uses

Builders Hardware:
Door Knobs
Electrical:
Electrical Plug Type Connectors, Connectors for Wire and Cable
Fasteners:
Nuts, Screws
Industrial:
Pickling Crates, Pickling Fixtures, Pickling Racks, Screw Machine Parts

Alloy Properties

H02 Half Hard Temper: 1/2" Dia. and Under
Tensile Strength, min 50 ksi 345 MPa
Yield Strength @ .5% ext under load min 30 ksi 205 MPa
Elongation in 2 in. or 50 mm min, % 7  
Brinell Hardness, min N/A  
Machinability Rating 80%  
H02 Half Hard Temper: Over 1/2" Dia. to 1" Incl.
Tensile Strength, min 45 ksi 310 MPa
Yield Strength @ .5% ext under load min 27 ksi 185 MPa
Elongation in 2 in. or 50 mm min, % 10  
Brinell Hardness, min N/A  
Machinability Rating 80%  
H02 Half Hard Temper: Over 1" Dia.
Tensile Strength, min 40 ksi 275 MPa
Yield Strength @ .5% ext under load min 25 ksi 170 MPa
Elongation in 2 in. or 50 mm min, % 12  
Brinell Hardness, min N/A  
Machinability Rating 80%  
H04 Hard Temper: 2" Dia. and Under
Tensile Strength, min 53 ksi 365 MPa
Yield Strength @ .5% ext under load min 40 ksi 275 MPa
Elongation in 2 in. or 50 mm min, % 6  
Brinell Hardness, min N/A  
Machinability Rating 80%  
  US Customary Metric
Melting Point-Liquidus 1900 F 1038 C
Melting Point-Solidus 1850 F 1010 C
Density 0.319 lb/in3
@ 68 F
8.83 gm/cm3
@ 20 C
Specific Gravity 8.83 8.83
Electrical Resistivity 24.70 ohms-cmil/ft
@ 68 F
4.11 microhm-cm
@ 20 C
Electrical Conductivity 420 %IACS @ 68 F 0.246 MegaSiemens/
cm @ 20 C
Thermal Conductivity 104 Btu ft/
(hr ft2 oF) @ 68 F
180.0 W/m oK @ 20 C
Coefficient of
Thermal Expansion
10.20 10-6 per oF
(68-572 F)
18.4 10-6 per oC
(20-300 C)
Specific Heat Capacity 0.090 Btu/ib/oF
@ 68 F
377.1 J/Kg oK
@ 293 K
Modulus of Elasticity
in Tension
17000 ksi 117000 Mpa
Modulus of Rigidity 6400 ksi 44130 Mpa
Joining Technique Suitability
Soldering Excellent
Brazing Good
Oxyacetylene Welding Not Recommended
Gas Shielded Arc Welding Not Recommended
Coated Metal Arc Welding Not Recommended
Spot Weld Not Recommended
Seam Weld Not Recommended
Butt Weld Fair
Capacity for being Cold Worked Good
Capacity for being Hot Worked Poor