6061 Marine Grade Aluminum Bars – Flat, Square, and Round Options Available

2025-08-01 16:58:15

6061 aluminum alloy is a cold-worked or extruded forged aluminum product, renowned for its excellent corrosion resistance, high machinability, superior weldability, and good formability. It is one of the most widely used heat-treatable aluminum alloys.

6061 Marine Aluminum is particularly suitable for marine applications such as yachts, speedboats, workboats, and offshore structures. It is easy to stamp, bend, and deep draw. We stock 6061-T6, 6061-T651, and 6061-T6511 to meet diverse application needs.

Aluminum bars from MC Aluminum fully comply with international marine classification standards including CCS, DNV, NK, ABS, BV, LR, KR, and more. Our production and quality management systems adhere to global marine standards, ensuring superior corrosion resistance, excellent weldability, and outstanding impact resistance.

Main Types and Applications of 6061 Aluminum Bars

To meet various structural needs in marine design, 6061 aluminum bars are categorized into:

1. Flat Bars

Flat aluminum used for ship frames, brackets, strips, and guide rails. Their flat profile offers enhanced resistance to bending and shearing stress—ideal for structural reinforcement.

2. Square Bars

Suitable for high-rigidity connectors, mechanical parts, and structural posts. Their square shape allows easy alignment and secure assembly with other components.

3. Round Bars

Commonly used for shafts, pins, bolts, and rivets. The uniform cross-section makes them ideal for applications involving torsional and tensile stress.

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Marine Grade Aluminum Bar Specifications


TypeDiameter/Width RangeLengthTemperTypical Applications
Round BarΦ6mm-Φ300mmCustomizableT6/T651Rudder shafts, radar masts, handrail posts
Square Bar10×10mm-150×150mmCustomizableT6/T651Frame connectors, mast base plates
Flat aluminumThickness: 6mm–100mm; Width: 10mm–300mmCustomizableT6/T651Ladder brackets, hatch rails, equipment bases
Classification CertificatesLR, ABS, CCS, etc.
MOQ1-3 tons


Typical Mechanical Properties


Alloy6061
TemperT6, T651
Ultimate Tensile Strength45 KSI / 310 MPa
Yield Strength21 KSI / 145 MPa
Elongation (%)25%
Brinell Hardness65


Product Advantages of 6061 Marine Aluminum Bars

  • Corrosion Resistance: Excellent resistance to seawater and marine atmospheric environments-essential for long-term marine applications.

  • Moderate Strength: Adequate structural strength while remaining easy to form and machine, unlike some high-strength alloys.

  • Superior Weldability: Compatible with various welding methods (MIG, TIG), making it ideal for marine assembly and repairs.

  • Excellent Machinability: Performs well in turning, drilling, milling, and other machining processes-ideal for complex components.

  • Eco-Friendly & Recyclable: A green, sustainable material with a high recycling rate-aligned with increasingly strict marine environmental regulations.

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Typical Marine Applications of 6061 Aluminum Bars

  • Ship hull keels and support structures

  • Handrails, guardrails, and ventilation duct frames

  • Marine machinery shafts and connectors

  • Hinges for hatches and deck doors

  • Offshore platform frames and support beams

  • Water recreation structures (e.g., wakeboard mounts, floating bridge connectors)

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Why Choose HAOMEI Aluminum?

1. Proven Expertise: Extensive experience supplying marine-grade aluminum to over 100 shipyards and engineering firms globally

2. Ample Inventory & Fast Delivery: Standard sizes available in stock with rapid fulfillment

3. Custom Fabrication Support: Engineering services to help shipbuilders translate drawings into ready-to-use components

4. One-Stop Export Services: Including customs clearance, professional packaging, shipping, and origin certificates

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