5454 Aluminum Sheet & Plate: Material Properties, Tempers & Fabrication Guide
Engineered specifically for welded structures operating under sustained heat and corrosive exposure, 5454 aluminum is the premier non-heat-treatable alloy for pressure vessels, chemical transport tankers, hot asphalt trailers, and marine hulls. While standard 5052 aluminum serves general sheet metal needs and 6061-T6 covers structural frame parts, 5454 aluminum fills a critical engineering niche: complete immunity to stress-corrosion cracking (SCC) at elevated temperatures (above 65°C / 150°F) combined with high post-weld joint efficiency.
Understanding how 5454 aluminum behaves under work hardening, thermal stress, and cold forming enables engineering and procurement teams to optimize structural safety margins without over-specifying costly superalloys.
At-a-Glance Datasheet: 5454 Aluminum Chemical & Physical Profile
The chemical composition of 5454 aluminum is carefully balanced with magnesium and manganese to deliver high solid-solution strengthening without triggering thermal sensitization.
Element / Property | Standard Specification Range (ASTM B209 / EN 573-3) | Engineering Significance |
Magnesium (Mg) | 2.4% – 3.0% | Primary strengthening element; kept strictly below 3.0% to prevent high-temp SCC. |
Manganese (Mn) | 0.50% – 1.0% | Increases grain refinement, fatigue strength, and elevated thermal stability. |
Chromium (Cr) | 0.05% – 0.20% | Improves resistance to intergranular corrosion and stress cracking. |
Iron (Fe) | 0.40% max | Controls grain structure during rolling. |
Silicon (Si) | 0.25% max | Kept low to preserve ductility and high weldability. |
Copper (Cu) | 0.10% max | Minimized to prevent pitting corrosion in chemical and marine environments. |
Zinc (Zn) | 0.25% max | Limits localized galvanic corrosion. |
Aluminum (Al) | Balance (~95.0% – 96.5%) | Base matrix metal. |
Density | 2.69 g/cm³ (0.097 lb/in³) | Light weight; slightly denser than 5052 (2.68 g/cm³). |
Melting Range | 607°C – 652°C (1125°F – 1205°F) | High solidus point suitable for thermal processing and hot welding. |
Modulus of Elasticity | 70.3 GPa (10,200 ksi) | Governs stiffness and deflection under mechanical load. |
01. The Core Advantage: Elevated Temperature Stress-Corrosion Cracking (SCC) Immunity
In the 5000-series aluminum-magnesium alloy family, higher magnesium content generally increases tensile yield strength. However, alloys with more than 3.0% Magnesium (such as 5083 or 5086) suffer from a severe metallurgical flaw known as sensitization when exposed to sustained temperatures above 65°C (150°F).
- The Sensitization Mechanism: In high-magnesium alloys exposed to warmth, magnesium atoms migrate to grain boundaries to form an unstable beta-phase film. In the presence of moisture or mild chemicals, this film acts as an anode, rapidly dissolving and causing sudden intergranular cracking under load.
- The 5454 Solution: By capping magnesium at 2.4% to 3.0% and adding up to 1.0% Manganese, 5454 aluminum achieves mechanical strength comparable to higher-magnesium alloys while completely preventing beta-phase film formation.
- Primary Impact: 5454 aluminum is mandatory for heated liquid transport (asphalt, hot chemicals, coal), pressure vessels, boilers, and engine-adjacent marine bulkheads.
02. 5454 Aluminum Tempers & Mechanical Properties
As a non-heat-treatable alloy, 5454 aluminum relies on strain hardening (cold rolling) and thermal stabilization to achieve its final mechanical tempers.
Temper Designation | Processing Method | Ultimate Tensile Strength | Yield Strength (0.2% Offset) | Elongation (% in 50mm) | Brinell Hardness (HB) |
5454-O | Fully Annealed | 215 – 265 MPa (31 – 38 ksi) | 85 – 110 MPa (12 – 16 ksi) | 22% – 25% | 45 HB |
5454-H111 | Strain Hardened (Slight) | 220 – 270 MPa (32 – 39 ksi) | 100 – 140 MPa (15 – 20 ksi) | 18% – 22% | 50 HB |
5454-H32 | 1/4 Hard + Stabilized | 250 – 305 MPa (36 – 44 ksi) | 180 – 230 MPa (26 – 33 ksi) | 10% – 14% | 62 HB |
5454-H34 | 1/2 Hard + Stabilized | 285 – 340 MPa (41 – 49 ksi) | 210 – 260 MPa (30 – 38 ksi) | 8% – 10% | 73 HB |
5454-H38 | Full Hard + Stabilized | 335 – 385 MPa (49 – 56 ksi) | 270 – 310 MPa (39 – 45 ksi) | 4% – 6% | 85 HB |
03. Comparison Guide: 5454 vs 5052 vs 6061 Aluminum
Selecting the correct sheet or plate material requires balancing strength against post-weld joint efficiency and thermal limits.
Performance Dimension | 5454 Aluminum | 5052 Aluminum | 6061-T6 Aluminum |
Alloy Series & Type | 5000 Series (Non-Heat-Treatable) | 5000 Series (Non-Heat-Treatable) | 6000 Series (Heat-Treatable) |
Yield Strength (Standard Temper) | 180 – 230 MPa (H32) | 193 MPa (H32) | 276 MPa (T6) |
Elevated Temp Limit (> 65°C / 150°F) | Exceptional (Immune to SCC) | Moderate (Not recommended for heavy heat) | Poor (Over-ages and loses strength above 150°C) |
Post-Weld Strength Retention (HAZ) | 85% – 90% of base strength | 80% – 85% of base strength | Drops 40% – 50% in weld zone without heat treat |
Cold Sheet Bending & Formability | Outstanding | Superior | Fair (Prone to cracking at tight radii) |
CNC Machinability Index | Fair (~50%) | Fair (~50%) | Excellent (~80% – 90%) |
Primary Use Cases | Hot chemical tanks, dump trailers, boilers | Electronic chassis, fuel tanks, enclosures | Structural frames, machine parts, brackets |
04. Fabrication Guidelines: Welding, Machining & Forming
Maximizing yield rates when fabricating 5454 aluminum components demands adhering to specific shop-floor parameters:
i. Welding & Filler Alloy Selection
5454 aluminum exhibits outstanding weldability via MIG (GMAW) and TIG (GTAW) processes.
- For High-Temperature Applications (> 65°C / 150°F): Always specify ER5554 filler wire. ER5554 matches the base metal chemistry, ensuring the weld joint maintains total immunity to stress-corrosion cracking.
- For Ambient Temperature Structural Welds: ER5356 filler wire can be used to achieve slightly higher shear strength, provided the operating environment remains cool.
ii. Press Brake Bending & Cold Forming
- 5454-O / H111: Can be bent dead-flat (0T radius) without surface cracking.
- 5454-H32: Requires a minimum inside bend radius of 1.0x to 1.5x sheet thickness.
- 5454-H34: Requires an inside bend radius of 1.5x to 2.5x sheet thickness oriented perpendicular to the rolling grain direction.
iii. CNC Machining & Cutting Parameters
Like most ductile 5000-series alloys, 5454 aluminum carries a 50% machinability rating. It tends to produce long, gummy chips if cut with dull tooling.
- Tooling: Use 2-flute or 3-flute carbide end mills featuring high rake angles and polished flutes (or DLC coatings) to prevent Built-Up Edge (BUE).
- Coolant: High-pressure flood coolant or air-mist lubrication (MQL) is essential to clear swarf from deep pockets.
05. Primary Industrial Applications
- Road Transport & Bulk Tankers: Tank shells and baffles for hot asphalt trailers, crude oil tankers, and dry bulk cement hoppers exposed to road vibration and solar heat.
- Pressure Vessels & Industrial Boilers: Welded unfired pressure vessels (fabricated per ASME Section VIII specifications) operating under thermal cycling.
- Marine & Offshore Structures: Workboat hulls, trawler superstructures, and offshore living quarters exposed to continuous salt spray.
- Heavy Automotive & Mining: Dump truck bed liners, coal haulers, and structural cross-members requiring high fatigue strength and impact resistance.
Partner with Aether for Precision 5454 Fabrication
Whether your CAD drawings call for high-power fiber laser cutting of 5454-H32 aluminum sheet, precision press brake forming of tank shells, or certified TIG welding with ER5554 filler wire, execution dictates long-term field reliability.
At Aether, we combine multi-axis CNC machining, 3D laser profiling, precision press brake forming, and certified welding infrastructure under certified quality management system. We guarantee full material lot traceability, mill test reports (MTRs), and tight dimensional compliance on every shipment.
Ready to start your next manufacturing run? Contact the Aether Engineering Team Today to upload your 2D/3D CAD models for an instant quote, complimentary DFM feedback, and rapid lead times.
