Similar International Standards
ASTM B26 / B26M - 23ASTM International, USA
HighCurrent
Standard Specification for Aluminum-Alloy Sand Castings
Directly specifies requirements for aluminum alloy sand castings, covering alloys, properties, and testing.
EN 1706:2020CEN (European Committee for Standardization), Europe
HighCurrent
Aluminium and aluminium alloys - Castings - Chemical composition and mechanical properties
Covers all aluminum casting processes including sand casting (designated 'S'), specifying alloys and properties.
JIS H 5202:2010JSA (Japanese Standards Association), Japan
MediumCurrent
Aluminium alloy castings
A general standard for aluminum alloy castings where sand casting is a primary method covered.
BS 1490:1988BSI (British Standards Institution), UK
HighWithdrawn
Specification for aluminium and aluminium alloy ingots and castings for general engineering purposes
Historically, IS 2109 was closely aligned with this British standard's alloy designations and properties.
Key Differences
≠Alloy Designation System: IS 2109 uses a four-digit numerical system (e.g., 4600 for Al-Si-Cu). In contrast, ASTM uses the Aluminum Association (AA) system (e.g., 319.0), and EN uses an alpha-numeric system (e.g., EN AC-46000), which requires cross-reference tables for proper comparison.
≠Mandatory Mechanical Properties: ASTM B26 and EN 1706 mandate yield strength (0.2% proof stress) for most heat-treated alloys. IS 2109 primarily specifies Ultimate Tensile Strength (UTS) and elongation, with yield strength and hardness often being optional or not specified for certain alloys.
≠Temper Designation: International standards use a standardized temper designation system (e.g., T6 for solution heat-treated and artificially aged). IS 2109 uses its own designations like 'TB7' for the same condition, which is not harmonized internationally.
≠Chemical Composition Purity: International standards, particularly ASTM for alloys like A356.0, often specify stricter limits for impurities like iron (Fe) compared to their IS equivalents (e.g., IS 4425). Lower iron content in ASTM A356.0 results in superior ductility.
Key Similarities
≈Core Alloy Families: All standards cover the same fundamental alloy systems for sand casting, including Al-Si, Al-Si-Cu, Al-Si-Mg, and Al-Mg, which form the backbone of general engineering castings.
≈Use of Separately Cast Test Bars: All standards specify that mechanical properties must be determined from test bars cast separately (though under identical conditions) from the actual casting, ensuring a standardized measure of the material's potential properties.
≈Heat Treatment Principles: The concept and application of heat treatment processes such as solution treatment, quenching, and aging (natural or artificial) to enhance mechanical properties are recognized and specified in all the standards.
≈Fundamental Inspection Requirements: Basic quality assurance requirements, including visual inspection for casting defects, dimensional verification, and the methodology for conducting tensile tests, are conceptually aligned across IS 2109 and its international counterparts.