CZ108

DESCRIPTION

CZ108 yellow brass has a copper content of not less than 62%, CuZn37 is the major brass alloy for the cold forming process. Even though brasses with lower zinc content have better cold forming properties, CuZn37 is the most used alloy. Reasons for this are on the one hand economical due to lower price of zinc compared to copper on the other hand the forming properties of this alloy meet the demand of many applications.

CHEMICAL COMPOSITION

Elements Min (%) Max (%)
Cu 62.00 65.00
Pb - 0.30
Total Others - 0.60
Zn Remainder

MECHANICAL PROPERTIES ACCORDING TO BS2873 (AS PER TEMPER 1/2H)

Range From To UTS Min (MPa) UTS Max (MPa) PS Min (MPa) Elongation Min (%) Hardness Min Hardness Max
Round (Dia) 1.5 75 460 620 - - - -
Hex (A/F) 3 70 460 620 - - - -
Square (A/F) 3 60 460 620 - - - -
Rectangle (Thickness) 3 50 460 620 - - - -
PHYSICAL PROPERTIES
Melting Point - Liquidus°F 1680
Density lb/cu in. at 68°F 0.305
Specific Gravity 8.44
Electrical Conductivity % IACS at 68°F 27.6
Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F 67
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) 11.4
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 Excellent
Capacity for Being Hot Formed Fair
Machinability Rating 35

TYPICAL USES

  • Fasteners
  • Industrial