Aluminum & Aluminum Alloys•Wrought Aluminum Alloys•

VERIFIED(Source-Verified)

7175 Aluminum

Primary Designation:AA 7175

Aliases:

AA 7175

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 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

2.8 g/cm³TYPICAL · temperature not stated

Electrical Conductivity

33 % IACSTYPICAL · T66 Temper · temperature not stated

Thermal Conductivity

130 W/(m·K)TYPICAL · T66 Temper · temperature not stated

Melting Range (Solidus / Liquidus)

532 – 635 °C532 – 635 °F

Solidus: 532°C | Liquidus: 635°C

Composition Excerpt

Si ≤ 0.15 wt%Silicon (max)

Standard Elemental Basis: MAX

Tensile Strength

572 MPaTYPICAL · T66 Temper · temperature not stated

Reported: 572

Engineering Summary

7175 is a premium high-purity aerospace variant of 7075 with restricted iron and silicon impurities. Engineered specifically for high-strength die and hand forgings, it provides superior short-transverse fracture toughness and stress-corrosion resistance in T736 and T74 tempers.

Recognized Aliases

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

AA 7175

7175 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	7175	Aluminum Association	—Ref: Kaiser Aluminum Technical Engineering Datasheet
UNS	A97175	Unified Numbering System	—Ref: Kaiser Aluminum Technical Engineering Datasheet
ISO	AlZn5.5MgCu(B)	International Organization for Standardization	—Ref: Kaiser Aluminum Technical Engineering Datasheet

Recognized Commercial Aliases & Trade NamesCOMMON ALIAS

1 Listed

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Recognized Name / Alias	Classification	Technical Usage & Context
AA 7175	Commercial Alias	Colloquial or commercial industry synonym

Applicable Specifications & Product Form ReferencesSPECIFICATION REFERENCE

2 Applicable Standards

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Standards Body	Specification Code	Specification Title / Scope	Relationship Type
SAE International	AMS 4149	Aluminum Alloy Forgings 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr (7175-T736)PRODUCT_SPECIFICATION · Product form: Forgings	Specification Reference
ASTM International	ASTM B247	Standard Specification for Aluminum and Aluminum-Alloy Die Forgings, Hand Forgings, and Rolled Ring ForgingsPRODUCT_SPECIFICATION · Product form: Forgings	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.

7175 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	≤ 0.15	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Iron	Fe	MAXIMUM	≤ 0.20	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Copper	Cu	RANGE	1.20 – 2.00	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Manganese	Mn	MAXIMUM	≤ 0.10	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Magnesium	Mg	RANGE	2.10 – 2.90	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Chromium	Cr	RANGE	0.18 – 0.28	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Zinc	Zn	RANGE	5.10 – 6.10	wt%	Ref: Kaiser Aluminum Corporation	VERIFIED
Titanium	Ti	MAXIMUM	≤ 0.10	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:

7175 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	2.8 g/cm³	TYPICAL		2.8 g/cm³	Kaiser Aluminum Corporation	VERIFIED

7175 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	23.4 µm/(m·K)	TYPICAL	23.4 µm/(m·K)	Kaiser Aluminum Corporation	VERIFIED
Solidus Temperature	532 °C	TYPICAL	532 °C	Kaiser Aluminum Corporation	VERIFIED
Liquidus Temperature	635 °C	TYPICAL	635 °C	Kaiser Aluminum Corporation	VERIFIED
Thermal ConductivityCondition: T66 Temper	130 W/(m·K)	TYPICAL	130 W/(m·K)	Kaiser Aluminum Corporation	VERIFIED
Thermal ConductivityCondition: T736 Temper	155 W/(m·K)	TYPICAL	155 W/(m·K)	Kaiser Aluminum Corporation	VERIFIED

7175 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: T66 Temper	33 % IACS	TYPICAL		33.0 % IACS	Kaiser Aluminum Corporation	VERIFIED
Electrical ConductivityCondition: T736 Temper	40 % IACS	TYPICAL		40.0 % IACS	Kaiser Aluminum Corporation	VERIFIED

7175 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

71 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
Forgings	T66 Temper Source values and qualifiers Ultimate Tensile Strength: 572 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-7175 Mechanical Properties T66 Forgings Yield Strength (0.2% Offset): 510 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-7175 Mechanical Properties T66 Forgings Elongation (4D): 11 % (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-7175 Mechanical Properties T66 Forgings Shear Strength: 331 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-7175 Mechanical Properties T66 Forgings Fatigue Endurance Limit (5x10^8 cycles): 159 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-7175 Mechanical Properties T66 Forgings HB Hardness: 150 HB (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-7175 Hardness T66 Forgings T66	—	572 MPa	510 MPa	11 %	331 MPa	159 MPa	150 HB	VERIFIED
Forgings	T736 Temper Source values and qualifiers Ultimate Tensile Strength: 517 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-7175 Mechanical Properties T736 Forgings Yield Strength (0.2% Offset): 448 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-7175 Mechanical Properties T736 Forgings Elongation (4D): 12 % (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-7175 Mechanical Properties T736 Forgings Shear Strength: 296 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-7175 Mechanical Properties T736 Forgings Fatigue Endurance Limit (5x10^8 cycles): 159 MPa (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-7175 Mechanical Properties T736 Forgings HB Hardness: 135 HB (TYPICAL)Kaiser Aluminum Corporation — mat-phase4c-7175 Hardness T736 Forgings T736	—	517 MPa	448 MPa	12 %	296 MPa	159 MPa	135 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 7175 Aluminum, a qualified cutting-speed or tool-life recommendation is not supplied in the available record. A relevant hardness example is HB Hardness: 150 HB (typical; T66 Temper, T66, Forgings). 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: 572 MPa (typical; T66 Temper, T66, Forgings). 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: 23.4 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 maximum 0.15 wt%, Fe maximum 0.2 wt%, Cu 1.2–2 wt%. Chemistry documents identity; it does not establish fluid compatibility.

Selection trade-offs & applications

Use AA 7175, UNS A97175, ISO AlZn5.5MgCu(B) to identify the candidate, then specify the product form and delivered condition separately. A specific component application is not asserted where the source record does not provide one. The listed forms include Forgings; 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

7xxx Series Wrought Aluminum Alloys

Wrought aluminum alloys grouped under the 7xxx metallurgical series sharing fundamental alloying systems and physical characteristics.

4 Adjacent Grades

7050

7075

7175Current Grade

7175 Aluminum

7475

7475 Aluminum

View Grade →

Related Engineering & Metallurgy Guides

Contextual technical guides explaining degradation mechanisms, testing methodologies, and selection criteria relevant to 7175 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-7175 Chemical Composition Limits. Selected facts only; no decorative text or full standard tables reproduced.