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C31400 (CDA 314) - LEADED COMMERCIAL BRONZE

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.  http://www.nbm-houston.com/c314.html

 

 

 

C31400 (CDA314) - STANDARDS & PROPERTIES

    

   

Chemical Composition
(%max., unless shown as range or min.)

Cu Fe Pb Ni Zn
Min./Max. 87.5-90.5 .10 1.3-2.5 .7 Rem.
Nominal 89.0 - 1.9 - 9.1

Note: Cu + Sum of Named Elements, 99.6% min.

Applicable Specifications
Product Specification
Bar ASTM B140
Rod ASTM B140
Shapes ASTM B140
Valves MILITARY MIL-V-18436
Common Fabrication Processes
Machining
Fabrication Properties
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 Formed Poor
Machinability Rating 80
Mechanical Properties (measured at room temperature, 68 F (20 C)
Temper Section
Size 		Cold
Work 		Typ/
Min 		Temp Tensile
Strength 		Yield
Strength
(0.5% ext.
under load) 		Yield
Strength
(0.2%
offset) 		Yield
Strength
(0.05%
offset) 		El Rockwell
Hardness 		Vickens
Hard. 		Brinell
Hard. 		Shear
Strength 		Fatigue
Strength* 		Izod
Impact
Strength

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 0 TYP 68 55 50 - - 12 61 - - - - - - 31 - 0.0

6.35

20 379 345 - - 12 61 - - - - - - 214 - 0.0
Rod
H02 0.5 25 TYP 68 55 50 - - 14 61 - - - - - - 31 - 0.0

12.7

20 379 345 - - 14 61 - - - - - - 214 - 0.0
H02 0.25 37 TYP 68 60 55 - - 10 65 - - - - - - 32 - 0.0

6.35

20 414 379 - - 10 65 - - - - - - 221 - 0.0
H04 1 20 TYP 68 52 45 - - 18 58 - - - - - - 30 - 0.0

25.4

20 359 310 - - 18 58 - - - - - - 207 - 0.0
OS050 1 0 TYP 68 37 12 - - 45 - - 55 - - - - 24 - 0.0

25.4

20 255 83 - - 45 - - 55 - - - - 165 - 0.0

*Fatigue Strength: 100 x 10 6cycles,
unless indicated as [N]X 106.

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 @ 20 C
Specific Gravity 8.83 8.83
Electrical Resistivity 24.7 ohms-cmil/ft @ 68 F 4.11 microhm-cm @ 20 C
Electrical Conductivity 42 %IACS @ 68 F 0.246 MegaSiemens/cm @ 20 C
Thermal Conductivity 104.0 Btu · ft/(hr · ft2·oF)at 68F 180.0 W/m · oK at 20 C
Coefficient of Thermal Expansion 10.2 ·10-6 per oF (68-572 F) 18.4 ·10-6 per oC (20-300 C)
Specific Heat Capacity 0.09 Btu/lb/oF at 68 F 377.1 J/kg · oK at 293 K
Modulas of Elasticity in Tension 17000 ksi 117000 MPa
Modulus of Rigidity 6400 ksi 44130 MPa

Tempers Most Commonly Used
Flat Products
BAR, DRAWN H02, H04, O60, OS050

Other
 
 
ROD H02, H04, O60, OS050
SHAPES M30

http://www.nbm-houston.com/c314_specs.html