Copper Bridge USA — Factory-direct welding electrodes & wire, shipped from Riverside, CA.
Shop NowHow to Choose the Right Welding Electrode:
A Practical Guide to Processes and Consumables
This guide is written by the team at Copper Bridge the official U.S. branch of Jinlong Welding Electrode Co., Ltd., a manufacturer with 30+ years of production experience and distribution across more than 60 countries. We're not a reseller. We're the factory, stocked and shipping from Riverside, CA. Everything we recommend here, we make and stand behind.
Pick the wrong electrode and you're fighting the weld the whole shift: spatter everywhere, porosity in the bead, joints that won't pass inspection, and time wasted grinding out mistakes. Pick the right one and everything just works.
The problem is that the sheer number of options stick electrodes, MIG wire, flux-cored wire, stainless, low-hydrogen can feel overwhelming without a framework. The good news: consumable selection is a controlled matching problem. You're matching filler chemistry, mechanical properties, and usability to the job. Work through those variables in order, and the right electrode becomes obvious.
Identify your base metal → pick a process that fits your position, environment, and power source → choose a filler classification that meets your strength and chemistry needs → fine-tune diameter and parameters. Four steps. Every time.
Step 1: Know Your Welding Process First
The process you're running determines what type of consumable you need. Each process has different strengths, and the filler options within each are built around those strengths.
SMAW — Stick
Covered ElectrodeAll-position versatility, no external gas. Works outdoors and in dirty conditions. Go-to for structural steel, repair, and pipelines.
GMAW — MIG/MAG
Solid WireHigh productivity, low cleanup, consistent arc. Best for shop fabrication on mild steel, stainless, and aluminum. Needs shielding gas.
FCAW-G — Flux-Core (Gas)
Tubular Wire + GasHigher deposition than solid wire with better out-of-position performance. Great for structural and heavy fab in a shop environment.
FCAW-S — Flux-Core (Self-Shield)
Tubular Wire, No GasRuns without external gas — designed for field and outdoor work where wind would blow a gas shield away. Top choice for ironworkers.
GTAW — TIG
Tungsten + Filler RodHighest control and cleanliness. Used on thin stainless, aluminum, and critical root passes. Slower but exceptional weld quality.
SAW — Submerged Arc
Wire + Granular FluxExtremely high deposition on thick plate. Shop-only, flat and horizontal positions. Wire and flux combination both affect weld properties.
Step 2: Read the Label — How AWS Classifications Work
Every electrode and wire carries an AWS classification stamped right on it. Once you know how to read it, the marking tells you almost everything: what it is, minimum tensile strength, approved positions, and coating or shielding gas details.
SMAW Stick Electrodes — Breaking Down "E7018"
Designates a consumable arc welding electrode — it melts and becomes filler metal.
The weld deposit meets at least 70 ksi. E60** = 60 ksi, E70** = 70 ksi.
"1" = all positions: flat, horizontal, vertical, and overhead. "2" = flat and horizontal only.
Defines coating type and compatible current. Low-hydrogen means DCEP or AC — and requires moisture-controlled storage.
Copper Bridge E7018 — Low Hydrogen Stick Electrodes
Manufactured to AWS A5.1 standards. The standard choice for structural steel, all-position welds, and applications where cracking risk is a concern. Available in 3/32" and 1/8".
GMAW Solid Wire — Breaking Down "ER70S-6"
Can be used as a MIG wire electrode or as a TIG filler rod depending on the process.
Minimum 70,000 PSI tensile in the deposited weld — same system as stick electrodes.
Distinguishes it from tubular (flux-cored) wire. Requires external shielding gas.
Higher Mn and Si content means better tolerance for mill scale and surface contamination — why ER70S-6 is the default for most carbon steel MIG work.
Copper Bridge ER70S-6 — Solid MIG Welding Wire
The workhorse of carbon steel MIG welding. Excellent arc stability, smooth bead profile, and deoxidizer chemistry to handle real-world shop conditions. Available in .030" and .035" in 2 lb, 11 lb, and 33 lb spools.
FCAW Tubular Wire — Breaking Down "E71T-GS"
A consumable electrode fed continuously through the wire feeder.
First digit = tensile strength ÷ 10,000. "7" = 70 ksi minimum.
Approved for all welding positions. "0" would indicate flat and horizontal only.
The wire is hollow, containing flux and/or metal powder in its core.
Gasless, self-shielded, single-pass rated. Generates its own shielding — no external gas cylinder needed. Ideal for outdoor and field use.
Copper Bridge E71T-GS — Gasless Flux-Core Wire
Built for field work where running gas isn't practical. No bottle, no regulator — consistent self-shielded welds on carbon steel. Available in .030" and .035" in 2 lb, 11 lb, and 33 lb spools.
Step 3: Match the Consumable to the Job
With the process and classification system understood, selection comes down to eight variables. Some will be locked in by your WPS or code; the rest are yours to optimize.
The Consumable Selection Checklist
- Base metal family and grade. Carbon steel, low-alloy, stainless, aluminum, cast iron? Unknown base metal forces a more conservative approach.
- Joint type and access. Butt vs. fillet, tight access vs. open root — these affect which slag systems and freezing behavior will work for you.
- Welding position. Flat and horizontal only, or all-position? The position designator in the classification exists for exactly this reason.
- Environment and power source. Outdoor/windy conditions push you to SMAW or FCAW-S. Gas-dependent processes need a stable environment. AC-only machines rule out some electrodes.
- Required mechanical properties. Tensile strength class, impact toughness, corrosion resistance, PWHT condition — code and service requirements drive these.
- Hydrogen cracking risk. Thick sections, high restraint, hardenable steels, or cold conditions all elevate cracking risk — push toward low-hydrogen consumables with proper storage.
- Shielding gas or flux requirements. The wire and gas/flux classifications are a matched system — don't swap one without reconsidering the other.
- Code and WPS requirements. When a WPS governs, it specifies the filler metal classification. Source a certified product that matches.
Step 4: Common Scenarios — What to Grab Off the Shelf
Here's how the checklist plays out for the situations you'll encounter most. Always defer to your governing WPS or code when one applies.
Process: GMAW (MIG) with solid wire. High productivity, low cleanup, consistent arc.
Consumable: ER70S-6 solid wire — elevated Mn/Si deoxidizers handle mill scale typical on shop plate. Use .030" for thin material, .035" for general fab.
Watch out for: Short-circuit transfer for thin material; spray transfer for higher deposition on flat/horizontal plate. Gas and parameters must match the intended mode.
Process: FCAW-S or SMAW — both generate their own shielding and aren't affected by wind.
Consumable (wire): E71T-GS self-shielded flux-core wire. Runs on DCEN, no gas bottle required. Rated for single-pass welds on carbon steel.
Consumable (stick): E6011 stick electrodes — runs AC or DC, penetrates through rust, paint, and mill scale.
Process: SMAW with low-hydrogen electrodes. When D1.1 or another structural code applies, the WPS specifies your filler classification.
Consumable: E7018 low-hydrogen stick electrodes. All-position, DCEP or AC. Low-hydrogen coating dramatically reduces cracking risk in restrained joints and heavier sections.
Critical storage: Low-hydrogen electrodes absorb moisture from air. Keep in a sealed container or electrode oven. Reconditioning is possible but prevention is better.
Process: SMAW with E6013 — smooth-running, easy-to-control, ideal for lighter fabrication and shop training.
Consumable: E6013 stick electrodes produce a soft arc, fluid slag that's easy to chip, and a clean bead. Runs on AC or DC and tolerates less-than-perfect fit-up.
Watch out for: The soft arc that makes E6013 easy to run also makes it the wrong choice for thick sections or high-restraint structural joints requiring low-hydrogen.
Process: GTAW (TIG) for thin sheet and precision work; GMAW or SMAW for production and heavier sections.
Consumable: E308L-16 stainless stick electrodes for SMAW on austenitic 300-series stainless. The "L" controls carbon content to reduce sensitization risk. DCEP, all-position.
Safety: Stainless welding produces hexavalent chromium (Cr(VI)) fumes — a known carcinogen. Proper ventilation and respiratory protection are non-negotiable.
Process: FCAW-G (gas-shielded flux-core) combines all-position capability of stick with significantly higher deposition than solid wire.
Consumable: E71T-1 gas-shielded flux-core wire — all-position capable, requires CO₂ or Ar/CO₂ shielding. Enables vertical and overhead welding at speeds solid wire can't match.
Watch out for: Stick-out distance (CTWD) matters more than with solid wire. Follow manufacturer parameter recommendations by diameter and position.
Step 5: Storage and Handling — Don't Let Good Electrodes Go Bad
The best electrode will underperform if stored wrong. This is especially true for low-hydrogen SMAW electrodes — moisture pickup directly degrades weld quality and reintroduces hydrogen into joints where you worked to keep it out.
Low-H Stick Electrodes (E7018)
Store in a sealed container or electrode oven at 250–300°F. Once packaging is opened, the clock starts. Redry per manufacturer guidelines if exposure occurred.
Standard Stick Rods (E6011, E6013)
Less moisture-sensitive than low-hydrogen rods, but keep them dry. Don't bake at oven temperatures meant for low-hydrogen — you can damage the coating.
Solid MIG Wire
Keep spools clean and rust-free. Rust causes feeding issues and weld defects. Store in sealed packaging or with a wire cover when not in use.
Flux-Core Wire
Self-shielded and gas-shielded flux-core wires can be sensitive to moisture in the core flux. Keep sealed when not in use.
Shielding Gas Cylinders
Secure cylinders upright with a chain or restraint at all times. Incorrect gas mix can produce a weld that looks fine but fails mechanically.
SAW Flux
For hydrogen-critical applications, re-dry at 300–350°C for at least 2 hours. Follow your specific manufacturer protocol.
The Three Rules That Prevent Most Wrong Picks
When a WPS or code applies, it governs. Filler metals are referenced by AWS/ASME/ISO classifications — your job is to source a certified product that matches, not re-engineer the selection.
If restraint, section thickness, or cracking risk is present, choose low-hydrogen consumables and store them correctly. A low-hydrogen electrode left open for a week is not actually low-hydrogen anymore.
Unknown base metals, dissimilar joints, and cast iron repairs all deserve extra caution. Prioritize crack resistance and metallurgical compatibility over convenience.
Frequently Asked Questions
The questions welders search most — answered straight.
E6011 has a cellulosic coating that produces a forceful, penetrating arc and runs on AC or DC. It cuts through rust, paint, and mill scale — the top choice for field work and dirty base metal. E6013 has a rutile coating with a softer arc, lighter penetration, and easier slag removal. Better for clean sheet metal, light fabrication, and beginners.
It depends on the wire type. FCAW-G (gas-shielded, e.g. E71T-1) requires external CO₂ or Ar/CO₂ shielding gas. FCAW-S (self-shielded, e.g. E71T-GS) generates its own shielding from the core compounds and needs no external gas — ideal for outdoor and field use.
The E stands for electrode — it identifies the product as a consumable arc welding electrode that melts and becomes filler metal. The 70 indicates 70,000 PSI minimum tensile strength, the 1 means all-position, and the 8 describes the low-hydrogen iron powder coating and current type.
No. ER70S-6 is a solid MIG wire that requires external shielding gas (typically 75% Ar / 25% CO₂ or 100% CO₂) to protect the weld pool. Without gas you will get severe porosity. For gasless welding, use a self-shielded flux-core wire like E71T-GS instead.
Store E7018 electrodes in a sealed container or electrode oven at 250–300°F. Low-hydrogen electrodes absorb moisture from the air once the packaging is opened. If exposure occurred, redry per the manufacturer's guidelines before use.
E6013 is widely considered the best stick electrode for beginners. It has a soft, forgiving arc, fluid slag that is easy to chip, and tolerates less-than-perfect fit-up. It runs on AC or DC and produces clean, smooth beads on thin to medium carbon steel.
Written by the Copper Bridge USA Team
Copper Bridge is the official U.S. distribution branch of Jinlong Welding Electrode Co., Ltd. — a manufacturer with over 30 years of production expertise and customers across 60+ countries. Our products ship from our warehouse in Riverside, CA. We're not a reseller. We're the factory.
Factory-Direct. No Middleman. Shipped from Riverside, CA.
Copper Bridge is the official U.S. branch of Jinlong Welding Electrode Co., Ltd. — 30+ years of manufacturing experience, distribution across 60+ countries. You're buying directly from the source.
