DIN 3.3537 Aluminium Plates - WNr 3.3537 Plate & Sheets

Product Description

DIN 3.3537 (EN AW-5454) is a high-performance aluminum-magnesium alloy specifically engineered for high-temperature structural applications. While it shares many similarities with the 3.3535 (AlMg3) grade, the 3.3537 grade is uniquely stabilized to prevent intergranular corrosion when exposed to temperatures in the range of 65C to 170C.

Technical Designations & Equivalents

Why Choose 3.3537 (AlMg3Mn)?

The addition of Manganese (Mn) and a specific Magnesium content (2.7%) gives this alloy distinct advantages over standard 5000-series alloys:

• Thermal Stability: Most Al-Mg alloys with more than 3% Magnesium can become susceptible to stress corrosion cracking if held at elevated temperatures. 3.3537 is designed to remain stable and "immune" to this effect.

• Good Strength: It offers higher mechanical properties than 3.3535 (AlMg3) but remains highly ductile.

• Excellent Weldability: It is one of the best alloys for structural welding, maintaining high joint efficiency.

Mechanical Properties (Typical O / H111 / H22)

Common Forms: Plates, Sheets & Blocks

3.3537 Sheets (0.5mm “ 6mm)

• Pressure Vessels: Due to its temperature stability, it is a standard choice for vessels and tanks that hold hot liquids.

• Automotive: Used for heat shields and structural components near engine compartments or exhaust systems.

• Forming: In the H111 state, these sheets allow for complex bending and deep drawing.

3.3537 Plates & Heavy Sections (> 6mm)

• Road Tankers: A primary application for 3.3537 is the construction of chemical and fuel tankers, where both lightness and high-temperature integrity are required during steam cleaning or hot-filling.

• Marine Structures: Used in hulls and offshore platforms where superior salt-water resistance is mandatory.

Fabrication Insights

• Welding: Use AlMg5 or AlMg4.5Mn filler wires. The alloy is not prone to "hot cracking" and performs exceptionally well under TIG and MIG processes.

• Machining: It is considered "moderately machinable." It is tougher and less "gummy" than pure aluminum but will not produce the crisp, brittle chips seen in the 2000 or 7000 series.

• Anodizing: Provides a good protective and decorative finish, though it may have a slightly more yellowish/grey tint compared to 6000-series alloys due to the Manganese content.

Comparison: 3.3535 (AlMg3) vs. 3.3537 (AlMg3Mn)