ER5356 Aluminum MIG/TIG Welding Wire
Comprehensive technical specification for ER5356 aluminum-magnesium alloy filler metal. Covers chemical composition, mechanical properties, recommended MIG/TIG parameters, defect prevention, and procurement guidelines for marine, automotive, and structural fabrication.
Material Overview & Common Uses
ER5356 is an aluminum-magnesium alloy filler wire (nominal Mg 4.5–5.5%) designed for gas metal arc welding (GMAW/MIG) and gas tungsten arc welding (GTAW/TIG) of 5xxx series aluminum alloys such as 5052, 5083, 5086, 5456, and 5056. It produces weld deposits with high tensile strength (270–310 MPa) and excellent corrosion resistance, particularly in marine and chemical environments where saltwater and chloride exposure are factors.
Common applications: ship hulls, offshore platforms, aluminum boat fabrication, truck bodies, railcars, architectural structures, cryogenic vessels, and piping systems. ER5356 is also used for cladding and repair welding of cast aluminum components where magnesium content is above 3%.
- Preferred filler for 5083 and 5086 base alloys in marine construction
- Suitable for anodized weldments due to good color match after anodizing
- Higher strength alternative to ER4043 and ER5554 for load-bearing joints
- Not recommended for service temperatures above 65°C (150°F) in certain corrosive environments
Core Technical Properties & Sizing
| Property | Value / Specification |
|---|---|
| Alloy Family | Al-Mg (Aluminum-Magnesium) |
| AWS Classification | ER5356 |
| ISO Equivalent | ISO 18273 S Al 5356 |
| Nominal Composition (wt%) | Mg 4.5–5.5, Mn 0.05–0.20, Cr 0.05–0.20, Ti 0.06–0.20, Al balance |
| Ultimate Tensile Strength (as-welded) | 270–310 MPa (39–45 ksi) |
| Yield Strength (as-welded) | 120–180 MPa (17–26 ksi) |
| Elongation in 50 mm | 17–25% |
| Hardness (HBW 10/500) | 70–80 HB |
| Melting Range (approximate) | 575–635 °C (1067–1175 °F) |
| Density | 2.64 g/cm³ (0.095 lb/in³) |
| Electrical Conductivity | 29–31% IACS (annealed condition) |
Standard Spool Sizes & Packaging
| Diameter (in) | Diameter (mm) | Spool Type | Standard Weight |
|---|---|---|---|
| 0.030" | 0.8 mm | S100 / S200 | 1 kg / 2 kg |
| 0.035" | 0.9 mm | S200 / S300 | 2 kg / 5 kg |
| 0.045" | 1.2 mm | S200 / S300 / T300 | 2 kg / 5 kg / 7 kg |
| 0.047" | 1.2 mm (alternative) | S300 | 5 kg |
| 1/16" | 1.6 mm | S300 / T300 | 5 kg / 7 kg |
| 3/32" | 2.4 mm | T300 / Basket | 7 kg / 12 kg |
| 1/8" | 3.2 mm | Basket / Drum | 12 kg / 20 kg |
Machinability, Tooling & Feeds
ER5356 feeds smoothly through standard aluminum drive systems. Use U-groove or V-groove drive rolls designed for soft wire. Maintain a straight wire path with minimal friction to prevent birdnesting. Push-feed systems recommended; for long conduit distances (>4 m), use a push-pull system with a liner suitable for aluminum (e.g., nylon or Teflon®-lined).
Shielding gas: 100% argon (flow rate 15–25 CFH for MIG, 12–20 CFH for TIG) or argon/helium mixes for thicker sections. Gas lens recommended for TIG to reduce turbulence and improve arc stability.
Recommended MIG Parameters (DCEP — Direct Current Electrode Positive)
| Wire Diameter | Base Metal Thickness | Voltage (V) | Wire Feed Speed (IPM) | Amperage (A) |
|---|---|---|---|---|
| 0.035" (0.9 mm) | 1/8" – 3/16" (3–5 mm) | 19–22 | 250–350 | 100–150 |
| 0.045" (1.2 mm) | 3/16" – 5/16" (5–8 mm) | 21–25 | 200–300 | 160–220 |
| 1/16" (1.6 mm) | 5/16" – 1/2" (8–12 mm) | 24–28 | 150–220 | 220–300 |
| 3/32" (2.4 mm) | 1/2" – 3/4" (12–20 mm) | 27–31 | 100–160 | 300–400 |
Recommended TIG Parameters (AC — Alternating Current)
| Wire Diameter | Base Metal Thickness | Amperage (A) | Electrode (2% Thoriated/Lanthanated) | Filler Rod Diameter |
|---|---|---|---|---|
| 1/16" (1.6 mm) | 1/8" – 3/16" (3–5 mm) | 120–180 | 3/32" (2.4 mm) | 1/16" – 3/32" |
| 3/32" (2.4 mm) | 3/16" – 5/16" (5–8 mm) | 180–260 | 1/8" (3.2 mm) | 3/32" – 1/8" |
| 1/8" (3.2 mm) | 5/16" – 1/2" (8–12 mm) | 250–350 | 5/32" (4.0 mm) | 1/8" – 5/32" |
Note: Parameters are guidelines. Optimize based on joint geometry, position, and specific machine calibration. Preheat for sections above 12 mm (1/2") to 100–150 °C.
Common Defects & Quality Control
| Defect | Description | QC Method / Rejection Criterion |
|---|---|---|
| Porosity | Gas pockets in weld metal from hydrogen absorption, contaminated base metal, or inadequate shielding gas coverage. | Visual + X-ray / Radiography. Maximum porosity area ≤ 3% per AWS D1.2. Reject if clusters exceed 1/8" diameter in critical zones. |
| Hot Cracking | Solidification cracking in the weld crater or along the centerline. Common with improper filler selection or high restraint. | Visual + Dye Penetrant (PT) / ASTM E165. Any linear crack ≥ 1/16" (1.6 mm) is rejectable. Crater cracks require grinding and re-weld. |
| Lack of Fusion | Incomplete bonding between weld metal and base metal or between passes. Caused by low amperage, high travel speed, or poor technique. | Visual + Phased Array Ultrasonic (PAUT). Lack of fusion ≥ 1/8" (3.2 mm) in length is rejectable per AWS B1.11. |
| Undercut | Groove melted into base metal adjacent to weld toe, reducing cross-section. | Visual + Weld Gauge. Depth > 0.5 mm in material ≤ 6 mm, or > 0.8 mm in thicker material — reject and repair. |
| Oxide Inclusion / Stringers | Aluminum oxide entrained in weld deposit from inadequate cleaning or improper gas coverage. | Visual + Bend Test (ASTM E190). Discontinuities > 1/8" (3.2 mm) on the tension face of a bend specimen are rejectable. |
| Wire Feed Irregularity / Burn-back | Wire stutter, birdnesting, or arc-back into contact tip. Tension misalignment or liner contamination. | Process check: measure feed speed tolerance ±3%. Burn-back damage to contact tip — replace tip and inspect liner. |
Acceptance Criteria & Inspection Frequency
| Parameter | Method | Frequency | Acceptance Limit |
|---|---|---|---|
| Tensile Strength | ASTM E8 / B557 | Per 1000 kg lot or process change | ≥ 255 MPa (weld coupon) |
| Bend Ductility | Guided bend ASTM E190 | Per 500 kg lot | No crack > 3.2 mm in any direction |
| Radiographic Quality | ASTM E1032 / AWS B1.10 | Critical joints 100% | No linear indications > 1/4" (6.4 mm) |
| Wire Surface Finish | Visual (3× magnification) | Every spool | No drawing scratches > 0.05 mm depth |
Storage, Handling & Racking Guidelines
ER5356 wire is susceptible to moisture absorption and surface oxidation. Improper storage leads to hydrogen porosity and feedability issues. Maintain a controlled environment and follow FIFO (First-In, First-Out) rotation.
- Always keep wire in original sealed packaging until ready for use. Vacuum-sealed bags are preferred for long-term storage.
- Handle spools with clean, dry gloves. Oils, grease, and moisture from bare hands contaminate the wire surface.
- Do not store near welding booths, grinders, or chemical storage areas. Airborne particles and fumes accelerate surface degradation.
- Use desiccant packs inside spool enclosures in humid environments (>60% RH). Replace desiccant monthly.
Recommended Storage Conditions
| Parameter | Specification |
|---|---|
| Storage Temperature | 10–40 °C (50–104 °F) |
| Relative Humidity (RH) | < 60% (recommended < 40%) |
| Maximum Shelf Life (sealed packaging) | 3 years from date of manufacture |
| Maximum Shelf Life (opened spool, re-stored) | 6 months in controlled environment |
| Spool Orientation | Horizontal or vertical per manufacturer spec — avoid edge loading |
| Racking Type | Steel or aluminum cantilever rack with non-marring liners. Do not stack spools more than 2 high without pallets. |
| Incoming Inspection | Verify spool integrity, packaging seal, and mill certificate per AWS A5.10 |
| SupplyGrid Reorder Point | Set threshold to 2 weeks lead time + 20% safety stock based on average weekly consumption. Auto-generate PO when bin quantity hits minimum. |