C31600 Leaded Commercial Bronze Bar ASTM B140

C31600 Leaded Commercial Bronze

CDA316 – UNS.C31600 Nickel Leaded Commercial Bronze is also a free machining brass with a higher electrical and thermal conductivity than that of standard free machining brass,Very likely C31400, C31600 Nickel Leaded Commercial Bronze is not only comprise about 89% copper, 8% zinc, and 2% lead, but also contains 1% nickel. This alloy combines the natural corrosion resistance and machinability of C31400 with a higher tensile and yield strength thanks to the controlled addition of nickel. The relatively low zinc content provides excellent corrosion resistance in potable water along with a pleasing golden color that matches C22000 hardware. It also possesses a particular resistance to stress corrosion cracking, so it is an alloy suitable for outdoor use where higher strength is required in comparison with the C31400.

Chemical Composition:

Cu: 87.50-90.50%

Pb: 1.30-2.50%

Ni: 0.70-1.20% Max.

P:  0.04-0.10%

Fe: 0.10% Max.

Zn: Balance

Note: Copper plus additions equal 99.60% minimum.

Typical Physical Properties:

Specific Gravity: 8.86 g/cm3

Coefficient of Thermal Expansion per °C: 18.40 x 10-6 /K (20-300°C)

Electrical Conductivity (% IACS): 32.0% IACS @ 68 F

Thermal Conductivity (W/mk): 140.2 W/m ∙ ˚K at 20 C 

Modulus of Elasticity: 17000 ksi

Note: 

1). the units are based upon US Customary.

2). the typical physical properties apply to age hardened products.

International Specification: