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 Silicon Bronze The ingot numbers that you find listed in the furnace room pages, such as Silicon 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

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

Silicon Bronze
UNS.No C87610 and C87300        To go back to the home page or to choose other bronze or aluminumalloys

Herculoy Bronze. Two of the silicon-copper bronzes deserve special attention. These are the Herculoy Regular and Herculoy Gear Bronzes. While the strength of Herculoy bronze compares with that of low-and medium-carbon steels, their corrosion resistance is close to that of pure copper. Below you will find the major uses for each alloy, in order to help you make an informed choice.
Major Uses: Bearings, Valve Parts, Rocker Arms, Pump Parts, Bells ,Propellers (small)Gears. Statuary & Plaques

Herculoy Regular is our most popular bronze.

Silicon Bronze

Herculoy Regular

Silicon Bronze


UNS.No C87610 C87300
Ingot No, 500 500
Percent by Weight 
Copper 92 95
zinc 4  
silicon 4 4
Manganese   1
Typical Properties
Weight, lb/in 0.302 0.295
Pattern Maker shrinkage,in/ft 3/16 3/16
Tensile strength, ksi 55 50
Yield strength ksi 25 20
Elongation%in 2" 30 30
Brinell hardness (500Kg) 85 80
Machinabilty rating 40 35  
Heat treatment No Response No Response

                                       Is it Brass, or is it Bronze?

              Is it bronze or brass?

Back to the Home Page