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C31400 Leaded Commercial Bronze (CDA 314)
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C31400 Leaded Commercial Bronze (CDA 314)

CDA 314, ASTM B140

Leaded Commercial Bronze C31400 combines the natural corrosion resistance of C22000 with the machinability typical of leaded brasses. Like C22000, it is an alpha brass nominally composed of 89% copper and 9% zinc, but it also contains approximately 2% lead to impart free-cutting characteristics. The relatively low zinc content of C31400 provides excellent corrosion resistance in potable water along with a pleasing golden color that matches C22000 hardware. Alloy C31400 is also suitable for outdoor use due to its resistance to stress corrosion cracking and to corrosion in general, but where the highest strength is not required.

Typical Uses for C31400 Leaded Commercial Bronze:

BUILDERS HARDWARE: Door Knobs

ELECTRICAL: Connectors for Wire and Cable, Electrical Plug Type Connectors

FASTENERS: Screws, Nuts

INDUSTRIAL: Pickling Fixtures, Pickling Racks, Pickling Crates, Screw Machine Parts

Sizes Available From NBM

SOLID BAR . . . . . . . . . . 3/16" - 3 1/2" diameter

HEX BAR . . . . . . . . . . . . 3/8" - 2" across the flats

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Chemical Composition
Temper
Mechanical Properties
Physical Properties
Fabrication
Specifications
Cu Fe Pb Ni Zn
Min/Max 87.5 - 90.5 0.1 1.3 - 2.5 0.7 Rem
Nominals 89.0000 - 1.9000 - 9.1000
Product Type Temper Type
Bar ASTM B140
Rod ASTM B140
Shapes ASTM B140
Valves MILITARY MIL-V-18436
Temper Sect. Size Cold Work Type Min Temp Tensile Strength YS
0.05% UL 		YS
0.02% Offset 		YS
0.005% Offset 		Elong. RH
B 		RH
C 		RH
F 		RH
30T 		VH
500 		BH
500 		BH
3000 		Shear
Strgth 		Fatigue
Strgth 		Izod
Impact
Strgth
- in. % - F ksi ksi ksi ksi % B C F 30T 500 500 3000 ksi ksi ft-lb
- mm. - - C MPa MPa MPa MPa - - - - - - - - MPa MPa J
BAR
H02 0.25 68 55 50 - - - - - - - - - - 31 -
H02 6.35 0 TYP 20 379 345 - - 12 61 - - - - - - 214 - 0
ROD
OS050 1 68 37 12 - - - - - - - - - - 24 -
OS050 25.4 0 TYP 20 255 83 - - 45 - - 55 - - - - 165 - 0
H04 1 68 52 45 - - - - - - - - - - 30 -
H04 25.4 20 TYP 20 359 310 - - 18 58 - - - - - - 207 - 0
H02 0.25 68 60 55 - - - - - - - - - - 32 -
H02 6.35 37 TYP 20 414 379 - - 10 65 - - - - - - 221 - 0
H02 0.5 68 55 50 - - - - - - - - - - 31 -
H02 12.7 25 TYP 20 379 345 - - 14 61 - - - - - - 214 - 0
Product Property US Customary Metric
Coefficient of Thermal Expansion 10.2 . 10-6 per oF (68-572 F) 18.4 . 10 6? per å¡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/å¡F @ 68 F 377.1 J/kg . å¡K at 293 K
Thermal Conductivity 104.0 Btu . ft/(hr . ft2 . å¡F) @ 68 F 180.0 W/m . å¡K at 20 C
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
End Product Specification
Bar ASTM B140
Rod ASTM B140
Shapes ASTM B140
Valves MILITARY MIL-V-18436

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