Silicon Red Brass Rods (UNS C69400) - Mechanical Properties

Silicon red brass UNS C69400 has a copper content of not less than 73%.

The following table shows the mechanical properties of UNS C69400 rods as a function of heat treatment and thickness.

Temper Thickness Tensile Str. Yield Str. Elong. Rockwell
B C F 30T
H00 19mm (0.75in) 689MPa (100ksi) 393MPa (57ksi) 21% 95 - - -
O60 12.7mm (0.5in) 621MPa (90ksi) 310MPa (45ksi) 20% 85 - - -
  25.4mm (1in) 586MPa (85ksi) 296MPa (43ksi) 25% 85 - - -
  51mm (2in) 552MPa (80ksi) 276MPa (40ksi) 25% 85 - - -

An equivalent material to UNS C69400 copper alloy is ASTM B371.

The chemical composition of UNS C69400 copper alloy is outlined in the following table.

Element Content (%)
Copper, Cu 80-83
Silicon, Si 3.5-4.5
Lead, Pb 0.3
Iron, Fe 0.2
Zinc, Zn Balance

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