Cast Lead Bronze Bar Pipe

Cast lead bronze is a type of cast copper alloy with added elements such as tin (Sn) and lead (Pb), typically classified as leaded tin bronze. This type of material possesses excellent wear resistance, corrosion resistance, and machinability, and is widely used in industrial components such as bearings, bushings, valves, and pump bodies. 

1. Common Grades & Standards

III. Chemical Composition (Typical – C83600 "85-5-5-5")

Other grades:

• C93700: Cu 77-81%, Sn 9-11%, Pb 9-11%

• C93800: Cu 74-78%, Sn 7-9%, Pb 14-16%

Role of alloying elements:

• Tin (Sn): Increases strength and corrosion resistance.

• Lead (Pb): Improves machinability, anti-seizing properties, and pressure tightness.

IV. Physical & Mechanical Properties

V. Product Forms – Bar & Pipe

1. Cast Lead Bronze Bar

• Shapes: Round, square, hexagon

• Size range: Solid bar diameters typically from 1/2 inch (12.7mm) up to 10 inches (254mm)

• Supply forms: Continuous cast, centrifugally cast

2. Cast Lead Bronze Pipe / Hollow Bar

• Shapes: Hollow tubes (often called hollow bar)

• Size range: Common from 7/8" OD × 1/2" ID up to 12" OD × 10" ID

• Continuous cast hollow bar: Min ID ~15mm, OD up to 300mm

• Centrifugally cast pipe: OD up to 30 inches (762mm) or larger

VI. Key Performance Advantages

VII. Typical Applications by Industry

VIII. Processing & Surface Finishing

• Casting processes: Suitable for continuous casting, centrifugal casting, sand casting, permanent mold casting

• Machining: Excellent for turning, milling, drilling, tapping

• Surface finishing: Polishing, sandblasting, chemical blackening (antique finish), electroplating, clear lacquer coating

• Welding: Excellent for brazing; arc welding is not recommended

IX. Grade Selection Guide