Leaded Gunmetal Bronze Hollow Round Bar LG2 Imperial

• LG2 Bronze is one of the most used grades of bronze in the industry.
• Has medium strength, excellent machining properties, and is suitable for bearings, gears, and other components used in relatively light-duty applications.
• Although LG2 is often referred to as phosphor bronze, it is in fact leaded gunmetal. Only the “PB group of bronzes (PB1, PB2, etc) can truly be called phosphor bronze.
• PB1 Bronze Bar is also available. Contact AIMS for assistance.
• Manufactured using finely controlled continuous or centrifugal casting techniques to ensure that hardness and strength are superior to sand-casting methods.
• This also means that the material has a fine grain structure and is free from porosity.
• Available in various sizes.

Key

• Air Actuators
• Architecture
• Couplings
• Electrical Hardware
• Faucets, Fixtures & Pipe fittings
• Furnaces
• Heating Equipment
• Impellers
• Marine Parts
• Medium load Bearings
• Printing Presses
• Pump Parts
• Small Gears
• Transducer Housings
• Valve Bodies and Valves

Chemical Composition

Element Symbol Range % Nominal % Tin Sn 4.0-6.0 4.4 Lead Pb 4.0-6.0 5.5 Zinc Zn 4.0-6.0 5.5 Nickel Ni 1.0 maximum   Iron Fe 0.30 maximum   Aluminium Al 0.005 maximum   Antimony Sb 0.25 maximum   Copper Cu Balance  

Physical Properties

Material Unit Gunmetal LG2 Tensile Strength psi 36000 Yield Strength Min psi 19000 Elongation Min % 15% Hardness Min BHN 60

Machining Allowances

• LG2 Bronze bar has machining allowances added to the sizes quoted.
• To use a 4-1/2 x 2-1/2 hollow bar as an example, this material would measure approximately 4.570 OD x 2.440 ID as supplied (see table below).
• Therefore this allows finished components measuring 4-1/2 OD x 2-1/2 ID to be easily manufactured from 4-1/2 x 2-1/2 hollow bar.

Outside Diameter Inside Diameter Size Range Allowance Size Range Allowance up to 3-3/4 +0.040 up to 3-3/4 -0.060 4 to 5 +0.070 4 to 5 -0.090 5-1/4 to 6 +0.094 5-1/4 to 6 -0.108 6-1/4 to 18 +0.109 6-1/4 to 18 -0.120

Comparative

• Excellent machining properties
• Medium Strength
• Good Pressure Tightness
• Not subject to Dezincification
• Reasonable corrosion resistance to seawater

Common