C2700

C2700, classified as engraving brass, belongs to the 60/40 alpha-beta brass family with varying levels of lead added to enhance free machining characteristics. These alloys find extensive use in crafting engraved plates, plaques, builders’ hardware, and gears. However, they are not recommended for acid etched work, which calls for the use of single phase alpha brasses.

CHEMICAL COMPOSITION
Elements Min (%) Max (%)
Cu 63.00 68.5
Pb 0.09
Fe 0.07
Zn Remainder
(1) Cu + Sum of Named Elements 99.7% min.
MECHANICAL PROPERTIES ACCORDING TO JIS C3712 (AS PER TEMPER BD)
Range From To UTS Min (Mpa) PS Min Elongation Min (%) Hardness Min Hardness Max
Round (Dia) 1.5 75 355 10
6 50 355 20
Hex (A/F) 3 70 355 10
6 50 355 20
Square (A/F) 3 60 355 10
6 50 355 20
Rectangle (Thickness) 3 50 355 10
6 50 355 20
PHYSICAL PROPERTIES
Melting Point – Liquidus°F 1710
Melting Point – Solidus°F 1660
Densitylb/cu in. at 68°F 0.306
Specific Gravity 8.47
Electrical Conductivity% IACS at 68°F 27
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F 67
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) 11.3
Specific Heat CapacityBtu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tensionksi 15000
Modulus of Rigidityksi 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 Excellent
Capacity for Being Hot Formed Poor
Machinability Rating 30

C2700

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