History of Aluminum at Airstream
1947 Heat-treatable copper-alloyed 24ST. Side and end panel sheets were 0.032 inches think supplied by
Kaiser Aluminum. Metal could be heat-treated to be as strong as mild steel. Material had high-purity
aluminum cladding rolled on one side that made it brighter and more corrosion-resistant.
1960s Alcoa became the supplier of choice. Same grade of aluminum now called Alclad 2024-T3.
1970s (early) Experimented using 6061-T6 aluminum, a less expensive heat-treatable grade.
1970s (late) Alcoa supplied 3004-H18 Brite panels, 0.032“ thick.
1983-1993 Alcoa supplied a “Controlled Mill Finish” in a 3003-H18 and 3005-H18 grade – lower cost material in
place of heat-treated aluminum.
1993-1994 Airstream widened the body, requiring stronger aluminum for the weight. Side and end panels remained
3003 or 3004-H18 but thickness increased to 0.040 “.
12-22-1992
to 7-31-95
Alumax coating: Serial Numbers 509137 through 510640; 7-31-95 1996 Model
7-31-95
to 1/1997
Alumax ends with trailer #510640 and we switched to Yenkin-Majestic as Plasticoat supplier. Used and
sold to dealers until it was pulled on 1-1997
1-1997 We switched to Akzo as Plasticoat supplier.
1998 We started using Alcoa pre-coated metal:
Partial start in 1998; currently still use.
Exceptions:
512502 all Alcoa except seg#25 out of Alumax 8-7-1998
512503 all out of Alumax
512504 all Alcoa except seg#25 out of Alumax
512505 all Alcoa except seg#25 out of Alumax
512506 all Alcoa except seg#25 out of Alumax
512507 all out of Alumax
512508 all Alcoa except seg#25 out of Alumax
512509 all out of Alumax
512510 all Alcoa except seg#25 out of Alumax
512511 all out of Alumax
512512 all Alcoa except seg#25 out of Alumax
512514 all Alcoa except seg#25 out of Alumax
512516 all Alcoa except seg#25 out of Alumax
512518 all Alcoa except seg#25 out of Alumax
512520 all Alcoa except seg#25 out of Alumax
512521 all Alcoa except seg#25 out of Alumax
512522 all Alcoa except seg#25 out of Alumax
512524 start 27FT tralers and longer all out of Alcoa 8-19-1998
512613 begin all units are Alcoa 9-8-1998.
5-1999 We started using llow voc plastic by Akzo –still currently in use.
Note
: 6063-T5 grade aluminum –corrosion-resistant. With simple heat treatment, 6063-T5 is as strong as mild steel.
Currently used for extrusion and ribs.