Aluminum & Aluminum Alloys•Wrought Aluminum Alloys•

VERIFIED(CDA Source-Verified)

2024 Aluminum

Primary Designation:AA 2024

Aliases:

AA 2024

Mat Grades internal verification confirms source-backed fidelity and data integrity. It does not constitute external certification, ASTM/CDA endorsement, or guaranteed material conformity for procurement.

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Data Completeness & Record Integrity:11 composition elements and 29 contextual property values cataloged.

Omitted fields represent unverified parameters. "Missing is better than invented."

Key Engineering Properties

Representative source rows, qualified by their reported conditions. Inspect the tables below for all values, limits, and source notes.

Density

2.77 g/cm³TYPICAL · temperature not stated

Electrical Conductivity

50 % IACSTYPICAL · O Temper · temperature not stated

Thermal Conductivity

190 W/(m·K)TYPICAL · O Temper · temperature not stated

Melting Range (Solidus / Liquidus)

502 – 638 °C502 – 638 °F

Solidus: 502°C | Liquidus: 638°C

Composition Excerpt

Si ≤ 0.5 wt%Silicon (max)

Standard Elemental Basis: MAX

Engineering Summary

2024 is the benchmark high-strength aerospace Al-Cu-Mg alloy, offering exceptional damage tolerance, fracture toughness, and fatigue crack growth resistance for flight-critical airframe structures and precision fittings.

Recognized Aliases

Source-backed commercial trade name and short designations cataloged in canonical data.

AA 2024

Standard Designations & Applicable Specifications

Semantically classified designations distinguishing primary standard identifiers, commercial trade names, and applicable specification references.

Direct Standard DesignationsDIRECT DESIGNATION

3 Primary Identifiers

System	Identifier	Standard System Name	Classification Notes & Provenance
AAPRIMARY	2024	Aluminum Association	—Ref: Kaiser Aluminum Technical Engineering Datasheet
UNS	A92024	Unified Numbering System	—Ref: Kaiser Aluminum Technical Engineering Datasheet
ISO	AlCu4Mg1	International Organization for Standardization	—Ref: Kaiser Aluminum Technical Engineering Datasheet

Recognized Commercial Aliases & Trade NamesCOMMON ALIAS

1 Listed

Recognized Name / Alias	Classification	Technical Usage & Context
AA 2024	Commercial Alias	Colloquial or commercial industry synonym

Applicable Specifications & Product Form ReferencesSPECIFICATION REFERENCE

2 Applicable Standards

Standards Body	Specification Code	Specification Title / Scope	Relationship Type
ASTM International	ASTM B209	Standard Specification for Aluminum and Aluminum-Alloy Sheet and PlatePRODUCT_SPECIFICATION · Product form: Sheet & Plate	Specification Reference
ASTM International	ASTM B211	Standard Specification for Aluminum and Aluminum-Alloy Rolled or Cold Finished Bar, Rod, and WirePRODUCT_SPECIFICATION · Product form: Cold Finished Rod & Bar	Specification Reference

Engineering Notice: Applicable specifications establish manufacturing requirements, dimensional tolerances, and test criteria for specific product forms (e.g. bus bar, wire, plate, pipe). They represent applicable technical standards, not alternative or equivalent alloy grades.

Chemical Composition (Weight %)

Elemental limits and values from the cited source. Preserves exact semantic limits (minimums, maximums, and ranges).

Element	Symbol	Semantic Basis	Specified Value	Unit	Metallurgical Notes & Qualification	Data Status
Silicon	Si	MAXIMUM	≤ 0.50	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Iron	Fe	MAXIMUM	≤ 0.50	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Copper	Cu	RANGE	3.80 – 4.90	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Manganese	Mn	RANGE	0.30 – 0.90	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Magnesium	Mg	RANGE	1.20 – 1.80	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Chromium	Cr	MAXIMUM	≤ 0.10	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Zinc	Zn	MAXIMUM	≤ 0.25	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Titanium	Ti	MAXIMUM	≤ 0.15	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Other Elements Each	OE	EACH	≤ 0.05 each	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Other Elements Total	OT	TOTAL	≤ 0.15	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Aluminum	Al	REMAINDER	Remainder	wt%	Balance aluminumRef: Kaiser Aluminum Corporation	VERIFIED

* Elemental percentages are expressed in weight percent (wt%). Values represent applicable specification limits. Unspecified trace elements are not fabricated or assumed.Preserves exact semantic basis

Property Display UnitsSwitch between Canonical SI and Source / US Customary units:

Physical Properties

Source-specific physical properties. Test temperatures are shown only where reported.

1 Parameters

Property Parameter	Canonical SI Value	Semantic Basis	Test Temperature / Context Range	Source Raw Reference	Source Reference	Status
Density	2.77 g/cm³	TYPICAL		2.77 g/cm³	Kaiser Aluminum Corporation	VERIFIED

Thermal & Thermodynamic Properties

Phase change temperatures, thermal conductivity, specific heat, mean coefficients of thermal expansion across standardized temperature ranges, and recommended thermal processing windows.

6 Parameters

Property Parameter	Canonical SI Value	Semantic Basis	Source Raw Reference	Source Reference	Status
Coefficient of Thermal Expansion	23.2 µm/(m·K)	TYPICAL	23.2 µm/(m·K)	Kaiser Aluminum Corporation	VERIFIED
Solidus Temperature	502 °C	TYPICAL	502 °C	Kaiser Aluminum Corporation	VERIFIED
Liquidus Temperature	638 °C	TYPICAL	638 °C	Kaiser Aluminum Corporation	VERIFIED
Thermal ConductivityCondition: O Temper	190 W/(m·K)	TYPICAL	190 W/(m·K)	Kaiser Aluminum Corporation	VERIFIED
Thermal ConductivityCondition: T3 Temper	121 W/(m·K)	TYPICAL	121 W/(m·K)	Kaiser Aluminum Corporation	VERIFIED
Thermal ConductivityCondition: T851 Temper	151 W/(m·K)	TYPICAL	151 W/(m·K)	Kaiser Aluminum Corporation	VERIFIED

Electrical Properties

Electrical conductivity and resistivity in their reported units and conditions.

3 Parameters

Property Parameter	Canonical SI Value	Semantic Basis	Source Raw Reference	Source Reference	Status
Electrical ConductivityCondition: O Temper	50 % IACS	TYPICAL	50.0 % IACS	Kaiser Aluminum Corporation	VERIFIED
Electrical ConductivityCondition: T3 Temper	30 % IACS	TYPICAL	30.0 % IACS	Kaiser Aluminum Corporation	VERIFIED
Electrical ConductivityCondition: T851 Temper	38 % IACS	TYPICAL	38.0 % IACS	Kaiser Aluminum Corporation	VERIFIED

Contextual Mechanical Properties & Tempers

Engineering strength, ductility, and hardness values grouped by product form, temper, and section thickness. Mechanical properties are contextual and not isotropic averages.

Elastic & Baseline Mechanical ConstantsSource-specific measurement conditions

Modulus of Elasticity

73 GPa

Temper / Condition:

Showing 3 of 3 conditions

Product Form	Temper / Condition	Section Size	Tensile (UTS)	Yield Strength	Elongation	Shear Strength	Fatigue Strength	Hardness (Scales Preserved)	Status
Cold Finished Rod & Bar	O Temper Source values and qualifiers Ultimate Tensile Strength: 186 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Mechanical Properties O Cold Finished Rod & Bar Yield Strength (0.2% Offset): 76 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Mechanical Properties O Cold Finished Rod & Bar Elongation (4D): 20 % (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Mechanical Properties O Cold Finished Rod & Bar Shear Strength: 124 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Mechanical Properties O Cold Finished Rod & Bar Fatigue Endurance Limit (5x10^8 cycles): 90 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Mechanical Properties O Cold Finished Rod & Bar HB Hardness: 47 HB (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Hardness O Cold Finished Rod & Bar O	—	186 MPa	76 MPa	20 %	124 MPa	90 MPa	47 HB	VERIFIED
Cold Finished Rod & Bar	T3, T351 Temper Source values and qualifiers Ultimate Tensile Strength: 469 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Mechanical Properties T351 Cold Finished Rod & Bar Yield Strength (0.2% Offset): 324 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Mechanical Properties T351 Cold Finished Rod & Bar Elongation (4D): 19 % (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Mechanical Properties T351 Cold Finished Rod & Bar Shear Strength: 283 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Mechanical Properties T351 Cold Finished Rod & Bar Fatigue Endurance Limit (5x10^8 cycles): 138 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Mechanical Properties T351 Cold Finished Rod & Bar HB Hardness: 120 HB (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Hardness T351 Cold Finished Rod & Bar T351	—	469 MPa	324 MPa	19 %	283 MPa	138 MPa	120 HB	VERIFIED
Cold Finished Rod & Bar	T851 Temper Source values and qualifiers Ultimate Tensile Strength: 483 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Mechanical Properties T851 Cold Finished Rod & Bar Yield Strength (0.2% Offset): 448 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Mechanical Properties T851 Cold Finished Rod & Bar Elongation (4D): 9 % (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Mechanical Properties T851 Cold Finished Rod & Bar Shear Strength: 290 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Mechanical Properties T851 Cold Finished Rod & Bar Fatigue Endurance Limit (5x10^8 cycles): 124 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Mechanical Properties T851 Cold Finished Rod & Bar HB Hardness: 130 HB (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2024 Hardness T851 Cold Finished Rod & Bar T851	—	483 MPa	448 MPa	9 %	290 MPa	124 MPa	130 HB	VERIFIED

Hardness Integrity Notice: Rockwell B (HRB), Rockwell F (HRF), and Superficial 30T (HR30T) scales are reported on their measured scales without cross-scale mathematical conversion.

Source: See fact-level citations

Sources & Provenance Trail

Reference publications and standards organization registers cited across this material record.

Kaiser Aluminum CorporationKaiser Aluminum Technical Engineering Datasheet

PRIMARY PRODUCER

Reviewed factual transcription from Kaiser Aluminum technical product datasheets: mat-phase4c-2024 Chemical Composition Limits. Selected facts only; no decorative text or full standard tables reproduced.