CZ124

DESCRIPTION

CZ124 Free machining brass, produced from a combination of copper and zinc, has the highest machinability of all copper alloys, and is the standard against which all the others are compared to. CZ124 Brass, known for its strength and resistance to corrosion with properties closely resembling that of steel, is one of the most popular copper alloys used today. CZ124 Brass can be precision machined easily. Although ductile in its softened state, CZ124 Brass is a strong material to work with and maintains its strength even under some of the most demanding conditions. CZ124 Brass forms a thin protective “patina”, which, unlike steel and iron, will not rust when exposed to the atmosphere. As a high-density material, CZ124 Brass is ideal for heavy industrial parts. CZ124 Brass is also valued for its high polished finish. CZ124 Brass is available in Rounds, Flats, Squares, Hexagons, Shapes and Hollows.

CHEMICAL COMPOSITION

Elements Min (%) Max (%)
Cu 60.00 63.00
Pb 2.50 3.70
Fe - 0.30
Total Others Excl Fe - 0.50
Zn Remainder

Mechanical Properties according To BS2874 (As Per Temper M )

Range From To UTS Min (N/mm²) PS Min (N/mm²) Elongation Min (%) Hardness Min Hardness Max
Round (Dia) 1.5 25 330 130 12 - -
25 50 300 115 18 - -
50 75 280 95 22 - -
Hex (A/F) 3 25 330 130 12 - -
25 50 300 115 18 - -
50 70 280 95 22 - -
Square (A/F) 3 12 300 115 18 - -
12 25 310 105 12 - -
50 75 280 95 22 - -
Rectangle (Thickness) 3 25 300 115 18 - -
25 50 280 95 22 - -
PHYSICAL PROPERTIES
Melting Point - Liquidus°F 1650
Melting Point - Solidus°F 1630
Densitylb/cu in. at 68°F 0.307
Specific Gravity 8.5
Electrical Conductivity% IACS at 68°F 26
Thermal ConductivityBtu/ 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 CapacityBtu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tensionksi 14000
Modulus of Rigidityksi 5300
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 Fair
Capacity for Being Hot Formed Fair
Machinability Rating 100

TYPICAL USES

  • Automotive
  • Builders Hardware
  • Consumer
  • Fasteners
  • Industrial
  • Plumbing