What is the designation for commercially pure aluminium ingot for remelting?

Designation 19500, which requires a minimum of 99.50% Aluminium. (Table 1)

What is the common Al-Si eutectic alloy designation and its silicon content?

Designation 46000, corresponding to LM6, requires a silicon content between 10.0% and 13.0%. (Table 1)

How should ingots be marked?

Each ingot or bundle must be marked with the material designation, cast/lot number, and the manufacturer's identification mark. (Clause 8)

What standard is used for chemical analysis if there's a dispute?

The relevant parts of IS 504 'Methods for chemical analysis of aluminium and its alloys' should be used. (Clause 11.2)

IS 1948

: 2006

Aluminium and Aluminium Alloy Ingots for Remelting for General Engineering Purposes - Specification

CurrentSpecializedSpecificationMaterials Science · Aluminium and Non-Ferrous Metals

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This standard specifies the requirements for various grades of aluminium and aluminium alloy ingots intended for remelting. It covers the designation system, chemical composition, and marking for ingots used to produce castings for general engineering purposes.

Specifies the requirements for aluminium and aluminium alloy ingots for remelting for general engineering purposes.

Quick Reference Values

Min Aluminium % for 19500 (Pure Al)99.50 %

Silicon range for 46000 (Al-Si)10.0-13.0 %

Copper range for 24345 (Al-Cu)4.0-5.0 %

Magnesium range for 51300 (Al-Mg)3.0-6.0 %

Practical Notes

The 5-digit designation system is key; for example, the first digit '4' in '46000' indicates an Al-Si alloy.

Always verify the supplier's test certificate against the chemical composition limits in Table 1 for the specified alloy designation.

Visually inspect ingots for excessive dross, surface defects, and non-metallic inclusions before use, as per Clause 5.