Furnace Room
8981 SE 76th Drive Portland Or U.S.A. Phone 503-771-3346 Fax 503-771-9702 E Mail barrcast@barrcasting.com

   We offer many different alloys for you to choose from.  This page, in particular, is dedicated to giving the specifications for #421 Manganese bronze.  The ingot numbers that you find listed in the furnace room pages, such as #421 Manganese bronze., are the alloys that we have found to be the most popular, and are arranged in three main categories (Bronze, Aluminum, and Zinc.)  We have an inventory of each of the alloys listed in the furnace room pages, while other alloys are available on request.

(Tip) Please keep in mind that each alloy is engineered for a particular purpose. For example, sheet metal can require different characteristics of an alloy than tubing, extruded metal or sand casting .  Because certain projects require different alloy characteristics, we certify our alloys.  Not all foundries offer alloy certification, and some cast their parts from mixed alloys of scrap.  This can greatly weaken an alloy, or make it unpredictable.  If you have a particular purpose, that will require the full strength of your metals property's with predictable result's, then certified material is crucial.   At Barr Casting we keep a record of the certifications for each new bundle of ingot.

Please note: In the designation system, numbers from C1000 through C7999, denote wrought alloys. Cast alloy UNS No. numbers start at C80000 through C99999

Note: The unified numbering system (UNS) is an alloy designation system, widely accepted in North America.

#421 Manganese bronze
UNS No C86500---------- To go back to the home page  or to choose other bronze or aluminum alloys.

Out of respect for our employees and the environment we do not pour alloys with more than 3% lead. Alloy #421 (0 lead)
  We provide this service using only certified materials.

Major uses: Valve Stems, Gears, Bearings, Cam, Brackets, Marine Hardware, Bushings Screw down nuts, Propellers
    Please let us know if you find errors in my work .Thank you for your input.
Name  Low Tensile Manganese Bronze
UNS No. C86500  
Ingot No. 421  
Percent By weight of    
Copper 58  
Iron 1  
Aluminum 1  
Typical Properties    
Weight, lbs./in 0.301  
Pattern maker's shrink rule,in/ft  1/4  
Tensile strength,ksi 71  
Yield strength,ksi 28  
Elongation,% in 2" 30  
Brunell hardness(3000)Kg) 100  
Machinability 26  
Heat Treatment (1hr/1n thickness) No Response  

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