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Product Details, Specifications, and Technical Information

See Bronze Tolerances

Bronze Round Bar 642 is an aluminum-silicon bronze that offers high strength, excellent corrosion resistance, good fatigue resistance, anti-galling properties, and high machinability. 642 has the highest machinability rating of any non-leaded bronze, additionally the high aluminum and silicon contents make this one of the lightest bronzes. Brazing and most forms of welding are only rated as fair though. This material is typically used to make blots, gears, and valves.

shape Image
Dimension Name Specification
Max Length 144
Diameter 0.75
Alloy 642
MTR Availability Yes
Full Length true
Material Bronze
Shape Bar-Round
Custom Cut Warehouse 1
Material Specifications

This material meets the following specs: ASTM -B150, AMS -4634

Weight/Lineal Foot
1.52 pounds
Please note that this data is to be used ONLY FOR REFERENCE, NOT FOR DESIGN, and by using it,you agree that any decisions you make regarding materials for your project are at your own discretion.
Mechanical Properties
Property Value
Brinell Hardness 500 kg load 130 min
Rockwell Hardness B Scale 80 min
Density g/cm^3 7
Elongation Typical % 14
Melting Point °F 1800 - 1840
Modulus of Elasticity KSI x 10^3 16
Specific Heat BTU/lb-°F 9
Thermal Conductivity BTU-in/hr-ft^2-°F 312
Tensile Strength KSI 75 min
Shear Strength KSI 56
Yield Strength KSI 35 min
Chemistry Information: 642 Bronze
Element Percentage
Si 1.5 - 2.2
Al 6.3 - 7.6
Cu 88.2 - 92.2
Zn 0 - 0.5
Fe 0 - 0.3
Ni 0 - 0.25
Sn 0 - 0.2
As 0 - 0.15
Mn 0 - 0.1
Pb 0 - 0.05
Residual 0 - 0.5
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