Specifications for Architectural Metal Castings

Use of existing castings to create patterns for new castings and new patternwork:
1. Shrinkage: If using existing castings to use as a pattern the shrinkage rate will be 1/8″ per linear foot; therefore, the new castings will be smaller than the original.

2. To create new castings, a detailed drawing will need to be forwarded showing draft, section view, dimensions, scale preferred as 1″ = 1 foot, quantities required and the preferred alloy.

3. AAM can generate the drawing from a sketch or photo of the original component to be produced.

Cast Alloys:
1. Cast Iron, class 30 gray iron, ASTM A48
2. Ductile Iron, 65-45-12 A-536
3. Cast Aluminum alloy #319, 356, A-356 (virgin alloy)
4. Cast Bronze: Silicone Bronze, Everdur– color can
be altered with alternate alloys
5. Stainless Steel: Alloy #316

Painted Finishes:
1. Aluminum: Primer two component epoxy, followed
by polyurethane enamel.
2. Iron/Steel: Zinc chromate primer, two component
epoxy primer, with top coating of acrylic
polyurethane (color to be determined, or color
match # and mfg.)
3. Antique finish/custom finish, hand rubbed and
wiped dry.

Ferrous Metals Data:

Properties of Cast Iron:

Minimum Typical Maximum
Ultimate Tensile Strength PSI 20,000 25,000 30,000
Yield Tensile Strength PSI usually not specified, 0.5%
Traverse Test Deflection, inch .14 .17 .20
Hardness, Brinell BHN 170 187 229

Properties of Ductile Iron (as cast):

Minimum Typical Maximum
Ultimate Tensile Strength PSI 80,000 85,000 100,000
Yield Tensile Strength PSI 55,000 65,000 75,000
Elongation % in 2 6.0 8.0 12.0
Hardness, Brinell BHN 187 217 255

Properties of Steel Fabrications Cast Products:

Minimum Typical Maximum
Ultimate Tensile Strength PSI 60,000 65,000 70,000
Yield Tensile Strength PSI 30,000 35,000 38,000
Elongation % in 2 28.0 33.0 36.0
Hardness, Brinell BHN 120 130 140