CZ137

Equivalent Specification

Symbol UNS EN BS JIS IS
CuZn40Pb - - CZ137 - -

DESCRIPTION

CZ137, Engraving brass, are 60/40 alpha-beta brasses with lead added to give free machining properties. They should not be used for acid etched work, for which the single phase alpha brasses should be used.

CHEMICAL COMPOSITION

Elements Min (%) Max (%)
Cu 58.5 61
Pb 0.3 0.8
Fe - 0.2
Total Others - 0.5
Zn Remainder

Mechanical Properties According To BS2874 (As Per Temper M)

Range (mm) From To UTS Min (N/mm²) PS Min Elongation Min (%) Hardness Min Hardness Max
Round (Dia) 6 40 380 - 25 - -
40 75 350 - 28 - -
Hex (A/F) 6 40 380 - 25 - -
40 75 350 - 28 - -
Square (A/F) 6 40 380 - 25 - -
40 75 350 - 28 - -
PHYSICAL PROPERTIES
Melting Point - Liquidus °F 1650
Melting Point - Solidus °F 1630
Density lb/cu in. at 68°F 0.304
Specific Gravity 8.41
Electrical Conductivity %IACS at 68°F 27
Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F 69
Coefficient of Thermal Expansion 68-572 10-6 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 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 Excellent
Machinability Rating 70

TYPICAL USES

  • Automatic Screw Machine Parts
  • Blanking
  • Riveting
  • Brazing
  • Upsetting