ER5554 Aluminum Welding Wire
ER5554 is an Al-Mg filler wire matched to 5454 base metal. It retains stable mechanical properties and corrosion resistance at sustained service temperatures above 65°C, making it suitable for welding heat-exposed components. Where the base metal is 5454, ER5554 is the matching filler.
ER5554 belongs to the aluminum-magnesium family, with roughly 2.4–3.0% magnesium and minor chromium and manganese additions that refine the grain and stabilize the microstructure. Its defining characteristic is service suitability at elevated sustained temperatures: most high-magnesium fillers such as ER5356 and ER5183 are prone to stress-corrosion sensitization under prolonged heat, whereas ER5554 balances magnesium content against its microalloying elements to reduce this sensitization risk, allowing sustained service above about 65°C. Accordingly, where the base metal is 5454 and the weldment must withstand prolonged temperature rise, ER5554 is the matching filler. TGM keeps this grade in stock, supporting stable supply and replenishment and shortening lead times.
Specifications
| Classification | AWS A5.10 (ER5554) |
| Alloy family | Al-Mg |
| Diameter | MIG Ø 0.8 / 1.0 / 1.2 / 1.6 mm · TIG Ø 1.6 / 2.0 / 2.4 / 3.0 / 3.2 mm |
| Packaging | 7 kg layer-wound spool (smooth payoff, tangle-free); TIG rods 914 mm, 10 kg box |
| Process | TIG / MIG |
Mechanical (typical)
| UTS (as-welded) | ~240 MPa |
| Designed for | 5454 |
| Service temperature | Stable above 65°C |
Chemical composition (AWS A5.10)
| Element | Content % |
|---|---|
| Si | 0.25 |
| Fe | 0.40 |
| Cu | 0.10 |
| Mn | 0.50–1.0 |
| Mg | 2.4–3.0 |
| Cr | 0.05–0.20 |
| Zn | 0.25 |
| Ti | 0.05–0.20 |
| Be | 0.0003 |
| Al | Remainder |
Characteristics & advantages
- Stable at elevated service temperatures: the composition suits sustained service above about 65°C and effectively suppresses the stress-corrosion sensitization common to high-magnesium alloys, maintaining reliability through service life.
- Matched to 5454 base metal: the composition closely matches 5454 base metal, so weld metal and parent remain consistent in strength, ductility and corrosion resistance, giving predictable joint performance.
- Reliable mechanical properties: typical as-welded UTS of about 240 MPa with good ductility, meeting the strength requirements of general structural welding.
- Corrosion resistance: Al-Mg welds offer good resistance in both atmospheric and aqueous environments, suited to long-term service conditions.
- Smooth feeding, good process adaptability: suitable for both TIG and MIG, feeds smoothly by hand or by machine with a stable arc and few feed-jam interruptions, giving good welding operability.
- Consistent batches, stable supply: layer-wound spools pay off smoothly and tangle-free with consistent feeding from spool to spool; kept in stock for replenishment on demand to support production continuity.
Why ER5554 above 65°C: the sensitization problem in high-magnesium fillers
Aluminum-magnesium (5xxx) alloys and fillers containing more than about 3% Mg, including 5083, 5086 and 5456 and the fillers ER5356, ER5183, ER5556 and ER5654, are not recommended for sustained service above about 65°C (150°F). The limitation is a corrosion mechanism, not a strength rating. Prolonged exposure in roughly the 50–200°C range causes the magnesium-rich β-phase (Al3Mg2) to precipitate as a continuous network along the grain boundaries, a condition known as sensitization. The β-phase is anodic to the surrounding aluminum matrix, so a sensitized weld becomes susceptible to intergranular corrosion and stress-corrosion cracking, particularly where residual weld stress and an electrolyte such as salt water are present together.
The 65°C figure is filler-selection guidance rather than a code design limit: it appears as a note to the AWS A5.10 filler-selection guide table, which states that ER5183, ER5356 and ER5654 are not recommended for sustained elevated-temperature service, and it is repeated in the selection guides of the major filler manufacturers, which extend the same caution to ER5556.
ER5554 sits below the magnesium level at which this occurs. AWS A5.10 specifies 2.4–3.0% Mg for ER5554, matching alloy 5454, the highest-magnesium 5xxx alloy suitable for sustained elevated-temperature exposure. 5454 was developed specifically to resist the stress-corrosion cracking that affects higher-Mg 5xxx alloys above about 65°C, and the 5454/ER5554 combination does not become sensitized to SCC at elevated temperature. Upper design temperatures for 5454 in pressure equipment should be taken from the applicable code allowable-stress tables, such as ASME Section II Part D, rather than from a filler datasheet.
ER5554 vs ER5356 vs ER5183
The three Al-Mg wires in the TGM range are all ASME Section IX F-22 fillers, but they are not interchangeable. The comparison below uses AWS A5.10 nominal ranges and the filler-selection guidance summarized above.
| Item | ER5554 | ER5356 | ER5183 |
|---|---|---|---|
| ASME IX F-number (Table QW-432) | F-22 | F-22 | F-22 |
| Nominal Mg, AWS A5.10 | 2.4–3.0% | 4.5–5.5% | 4.3–5.2% |
| Relative as-welded strength | Lowest of the three (typical UTS about 240 MPa) | Higher than ER5554 | Highest of the three, from higher Mn rather than higher Mg; recommended (with ER5556) where a 276 MPa (40 ksi) minimum weld tensile is required on 5083 or 5456 |
| Sustained service above 65°C (150°F) | Suitable; the 5454/ER5554 combination does not sensitize | Not recommended (sensitization, SCC) | Not recommended (sensitization, SCC) |
| Matching base metals | 5454; also usable on 5052 and 5154 at elevated temperature | 5052, 5083, 5086, 5454, 5456 and 6xxx | 5083, 5086, 5456; 5xxx-to-6xxx joints where higher strength is needed |
| Typical use | Tankers and truck bodies carrying hot product, warm storage and chemical tanks, pressure vessels, heat exchangers | General 5xxx and 6xxx fabrication, tanks and chemical vessels | Shipbuilding, pressure vessels, cryogenic and LNG tanks in 5083-O |
Select by service temperature first. If any part of the weldment will sit above about 65°C for extended periods, ER5554 on 5454 is the combination that stays out of the sensitization range, and the joint is then designed around its lower as-welded strength. Below that temperature, ER5356 covers most 5xxx and 6xxx work and ER5183 is the step up where a higher weld tensile is specified. All three are F-22 under ASME Section IX, so a change between them is not by itself an F-number change for procedure qualification (QW-404.4). Section IX cautions, however, that fillers within a group are not to be substituted without considering base-metal compatibility and the required mechanical properties, and the other essential variables of the WPS, such as base-metal P-number, thickness and minimum tensile strength, must still be met. For selection or WPS direction on a specific job, see the selection guide or contact our technical team.
Typical applications
Alloy 5454 was developed for aluminum tank-trailer and dump bodies and has become a standard material for truck bodies carrying hot oil or asphalt and for storage tanks holding heated products. It is also used in welded pressure vessels and chemical storage tanks. ER5554 is the filler for these fabrications wherever sustained temperatures above 65°C (150°F) occur.
- Tank trailers and tanker bodies fabricated from 5454 sheet or extrusions, including bodies that carry hot oil or asphalt.
- Warm storage and chemical tanks holding heated products, where a high-Mg 5xxx weld would be exposed to the sensitization range over its service life.
- Welded pressure vessels and piping subject to temperature rise, particularly parts operating continuously above 65°C. 5454 is among the aluminum alloys commonly used for ASME Section VIII vessels, alongside 5083, 5086, 5052 and 6061, and aluminum alloys carry restrictive upper temperature limits in ASME Section II Part D that should be checked for each alloy. See aluminum welding wire for pressure vessels and tanks for the wider filler selection in this sector.
- Heat exchangers and elevated-temperature process equipment in chemical and petrochemical plant, where strength, corrosion resistance and temperature tolerance are needed together. Related filler guidance is on the energy and storage equipment page.
- Transportation equipment and automotive wheels in 5454.
- General aluminum structural welding in 5454 that must retain stress-corrosion resistance at elevated temperatures.
Base-metal match
ER5554 is primarily used to weld 5454 Al-Mg base metal and also suits other low-to-medium-magnesium aluminum alloys with elevated-temperature service requirements. If the part operates continuously below 65°C and higher joint strength is required, ER5356 or ER5183 may be used instead. For questions on grade selection or WPS direction, please contact our technical team; TGM provides selection guidance based on the actual service conditions of the workpiece.
Other grades
ER4043
A general-purpose Al-Si wire with good weld-pool fluidity and strong crack resistance, suited to a wide range of applications.
Learn more →Al-Si familyER4047
High silicon and low melting point, suited to brazing and gap filling.
Learn more →Al-Mg familyER5356
The most widely used Al-Mg wire, with high strength and good corrosion resistance, and the highest consumption volume.
Learn more →Al-Mg familyER5183
A high-magnesium, high-strength wire suited to marine and load-bearing structures.
Learn more →Frequently asked questions
Chemical composition follows the AWS A5.10 standard ranges; mechanical properties are typical values, with measured data provided in the per-batch certificate of quality.
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