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IS 1948:2006 is the Indian Standard (BIS) for aluminium and aluminium alloy ingots for remelting for general engineering purposes - specification. 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.
Overview
Status
Current
Usage level
Specialized
Domain
Materials Science — Aluminium and Non-Ferrous Metals
Standard Specification for Aluminum Alloys in Ingot and Molten Form for Castings from All Casting Processes
Specifies chemical composition, quality, and marking for aluminum alloy ingots intended for casting.
EN 1676:2020CEN (European Committee for Standardization), Europe
HighCurrent
Aluminium and aluminium alloys - Alloyed ingots for remelting - Specifications
Defines specifications for alloyed aluminium ingots intended for remelting to produce castings.
EN 576:2003CEN (European Committee for Standardization), Europe
HighCurrent
Aluminium and aluminium alloys - Unalloyed aluminium ingots for remelting - Specifications
Covers the classification and composition of unalloyed aluminium ingots for remelting.
ISO 115:2003ISO (International Organization for Standardization), International
MediumCurrent
Unalloyed aluminium ingots for remelting — Classification and composition
Specifies classification and composition for unalloyed aluminium ingots, a subset of IS 1948's scope.
Key Differences
≠Alloy designation systems are entirely different. IS 1948 uses designations like 'Grade 4600' or 'IS A5', while EN uses numerical systems (e.g., EN AB-46000) and ASTM uses UNS numbers (e.g., A03800).
≠IS 1948 specifies a mandatory color coding scheme for ingot identification in Table 2. While international standards require identification, they do not standardize a single color code system across all alloys; EN 1676 provides its own system, and ASTM allows for various methods.
≠While many alloys are chemically similar, specific limits for major elements and impurities can differ. For instance, the maximum permissible iron (Fe) content in equivalent alloys often varies slightly between standards, affecting final casting properties.
≠IS 1948 covers both unalloyed and alloyed ingots within a single specification. European standards segregate these into two distinct documents: EN 576 for unalloyed and EN 1676 for alloyed ingots.
Key Similarities
≈The fundamental purpose of all standards is to specify the chemical composition and quality requirements for aluminium and its alloy ingots intended for remelting to produce castings.
≈All standards use chemical composition as the primary criterion for classifying and grading different types of ingots.
≈All standards include mandatory requirements for marking and lot traceability, ensuring that each batch of ingots can be identified by its grade and production lot/heat.
≈The general requirements for the physical condition of the ingots are similar, specifying that they should be reasonably free from dross, slag, and non-metallic inclusions.
Parameter Comparison
Parameter
IS Value
International
Source
Alloy Designation (Al-Si-Cu Die Casting)
Grade 4600
EN AB-46100
EN 1676:2020
Silicon (Si) Content for Grade 4600 / equivalent
9.5 - 12.0%
10.5 - 12.5% (for EN AB-46100)
EN 1676:2020
Copper (Cu) Content for Grade 4600 / equivalent
1.5 - 3.5%
2.0 - 3.0% (for A383.0, a close match)
ASTM B179-22
Iron (Fe) Content for Grade 4600 / equivalent
1.3% max
1.1% max (for EN AB-46100)
EN 1676:2020
Aluminium (Al) Purity for 99.5% Grade
99.50% min (for Grade 99.50)
99.50% min (for EN AB-1050A)
EN 576:2003
Silicon (Si) Impurity in 99.5% Grade
0.30% max (for Grade 99.50)
0.25% max (for EN AB-1050A)
EN 576:2003
Ingot Color Code (for Grade 4600)
Red and Green
Red and Yellow (for EN AB-46100)
EN 1676:2020
⚠ Verify details from original standards before use
Key Values4
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 %
Tables & Referenced Sections
Key Tables
Table 1 - Chemical Composition of Aluminium and Aluminium Alloy Ingots for Remelting