Leaded Bronze SAE660 / 932

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

Overview:

Leaded Bronze C93200 or SAE 660 is a general purpose leaded tin bronze bearing and bushing material. It has excellent machining properties, good hardness, strength and wear resistance with excellent anti-frictional qualities. The alloy is not subject to dezincification and has reasonable corrosion resistance to sea water and brine making it suitable for pump and valve components. 932 is suitable for bearings having medium loads and speeds with adequate lubrications.

The composition of 932 is strictly controlled as are the casting conditions. All Kormax bronze is manufactured using finely controlled continuous or centrifugal casting techniques to ensure that hardness and strength is superior to sand-casting methods. This also means that the material has a fine grain structure and is free from porosity.

Chemical Composition

ElementSymbolRange (%)Nominal (%)
TinSn6.3 – 7.57.0
LeadPb6.0 – 8.07.0
ZincZn2.0 – 4.03.0
NickelNi1.0 maximum
IronFe0.20 maximum
AluminiumAl0.005 maximum
AntimonySb0.35 maximum
PhosphorusP0.15 maximum
CopperCuBalance

Physical Properties

MaterialUnitLeaded Bronze 932
Tensile Strength MinN/mm2240
Yield Strength MinN/mm2135
Elongation Min%20%
Hardness MinBHN60

Machining Allowances:

All Kormax LG2 Bronze bar has machining allowances added to the sizes quoted. To use 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 DiameterInside Diameter
Size RangeAllowanceSize RangeAllowance
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 Specifications

AS1565 C93200; ASTM B505, B271 – C93200; SAE 660

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Metals Catalogue

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Bronze Casting Production Process

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