SES N 3136 Aluminum Structural Materials

Developed by Suzuki Motor Corporation as part of aluminum material standards, the “SES N 3136 Aluminum structural materials” standard describes the requirements for aluminum structural materials used in automotive components where load-carrying capacity, weight reduction, and durability are critical.

The automotive industry is undergoing a major transformation driven by the need for lightweight, fuel-efficient, and environmentally friendly vehicles. One of the key materials enabling this change is aluminum. As a structural material, aluminum plays a crucial role in reducing vehicle weight while maintaining safety, durability, and performance.

Aluminum structural materials are now widely used in both internal combustion engine vehicles and electric vehicles. Here, weight reduction directly contributes to increased energy efficiency and range.

Aluminum structural materials refer to engineered aluminum alloys used in the load-bearing components of a vehicle. These materials are specifically designed to withstand mechanical stresses, impacts, and long-term fatigue.

These materials are generally supplied in different ways:

• Extrusion: Beams, rails, and collision elements.
• Plates and panels: Body panels and reinforcements
• Casting: Complex nodes and connections.
• Forging: High-strength suspension and safety components.

Typical alloy families include:

• 5xxx series (aluminum-magnesium): Corrosion resistance
• 6xxx series (aluminum-magnesium-silicon): Strength and formability.
• 7xxx series: For very high strength applications.

The basic properties of aluminum in structural applications are as follows:

• High strength-to-weight ratio: Aluminum is approximately one-third the density of steel, allowing for significant weight reduction without compromising structural integrity.
• Corrosion resistance: A natural oxide layer protects aluminum from rusting, making it ideal for long-term automotive use, especially in harsh environments.
• Energy absorption: Aluminum performs well in collision scenarios due to its ability to absorb and dissipate impact energy, enhancing passenger safety.
• Formability and design flexibility: Processes such as extrusion and casting allow for complex geometries, enabling innovative structural designs.
• Recyclability: Aluminum is 100% recyclable, supporting sustainability goals in modern vehicle production.

Aluminum structural materials are used in a wide range of automotive components:

• Building Width (BIW): Masts, crossarms, roof rails
• Chassis and sub-chassis: The structural backbone of the vehicle.
• Suspension components: Control arms, joints
• Collision management systems: Collision boxes, impact beams.
• Battery housings (electric vehicles): Lightweight protective structures

Aluminum is particularly important in electric vehicles because it helps balance the weight of the batteries, increasing driving range and efficiency.

Aluminum structural components are manufactured using a variety of advanced production techniques:

• Extrusion: High-strength continuous profiles.
• Casting (mold casting, high-pressure casting): Complex shapes.
• Forging: Superior mechanical properties
• Rolling: Sheets for body structures

Combining methods include the following:

• Welding (MIG, laser)
• Joining with adhesive
• Riveting and mechanical connection

These processes enable manufacturers to strike a balance between cost, performance, and manufacturability.

The SES N 3136 standard defines the following:

• Material composition and alloy grades
• Mechanical performance requirements
• Surface quality and tolerances
• Testing and verification methods

This standard ensures consistency, safety, and quality in global supply chains, especially for critical structural components.

The role of aluminum in automotive structures is expected to increase for the following reasons:

• The proliferation of electric vehicles
• Development of multi-material tool architectures
• Increased focus on sustainability and recyclability.
• Advances in high-strength aluminum alloys

Automotive manufacturers are increasingly combining aluminum with steel and composites to achieve optimum performance.

Consequently, aluminum structural materials have become a cornerstone of modern automotive engineering. Their ability to reduce weight, increase efficiency, and improve safety makes them indispensable in today's vehicles. Despite some challenges, ongoing innovation and standardization ensure that aluminum continues to play a vital role in shaping the future of transportation.

The SES N 3136 standard typically covers the following:

• Material types:
• Extruded aluminum profiles
• Rolled sheets and plates
• Structural castings
• Structural components of tattoos
• Alloy properties: Common automotive structural alloys may include:
• 5xxx series aluminum-magnesium: Good corrosion resistance.
• 6xxx series aluminum-magnesium-silicon: Good strength and formability.
• 7xxx series: High-strength applications

SES N 3136 defines the following stringent requirements:

• Mechanical properties
• Tensile strength
• Yield strength
• Elongation
• Fatigue resistance
• Physical and chemical properties:
• Alloy composition limits
• Density and thermal behavior
• Surface and quality:
• Surface quality (free from cracks and debris)
• Corrosion resistance
• Dimensional tolerances

Materials conforming to the SES N 3136 standard are used in the following areas:

• Electric vehicles: Lightweight battery frames
• Collision management systems: Energy absorption
• Suspension systems: Control arms, joints
• Body structures: Poles, crossarms

These applications take advantage of aluminum's ability to reduce vehicle weight, improve fuel efficiency, and enhance performance while maintaining structural strength.

The SES N 3136 standard is considered necessary for the following reasons:

• Safety assurance: Ensures that structural components can withstand the following:
• Impact loads
• Fatigue during a long service life
• Weight optimization: Supports lightweight design without compromising strength.
• Production consistency: Standardizes the following:
• Material qualities
• Heat treatments
• mechanical performance
• Corrosion and durability control: Guarantees long-term performance.
• Gender
• Road salts
• temperature changes
• Supplier quality alignment: Ensures all suppliers meet original equipment manufacturer (OEM) level requirements (particularly important for global automotive manufacturing).

In conclusion, the SES N 3136 standard is a critical automotive materials standard that defines the quality, performance, and consistency of aluminum structural components.

For many years, our organization, with its competent and experienced team, has been understanding the needs of its clients, providing the advanced testing services they require, and assisting them in the establishment, implementation, and improvement of management systems. Within this framework, we also provide testing services compliant with the SES N 3136 standard.