C31600

Nickel Bearing C31600 is composed of approximately 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 resulting from the controlled addition of nickel. The relatively low zinc content provides excellent corrosion resistance in potable water along with a pleasing golden colour It also possesses a particular resistance to stress corrosion cracking. It is an alloy suitable for outdoor use where higher strength is required.

CHEMICAL COMPOSITION
Elements Min (%) Max (%)
Cu 87.50 90.50
Pb 1.30 2.50
Fe 0.10
Ni 0.70 1.20
P 0.04 0.10
Total Others 0.40
Zn Remainder
MECHANICAL PROPERTIES ACCORDING TO C31600 ASTMB140 (AS PER TEMPER HO2)
Range (Inch) From To UTS Min (ksi) PS Min (ksi) Elongation Min (%) Hardness Min Hardness Max
Round (Dia) 0.059 0.500 50 30 7
0.500 1.000 45 27 10
1.000 2.953 40 25 12
Hex (A/F) 0.118 0.5.00 50 30 7
0.500 1.000 45 27 10
1.000 2.756 40 25 12
Square (A/F) 0.118 2.362 40 25 12
Rectangle Thickness 0.118 1.000 40 25 12
Width 0.118 2.000
Thickness 1.000 1.968 40 25 12
Width 2.000 2.756
Range (mm) From To UTS Min (MPa) PS Min (MPa) Elongation Min (%) Hardness Min Hardness Max
Round (Dia) 1.5 12 345 205 7
12 25 310 185 10
25 75 275 170 12
Hex (A/F) 3 12 345 205 7
12 25 310 185 10
25 70 275 170 12
Square (A/F) 3 12 275 170 12
50 60 275 170 12
Rectangle Thickness 3 25 275 170 12
Width 4 50
Thickness 25 50 275 170 12
Width 50 70
PHYSICAL PROPERTIES
Melting Point – Liquidus°F 1900
Melting Point – Solidus°F 1850
Density lb/cu in. at 68°F 0.32
Specific Gravity 8.86
Electrical Conductivity% IACS at 68°F 32
Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F 81
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) 10.2
Specific Heat Capacity Btu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tension ksi 17000
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

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