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IS 12858:2002 is the Indian Standard (BIS) for anodized aluminium sections for doors, windows and ventilators. This standard specifies the requirements for anodized wrought aluminium alloy extruded hollow and solid sections for use in the fabrication of doors, windows, ventilators, and partitions. It covers material composition, dimensional tolerances, and various grades of anodic coatings based on thickness and intended use (interior/exterior), along with the test methods to verify their quality.
Specifies dimensions, properties, and anodizing requirements for aluminium sections for doors, windows and ventilators.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Always specify Grade AC 25 for exterior applications, especially in coastal or industrial areas, to prevent premature corrosion and chalking.
! The quality of sealing is as important as the thickness. Insist on the sealing test (acid dissolution test) report from the supplier.
! Visual uniformity of color and finish is important, but does not guarantee performance; physical test reports for thickness and sealing are mandatory for quality assurance.
Consolidated list per BIS. For the text of each amendment, refer to the BIS portal link above.
aluminiumanodizingextruded sections
International Equivalents
Similar International Standards
AAMA 611-22Fenestration and Glazing Industry Alliance (FGIA), USA
HighCurrent
Voluntary Specification for Anodized Architectural Aluminum
Specifies performance requirements and test procedures for Class I and Class II anodized finishes on architectural aluminum.
BS EN 12373-1:2001BSI (British Standards Institution), UK / CEN (European Committee for Standardization), Europe
HighCurrent
Aluminium and aluminium alloys - Anodizing - Part 1: Method for specifying decorative and protective anodic oxidation coatings on aluminium
Provides a framework for specifying anodic coatings, including thickness classes directly comparable to IS 12858.
ISO 7599:2018ISO (International Organization for Standardization), International
MediumCurrent
Anodizing of aluminium and its alloys — General specifications for anodic oxidation coatings on aluminium
Provides general specifications for anodizing, forming the basis for many national standards, but is not specific to architectural sections.
JIS H 8601:2018JSA (Japanese Standards Association), Japan
MediumCurrent
Anodic oxide coatings on aluminium and aluminium alloys
Defines quality and testing for anodic oxide coatings, widely used in Japan and Asia for various applications including architecture.
Key Differences
≠IS 12858 specifies grades based on thickness (e.g., AC 15 for 15 µm). AAMA 611 uses Class I (≥18 µm) for exterior architectural use and Class II (≥10 µm) for interior, setting a higher minimum thickness for demanding applications.
≠The reference test for sealing quality in IS 12858 is a qualitative dye spot test (IS 6911). AAMA 611 mandates a quantitative Acid Dissolution Test (ASTM B680) with a specific maximum mass loss, considered more stringent.
≠Corrosion resistance requirements differ significantly. IS 12858 (Grade AC 15) requires 240 hours in an Acetic Acid Salt Spray (AASS) test, whereas AAMA 611 (Class I) requires a much longer duration of 3000 hours.
≠IS 12858 relies on visual comparison for color uniformity. In contrast, AAMA 611 allows for instrumental color measurement (ASTM D2244) and specifies a maximum color difference (ΔE), providing a more objective criterion.
Key Similarities
≈All standards link coating performance directly to its thickness, specifying different minimum thickness classes or grades for varying service conditions (e.g., interior vs. exterior).
≈The underlying purpose is identical: to specify requirements for a durable, corrosion-resistant, and aesthetically acceptable anodic oxide coating on aluminum profiles for architectural use.
≈All standards are predicated on the use of suitable wrought aluminum alloys, typically from the 6xxx series (like 6063), which are known for their extrudability and suitability for high-quality anodizing.
≈They all mandate fundamental quality control tests, including visual inspection for defects, and tests for coating thickness and sealing quality, even though the specific methods and acceptance criteria may vary.
What is the minimum anodizing thickness for an exterior window?+
For Grade AC 25 (Exterior Architectural), the minimum average thickness is 25 microns and the minimum local thickness is 20 microns (Table 1).
Which aluminium alloy is specified?+
Aluminium alloys conforming to IS 733, such as Grade 6063 (HE9), are specified for these sections (Clause 3.1 & Table 2).
How is the quality of the anodic coating checked?+
Key tests include measuring coating thickness (IS 6012), quality of sealing (IS 8688), and abrasion resistance (IS 5523) (Clause 6).
What do the different anodizing grades mean?+
Grades like AC 25, AC 20, AC 15, and AC 10 define the minimum average coating thickness in microns, corresponding to different levels of durability and intended use (Table 1).