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C69430 Wrought BRONZES Other Copper-Zinc Alloys true false https://api.copper.org/alloys.xhtml/C69430
Chemical Composition
Elements
Cu(1,2) Pb Zn Fe As Si
(1) Cu value includes Ag.
(2) Cu + Sum of Named Elements 99.5% min.
Min (%) 80.0 0.03 3.5
Max (%) 83.0 0.30 Rem 0.20 0.06 4.5
Mechanical Properties *
Form Temper Temper Code Tensile Strength
(ksi)		 YS-0.5% Ext
(ksi)		 Elongation
(%)		 Rockwell B scale Section Size
(in)
* Measured at room temperature, 68°F (20°C).
Rod Hard H04 100 Typ
 57 Typ
 21 Typ
 95 Typ
 0.75
Soft Anneal O60 80 Typ
 40 Typ
 25 Typ
 85 Typ
 2
Soft Anneal O60 85 Typ
 43 Typ
 25 Typ
 85 Typ
 1
Soft Anneal O60 90 Typ
 45 Typ
 20 Typ
 85 Typ
 0.50
Physical Properties
Melting Point - Liquidus°F 1685
Melting Point - Solidus°F 1510
Densitylb/cu in. at 68°F 0.26
Specific Gravity 8.19
Electrical Conductivity% IACS at 68°F 6.2
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F 15
Coefficient of Thermal Expansion 68-57210 to -6 power per °F (68 – 572°F) 11.2
Specific Heat CapacityBtu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tensionksi 16000
Fabrication Properties
Technique Suitability
Soldering Excellent
Brazing Excellent
Oxyacetylene Welding Good
Spot Weld Good
Seam Weld Good
Butt Weld Good
Capacity for Being Cold Worked Good
Capacity for Being Hot Formed Excellent
Forgeability Rating 80
Machinability Rating 30
Common Fabrication Processes
  • Forging
  • Screw Machining
Thermal Properties

No thermal properties for this alloy

Typical uses
Product Category Product Reason Category Reason
Industrial Valve Stems Corrosion Resistance Corrosion Resistance
Valve Stems Corrosion Resistance Dezincification Resistance
Valve Stems Mechanical Properties Moderate Strength
Applicable Specifications
Form Specific Sub-Form Application System Standard Description
Rod ASTM B371/B371M COPPER-ZINC-SILICON ALLOY ROD
Corrosion Properties

No Corrosion Properties Available.