Phosphor Bronze Hollow Solid Bar PB1 Imperial

• PB1 Phosphor Bronze is a high-strength material that is often referred to as ‘gear bronze’.
• Components that are machined from PB1 are particularly durable in applications where high working loads and speeds are encountered, provided that there is good alignment and adequate lubrication.
• PB1 has good machining properties and good corrosion resistance to seawater and brine, making it suitable for pump and valve components.
• Manufactured using finely controlled continuous or centrifugal casting techniques to ensure that hardness and strength are superior to sand-casting methods.
• Material has a fine grain structure and is free from porosity.

Chemical Composition

Element Symbol Range % Nominal % Tin Sn 10.0-11.0 10.5 Lead Pb 0.25 maximum   Zinc Zn 0.05 maximum   Nickel Ni 0.10 maximum   Iron Fe 0.10 maximum   Aluminium Al 0.01 maximum   Phosphorus P 0.50-1.0 0.7 Copper Cu Balance  

Physical Properties

Material Unit Phosphor Bronze PB1 Tensile Strength Min psi 40000 Yield Strength Min psi 25000 Elongation Min % 0.1 Hardness Min BHN 102

Machining Allowances

• PB1 Bronze bar has machining allowances added to the sizes quoted.

Outside Diameter Size Range Allowance up to 3-3/4" +0.040" 4" to 5" +0.070" 5-1/4" to 6" +0.094" 6-1/4" to 20" +0.109"

Comparative Specifications

• BS1400-PB1; AS1565 90710; SAE 65; JIS H5113 – PBC2C; DIN 1705 – G-CuSn10; ISO 1338 – CuSn10P; BS EN 19 82:1999 – CuSn11P

Common Applications

• Bearings
• Gear Boxes
• Gears
• Pump Components
• Valve Bodies
• Worm Gears
• Worm Wheels

Key Features

• Handles high working loads
• Good for high working speeds
• Suitable for pump and valve components
• Good corrosion resistance to seawater and brine
• Suitable for heavy-duty gears and worm wheels