Aluminum & Aluminum Alloys•Wrought Aluminum Alloys•

VERIFIED(Source-Verified)

2011 Aluminum

Primary Designation:AA 2011

Aliases:

AA 2011Alloy 2011

Mat Grades internal verification confirms source-backed fidelity and data integrity. It does not constitute external certification or guaranteed lot conformity. Read engineering disclaimer →

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Data Completeness:9 composition elements and 21 condition-specific property values cataloged.

Omitted fields represent unverified properties. "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

2.82 g/cm³TYPICAL · temperature not stated

Electrical Conductivity

39 % IACSTYPICAL · T3 Temper · temperature not stated

Thermal Conductivity

151 W/(m·K)TYPICAL · T3 Temper · temperature not stated

Melting Range (Solidus / Liquidus)

535 – 641 °C535 – 641 °F

Solidus: 535°C | Liquidus: 641°C

Composition Excerpt

Si ≤ 0.4 wt%Silicon (max)

Standard Elemental Basis: MAX

Tensile Strength

379 MPaTYPICAL · T3 Temper · temperature not stated

Reported: 379

Engineering Summary

2011 is a free-machining Al-Cu alloy engineered for high-speed automatic screw machine operations. Bismuth and lead (or alternative chip breakers) produce fine, broken chips and high surface finish, with mechanical strength comparable to mild steel.

Recognized Aliases

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

AA 2011Alloy 2011

2011 Aluminum Specifications & Designations

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

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System	Identifier	Standard System Name	Classification Notes & Provenance
AAPRIMARY	2011	Aluminum Association	—Ref: Kaiser Aluminum Technical Engineering Datasheet
UNS	A92011	Unified Numbering System	—Ref: Kaiser Aluminum Technical Engineering Datasheet
ISO	AlCu6BiPb	International Organization for Standardization	—Ref: Kaiser Aluminum Technical Engineering Datasheet

Recognized Commercial Aliases & Trade NamesCOMMON ALIAS

2 Listed

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Recognized Name / Alias	Classification	Technical Usage & Context
AA 2011	Commercial Alias	Colloquial or commercial industry synonym
Alloy 2011	Commercial Alias	Colloquial or commercial industry synonym

Applicable Specifications & Product Form ReferencesSPECIFICATION REFERENCE

1 Applicable Standards

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Standards Body	Specification Code	Specification Title / Scope	Relationship Type
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.

2011 Aluminum Chemical Composition

Chemical Composition (Weight %) — Elemental limits and values from the cited source. Preserves exact semantic limits (minimums, maximums, and ranges).

Scroll horizontally for full elemental limits

Element	Symbol	Semantic Basis	Specified Value	Unit	Metallurgical Notes & Qualification	Data Status
Silicon	Si	MAXIMUM	≤ 0.40	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Iron	Fe	MAXIMUM	≤ 0.70	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Copper	Cu	RANGE	5.00 – 6.00	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Lead	Pb	RANGE	0.20 – 0.60	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Bismuth	Bi	RANGE	0.20 – 0.60	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Zinc	Zn	MAXIMUM	≤ 0.30	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:

2011 Aluminum Physical Properties

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

1 Parameters

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Property Parameter	Canonical SI Value	Semantic Basis	Test Temperature / Context Range	Source Raw Reference	Source Reference	Status
Density	2.82 g/cm³	TYPICAL		2.82 g/cm³	Kaiser Aluminum Corporation	VERIFIED

2011 Aluminum Thermal & Thermodynamic Properties

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

5 Parameters

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Property Parameter	Canonical SI Value	Semantic Basis	Source Raw Reference	Source Reference	Status
Coefficient of Thermal Expansion	22.9 µm/(m·K)	TYPICAL	22.9 µm/(m·K)	Kaiser Aluminum Corporation	VERIFIED
Solidus Temperature	535 °C	TYPICAL	535 °C	Kaiser Aluminum Corporation	VERIFIED
Liquidus Temperature	641 °C	TYPICAL	641 °C	Kaiser Aluminum Corporation	VERIFIED
Thermal ConductivityCondition: T3 Temper	151 W/(m·K)	TYPICAL	151 W/(m·K)	Kaiser Aluminum Corporation	VERIFIED
Thermal ConductivityCondition: T8 Temper	172 W/(m·K)	TYPICAL	172 W/(m·K)	Kaiser Aluminum Corporation	VERIFIED

2011 Aluminum Electrical Properties

Electrical conductivity and resistivity in their reported units and conditions.

2 Parameters

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Property Parameter	Canonical SI Value	Semantic Basis	Test Temperature / Context Range	Source Raw Reference	Source Reference	Status
Electrical ConductivityCondition: T3 Temper	39 % IACS	TYPICAL		39.0 % IACS	Kaiser Aluminum Corporation	VERIFIED
Electrical ConductivityCondition: T8 Temper	45 % IACS	TYPICAL		45.0 % IACS	Kaiser Aluminum Corporation	VERIFIED

2011 Aluminum Mechanical Properties

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

70 GPa

Temper / Condition:

Showing 2 of 2 conditions

Scroll horizontally for all conditions & tempers

Product Form	Temper / Condition	Section Size	Tensile (UTS)	Yield Strength	Elongation	Shear Strength	Fatigue Strength	Hardness (Scales Preserved)	Status
Cold Finished Rod & Bar	T3 Temper Source values and qualifiers Ultimate Tensile Strength: 379 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2011 Mechanical Properties T3 Cold Finished Rod & Bar Yield Strength (0.2% Offset): 296 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2011 Mechanical Properties T3 Cold Finished Rod & Bar Elongation (4D): 15 % (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2011 Mechanical Properties T3 Cold Finished Rod & Bar Shear Strength: 221 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2011 Mechanical Properties T3 Cold Finished Rod & Bar Fatigue Endurance Limit (5x10^8 cycles): 124 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2011 Mechanical Properties T3 Cold Finished Rod & Bar HB Hardness: 95 HB (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2011 Hardness T3 Cold Finished Rod & Bar T3	—	379 MPa	296 MPa	15 %	221 MPa	124 MPa	95 HB	VERIFIED
Cold Finished Rod & Bar	T8 Temper Source values and qualifiers Ultimate Tensile Strength: 407 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2011 Mechanical Properties T8 Cold Finished Rod & Bar Yield Strength (0.2% Offset): 310 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2011 Mechanical Properties T8 Cold Finished Rod & Bar Elongation (4D): 12 % (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2011 Mechanical Properties T8 Cold Finished Rod & Bar Shear Strength: 241 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2011 Mechanical Properties T8 Cold Finished Rod & Bar Fatigue Endurance Limit (5x10^8 cycles): 124 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2011 Mechanical Properties T8 Cold Finished Rod & Bar HB Hardness: 100 HB (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-2011 Hardness T8 Cold Finished Rod & Bar T8	—	407 MPa	310 MPa	12 %	241 MPa	124 MPa	100 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

Practical Engineering & Fabrication Notes

By Mat Grades Editorial Desk · Updated 2026-11-14. Use alongside the specified product standard and supplier certificate.

Machining & shop-floor behavior

2011 is a useful starting point for small turned components where machining time drives cost. Aalco describes good chip clearance at high cutting speeds and suitability for automatic lathes. For a production trial, record cycle time, chip packing, surface finish and tool changes together. A shorter cycle is not a saving if the finished part needs extra deburring or inspection. Confirm the supplied temper and bar size before comparing the result with another alloy; a generic aluminum strength value does not describe the actual stock.

Weldability, brazing & joining

Do not specify 2011 for an assembly that relies on routine fusion welding. Aalco rates welding and brazing poorly. A mechanically assembled part is a more appropriate design starting point. Define the joint before ordering the bar: thread engagement, access for assembly and inspection requirements may determine whether this grade is practical. A change from a turned component to a welded assembly is a reason to revisit the alloy selection rather than simply add a weld symbol to the drawing.

Corrosion & service environment

Aalco identifies limited corrosion resistance and notes that anodizing is commonly used for protection. Decide on the service environment and finish before setting the final dimensions. Include the coating requirement in the purchase and inspection documents. Do not treat a visually acceptable finish as evidence that a component is suitable for outdoor or chemical exposure. Request application-specific advice where the operating medium is uncertain.

Selection trade-offs & applications

Typical candidates include repetition-machined fittings, fasteners and trim components. Aalco identifies 6262-T9 as an alternative when corrosion performance needs more attention. That is a shortlist decision, not permission to substitute: compare the actual mechanical requirement, stock availability and finishing route. For a prototype-to-production decision, ask the machine shop to quote the complete process for both options, including material, machining, finish and rejection allowance. Keep the chosen temper on the drawing and retain the supplier certificate with the first-article inspection record.

Technical references: Aalco: 2011-T3 rod and bar

2xxx Series Wrought Aluminum Alloys

Wrought aluminum alloys grouped under the 2xxx metallurgical series sharing fundamental alloying systems and physical characteristics.

4 Adjacent Grades

2011Current Grade

2011 Aluminum

2014

2017

2024

Related Engineering & Metallurgy Guides

Contextual technical guides explaining degradation mechanisms, testing methodologies, and selection criteria relevant to 2011 Aluminum.

Welding & Fabrication18 min read

How to Weld Aluminium to Aluminium: TIG, MIG, Filler Metals & Alloy Guide

Aluminium possesses distinct physical and metallurgical properties—including a tenacious refractory oxide layer that melts at 2,072°C, thermal conductivity five times higher than structural steel, extreme liquid hydrogen solubility, and a lack of visible color change before melting. Successful aluminium-to-aluminium welding requires matching the base alloy series to an appropriate process (AC TIG, pulsed MIG, or SMAW) and compatible filler metal while designing for unavoidable heat-affected zone softening.

Author: Mat Grades Editorial DeskRead Guide →

Sources

Sources & Provenance Trail: Authoritative reference publications, standards specifications, and data 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-2011 Chemical Composition Limits. Selected facts only; no decorative text or full standard tables reproduced.