ELEMENT
PERCENT
Others (total)
0.5
Within the chemical composition limits set forth above, cast aluminum
alloys shall conform to the following:
a.
Sand castings:
ASTM B 26/B 26M.
b.
Die casting:
ASTM B 85.
c.
Permanent mold castings:
ASTM B 108.
2.1.1.3
Welding Rods and Electrodes
Welding rods and bare electrodes shall conform to AWS A5.10/A5.10M as
recommended by the manufacturer of the aluminum base metal alloy being used.
2.1.1.4
Finish
Anodized finish on aluminum surfaces shall match in appearance or fall
within the two extremes of color range of the approved samples. The
following designation of finishes refer to standard finishes as defined in
the NAAMM MFM. Aluminum used for framing shall have a color anodized
finish designation AA-MIO-C22-A34 and AA-MIOC22-A44, meeting the
requirements of AAMA 611.
2.1.1.5
Strength
Aluminum extrusions for framing members used in curtain walls and main
frame and sash or ventilator members in windows shall have a minimum
ultimate tensile strength of 152 MPa 22,000 psi and a minimum yield
strength of 110 MPa 16,000 psi.
2.1.2
Bronze
Bronze sheets, tubes, and drawn shapes shall be commercial bronze, alloy
No. 220. Extruded shapes shall be architectural bronze, alloy No. 385.
Rolled or drawn rods shall be [commercial bronze, alloy No. 220] [or]
[architectural bronze, alloy No. 385]. Bronze used for [_____] shall have
a [_____] finish.
2.1.3
Copper
Conform to ASTM B 152M ASTM B 152, hot or cold-rolled of the temper
suitable for the respective forming operations.
2.1.4
Carbon Steel
Conform to the following specifications:
a.
Rolled shapes, plates, and bars:
ASTM A 36/A 36M.
b.
Galvanized sheets:
ASTM A 653/A 653M.
c.
Sheets for porcelain enameling:
ASTM A 424.
d.
Other sheets:
ASTM A 570/A 570M or ASTM A 611.
SECTION 08900
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