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Aluminum MIG wire can look interchangeable on the shelf, but choosing the wrong filler alloy, wire diameter, or machine setup can lead to feeding problems and poor weld results. The Hobart H383808-R18 ER5356 Aluminum Welding Wire is a 0.035-inch, 1-pound spool intended primarily for welding compatible 5000-series aluminum with a gas-shielded MIG setup. Its main strengths are strong general-purpose performance and corrosion resistance in saltwater environments, while its biggest limitation is that it is not a gasless wire and is not suitable for every aluminum alloy or welding machine. This review explains where it fits, what you need before using it, and who should consider another filler metal.
Quick Verdict
Rating: 8.5/10
Best For: MIG welders working with compatible 5000-series aluminum, including fabrication exposed to moisture or saltwater.
Bottom Line: Hobart H383808-R18 is a practical ER5356 choice when you need a 0.035-inch aluminum MIG wire with good corrosion resistance. The tradeoff is that you need the correct shielding gas, aluminum-capable wire-feeding setup, and a compatible base alloy.
Key Specifications
| Specification | Detail |
|---|---|
| Brand | Hobart |
| Model | H383808-R18 |
| Product Type | Solid aluminum MIG welding wire |
| Filler Classification | ER5356 |
| Wire Diameter | 0.035 inch |
| Spool Weight | 1 lb |
| AWS Classification | A5.10 |
| Primary Base-Metal Use | Compatible 5000-series aluminum |
| Shielding Gas | Required for MIG welding |
| Corrosion Resistance | Designed to provide excellent resistance when exposed to saltwater |
| Package Dimensions | Approximately 4.0 x 4.0 x 1.75 inches |
| Best Use | General aluminum MIG fabrication where ER5356 is appropriate |
Key Takeaways
- Hobart H383808-R18 is a 0.035-inch ER5356 aluminum MIG wire supplied on a 1-pound spool.
- It is intended for compatible 5000-series aluminum base metals.
- ER5356 is valued for relatively high shear strength and strong corrosion resistance.
- Its saltwater corrosion resistance makes it especially relevant to marine and outdoor aluminum fabrication.
- This is solid MIG wire, so you need shielding gas and an aluminum-capable MIG setup.
- You should confirm both your base alloy and welder requirements before buying.
What Is the Hobart H383808-R18?
The Hobart H383808-R18 is a 1-pound spool of 0.035-inch ER5356 aluminum welding wire intended for gas-shielded MIG welding. ER5356 is a general-purpose aluminum filler classification commonly selected when compatible 5000-series aluminum needs good strength and corrosion resistance.
The product is most useful when you already know that ER5356 is appropriate for your base metal. The 0.035-inch diameter also means your welder, gun, contact tip, liner, drive system, and other feed components need to be suitable for that wire size and for soft aluminum wire.
This is an important distinction because aluminum filler metals are not universal. A wire that works well for one aluminum alloy or fabrication job may not be the correct choice for another.
Who Should Buy It?
Best For
- MIG welders working with compatible 5000-series aluminum.
- Marine or outdoor fabrication where saltwater corrosion resistance matters.
- Buyers who specifically need 0.035-inch ER5356 wire on a compact 1-pound spool.
Skip If
- You have a gasless-only wire welder and cannot use shielding gas.
- Your project requires a different filler classification, such as ER4043.
- You need TIG filler rods or stick electrodes rather than MIG spool wire.
Before You Buy: Do not choose aluminum filler wire by diameter alone. Confirm that ER5356 matches your base alloy and that your welder can use 0.035-inch aluminum wire with shielding gas.
Material Characteristics and Performance
The main reason to choose ER5356 is not simply that it is aluminum wire. Its filler-metal classification gives it different working characteristics and compatibility than other common aluminum fillers.
Hobart describes ER5356 as a general-purpose aluminum alloy with relatively high shear strength. That makes it useful for fabrication where the welded joint needs dependable mechanical performance, provided the filler metal is appropriate for the base alloy and application.
The wire’s 0.035-inch diameter is a common MIG-wire size, but actual voltage, amperage, wire-feed speed, gas flow, and other settings depend on your machine, material thickness, joint design, and welding conditions. Follow the welder manufacturer’s setup chart instead of using one fixed setting for every project.
Corrosion Resistance and Durability
Corrosion resistance is one of the strongest reasons to consider the H383808-R18. ER5356 is specifically noted for excellent corrosion resistance when exposed to saltwater.
That characteristic makes the filler useful for suitable marine fabrication, outdoor structures, trailers, equipment, and other aluminum projects that may face moisture. The filler wire alone does not make an entire assembly corrosion-proof, however. Base-metal selection, joint preparation, weld quality, surface treatment, and the surrounding environment still influence long-term durability.
For buyers comparing ER5356 with another aluminum filler, the environment in which the completed part will operate should therefore be part of the decision.
Fit and Compatibility
The H383808-R18 is intended for 5000-series aluminum base metals, so base-alloy compatibility should be checked before you order the spool. Do not assume that every piece of aluminum should be welded with ER5356.
You also need a MIG machine and wire-feed arrangement capable of handling aluminum. Aluminum wire is softer than common steel MIG wire, so feeding equipment and setup matter. Depending on your welder, this may involve an aluminum-compatible gun or spool-gun arrangement, suitable drive components, and the correct contact tip.
Check your welder manual for supported wire diameter, gun configuration, shielding gas, polarity, and starting parameters. That is safer and more reliable than copying settings from an unrelated machine.
Pro Tip: Verify the stamped or documented aluminum alloy before choosing filler metal. Matching the filler classification to the base metal is more important than simply buying the same wire diameter you normally use for steel.
How It Performs in Real Use
Marine Fabrication
For compatible 5000-series aluminum used around boats, docks, or other saltwater environments, ER5356’s corrosion resistance is a meaningful advantage. You still need proper joint preparation, shielding-gas coverage, and a suitable welding procedure to get a sound weld.
General Aluminum Fabrication
The 1-pound spool is practical for smaller fabrication jobs, repairs, and occasional aluminum work where ER5356 is specified. It gives you a manageable quantity without forcing you into a large production-size spool.
Automotive or Trailer Repair
This wire may be useful for compatible aluminum components in automotive, trailer, or equipment work, but you should identify the base alloy first. Vehicle components can use different aluminum alloys, heat treatments, and repair procedures, so ER5356 should not be treated as a universal repair wire.
Occasional Workshop Use
For a workshop that only welds aluminum from time to time, the compact 1-pound spool can be convenient. Store the wire clean and dry, and protect it from contamination between jobs.
| Application | Suitable Process | Key Check |
|---|---|---|
| Marine fabrication | Gas-shielded MIG/GMAW | Confirm base alloy and maintain shielding-gas coverage |
| 5000-series fabrication | Gas-shielded MIG/GMAW | Use machine settings appropriate to 0.035-inch aluminum wire |
| Automotive or trailer work | Gas-shielded MIG/GMAW | Verify the component’s aluminum alloy before welding |
| General repair | Gas-shielded MIG/GMAW | Use only where ER5356 is appropriate |
Setup Tips Before First Use
- Confirm the base alloy: Make sure ER5356 is suitable for the aluminum you intend to weld.
- Check wire diameter support: Your gun, contact tip, and feed system should be suitable for 0.035-inch aluminum wire.
- Use shielding gas: This is solid aluminum MIG wire and is not designed to operate as gasless flux-core wire.
- Prepare the joint: Keep the welding area clean and follow accepted aluminum joint-preparation practices.
- Start with manufacturer settings: Follow your welder’s chart or manual for initial voltage and wire-feed settings, then adjust for the material and joint.
- Protect the spool: Keep unused wire clean, dry, and protected from workshop dirt and contamination.
Compatibility and Safety
Aluminum MIG welding produces intense light, heat, sparks, hot metal, and welding fumes. Use a suitable welding helmet, gloves, protective clothing, adequate ventilation, and any additional personal protective equipment required by your work environment.
Shielding-gas cylinders also need to be handled, secured, connected, and stored according to the gas supplier’s and equipment manufacturer’s instructions. Never modify a regulator, hose, gun, or welder to force an incompatible setup to work.
If you are repairing a structural, vehicle, marine, pressure-containing, or safety-critical component, use the applicable welding procedure and seek qualified professional guidance where necessary.
Pros and Cons
Pros
- ER5356 filler classification is well suited to compatible 5000-series aluminum.
- Excellent corrosion resistance when exposed to saltwater.
- Relatively high shear strength for a general-purpose aluminum filler alloy.
- 0.035-inch diameter works with many aluminum-capable MIG setups designed for that size.
- Compact 1-pound spool is convenient for smaller jobs and occasional aluminum welding.
Cons
- Requires shielding gas and cannot be used as gasless aluminum flux-core wire.
- ER5356 is not the correct filler metal for every aluminum alloy.
- Aluminum wire feeding may require specialized or carefully configured MIG equipment.
Is It Worth the Price?
The Hobart H383808-R18 makes the most sense as a mid-range branded welding consumable for buyers who specifically need ER5356 in a 0.035-inch, 1-pound format. Its value comes from getting the correct filler classification and spool size rather than from extra accessories or bundled features.
It is worth considering if you work with compatible 5000-series aluminum and care about corrosion resistance in wet or saltwater environments. It is not the best value if your base metal requires another filler classification or if your welding machine cannot properly feed aluminum wire.
How It Compares to Alternatives
The closest alternatives include other 0.035-inch, 1-pound ER5356 MIG wires, such as the Weldmark by Blue Demon ER5356 and Forney ER5356. Those are direct same-class alternatives, so your decision can come down to machine compatibility, availability, manufacturer preference, and local pricing.
If your base alloy or welding procedure calls for ER4043 instead, Hobart also offers H381808-R18 ER4043 0.035-inch aluminum MIG wire. ER4043 and ER5356 are different filler classifications, so one should not automatically be substituted for the other. The correct choice depends on the base alloy and required welding procedure.
Frequently Asked Questions
What is the diameter of the Hobart H383808-R18 wire?
The wire diameter is 0.035 inch. Confirm that your contact tip and aluminum wire-feeding system support this diameter before installing the spool.
Can this wire be used without shielding gas?
No. H383808-R18 is solid aluminum MIG wire and requires shielding gas. It should not be treated as gasless flux-core welding wire.
Is this wire compatible with every MIG welder?
No. Your machine must support aluminum MIG welding, the required shielding gas, and 0.035-inch wire. Check the welder and gun documentation before buying the spool.
Can H383808-R18 be used for TIG or stick welding?
This specific product is supplied as 0.035-inch MIG spool wire. ER5356 filler metal is also sold in other forms for other welding processes, but this spool should not be confused with TIG filler rods or aluminum stick electrodes.
Which aluminum alloys is ER5356 intended for?
Hobart identifies ER5356 for welding compatible 5000-series aluminum base metals. You should still identify the exact base alloy and follow the appropriate filler-metal recommendation for your project.
Is this wire a good choice for marine welding?
It can be a strong option for compatible marine aluminum because ER5356 offers excellent corrosion resistance when exposed to saltwater. Base-metal compatibility and the required welding procedure still need to be confirmed first.
How much wire comes in one package?
The H383808-R18 is sold as a 1-pound spool. Published package dimensions are approximately 4.0 inches long, 4.0 inches wide, and 1.75 inches high.
Who should skip this welding wire?
Skip it if your welder cannot use shielding gas, your machine cannot properly feed aluminum wire, or your base alloy requires a different filler metal. It is also the wrong product if you specifically need TIG rod or stick electrodes.
The Bottom Line
The Hobart H383808-R18 ER5356 Aluminum Welding Wire is a strong choice for welders who specifically need 0.035-inch ER5356 MIG wire for compatible 5000-series aluminum, particularly where corrosion resistance matters. Its main limitation is compatibility: you need the correct base alloy, shielding gas, and an aluminum-capable MIG feeding setup, so buyers with gasless machines or projects requiring another filler classification should choose a different product.
