Understanding 1/4 Aluminum Sheet Properties for Industrial Applications

Introduction: The Industrial Workhorse

At 6.35 mm (0.25 inches) thick—neither too thin nor too thick—the 1/4-inch aluminum sheet occupies a prime position in the world of industrial materials. It offers an ideal balance of structural strength, lightweight properties, and workability that makes it suitable for a remarkably wide range of applications.

With a density roughly one-third that of steel, a 1/4-inch aluminum plate weighs approximately 3.53 pounds per square foot, providing significant weight savings without compromising structural integrity. This combination of strength and lightness has made it the material of choice across industries—from marine and aerospace to automotive and construction.

Gwangyang Aluminum (GYAL), a leading Korean manufacturer with a 120,000-ton annual production capacity and a 50,000 sq.m facility in Gwangyang-Si, South Korea, supplies high-quality 1/4-inch aluminum sheet in multiple alloys to meet diverse industrial needs.

Key Properties of 1/4 Aluminum Sheet

Understanding the core properties of 1/4-inch aluminum sheet is essential for selecting the right material for your application:

Aluminum is also non-toxic and non-magnetic, making it suitable for sensitive environments such as food processing, medical equipment, and electronic enclosures.

Common Alloys Available in 1/4 Inch Thickness

Different aluminum alloys offer different balances of strength, corrosion resistance, and formability. Gwangyang Aluminum supplies 1/4-inch sheet in several key alloys:

5052 Aluminum – The Marine-Grade Choice

5052 is the highest-strength non-heat-treatable aluminum alloy among common grades. Its magnesium content gives it exceptional resistance to saltwater and marine atmospheres. It has excellent workability, good fatigue strength, and forms tightly sealed, leak-free seams.

• Best for: Marine components, boat hulls, fuel tanks, chemical equipment, and outdoor applications where corrosion resistance is critical

• Tensile strength: ~228 MPa (33,000 psi)

• Corrosion resistance: Excellent, especially in saltwater

6061-T6 – The Structural Powerhouse

6061 is a heat-treatable alloy (magnesium and silicon) that achieves its highest strength in the T6 temper. It offers excellent strength-to-weight ratio, good corrosion resistance, and superior machinability. It is one of the most versatile aluminum alloys available.

• Best for: Structural frames, CNC-machined parts, aerospace components, automotive chassis, and load-bearing applications

• Tensile strength: ~310 MPa (45,000 psi)

• Machinability: Excellent—chips cleanly for precision CNC work

3003 – The General-Purpose Workhorse

3003 is a commercially pure aluminum with manganese added for improved strength. It is the most widely used aluminum alloy due to its excellent characteristics. It offers good corrosion resistance (close to industrial pure aluminum), very good weldability, and excellent cold formability.

• Best for: General fabrication, chemical equipment, roofing, ductwork, and applications requiring moderate strength

• Tensile strength: ~200 MPa (29,000 psi)

• Corrosion resistance: Very good in atmospheric and freshwater environments

7075 – The Aerospace-Grade Option

For applications requiring maximum strength, 7075 is the strongest aluminum alloy, with strength comparable to many steels. However, it is more expensive and less formable than other grades.

• Best for: Aerospace, high-stress structural applications, and defense equipment

• Tensile strength: ~572 MPa (83,000 psi)

Weight & Dimensions

Standard sheet sizes include 4 ft × 8 ft (1220 × 2440 mm) as well as custom dimensions available upon request. The weight varies slightly by alloy composition.

Industrial Applications Across Sectors

The versatility of 1/4-inch aluminum sheet makes it suitable for a wide range of industries:

Construction & Architecture

• Building facades and curtain walls

• Structural supports and brackets

• Roofing and siding systems

Marine Industry

• Boat hulls and superstructures

• Deck plates and walkways

• Marine hardware and fittings

• Offshore structures

Aerospace & Aviation

• Aircraft structural components

• Interior paneling and flooring

• Equipment mounting plates

Automotive Sector

• Truck beds and trailers

• Chassis components and structural reinforcements

• Body panels and heat shields

Industrial Equipment

• Machine frames and bases

• Conveyor system components

• Work surfaces and protective panels

• Control boards and machine stands

CNC Machining & Precision Parts

• CNC-machined components and fixtures

• Custom tooling and jigs

Fabrication and Processing

1/4-inch aluminum sheet can be processed using standard metalworking techniques:

• Cutting: Shearing, sawing, laser cutting, and CNC routing are all effective

• Welding: MIG and TIG welding are the most common methods

• Bending: Proper tooling and bend radii are required depending on alloy choice

• Machining: Carbide-tipped tools are recommended for optimal results

• Drilling: Use appropriate techniques with lubrication

For 5052 and 3003, excellent weldability and formability make fabrication straightforward. For 6061-T6, careful heat management during welding is important to preserve mechanical properties.

Why Choose Gwangyang Aluminum?

Gwangyang Aluminum is a professional Korean manufacturer of aluminum sheet, coil, and checker plate in alloys including 5052, 5754, 5005, 3003, and 1050.

• Established in December 2019, located in Gwangyang-Si, Jeollanam-Do, Korea

• 120,000-ton annual production capacity

• 50,000 sq.m facility with advanced equipment: hot and cold rolling mills, annealing furnaces, milling machines, shears, and slitters

• Factory-direct sales—reducing intermediaries and offering competitive pricing

• 1000, 3000, and 5000 series alloys for diverse applications

Wide application areas: automobile, printing panel, transportation, building decoration, mechanical & electrical appliances, 3C electronic communication, petrochemical, and energy industries

Quality Assurance

High-quality 1/4-inch aluminum plate should have a flat and smooth surface with no black wire, scratches, or other visible defects. Gwangyang Aluminum‘s products are manufactured to meet rigorous quality standards, ensuring reliability and consistency for industrial fabrication projects. All products can be supplied with mill test certificates upon request.

Selecting the Right Alloy

Contact Gwangyang Aluminum today for a factory-direct quotation, technical data sheets, or sample orders for your 1/4-inch aluminum sheet project.

FAQ – 1/4 Aluminum Sheet Properties

Q1: What is the metric thickness of a 1/4-inch aluminum sheet? A: 1/4 inch equals 6.35 mm.

Q2: What is the weight of a 4×8 sheet of 1/4-inch aluminum?

A: A 4×8 foot sheet weighs approximately 113 pounds.

Q3: Which alloy is best for marine environments?

A: 5052 is the preferred choice for marine applications due to its excellent saltwater corrosion resistance.

Q4: Is 6061-T6 easy to machine?

A: Yes. 6061-T6 offers excellent machinability, making it a top choice for CNC precision parts.

Q5: Can 1/4-inch aluminum sheet be welded?

A: Yes. MIG and TIG welding are common for all alloys, though technique var

ies by grade.

Q6: What certifications does Gwangyang Aluminum hold?

A: Gwangyang Aluminum is a professional manufacturer operating under international quality standards with mill test certificates available for all products.

Q7: What is the minimum order quantity for 1/4-inch aluminum sheet?

A: Please contact Gwangyang Aluminum directly for current MOQ and pricing information.

Gwangyang Aluminum Industry Co., Ltd

Phone: +82 (0)61-762-6699

Email: gwangyangaluminum@gmail.com

Website: www.gyal.co.kr

Address: Gwangyang-Si, Jeollanam-Do, South Korea