SINCE 2012 · ISO CERTIFIED · 70,000 TONS/YEAR

Large Diameter
Aluminum Bar

Premium large-diameter aluminum solid bars manufactured to AMS, ASTM & EN standards. Engineered for aerospace, military, heavy-duty machining, and high-performance industrial applications--with custom alloys, dimensions, and certifications available.

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70K+
Tons Annual Capacity
24H
Quote Response
ISO
9001 / 14001 / 45001
Large Diameter Aluminum Bar
ISO 9001 / 14001 / 45001
AMS · ASTM · EN Standards
SGS / BV / TUV Reports Available
12 Extrusion Lines · 5 Forging Lines
Quote Within 24 Hours
Product Overview

What Is a Large Diameter Aluminum Bar?

Large diameter aluminum bars are solid, round or rectangular aluminum extrusion or forging billets produced in diameters typically exceeding 100 mm--up to 1,000 mm and beyond. They serve as the primary raw material for CNC machining centers producing precision structural components, flanges, pistons, and high-stress aerospace parts.

At Southwest Aluminium, our large diameter aluminum bars are manufactured using both extrusion (500-8,000-ton presses) and forging (630-10,000-ton lines), delivering exceptional mechanical properties, tight dimensional tolerances, and homogeneous grain structure throughout the cross-section.

Every bar is traceable from melt to delivery, with full material test reports (MTRs), chemical analysis, and mechanical test certificates provided as standard.

Ø100-1000mm
Diameter Range
6m Max
Standard Bar Length
2xxx-7xxx
Alloy Series
T6 / T651
Common Tempers
Technical Specifications

Dimensions, Alloys & Standards

Flexible specifications to match your machining requirements. Custom dimensions, alloys, and tempers available on request.

Dimensions

  • Outer DiameterØ100 - 1,000 mm
  • LengthUp to 6,000 mm
  • Flat Bar Width100 - 800 mm
  • Thickness20 - 300 mm
  • TolerancePer AMS / ASTM / EN

Alloys & Tempers

  • 2024T3 / T351 / T4
  • 6061T6 / T651 / T6511
  • 6082T6 / T651
  • 7075T6 / T651 / T7351
  • 7050 / 7068T7451 / T73511

Standards & Certifications

  • Material StandardsAMS / ASTM / EN
  • Quality SystemISO 9001
  • EnvironmentISO 14001
  • SafetyISO 45001
  • 3rd-Party ReportsSGS / BV / TUV

Available Surface Treatments & Value-Added Services

Mill Finish (As-Extruded)
Anodizing (Type II / III)
Precision Sawing & Cutting
Peeled / Turned Surface
Ultrasonic Testing (UT)
Chemical Milling
Custom Length & Packaging
MTR & CoC Included
Industries & Applications

Where Large Diameter Aluminum Bars Are Used

Trusted by distributors and machining factories across the Middle East, EU, Australia, and beyond.

Aerospace & Defense

High-strength 7075 and 2024 bars for aircraft structural frames, wing spars, bulkheads, and military-grade components requiring superior strength-to-weight ratios.

CNC Machining & Precision Parts

6061-T651 and 7075-T651 bars are the go-to raw material for machining centers producing flanges, pistons, shafts, molds, jigs, and fixture plates.

Automotive & EV

Lightweight aluminum bars for suspension components, drive shafts, brake calipers, and EV battery housing structures demanding tight tolerances and consistent mechanical properties.

Industrial Machinery

Heavy-duty bars for hydraulic cylinders, pump bodies, valve blocks, and large industrial equipment requiring excellent machinability and corrosion resistance.

Oil & Gas / Marine

Corrosion-resistant 6082 and 5083 bars for offshore platform components, subsea equipment, marine hardware, and petrochemical processing applications.

Semiconductor & Electronics

Ultra-flat 6061 and 6082 bars for semiconductor equipment frames, vacuum chambers, heat sinks, and precision electronic enclosures requiring excellent surface finish after machining.

Why Southwest Aluminium

Your Reliable Large Diameter Aluminum Bar Supplier

From raw billet to certified bar, we control every step of the process to ensure quality, consistency, and on-time delivery.

Manufacturing Strength

12 Extrusion Lines (500-8,000 tons)

Capable of producing bars from small-diameter profiles to massive structural billets with consistent grain structure.

5 Forging Lines (630-10,000 tons)

Open-die and closed-die forging for ultra-large diameter bars with superior mechanical properties over cast alternatives.

70,000 Tons Annual Capacity

Scale to meet large-volume distributor orders and long-term supply agreements without compromising lead times.

CNC Machining Centers On-Site

In-house turning, milling, and sawing for value-added processing before shipment.

Rigorous Quality Control

Chemical composition analysis, tensile/hardness testing, dimensional inspection, and UT/ET testing. Full MTR provided for every batch.

24-Hour Quote Turnaround

Submit your drawing or specification and receive a detailed quotation within 24 hours. Pre-sales technical support included at no charge.

Custom Alloy & Dimension Solutions

Non-standard dimensions, special alloy tempers, or proprietary specifications? Our engineering team collaborates with you from design to delivery.

Stable Global Supply Chain

Serving distributors and machining factories in the Middle East, EU, Australia, and Southeast Asia with reliable lead times and flexible MOQ.

Frequently Asked Questions

Common Questions About Large Diameter Aluminum Bars

What is the maximum diameter you can produce for aluminum bars?
Using our forging lines (up to 10,000 tons), we can produce aluminum bars and billets up to Ø1,000 mm in diameter. Extruded bars are available up to Ø600 mm depending on alloy and press capacity. Contact us with your specific requirements for a feasibility assessment.
What alloys are most commonly ordered for large diameter aluminum bars?
The most popular alloys are 6061-T651 (general machining, excellent machinability and corrosion resistance), 7075-T651 (aerospace and high-stress applications, highest strength), and 2024-T351 (fatigue resistance, aerospace). We also supply 6082, 5083, 7050, and 7068 depending on application requirements.
Do you provide material test reports (MTR) and third-party certifications?
Yes. Every order ships with a full material test report (MTR) covering chemical composition and mechanical properties. Third-party inspection reports from SGS, BV, or TUV are available upon request. We are ISO 9001, ISO 14001, and ISO 45001 certified.
What is the difference between extruded and forged aluminum bars?
Extruded bars are produced by forcing aluminum through a die, offering excellent dimensional consistency and surface finish, ideal for diameters up to ~600 mm. Forged bars are shaped under high compressive force, producing a refined, directional grain structure with superior fatigue strength and toughness--preferred for aerospace, military, and heavy-duty machining where structural integrity is critical.
What is your minimum order quantity (MOQ) and typical lead time?
MOQ varies by alloy, diameter, and temper--typically 500 kg to 2 tons for standard items. Lead times range from 15 to 45 days depending on specification and volume. We offer flexible MOQ for long-term partnership customers. Contact us for a customized quote and delivery schedule.
Can you supply custom lengths and perform value-added processing?
Yes. We offer precision sawing to custom lengths, surface turning/peeling for improved finish, anodizing, and ultrasonic testing. Our in-house CNC machining centers can perform additional processing before shipment, reducing your lead time and handling costs.

Ready to Get Started with Large Diameter Aluminum Bar?

Southwest Aluminium (Kunshan) Co., Ltd · ISO Certified · Since 2012

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