C2800

C2800 is a lead-free material that is still well-suited for machining due to its structural composition. It can be employed as a cost-effective substitute for traditional lead-containing machining brass, especially in situations where there are no strict demands for mechanical properties and corrosion resistance.

CHEMICAL COMPOSITION
Elements Min (%) Max (%)
Cu 59.00 63.00
Pb 0.09
Fe 0.07
Zn Remainder
(1) Cu + Sum of Named Elements 99.7% min.
MECHANICAL PROPERTIES ACCORDING TO JIS 2800 (AS PER TEMPER BD)
Range (mm) From To UTS Min (Mpa) PS Min Elongation Min (%) Hardness Min Hardness Max
Round (Dia) 1.5 75 375 10
Hex (A/F) 3 70 375 10
Square (A/F) 3 60 375 10
Rectangle (Thickness) 3 50 375 10
PHYSICAL PROPERTIES
Melting Point – Liquidus°F 1660
Melting Point – Solidus°F 1650
Density lb/cu in. at 68°F 0.303
Specific Gravity 8.39
Electrical Conductivity % IACS at 68°F 28
Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F 71
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) 11.6
Specific Heat Capacity Btu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tension ksi 15000
Modulus of Rigidity ksi 5600
FABRICATION PROPERTIES 
Technique   Suitability
Soldering Excellent
Brazing Excellent
Oxyacetylene Welding Good
Gas Shielded Arc Welding Fair
Coated Metal Arc Welding Not Recommended
Spot Weld Good
Seam Weld Not Recommended
Butt Weld Good
Capacity for Being Cold Worked Fair
Capacity for Being Hot Formed Excellent
Forgeability Rating 90
Machinability Rating 40

C2800

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