Welding Consumables Guide: Wire, Electrodes, Filler Rods, and Tungsten
Choosing the right welding consumable is as important as choosing the right process. This guide covers MIG wire (ER70S-6, ER308L, ER4043), flux-core wire, stick electrodes (E6010, E7018), TIG filler rods, tungsten grades, contact tips, nozzles, and liners — with Texas supplier notes for each category.
MIG Wire (GMAW Electrodes)
MIG wire selection depends on the base metal, shielding gas, and application. The table below covers the most common wires used in Texas shops. Spool sizes: .030" for thin gauge, .035" most common for general fab, .045" for heavy plate and flux-core. Spools come in 2 lb (hobby), 10 lb (standard shop), and 33 lb (production) sizes.
| Wire | AWS Class | Base Metal | Gas | Notes |
|---|---|---|---|---|
| ER70S-6 | AWS A5.18 | Mild / low-alloy steel | C25 or CO₂ | Most common in Texas shops. High silicon — flows well, handles light mill scale. The default wire. |
| ER70S-2 | AWS A5.18 | Mild steel, dirty metal | C25 or CO₂ | Triple-deoxidized. Better for rusty or contaminated base metal. |
| ER308L | AWS A5.9 | 304 / 308 stainless | 98Ar/2CO₂ | Standard stainless MIG wire. L = low carbon, better corrosion resistance. |
| ER309L | AWS A5.9 | Dissimilar (SS to CS) | 98Ar/2CO₂ | Welding stainless to carbon steel. Cladding applications. |
| ER316L | AWS A5.9 | 316 stainless | 98Ar/2CO₂ | Marine, chemical, food processing. Higher Mo content. |
| ER4043 | AWS A5.10 | 6061 / 6063 aluminum | 100% Argon | General aluminum. Lower strength, better flow. |
| ER5356 | AWS A5.10 | 5xxx aluminum | 100% Argon | Structural aluminum, anodizes better. Do not use for elevated-temperature service. |
Flux Core Wire (FCAW)
E71T-1 (gas-shielded)
Used with CO₂ or 75/25 shielding gas. Standard structural FCAW — all-position capable, excellent deposition rate, good mechanical properties. The production choice for fabrication shops running AWS D1.1 structural work.
E71T-11 (self-shielded)
No shielding gas required. Ideal for outdoor work, field erection, and portable repair — wind resistance is the key advantage. Used heavily in Texas construction, pipeline erection, and agricultural equipment repair. Forgiving on dirty or rusty base metal.
E71T-GS (self-shielded, single-pass)
Single-pass only — do not use for multi-pass welds. Light repair and hobby use. Lower mechanical properties than T-1 or T-11. Available in most hardware stores but not suitable for structural or code work.
Flux core produces more fume and spatter than solid wire — ventilation is more critical. Self-shielded FCAW produces especially heavy fume; ensure adequate exhaust when working indoors.
Stick Electrodes (SMAW)
Stick welding remains dominant in Texas field work, pipeline, and maintenance welding. Electrode selection determines penetration, position capability, polarity requirements, and mechanical properties.
| Electrode | Position | Polarity | Penetration | Applications | Texas Use |
|---|---|---|---|---|---|
| E6010 | All | DCEP | Deep | Root passes, dirty/rusty metal, X-ray quality | Pipeline root, structural |
| E6011 | All | AC or DCEP | Deep | Dirty metal, limited access | Farm repair, field work |
| E6013 | All | AC, DCEN, DCEP | Medium | Sheet metal, light fabrication | Hobby, light fab |
| E7018 | All | DCEP or AC | Medium | Low-hydrogen, structural, X-ray quality | Structural steel, code work |
| E7024 | Flat / Horiz | AC or DCEP | Medium | High deposition flat work | Heavy plate fabrication |
| E308-16 | All | DCEP or AC | Medium | 304 stainless | Food, chemical, dairy |
| E309-16 | All | DCEP or AC | Medium | Dissimilar metals | Maintenance, overlays |
E6010 note: The "pipeline welder's rod" — requires a whipping or stepping technique and cannot be used on AC-only welders. Excellent for root passes on pipe, dirty or rusty structural steel, and tight access joints.
E7018 moisture note: In Texas humidity, E7018 rods left exposed absorb moisture within hours, causing porosity, sticking, and poor mechanical properties. Store in a rod oven at 250°F, or use hermetically sealed (vacuum-packed) cans and weld within 4 hours of opening.
TIG Filler Rods
TIG filler rods (also called EWP rods or bare wire) are sold in 36" lengths, in 1 lb or 10 lb tubes. Diameter selection: 1/16" for thin material and low amperage, 3/32" for standard general-purpose work, 1/8" for heavy material and high amperage. The most common rods stocked by Texas welding suppliers:
Mild and low-alloy steel. Triple-deoxidized — the standard TIG rod for steel in code work and pressure vessels.
304 stainless (308L), dissimilar stainless-to-carbon-steel joints (309L), and 316 stainless in marine or chemical service (316L).
General-purpose aluminum — 6061, 6063. Lower strength than ER5356, better flow and crack resistance.
Structural aluminum, anodized aluminum (anodizes bright silver vs. dark with 4043). Do not use for elevated-temperature service above 150°F.
Commercially pure (1xxx series) aluminum. Highly ductile, low strength — decorative and chemical applications.
Titanium Grade 2 — aerospace, chemical processing. Requires argon back-purging and special torch coverage. Specialty item; call ahead at Texas suppliers.
4130 chromoly steel — race car fabrication, aircraft structures, oil & gas. Common in Texas motorsports and aerospace fab shops.
Silicon bronze for brazing copper, copper-to-steel joints, and decorative work. Low heat input, good flow.
Inconel 625 equivalent — dissimilar metal joints, cladding, high-temperature service in petrochemical industry. Widely used in Texas refinery maintenance.
Tungsten Electrodes
Tungsten selection depends on polarity, base metal, and machine type (transformer vs. inverter). Most Texas TIG shops are transitioning from thoriated (red, mildly radioactive) to ceriated (grey) or lanthanated (gold/black) tungsten as the non-radioactive all-purpose alternatives.
| Color Band | Composition | Polarity | Primary Use |
|---|---|---|---|
| Green | Pure W | AC | Aluminum on older transformer machines |
| Red | 2% Thoriated | DCEN | Steel, stainless — mildly radioactive, being phased out |
| Grey | 2% Ceriated | DCEN / AC | Modern all-purpose replacement for thoriated; most Texas shops switching to this |
| Gold / Black | 1.5% Lanthanated | DCEN / AC | Excellent all-around, non-radioactive, long life |
| White / Yellow | Zirconiated | AC | Aluminum on inverter machines — holds balled tip well |
For DC (steel and stainless), grind tungsten to a point. For AC aluminum, use a balled tip — let the arc form the ball on the first strike on scrap. Inverter machines (most modern TIG machines) run AC aluminum better with ceriated or zirconiated tungsten than with pure green.
Contact Tips, Nozzles, and Liners
Contact Tips
Contact tips are consumable — replace when the bore becomes egg-shaped from wire friction, causing wire wander and arc instability. Match tip diameter exactly to wire: .030" tip for .030" wire, .035" for .035", .045" for .045". Running the wrong size causes wire wander even with a new tip. Tip position: recessed for spray transfer, flush or slightly extended for short-circuit transfer.
Nozzles
Conical nozzles give better access to tight joints (inside corners, T-joints). Cylindrical nozzles give better gas coverage for out-of-position welding. Keep nozzles clean — spatter inside the nozzle disrupts gas flow and causes porosity. Anti-spatter spray or gel on the nozzle interior reduces buildup.
Liners
Use a steel liner for steel and stainless wire. Use a Teflon or plastic liner for aluminum wire — aluminum is soft and will shred inside a steel liner. A dirty or kinked liner is the number-one cause of wire feeding problems. If feeding becomes erratic with a new contact tip, suspect the liner — pull it and inspect for kinks, dirt, or debris. Replace liners annually in production shops or whenever feeding degrades.
Buying Consumables in Texas
Independent welding supply distributors stock far better selections of consumables than big-box home improvement stores. Most Texas independents carry multiple brands across MIG wire, stick electrodes, TIG rods, and tungsten — Lincoln Electric, ESAB, Illinois Tool Works (Hobart), and Victor/Harris are the most common lines.
Lincoln Electric
Wide MIG wire and stick range; Innershield self-shielded FCAW
ESAB
Strong TIG rod and flux-core selection; OK brand stick electrodes
Hobart (ITW)
Fabshield self-shielded FCAW; competitive MIG wire pricing
For specialty items — ERTi-2 titanium rod, ER NiCrMo-3 Inconel wire, large quantities of E6010, or uncommon tungsten sizes — call ahead. Not every independent stocks every SKU. WeldIndex lists 188 verified independent welding suppliers across 125 Texas cities, filterable by city and category, to help you find the right distributor for your specific consumable needs.
Frequently Asked Questions
What MIG wire should I use for mild steel?
ER70S-6 is the standard choice for mild steel MIG welding. It has high silicon content that flows well and handles light mill scale. Use it with C25 (75% Argon / 25% CO₂) or 100% CO₂. For heavily rusted or contaminated base metal, switch to ER70S-2 with triple-deoxidizers.
What is the difference between E6010 and E7018 stick electrodes?
E6010 is a fast-freeze, deep-penetrating rod for root passes, pipeline work, and dirty metal — requires DCEP and good technique, cannot be run on AC. E7018 is a low-hydrogen rod for structural and X-ray quality work, runs on DCEP or AC, but must be kept dry. In Texas humidity, store E7018 in a rod oven at 250°F or use hermetically sealed cans.
Why does my E7018 rod stick or pop when I weld?
Sticking usually means low amperage or a damp rod. E7018 absorbs moisture quickly in Texas humidity — rods open more than 4 hours can become damp enough to cause porosity and sticking. Keep E7018 in a rod oven at 250°F or use sealed cans and weld within 4 hours of opening. Also verify DCEP polarity.
What TIG filler rod do I use for 304 stainless?
ER308L is the standard filler for 304 and 308 stainless steel. The L suffix means low carbon for better corrosion resistance. For welding stainless to carbon steel use ER309L; for 316 stainless in marine or chemical service use ER316L.
How do I know when my contact tip needs to be replaced?
Replace the contact tip when the bore becomes egg-shaped due to wire friction — an out-of-round bore causes wire wander and arc instability. A dirty or kinked liner causes the same symptoms; replace the liner when feeding becomes erratic even with a new tip. Match tip size exactly to wire diameter.
Where can I buy welding consumables in Texas?
Independent welding supply distributors carry far better SKU selections than big-box stores — wider product range, better brands (Lincoln Electric, ESAB, Hobart, Victor/Harris), and knowledgeable staff. For specialty items like ERTi-2 or large E6010 quantities, call ahead. WeldIndex lists 188 verified independent suppliers across 125 Texas cities.
Can I use any tungsten for TIG welding aluminum?
No. Aluminum TIG uses AC current and requires different tungsten. Pure (green) tungsten is traditional for transformer machines. Zirconiated (white/yellow) or ceriated (grey) tungstens hold a balled tip better on AC inverter machines. Thoriated (red) is DC-only — never use it for aluminum TIG.