Aluminum & Aluminum Alloys•Wrought Aluminum Alloys•

VERIFIED(Source-Verified)

6061 Aluminum

Primary Designation:AA 6061

Aliases:

AA 6061Al 6061

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:11 composition elements and 35 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

2.7 g/cm³TYPICAL · temperature not stated

Electrical Conductivity

47 % IACSTYPICAL · O Temper · temperature not stated

Thermal Conductivity

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

Melting Range (Solidus / Liquidus)

582 – 652 °C582 – 652 °F

Solidus: 582°C | Liquidus: 652°C

Composition Excerpt

Si 0.4–0.8 wt%Silicon (range)

Standard Elemental Basis: RANGE

Tensile Strength

124 MPaTYPICAL · O Temper · temperature not stated

Reported: 124

Engineering Summary

6061 is the premier general-purpose structural precipitation-hardening aluminum alloy (Al-Mg-Si-Cu). It combines high strength, excellent corrosion resistance, superior weldability, and exceptional anodizing responsiveness across plate, bar, and extrusions.

Recognized Aliases

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

AA 6061Al 6061

6061 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	6061	Aluminum Association	—Ref: Kaiser Aluminum Technical Engineering Datasheet
UNS	A96061	Unified Numbering System	—Ref: Kaiser Aluminum Technical Engineering Datasheet
ISO	AlMg1SiCu	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 6061	Commercial Alias	Colloquial or commercial industry synonym
Al 6061	Commercial Alias	Colloquial or commercial industry synonym

Applicable Specifications & Product Form ReferencesSPECIFICATION REFERENCE

3 Applicable Standards

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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
ASTM International	ASTM B221	Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and TubesPRODUCT_SPECIFICATION · Product form: Extrusions	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.

6061 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	RANGE	0.40 – 0.80	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Iron	Fe	MAXIMUM	≤ 0.70	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Copper	Cu	RANGE	0.15 – 0.40	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Manganese	Mn	MAXIMUM	≤ 0.15	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Magnesium	Mg	RANGE	0.80 – 1.20	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Chromium	Cr	RANGE	0.04 – 0.35	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:

6061 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	2.7 g/cm³	TYPICAL		2.7 g/cm³	Kaiser Aluminum Corporation	VERIFIED

6061 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.

6 Parameters

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Property Parameter	Canonical SI Value	Semantic Basis	Source Raw Reference	Source Reference	Status
Coefficient of Thermal Expansion	23.6 µm/(m·K)	TYPICAL	23.6 µm/(m·K)	Kaiser Aluminum Corporation	VERIFIED
Solidus Temperature	582 °C	TYPICAL	582 °C	Kaiser Aluminum Corporation	VERIFIED
Liquidus Temperature	652 °C	TYPICAL	652 °C	Kaiser Aluminum Corporation	VERIFIED
Thermal ConductivityCondition: O Temper	180 W/(m·K)	TYPICAL	180 W/(m·K)	Kaiser Aluminum Corporation	VERIFIED
Thermal ConductivityCondition: T4 Temper	154 W/(m·K)	TYPICAL	154 W/(m·K)	Kaiser Aluminum Corporation	VERIFIED
Thermal ConductivityCondition: T6 Temper	167 W/(m·K)	TYPICAL	167 W/(m·K)	Kaiser Aluminum Corporation	VERIFIED

6061 Aluminum Electrical Properties

Electrical conductivity and resistivity in their reported units and conditions.

3 Parameters

Scroll horizontally for full property parameters

Property Parameter	Canonical SI Value	Semantic Basis	Source Raw Reference	Source Reference	Status
Electrical ConductivityCondition: O Temper	47 % IACS	TYPICAL	47.0 % IACS	Kaiser Aluminum Corporation	VERIFIED
Electrical ConductivityCondition: T4 Temper	40 % IACS	TYPICAL	40.0 % IACS	Kaiser Aluminum Corporation	VERIFIED
Electrical ConductivityCondition: T6 Temper	43 % IACS	TYPICAL	43.0 % IACS	Kaiser Aluminum Corporation	VERIFIED

6061 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

69 GPa

Product Form:

Temper / Condition:

Showing 4 of 4 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	O Temper Source values and qualifiers Ultimate Tensile Strength: 124 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties O Cold Finished Rod & Bar Yield Strength (0.2% Offset): 55 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties O Cold Finished Rod & Bar Elongation (4D): 25 % (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties O Cold Finished Rod & Bar Shear Strength: 83 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties O Cold Finished Rod & Bar Fatigue Endurance Limit (5x10^8 cycles): 62 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties O Cold Finished Rod & Bar HB Hardness: 30 HB (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Hardness O Cold Finished Rod & Bar O	—	124 MPa	55 MPa	25 %	83 MPa	62 MPa	30 HB	VERIFIED
Cold Finished Rod & Bar	T4, T451 Temper Source values and qualifiers Ultimate Tensile Strength: 241 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties T451 Cold Finished Rod & Bar Yield Strength (0.2% Offset): 145 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties T451 Cold Finished Rod & Bar Elongation (4D): 22 % (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties T451 Cold Finished Rod & Bar Shear Strength: 165 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties T451 Cold Finished Rod & Bar Fatigue Endurance Limit (5x10^8 cycles): 97 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties T451 Cold Finished Rod & Bar HB Hardness: 65 HB (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Hardness T451 Cold Finished Rod & Bar T451	—	241 MPa	145 MPa	22 %	165 MPa	97 MPa	65 HB	VERIFIED
Cold Finished Rod & Bar	T6, T651 Temper Source values and qualifiers Ultimate Tensile Strength: 310 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties T651 Cold Finished Rod & Bar Yield Strength (0.2% Offset): 276 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties T651 Cold Finished Rod & Bar Elongation (4D): 12 % (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties T651 Cold Finished Rod & Bar Shear Strength: 207 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties T651 Cold Finished Rod & Bar Fatigue Endurance Limit (5x10^8 cycles): 97 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties T651 Cold Finished Rod & Bar HB Hardness: 95 HB (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Hardness T651 Cold Finished Rod & Bar T651	—	310 MPa	276 MPa	12 %	207 MPa	97 MPa	95 HB	VERIFIED
Extrusions	T6511 Temper Source values and qualifiers Ultimate Tensile Strength: 310 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties T6511 Extrusions Yield Strength (0.2% Offset): 276 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties T6511 Extrusions Elongation (4D): 12 % (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties T6511 Extrusions Shear Strength: 207 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties T6511 Extrusions Fatigue Endurance Limit (5x10^8 cycles): 97 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Mechanical Properties T6511 Extrusions HB Hardness: 95 HB (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-6061 Hardness T6511 Extrusions T6511	—	310 MPa	276 MPa	12 %	207 MPa	97 MPa	95 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

For 6061 Aluminum, a qualified cutting-speed or tool-life recommendation is not supplied in the available record. A relevant hardness example is HB Hardness: 30 HB (typical; O Temper, O, Cold Finished Rod & Bar). Use that supplied condition for a trial of the difficult feature. Record tool changes, burr removal, unclamped dimensions and accepted parts per hour. Relative machinability ratings from different reference scales should not be compared as if they were one common test.

Weldability, brazing & joining

No qualified weld procedure, filler selection or preheat/interpass schedule is established by this material record. Obtain a procedure for the actual joint, supplied condition and section rather than copying one from a nearby grade. The first cataloged strength example is Ultimate Tensile Strength: 124 MPa (typical; O Temper, O, Cold Finished Rod & Bar). Assess the final part after joining or thermal processing. Include distortion, cleanup and inspection in the quotation. A material designation or favorable process rating is a starting point for qualification, not evidence that an untested joint meets the drawing.

Corrosion & service environment

Review the finish, moisture traps and contact with other metals before accepting an assembly for service. Alloy, temper and surface treatment answer different questions. A stronger listed condition does not automatically solve corrosion, wear or deflection, and thermal-property data is not a maximum operating-temperature rating. The recorded thermal example is Coefficient of Thermal Expansion: 23.6 µm/(m·K) (typical; additional condition not stated). State the exposure and inspection access in the design record so that a change of installation or cleaning method triggers a review. The selected composition entries are Si 0.4–0.8 wt%, Fe maximum 0.7 wt%, Cu 0.15–0.4 wt%. Chemistry documents identity; it does not establish fluid compatibility.

Selection trade-offs & applications

For a welded frame, assess the final assembly condition instead of assigning the incoming T6 stock properties to the heat-affected zone. For a machined fixture, decide whether yielding or elastic deflection actually controls the design. The listed forms include Cold Finished Rod & Bar, Extrusions; confirm the actual stock offered by the supplier. Compare the complete route through machining, joining, finish and inspection. Keep the certificate, required test location and acceptance criteria with the first-article record. A later change of grade, condition or source should be assessed against that same requirement.

Technical references: Kaiser Aluminum Corporation

6xxx Series Wrought Aluminum Alloys

Wrought aluminum alloys grouped under the 6xxx metallurgical series sharing fundamental alloying systems and physical characteristics.

9 Adjacent Grades

6005A

6026

6060

6061Current Grade

6061 Aluminum

6063

6082

6101

6106

6262

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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.

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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-6061 Chemical Composition Limits. Selected facts only; no decorative text or full standard tables reproduced.