DIN 3.4365 Aluminium Plates- WNr 3.4365 Plate, Sheet, Blocks

Product Description

Technical Designations & Equivalents

Mechanical Properties (T6 / T651 Temper)

WNr 3.4365 is one of the strongest aluminum alloys commercially available. In the T651 condition (stress-relieved plate), it rivals the strength of many structural steels.

Supply Forms: Plates, Sheets & Blocks

1. WNr 3.4365 Blocks (Tooling Grade)

Because of its extreme hardness and stability, 3.4365 is the industry standard for mould-making and high-stress jigs.

• Stability: The T651 temper is critical for blocks; it ensures that after you mill away 50% of the material, the remaining part does not bow or twist.

• Thickness: Often stocked in thicknesses up to 200mm or even 300mm for heavy engineering.

2. WNr 3.4365 Plates & Sheets

• High-Stress Components: Used for aerospace bulkheads where tensile stress is at its peak.

• Surface Protection: Like 2014A, 7075 is highly susceptible to corrosion. For sheet metal applications, it is almost always supplied as Alclad 7075 to protect the high-strength core from pitting.

3.4365 vs. 3.1255: Which to choose?

Essential Considerations

• Corrosion Performance: 3.4365 is prone to Stress Corrosion Cracking (SCC) if used in high-heat, high-saline environments. Specialized tempers like T73 are available if SCC is a major concern, though they reduce the total strength by about 10-15%.

• Welding: Strictly non-weldable by standard fusion methods. Attempting to weld 3.4365 will result in severe cracking and a nearly 50% loss in strength at the heat-affected zone.

• Anodizing: It responds very well to hard-anodizing, which creates a wear-resistant "ceramic" surface layer, making it ideal for sliding mechanical parts.