Aluminum Selection Guide

Choose an aluminum alloy around strength, process, and environment.

Compare alloy family, temper, strength, corrosion resistance, machinability, formability, weldability, conductivity, finishing, and product availability.

Buying Overview

Start with the complete application requirement.

Aluminum is used across transportation, aerospace, electronics, construction, packaging, machinery, and consumer products because it combines low density with useful strength, corrosion resistance, conductivity, and manufacturability. Alloy and temper selection determine how the material behaves during machining, forming, welding, heat treatment, anodizing, and service.

Comparison Criteria

Technical and supplier factors to review.

Use consistent criteria across suppliers and options so recommendations, quotes, and risks can be compared on the same basis.

Selection Factor

1xxx Series

High-purity aluminum with excellent conductivity, corrosion resistance, and formability.

Selection Factor

2xxx Series

Copper-alloyed grades offering high strength with more limited corrosion resistance and weldability.

Selection Factor

3xxx Series

Manganese-alloyed grades known for formability, corrosion resistance, and sheet applications.

Selection Factor

5xxx Series

Magnesium-alloyed grades with good strength, weldability, and marine corrosion resistance.

Selection Factor

6xxx Series

Magnesium-silicon alloys balancing strength, corrosion resistance, machining, welding, and extrusion.

Selection Factor

7xxx Series

Zinc-alloyed grades providing very high strength for aerospace and demanding structural use.

Selection Factor

Cast Alloys

Aluminum alloys formulated for fluidity, die casting, sand casting, and permanent-mold production.

Selection Factor

Temper and Condition

Annealed, strain-hardened, solution-treated, aged, and stress-relieved material conditions.

RFQ and Specification Details

Provide enough information for an accurate recommendation.

Mechanical Requirements

Define yield strength, tensile strength, fatigue, stiffness, hardness, impact, and service load.

Manufacturing Process

Identify machining, extrusion, casting, stamping, forming, welding, or additive production.

Environmental Exposure

Consider moisture, salt, chemicals, galvanic contact, temperature, and outdoor service.

Joining Method

Specify welding, brazing, riveting, fastening, adhesive bonding, or mechanical assembly.

Finish Requirements

Include anodizing, conversion coating, painting, polishing, texture, color, and appearance.

Product Form

Clarify sheet, plate, bar, tube, extrusion, forging, casting, wire, or custom profile.

Selection Workflow

A practical path from requirements to approval.

Define service requirements

Establish load, stiffness, fatigue, temperature, corrosion, conductivity, and weight targets.

Match alloy family to process

Choose grades suitable for machining, forming, casting, extrusion, welding, or forging.

Select the correct temper

Balance strength, ductility, residual stress, formability, and heat-treatment condition.

Review joining and finishing

Confirm weldability, fasteners, anodizing, coating, polishing, and galvanic compatibility.

Verify availability and certification

Check product form, thickness, minimum order, lead time, specifications, and traceability.

Continue through the Manufacturing Yield buying-guide library.

Use the main buying-guide hub, RFQ guide, supplier-selection guide, and manufacturing resources to compare options and suppliers more consistently.

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