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C86300 Manganese Bronze


Tough and corrosion resistant, C86300 (SAE 430B) Manganese Bronze is ideal for high load, low speed applications that require a combination of outstanding wear characteristics and high bearing strength. Despite its strength characteristics, however, this manganese bronze alloy is not heat-treatable, needs reliable lubrication and should be used in conjunction with hardened shafts. The lead in the alloy's makeup improves machinability without materially affecting its mechanical properties.


Typical Applications

Builders Hardware

Brackets

Electrical

Switches, Electrical Components

Fasteners

Screw Down Nuts, Screw Down Nuts

Industrial

Bushings, High Strength Machine Parts, Hooks, Frames, Struts, Gears, Bridge Pins, Propellers, Hydraulic Cylinder Parts, Large Valve Stems, Slow Speed, Heavy Load Bearings, Gib, Cams, Hydraulic Cylinder Parts, Forming Dies for Wood Pulp Industry, Wear Rings for Forming Dies for Wood Pulp Industry

Marine

Marine Hardware, Clamps, Covers for Marine Hardware, Boat Parts, Rudders


Chemical Composition

*In determining copper minimum, copper may be calculated as copper plus nickel

Cu%Sn%Pb%Zn%Fe%Ni%Sb%P%S%AI%Mn%Si%
60.00-
66.00
0.200.2022.00-
28.00
2.00-
4.00
*1.00N/AN/AN/A5.00-
7.50
2.50-
5.00
N/A

Mechanical Properties

Tensile Strength. min110 ksi758 MPa
Yield Strength @ .5% ext under load min62 ksi427 MPa
Elongation in 2 in. or 50 mm min, %14
Brinell Hardness223
Machinability Rating8%

Physical Properties

 US CustomaryMetric
Melting Point-Liquidus1693 °F
923 °C
Melting Point-SOlidus1625 °F
885 °C
Density0.283 lb/in 3
@ 68 °F 
7.83 gm/cm 3
@ 20 °C 
Specific Gravity7.8307.83
Electrical Resistivity130.80 ohms-cmil/ft
@ 68 °F 
21.74 microhm-cm
@ 20 °C 
Electrical Conductivity8%  IACS  
@ 68 °F 
0.046 MegaSiemens/cm
@ 20 °C 
Thermal Conductivity20.5 Btu/sq ft/ft hr/°F
@ 68 °F 
35.5 W/m
@ 20 °C 
Coefficient of
Thermal Expanision
12 ⋅ 10-6 per °F
 (68-572 °F) 
20.7 · 10-6 per °C
(20-300 °C) 
Specific Heat Capacity0.09 Btu/lb/°F
@ 68 °F 
377.1 J/kg
@ 293 K
Modulus of Elasticity
in Tension
14200 ksi97900 MPa
Magnetic Permeability*1.09
1.09
*Field Strength 16 kA/m

Fabrication Properties

Joining TechniqueSuitability
SolderingPoor
BrazingPoor
Oxyacetylene WeldingPoor
Gas Shielded Arc WeldingPoor
Coated Metal Arc WeldingGood

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