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PRODUCT DATA of CDA 353
MaterialCDA 353
Product TypeMetal Alloy
Chemical Composition40% Zn, 2% Pb, Rem. Cu
Name of ManufacturerH. Rollet & Co. Ltd.
EXPERIENCE IN PRACTICE
Development StatusCommercial Product
Cost RangeVery Low
Equivalent DesignationsC35300; CuZn37Pb2; CW606N; CZ119, CuZn40Pb2, CZ120; CDA353; Brass (a-b) Leaded
Space ExperienceGood
PHYSICAL PROPERTIES
Specific Gravity8.4
ELASTIC PROPERTIES
Tensile Modulus103 GPa
ELECTRICAL PROPERTIES
Electrical Volume Resistivity6.63e-8 ohm.m
THERMAL PROPERTIES
Thermal Conductivity117 W/m.K
Thermal Expansion Coefficient20.9 µstrain/°C
Melting Range885 to 910 °C
Specific Heat0.377 J/g.K
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
Atmospheric CorrosionThe resistance to atmospheric corrosion is fair. The material is generally plated for protection.
Stress Corrosion StatusLow Resistance to SCC: Table 3
Remark: Not for primary structural items
Remark: in the 50% cold rolled condition only
Remark: acc. to ECSS-Q-ST-70-36C
Data Quality: Design Data
SPECIAL RECOMMENDATIONS
Special RecommendationsWhen this material is used for PCB terminals (machined), there must be a Copper or Nickel diffusion barrier (3microns) between the solder coating and the brass,(See: ECSS-Q-70-08). For swaged terminals, the lead-free variety should be used. · Resistance to stress corrosion is low when the material is 50% cold rolled. Furthermore, it should not be used in stressed conditions. See ECSS-Q-70-36 for alternative copper alloys with high resistance to stress corrosion.