How to Store Welding Rods (Low-Hydrogen & General)
Low-hydrogen rods (E7018, E7018-1) must stay in a rod oven at 250-300F after opening. Cellulose rods (E6010, E6011) must never be baked. Standard rods (E6013, E7014) need dry storage only. Breaking these rules causes weld defects.
Not all welding rods need the same storage. Some are fine sitting on a shelf. Others will produce cracked, porous welds if they absorb even a small amount of moisture. Knowing which category your rod falls into saves you from bad welds and wasted money.
Which Rods Need Special Storage
Low-hydrogen rods need controlled storage. This includes E7018, E7016, and all low-hydrogen classified electrodes. The flux coating absorbs moisture from the air, and that moisture turns into hydrogen in the weld. Hydrogen causes cracking, especially in thick or restrained joints.
General-purpose rods are more tolerant. E6010, E6011, E6012, E6013, and E7014 have cellulosic or rutile coatings that either tolerate moisture or actually require some moisture content to function. Standard dry storage at room temperature is sufficient.
Stainless rods require some distinction. Rods with a -15 suffix (E308L-15, E309L-15) use basic (low-hydrogen) flux and need the same controlled storage as E7018. Rods with a -16 suffix (E308L-16, E309L-16) use rutile flux and are more moisture tolerant, but still benefit from dry storage. For code work, treat all stainless rods as moisture-sensitive because the low carbon content in the L designation means moisture-related carbon pickup can cause intergranular corrosion.
Rod Oven Temperatures
For low-hydrogen electrodes that have not been exposed to moisture, store at 250-300 deg F in a holding oven. This is the maintenance temperature.
If rods have been exposed to open air for more than a few hours, rebake at 700-800 deg F for 1-2 hours depending on the manufacturer recommendation. Lincoln, Hobart, and ESAB all publish specific rebaking charts for their products.
E6010 and E6011 should never be baked. Their cellulosic coating needs moisture to produce the driving arc characteristics. Baking them ruins the rod.
How to Tell If a Rod Is Bad
Look for visible rust on the flux coating. Check for chipping or cracking of the flux. If a low-hydrogen rod has been sitting in open air overnight in humid conditions, assume it needs rebaking.
In the weld: excessive porosity, cracking in the heat-affected zone, or a rough irregular arc on a rod that normally runs smooth all indicate moisture contamination.
When in doubt, rebake or discard. A few dollars in rods is cheaper than grinding out a bad weld.
Portable Rod Storage
For field work, use a portable rod oven (heated rod canister) that holds rods at 150-300 deg F. Take only what you will use in the next 2-4 hours. Return unused rods to the oven.
Sealed plastic rod containers with desiccant work for short-term transport but are not a substitute for heated storage on multi-day jobs.
What It Costs
A basic rod oven costs $100-200 and holds 10-20 pounds. Portable heated quivers for fieldwork run $80-150. Sealed hermetic packages of E7018 (10-pound boxes) cost about $5 more per box than bulk packaging but eliminate the oven requirement until the package is opened.
How to Store Welding Rods (Low-Hydrogen & General): Common Questions
Do welding rods go bad?
Yes, welding rods degrade when exposed to moisture. Low-hydrogen rods like E7018 are the most sensitive. Their flux coating absorbs humidity from the air, and that moisture introduces hydrogen into the weld, causing porosity and hydrogen-induced cracking. Even a few hours of exposure in humid conditions can compromise E7018 rods. General-purpose rods like E6013 and E6011 are more tolerant of moisture but will still degrade over time if stored in damp conditions. Visible signs of a bad rod include rust spots on the flux, chipping or flaking coating, and an unstable arc during welding. See the full E7018 specifications for detailed storage and reconditioning requirements.
How long do welding rods last in storage?
It depends on the rod type and packaging. Sealed hermetically packaged rods last for years regardless of type. Once opened, low-hydrogen rods like E7018 must go into a rod oven at 250-300F and can only be out of the oven for a maximum of 4 hours per AWS D1.1 before they need reconditioning. General-purpose rods (E6011, E6013, E7014) last months or longer in a dry environment at room temperature. Cellulosic rods (E6010, E6011) actually need some moisture in their coating to function, so they should be stored at room temperature and never baked. For detailed baking temperatures and reconditioning procedures, see the low-hydrogen electrode care guide.
Do MIG wire spools need special storage?
MIG wire spools should be kept sealed in their original packaging until use and stored in a dry location away from humidity. Moisture on MIG wire causes porosity in the weld because water vapor gets trapped in the weld pool as it solidifies. Copper-coated wire (like ER70S-6) resists surface corrosion better than bare wire, but the copper layer is thin and will not prevent problems in consistently humid environments. After opening, store partial spools in a sealed plastic bag with desiccant packets. If wire shows visible rust or discoloration, it should be discarded.
Reference data only. Verify all settings against manufacturer documentation and the applicable welding code before use. Amperage ranges are starting points that vary by position, fit-up, and material. Welding involves serious injury risks including burns, electric shock, fume exposure, and fire. This site does not replace proper training, certification, or employer safety procedures. See full terms of use.
Classification system defined by AWS A5.1/A5.1M, Lincoln Electric and Hobart storage guidelines.