Manufacturer of custom machined parts, specializing in bronze and other alloys for your engineered applications
419.223.1075
1046 Greenlawn Ave, Lima OH 45804
NOW HIRING
COPPER-BASED ALLOYS
C31400
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
CDA
ASTM
SAE
AMS
Federal
Military
Other
C31400
B140 B140M
MIL-V-18436
CHEMICAL COMPOSITION
Cu%
Pb%
Zn%
Fe%
Ni%
87.50-90.50
1.30-2.50
Rem.
0.10
0.70
MACHINABILITY
Copper Alloy UNS No.
Machinability Rating
Density(lb / in 3 at 68 °F)
C31400
80
0.319
MECHANICAL PROPERTIES
Mechanical Properties according to ASTM B140/B140M-12(2017), H02 Half Hard

SIZE RANGE: 1/2" DIAMETER AND UNDER
Tensile Strength, min
Yield Strength, at 0.5% Extension Under Load, min
Elongation, in 2 in. or 50 mm min
Rockwell "B" Hardness
Remarks
ksi
MPa
ksi
MPa
%
typical HRB
50
345
30
205
7
61

SIZE RANGE: OVER 1/2" DIAMETER TO 1" INCLUSIVE
Tensile Strength, min
Yield Strength, at 0.5% Extension Under Load, min
Elongation, in 2 in. or 50 mm min
Rockwell "B" Hardness
Remarks
ksi
MPa
ksi
MPa
%
typical HRB
50
345
30
205
7
61

SIZE RANGE: OVER 1" DIAMETER
Tensile Strength, min
Yield Strength, at 0.5% Extension Under Load, min
Elongation, in 2 in. or 50 mm min
Rockwell "B" Hardness
Remarks
ksi
MPa
ksi
MPa
%
typical HRB
40
275
25
170
12
58


H04 Hard
SIZE RANGE: 2" DIAMETER AND UNDER
Tensile Strength, min
Yield Strength, at 0.5% Extension Under Load, min
Elongation, in 2 in. or 50 mm min
Rockwell "B" Hardness
Remarks
ksi
MPa
ksi
MPa
%
typical HRB
53
365
40
275
6
65
PHYSICAL PROPERTIES
US Customary
Metric
Melting Point - Liquidus
1900 °F
1038 °C
Melting Point - Solidus
1850 °F
1010 °C
Density
0.319 lb/in3 at 68 °F
8.83 gm/cm3 at 20 °C
Specific Gravity
8.83
8.83
Electrical Conductivity
42% IACS at 68 °F
0.246 MegaSiemens/cm at 20 °C
Thermal Conductivity
104 Btu/sq ft/ft hr/°F at 68 °F
180 W/m at 20 °C
Coefficient of Thermal Expansion 68-572

10.6 · 10-6 per °F (68-572 °F)

17.6 · 10-6 per °C (20-300 °C)

Specific Heat Capacity
0.09 Btu/lb/°F at 68 °F
377.1 J/kg at 20 °C
Modulus of Elastic in Tension
17000 ksi
117212 MPa
Modulus of Rigidity
6400 ksi
44127 MPa
FABRICATION PROPERTIES
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 Formed
Poor
Machinability Rating
80
THERMAL PROPERTIES
Treatment
Minimum*
Maximum*
Annealing
800
1200


SPEC SHEET


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