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Alloy Specifications, Chemistries, and Technical Data

C84400 LEADED SEMI RED BRASS
Aliases
CDA NUMBER C84400
Common Name 81-3-7-9
Alias C844
Alias 844
Alias 123
Alias Valve Composition Brass
Alias 81
Alias 81 Metal
Nearest Applicable Casting Standards
ASTM (B Series) B584
Federal (QQ-C- Series) 390
Specification Composition
Minimum Maximum
Copper (Cu) 78 82
Tin (Sn) 2.3 3.5
Lead (Pb) 6 8
Zinc (Zn) 7 10
Iron (Fe) 0.4
Antimony (SB) 0.25
Nickel (Ni) 1
Sulphur (S) 0.08
Phosphorous (P) 0.02
Aluminum (Al) 0.005
Silicon (Si) 0.005
Copper + Sum of Named Elements 99.3
Phosphorous shall be 1.5%, Max for continuous castings 1.5
Specification Properties
(Heat Treat 'F' Denotes As Cast) Heat Treat State Minimum
Tensile Strength (ksi) 29
Yield Strength (.5% extension under load) (ksi) F 13
Typical Properties
Heat Treat State Typical
Modulus of Elasticity (ksi) 13000
Hardness (Brinell) (HB @ 500kg) 55
Machinability (% of free cutting brass) 90
Impact Strength (Izod) (ft-lb) 8
Melting Range (Liquidus-Solidus)(F) 1540-1840
Coefficient of Thermal Expansion (per F @ 68-400F) 0.000010
Thermal Conductivity (Btu/sq.ft/ft./hr/F @ 68F) 41.9
Specific Heat (Btu/lb/F @ 68F) 0.09
Electrical Conductivity (% IACS @ 68F) 16.4
Density (lb/cu.in. @ 68F) 0.314
Pouring Temperature (Light Castings) (F) 2100-2300
Pouring Temperature (Heavy Castings) (F) 1950-2150
Patternmakers Shrinkage (in/ft) 3/16
Drossing Medium
Gassing Medium
Fluidity Medium
Elongation (2 inch gauge length) (%) F 28
Reduction of Area (%) F 25
Corrosion Resistance*
*While corrosion reistance is listed for food products, certain alloys may be unacceptable for other reasons.
Acetate Solvents Excellent Resistance
Acetic Acid, 20 % Not Recommended
Acetic Acid, 50% Not Recommended
Acetic Acid, Glacial Not Recommended
Acetone Excellent Resistance
Acetylene Explosive!
Alcohols Excellent Resistance
Aluminum Chloride Not Recommended
Aluminum Sulfate Not Recommended
Ammonia, Moist Gas Not Recommended
Ammonia,Moisture-Free Excellent Resistance
Ammonium Chloride Not Recommended
Ammonium Hydroxide Not Recommended
Ammonium Nitrate Not Recommended
Ammonium Sulfate Not Recommended
Aniline and Aniline Dyes Not Recommended
Asphalt Excellent Resistance
Barium Chloride Not Recommended
Barium Sulfide Not Recommended
Beer Not Recommended
Beet Sugar Syrup Excellent Resistance
Benzine Excellent Resistance
Benzol Excellent Resistance
Boric Acid Excellent Resistance
Butane Excellent Resistance
Calcium Bisulfite Not Recommended
Calcium Chloride (acid) Acceptable
Calcium Chloride (alkaline) Not Recommended
Calcium Hydroxide Not Recommended
Calcium Hypochlorite Not Recommended
Cane Sugar Syrups Excellent Resistance
Carbon Dioxide, Dry Excellent Resistance
Carbon Dioxide, Moist Not Recommended
Carbon Tetrachloride, Dry Excellent Resistance
Carbon Tetrachloride, Moist Acceptable
Carbonated Beverages Not Recommended
Chlorine, Dry Excellent Resistance
Chlorine,Moist Not Recommended
Chromic Acid Not Recommended
Citric Acid Excellent Resistance
Copper Sulfate Not Recommended
Cottonseed Oil Excellent Resistance
Creosote Not Recommended
Ethers Excellent Resistance
Ethylene Glycol Excellent Resistance
Ferric Chloride,Sulfate Not Recommended
Ferrous Chloride, Sullate Not Recommended
Formaldehyde Excellent Resistance
Formic Acid Acceptable
Freon Excellent Resistance
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 Not Recommended
Liquor,Black Not Recommended
Liquor,Green Not Recommended
Magnesium Chloride Not Recommended
Magnesium Hydroxide Acceptable
Magnesium Sullate Not Recommended
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 Not Recommended
Oxalic Acid Not Recommended
Phosphoric Acid Not Recommended
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 Not Recommended
Soap Solutions Not Recommended
Sodium Bicarbonate Excellent Resistance
Sodium Bisulfate Not Recommended
Sodium Carbonate Not Recommended
Sodium Chloride Acceptable
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 Acceptable
Stearic Acid Excellent Resistance
Sulfur Chloride Not Recommended
Sulfur Dioxide, Dry Excellent Resistance
Sulfur Dioxide, Moist Not Recommended
Sulfur Trioxide, Dry Excellent Resistance
Sulfur, Solid Not Recommended
Sulfuric Acid, 78% or Less Not Recommended
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 Acceptable
Trichlorethylene, Dry Excellent Resistance
Trichlorethylene, Moist Excellent Resistance
Turpentine Excellent Resistance
Varnish Excellent Resistance
Vinegar Not Recommended
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
Air
Body
Bonnet
Burner Coil Elbow
Fittings
Fixtures
Gas Fittings
General Hardware Fittings
Generator Contact
Gland
Ornamental Castings
Plug
Plumbing Supplies
Pump Bodies
Rack Carrier
Stops
Valves - Low Pressure Bodies
Wastes
Great Castings
         St. Paul Foundry 954 Minnehaha Ave West St. Paul MN 55104 651-488-5567 www.stpaulfoundry.com
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954 Minnehaha Avenue West
Saint Paul, Minnesota 55104
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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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