IS 737 specifies wrought aluminium and aluminium alloy sheet and strip for general engineering. It covers 8 alloy grades from pure aluminium (19000) to heat-treatable alloys (63400) in various tempers. Used for roofing, cladding, bus bodies, enclosures, and general fabrication.
Specification for wrought aluminium and aluminium alloy sheet and strip covering grades, temper designations, mechanical properties, dimensional tolerances, and surface quality.
Key Values
19000 (pure Al) tensile OMin 65 MPa
52000 (Al-Mg) tensile H14Min 230 MPa
63400 (Al-Mg-Si) tensile T6Min 205 MPa
Practical Notes
! Grade 19000 (commercial pure aluminium) is the most common for roofing sheets and general use.
! Grade 52000 (Al-Mg alloy) offers much better strength than pure Al — use for structural cladding and marine applications.
! Temper 'O' is fully annealed (softest). H14 is half-hard. H18 is full-hard. T6 is heat-treated to peak strength.
! Aluminium does not rust but corrodes in alkaline environments — avoid direct contact with cement or lime.