Dr. Dmitri Kopeliovich

According to the Unified Numbering System (UNS):

Red Brasses and Leaded Red Brasses are copper alloys, containing 2-15% of zinc (Zn) as the major alloying element and up to 5% of tin (Sn) and up to 8% of lead (Pb) as additional alloying elements. Cast Red Brasses and cast Leaded Red Brasses (Ounce Metal, Valve Metal, Plumbing Goods Brass) are designated with the numbers from C83300 through C83999.

Cast Yellow brasses are copper alloys, containing 23-41% of zinc (Zn) as the major alloying element. Yellow brasses may contain up to 3% of lead (Pb) and up to 1.5% of tin (Sn) as additional alloying elements. Cast Yellow Brasses are designated with the numbers from C85000 through C85999.

Brasses containing up to 35% of zinc have mono-phase structure (α-phase).

These alloys are very ductile.

Brasses containing more than 35% of zinc have binary phase structure (mixture of α- phase and β-phase).

These alloys are less ductile.

Machinability of the Cast Brasses (particularly alloyed with lead) is very good.

Cast Brasses are used in architectural and decorative applications, for manufacturing heating and cooling equipment, electrical equipment, parts of valves, pump impellers, pipe fittings, small gears, door an window hardware, gas line fittings.

(Materials Data)

• Cast copper alloy C83600 (Ounce Metal)
• Cast copper alloy C84400 (Valve Metal)
• Cast copper alloy C84800 (Plumbing Goods Brass)
• Cast copper alloy C85200 (Leaded Yellow Brass)
• Cast copper alloy C85400 (No.1 Yellow Brass)
• Cast copper alloy C85500 (Yellow Brass)

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• Cast Coppers and high copper alloys
• Cast manganese bronzes
• Cast silicon bronzes and silicon brasses
• Cast tin bronzes and leaded tin bronzes
• Cast aluminum bronzes
• Cast copper-nickel alloys and Nickel Silvers
• Spinodal Bronzes
• Cast copper-lead alloys
• Cast copper special alloys
• Wrought brasses
• Classification of copper alloys
• Temper designation of copper alloys
• Treatment of molten copper alloys

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