ASTM B221 Extruded Aluminum Alloy Tubes for General Purpose Applications.
ASTM B221 – 14 Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes. ASTM B221 PDF free download
ASTM B221 Extruded Aluminum Alloy Tubes for General Purpose Applications.
ASTM B221 – 14 Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes. ASTM B221 PDF free download