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Alloy Specifications, Chemistries, and Technical Data

C87200 SILICON BRASS AND BRONZE
Aliases
CDA NUMBER C87200
Common Name 12A
Alias Everdur
Alias C872
Alias 872
Alias Silicon Bronze
Nearest Applicable Casting Standards
ASTM (B Series) B584
SAE (J Series) J462
Federal (QQ-C- Series) 390
Military (Mil-C- Series) 22229
Specification Composition
Minimum Maximum
Copper (Cu) 89
Tin (Sn) 1
Lead (Pb) 0.5
Zinc (Zn) 5
Iron (Fe) 2.5
Antimony (SB) 8
Aluminum (Al) 1.5
Manganese (Mn) 1.5
Silicon (Si) 1 5
Specification Properties
(Heat Treat 'F' Denotes As Cast) Heat Treat State Minimum
Tensile Strength (ksi) F 45
Yield Strength (.5% extension under load) (ksi) F 18
Typical Properties
Heat Treat State Typical
Modulus of Elasticity (ksi) 15000
Hardness (Brinell) (HB @ 3000kg) 85
Machinability (% of free cutting brass) 40
Impact Strength (Izod) (ft-lb) 33
Shear Strength (ksi) 28
Compressive Strength (0.001 in. set/in.) (ksi) 18
Compressive Strength (0.010 in. set/in.) (ksi) 60
Melting Range (Liquidus-Solidus)(F) 1580-1780
Thermal Conductivity (Btu/sq.ft/ft./hr/F @ 68F) 16.4
Specific Heat (Btu/lb/F @ 68F) 0.09
Electrical Conductivity (% IACS @ 68F) 6
Density (lb/cu.in. @ 68F) 0.302
Patternmakers Shrinkage (in/ft) 1/4
Drossing Low
Gassing High
Fluidity High
Elongation (2 inch gauge length) (%) F 30
Corrosion Resistance*
*While corrosion reistance is listed for food products, certain alloys may be unacceptable for other reasons.
Acetate Solvents Acceptable
Acetic Acid, 20 % Acceptable
Acetic Acid, 50% Acceptable
Acetic Acid, Glacial Excellent Resistance
Acetone Excellent Resistance
Acetylene Explosive!
Alcohols Excellent Resistance
Aluminum Chloride Not Recommended
Aluminum Sulfate Excellent Resistance
Ammonia, Moist Gas Not Recommended
Ammonia,Moisture-Free Excellent Resistance
Ammonium Chloride Not Recommended
Ammonium Hydroxide Not Recommended
Ammonium Nitrate Not Recommended
Ammonium Sulfate Excellent Resistance
Aniline and Aniline Dyes Not Recommended
Asphalt Excellent Resistance
Barium Chloride Not Recommended
Barium Sulfide Not Recommended
Beer Acceptable
Beet Sugar Syrup Acceptable
Benzine Excellent Resistance
Benzol Excellent Resistance
Boric Acid Excellent Resistance
Butane Excellent Resistance
Calcium Bisulfite Acceptable
Calcium Chloride (acid) Not Recommended
Calcium Chloride (alkaline) Acceptable
Calcium Hydroxide Not Recommended
Calcium Hypochlorite Not Recommended
Cane Sugar Syrups Acceptable
Carbon Dioxide, Dry Excellent Resistance
Carbon Dioxide, Moist Acceptable
Carbon Tetrachloride, Dry Excellent Resistance
Carbon Tetrachloride, Moist Excellent Resistance
Carbonated Beverages Not Recommended
Chlorine, Dry Excellent Resistance
Chlorine,Moist Not Recommended
Chromic Acid Not Recommended
Citric Acid Excellent Resistance
Copper Sulfate Excellent Resistance
Cottonseed Oil Excellent Resistance
Creosote Acceptable
Ethers Excellent Resistance
Ethylene Glycol Excellent Resistance
Ferric Chloride,Sulfate Not Recommended
Ferrous Chloride, Sullate Not Recommended
Formaldehyde Excellent Resistance
Formic Acid Not Recommended
Freon Acceptable
Fuel Oil Excellent Resistance
Furfural Excellent Resistance
Gasoline Excellent Resistance
Gelatin Excellent Resistance
Glucose Excellent Resistance
Glue Excellent Resistance
Glycerine Excellent Resistance
Hydrochloric or Muriatic Acid Not Recommended
Hydrofluoric Acid Acceptable
Hydrofluosilicic Acid Not Recommended
Hydrogen Excellent Resistance
Hydrogen Peroxide Not Recommended
Hydrogen Sulfide, Moist Not Recommended
Hydrogen Sulfide,Dry Not Recommended
Lacquer Thinners Excellent Resistance
Lacquers Excellent Resistance
Lactic Acid Not Recommended
Linseed Oil Excellent Resistance
Liquor, White Acceptable
Liquor,Black Acceptable
Liquor,Green Acceptable
Magnesium Chloride Acceptable
Magnesium Hydroxide Acceptable
Magnesium Sullate Acceptable
Mercury, Mercury Salts Not Recommended
Milk Excellent Resistance
Molasses Excellent Resistance
Natural Gas Excellent Resistance
Nickel Chloride Not Recommended
Nickel Sulfate Not Recommended
Nitric Acid Not Recommended
Oleic Acid Acceptable
Oxalic Acid Acceptable
Phosphoric Acid Excellent Resistance
Picric Acid Not Recommended
Potassium Chloride Not Recommended
Potassium Cyanide Not Recommended
Potassium Hydroxide Not Recommended
Potassium Sulfate Not Recommended
Propane Gas Excellent Resistance
Sea Water Acceptable
Soap Solutions Not Recommended
Sodium Bicarbonate Acceptable
Sodium Bisulfate Not Recommended
Sodium Carbonate Excellent Resistance
Sodium Chloride Not Recommended
Sodium Cyanide Not Recommended
Sodium Hydroxide Not Recommended
Sodium Hypochlorite Not Recommended
Sodium Peroxide Acceptable
Sodium Phosphate Excellent Resistance
Sodium Sulfate, Silicate Acceptable
Sodium Sulfite, Thiosulfate Not Recommended
Soduim Nitrate Excellent Resistance
Stearic Acid Excellent Resistance
Sulfur Chloride Not Recommended
Sulfur Dioxide, Dry Excellent Resistance
Sulfur Dioxide, Moist Acceptable
Sulfur Trioxide, Dry Excellent Resistance
Sulfur, Solid Not Recommended
Sulfuric Acid, 78% or Less Acceptable
Sulfuric Acid, 78% to 90% Not Recommended
Sulfuric Acid, 90% to 95% Not Recommended
Sulfuric Acid, Fuming Not Recommended
Tannic Acid Excellent Resistance
Tartaric Acid Excellent Resistance
Toluene Excellent Resistance
Trichlorethylene, Dry Excellent Resistance
Trichlorethylene, Moist Excellent Resistance
Turpentine Excellent Resistance
Varnish Excellent Resistance
Vinegar Acceptable
Water, Acid Mine Not Recommended
Water, Condensate Excellent Resistance
Water, Potable Excellent Resistance
Whiskey Not Recommended
Zinc Chloride Not Recommended
Zinc Sulfate Not Recommended
Applications
Bearings
Bells
Boat Propellers - Small
Hex Nut Adjuster
Impellers
Marine Fittings
Pump Parts
Rocker Arms
Sculpture
Statuary
Valve Stems
Great Castings
         St. Paul Foundry 954 Minnehaha Ave West St. Paul MN 55104 651-488-5567 www.stpaulfoundry.com
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St. Paul Foundry
954 Minnehaha Avenue West
Saint Paul, Minnesota 55104
(651) 488-5567  Fax: (651) 488-0908
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Alloy Guide Sheet Terms of Use

Use Good Design Principles

1. St. Paul Foundry is providing this information on metal characteristics for informational purposes only. Before making a final decision on alloy selection consider the following and all other appropriate design and specification principles. Please note that this is not an exhaustive list.

2. Consult the appropriate specification from an accredited specifying body (ASTM, SAE, Federal or Military) to determine current minimum values of this alloy.

3. Use appropriate design safety factors.

4. Use Failure Modes and Effects Analysis to help identify possible weaknesses in designs and specifications.

5. Use computerized stress analysis tools.

6. Use appropriate certification requirements for your casting suppliers. These may include test bars, chemical certifications, radiography, dye penetrant or other non-destructive testing methods.

7. Test your design to failure in a controlled environment. Then test it to failure in a simulation of its end use.

8. You and you alone are responsible for the suitability of your design and the materials that you select.

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