B04 is a “GREEN” non-leaded alloy Copper-Bismuth Bronze C89835 Federalloy III (932 Version)
Bunting continuous cast bronze bars of B04 give superior quality and performance. Continuous casting achieves a high density grain structure, free of porosity, resulting in a reduction of tool wear and component rejects. Solid and cored bars are stocked in 13" increments and 105" lengths, and are available in other lengths and non-standard sizes. Consider bars for use when you need special bearings, bearings for prototypes, or for emergency repairs.
Typical Properties: (Not to be used for specification purposes.) Copper: 85.00 – 89.00% Tin: 6.00 – 7.50% Lead: 0.10% max. Zinc: 2.00 – 4.00% Nickel: 0.50 – 1.00% Bismuth: 1.70 – 2.70%
Physical Properties: Continuous Cast Tensile Strength, PSI:30,000 min. Yield Strength, PSI:14,000 min. Elongation:12% min. Machinability Rating:70. Minimum Operating Temperature:-450°F. Maximum Operating Temperature:500°F.
B04 is used as a no-lead replacement for C93200 material where lead-free material is required. Properties are similar to the C93200 material however; bismuth does not lubricate as well as lead so a constant supply of lubrication is recommended when using this material. Bunting also produces lead-free materials that replace C83600, C84400, C93700, C93800 and C94500 with bismuth alloys.
