Dates when Luxfer changed its aluminum alloy from 6351 to 6061

Between 1987 and 1988, Luxfer Gas Cylinders discontinued use of 6351 aluminum alloy and began using a proprietary version of 6061 aluminum alloy for all its aluminum cylinder models manufactured in the United States. Listed below are the dates by model number when the transitions to the new alloy occurred. Any current Luxfer models that do not appear on this list were never made from 6351 alloy in the first place and have always been made from Luxfer’s proprietary 6061 alloy.

SCUBA

S30, S63 -May 1988

S40 – June 1988

S50, S92 – April 1988

S72, S100 – August 1987

S80 – January 1988

S808 – May1987

SCBA

L7, L8, L13 – September 1987

L13 – May 1988

L15 – January 1989

L26 – February 1988

L45 – November 1987

CO2

C1.2, C1.5 – January 1989

C2 – November 1988

C10 – August 1988

C5 – June 1988

C15 – November 1987

C20, C35 – April 1988

C50 – February 1988

Medical

M9 – January 1988

MD15, ME24 – December 1987

Industrial Gas

N22, N150 – May 1988

N33 – November 1988

N60, N122 – December 1987

N88 – December 1988