5154B - AlMg3.5Mn0.3 Aluminium Plate, Sheet, Block(DIN, WNr)

Product Description

5154B (AlMg3.5Mn0.3) is a high-performance, non-heat-treatable aluminium-magnesium alloy. Under the DIN and Werkstoff-Nummer (WNr) systems, it is classified as a "special structural" alloy, designed to bridge the gap between the moderate strength of 5754 (AlMg3) and the high-strength marine-grade 5083 (AlMg4.5).

The "B" designation indicates a refined chemical control, specifically optimized for weldability and low-temperature toughness.

Technical Designations

Chemical Composition (Typical Weight %)

The addition of Manganese (Mn) is critical here; it refines the grain structure, which significantly improves the fatigue resistance and weld-joint strength compared to the standard 5154 grade.

• Magnesium (Mg): 3.20% “ 3.80%

• Manganese (Mn): 0.20% “ 0.50%

• Chromium (Cr): 0.20% max

• Silicon (Si): 0.40% max

• Iron (Fe): 0.50% max

• Aluminium (Al): Remainder

Mechanical Properties (Typical H111 / H112)

5154B is strain-hardened (work-hardened). It is typically supplied in the H111 (annealed and slightly leveled) or H112 condition for thick plates and blocks.

Supply Forms: Plates, Sheets & Blocks

1. 5154B Sheets (0.5mm “ 6mm)

• Characteristics: High ductility in the 'O' or H111 state.

• Usage: Often used for pressure vessels, cold-headed parts, and intricate welded assemblies.

2. 5154B Plates (6mm “ 150mm)

• Characteristics: Excellent flatness and internal stability.

• Usage: Marine bulkheads, fuel tanks, and structural components for transport vehicles.

3. 5154B Blocks

• Characteristics: These are often precision-sawn from thicker rolled slabs or cast plates.

• Usage: Engineering blocks for the chemical industry and cryogenic equipment where uniform mechanical properties are required throughout the thickness.

Key Performance Advantages

• 🌊 Exceptional Corrosion Resistance: Highly resistant to seawater and industrial atmospheres. Unlike some higher magnesium alloys, it is less prone to intergranular corrosion at slightly elevated temperatures.

• 🔠Superior Weldability: One of the best alloys for high-integrity welding. It works well with MIG and TIG using AlMg5 or AlMg4.5Mn filler wires.

• „ï Cryogenic Stability: 5154B does not undergo a ductile-to-brittle transition. Its strength actually increases at sub-zero temperatures, making it ideal for LNG (Liquefied Natural Gas) storage.

• ðŸ›ï Surface Quality: Responds excellently to anodizing for both protection and aesthetics.

Typical Applications

• Transport: Road tankers for chemicals and fuel.

• Marine: Welded structures for yachts, ferries, and offshore platforms.

• Cryogenics: Equipment and tanks for low-temperature gas storage.

• Pressure Vessels: Air tanks and chemical processing vessels.