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C67300 Manganese Bronze


This is a high strength leaded silicon manganese bronze with typically good bearing qualities. This alloy maintains high impact resistance with excellent machinability making it well suited for clutch bearings, shaft bushings, sleeve bearings, thrust bearings, pump parts, drive shafts, bearing pins, wear plates, gears and cams. Resists squashing out under high loads and extreme wear applications.


Typical Applications

Fasteners

Fasteners, Lead Screw Nuts

Industrial

Gears and Cams, Wear Plates, Bushings, Seal Rings, Idler Pins, Piston Heads, Brearing Pins, Thrust Bearings, Sleeve Bearings, Propeller Shafts, Shaft Bushings, Clutch Bearings, Drive Shafts, Spindles, Pump Parts, Bearings

Marine

Hardware, Valve Seats

Other

Connecting Rods


Chemical Composition

Cu%Sn%Pb%Zn%Fe%Ni%AI%Mn%Si%
58.0 -
63.0

0.30
0.40 -
3.0

Rem.

0.5

0.25

0.25
2.0 -
3.5
0.50 -
1.5

Mechanical Properties

Mechanical - H02 Half Hard: upto 1” inclusive
Tensile Strength, min65 ksi448 MPa
Yield Strength @ .5% ext under load min40 ksi276 MPa
Elongation in 2 in. or 50 mm min, %12
Brinell HardnessN/A
Machinability Rating70%
Mechanical - H02 Half Hard: over 1” to 3”  inclusive
Tensile Strength, min58 ksi400 MPa
Yield Strength @ .5% ext under load min35 ksi241 MPa
Elongation in 2 in. or 50 mm min, %15
Brinell Hardness, minN/A
Machinability Rating70%
Mechanical - H02 Half Hard: over  3”  
Tensile Strength, min55 ksi380 MPa
Yield Strength @ .5% ext under load min30 ksi205 MPa
Elongation in 2 in. or 50 mm min, %18
Brinell Hardness, minN/A
Machinability Rating70%

Physical Properties

 US CustomaryMetric
Melting Point-Liquidus1605 °F
874 °C
Melting Point-SolidusN/AN/A
Density0.3 lb/in 3
@ 68 °F
8.3 gm/cm 3
@ 20 °C
Specific Gravity8.38.3
Electrical ResistivityN/AN/A
Electrical Conductivity22% IACS
@ 68 °F
0.13  MegaSiemens/cm
@ 20 °C
Thermal Conductivity55 Btu/sq ft/ft hr/°F
@ 68 °F
95 W/m
@ 20 °C
Coefficient of
Thermal Expansion
11  ⋅ 10-6 per °F
(68-572 °F)
19 ⋅ 10-6 per °C
(20-300 °C)
Specific Heat CapacityN/AN/A
Modulus of Elasticity
in Tension
17000 ksi
117212 MPa
Magnetic PermeabilityN/AN/A

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