IS 617 specifies primary aluminium and aluminium alloy ingots used as raw material for foundry remelting. It defines multiple purity grades from 99.0% to 99.9%+ aluminium content.
Specification for primary aluminium and aluminium alloy ingots for remelting, covering grades, chemical composition, and marking requirements.
Key Values
Grade 1A purityMin 99.9% Al
Grade 1B purityMin 99.5% Al
Grade 2 purityMin 99.0% Al
Practical Notes
! Grade 1B (99.5% Al) is the most commonly traded primary aluminium grade in India.
! Always verify chemical analysis certificate against IS 617 requirements before accepting ingot deliveries.
! Iron and silicon are the main impurities — higher purity grades have stricter limits on these elements.