What are the primary aluminium alloys specified in this standard?

The code specifies alloys such as 19000 (commercially pure), 3105, 31000, and 52000, with their properties referenced from IS 737.

What is the standard corrugation profile defined by IS 14457?

The standard profile has a pitch of 75 mm and a depth of 17.5 mm (Clause 5.4).

What is the minimum elongation required for Alloy 3105 in H18 temper?

A minimum elongation of 3% on a 50 mm gauge length is required (Table 2).

What markings should be present on the sheets?

Each sheet or bundle should be marked with the manufacturer's name, alloy and temper designation, dimensions, and the Standard Mark (ISI mark) (Clause 11).

IS 14457

: 1997

Aluminium alloy corrugated sheets for roofing and cladding

CurrentSpecializedSpecificationBIMMaterials Science · Roofing Materials

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This standard specifies the requirements for wrought aluminium and aluminium alloy corrugated sheets intended for roofing, cladding, and general purposes. It covers material alloys, temper, dimensions, tolerances, mechanical properties, finish, and testing procedures.

Specifies requirements for corrugated sheets made from aluminium alloys for roofing and cladding.

Quick Reference Values

Standard Corrugation Pitch75 ± 1.5 mm

Standard Corrugation Depth17.5 ± 1.0 mm

Nominal Thickness Range0.40 mm to 1.60 mm

Min Tensile Strength (Alloy 3105-H18)180 MPa

Min 0.2% Proof Stress (Alloy 3105-H18)150 MPa

Tolerance on Sheet Width± 5 mm

Tolerance on Sheet Length+10 mm, -0 mm

Practical Notes

Ensure the specified alloy and temper (e.g., 3105-H18) match the structural and environmental requirements of the project.

Verify material test certificates upon delivery to confirm compliance with chemical composition and mechanical properties as per the standard.

To prevent galvanic corrosion, use compatible fasteners (e.g., stainless steel with insulating washers) when fixing aluminium sheets to steel structures.