7014 Vs 7018 Welding Rod – Choosing The Right Stick For Strong
The E7014 welding rod is a fast-fill, iron powder electrode known for its high deposition rates, smooth arc, and easy slag removal, making it ideal for general-purpose, non-critical fabrication and hobbyist projects.
Conversely, the E7018 welding rod is a low-hydrogen electrode prized for its superior strength, ductility, and resistance to cracking, making it the preferred choice for structural welding, heavy fabrication, and critical applications where weld integrity is paramount.
Stepping into the world of stick welding, you quickly realize that not all electrodes are created equal. Each rod type is designed with specific characteristics to excel in different situations. For garage tinkerers and serious DIY metalworkers alike, understanding these differences is key to achieving strong, reliable welds.
Two of the most common electrodes you’ll encounter, and often compare, are the E7014 and the E7018. While both are general-purpose mild steel rods, their composition and performance vary significantly, impacting everything from arc stability to weld strength. Choosing the correct one can make or break your project.
This guide will break down everything you need to know about the 7014 vs 7018 welding rod debate. We’ll dive deep into their individual properties, ideal applications, and practical tips to help you decide which rod to grab for your next welding task. Let’s get that arc struck and those projects finished right!
Decoding Welding Rod Classifications: What the Numbers Mean
Before we compare the 7014 and 7018 directly, it’s helpful to understand the AWS (American Welding Society) classification system. This standardized code tells you a lot about an electrode’s properties and intended use.
What Does the “70” Mean?
The first two digits, “70” in both cases, indicate the minimum tensile strength of the deposited weld metal in thousands of pounds per square inch (psi).
So, “70” means the weld will have a minimum tensile strength of 70,000 psi. This is a good baseline for many mild steel applications.
Decoding the “1”
The third digit refers to the welding positions the electrode can be used in.
A “1” means the rod is an all-position electrode, capable of welding in flat, horizontal, vertical, and overhead positions. This versatility is a huge advantage for DIYers tackling various projects.
The Crucial Last Digit: Flux Coating and Current Type
The fourth digit is where the significant differences between 7014 and 7018 emerge. This number tells us about the type of flux coating, the current type (AC/DC) it runs on, and its penetration characteristics.
- “4” for E7014: Indicates a high-iron powder, titania-coated electrode. This flux type promotes a smooth, stable arc, excellent deposition rates, and easy slag removal.
- “8” for E7018: Signifies a low-hydrogen, iron powder-coated electrode. The low-hydrogen coating is crucial for preventing hydrogen-induced cracking in the weld, making it ideal for critical, high-strength applications.
The Versatile E7014 Welding Rod: Your Go-To for Speed and Ease
The E7014 electrode is often called a “fast-fill” or “high-deposition” rod. It’s a favorite among hobbyists and those doing general fabrication where speed and ease of use are priorities.
Key Characteristics of E7014
This rod features a high percentage of iron powder in its flux coating. This iron powder melts into the weld puddle, increasing the amount of metal deposited per pass.
- Smooth, Stable Arc: E7014 provides a very smooth and stable arc, making it easy to start and maintain, even for less experienced welders.
- High Deposition Rate: The added iron powder means you can lay down more weld metal faster, which is great for filling gaps or building up material quickly.
- Easy Slag Removal: The slag produced by a 7014 rod is typically self-peeling or very easy to chip off, revealing a clean, smooth weld bead.
- Good Bead Appearance: Welds often have a visually appealing, smooth finish with minimal spatter.
- Operates on AC or DC: This versatility means it works well with most common home welding machines.
Best Applications for 7014 Rods
Given its characteristics, the E7014 is an excellent choice for a variety of projects around the home workshop.
- General Fabrication: Perfect for fabricating tables, racks, stands, and other non-structural items.
- Repair Work: Great for repairing mild steel components that aren’t under heavy stress.
- Sheet Metal: Its smooth arc and controlled penetration can be beneficial for thicker sheet metal applications.
- Hobby Projects: If you’re building art pieces, shop furniture, or simple brackets, the 7014 is a user-friendly option.
- Filling Gaps: The high deposition rate makes it effective for filling larger gaps or building up worn surfaces.
Working with E7014: Tips for Beginners
If you’re just starting out, the 7014 is quite forgiving.
- Maintain a relatively short arc length for best results.
- Use a slight drag angle (pushing the puddle) to control the molten metal.
- Practice on scrap metal to get a feel for its travel speed and current settings. You’ll find it flows nicely.
The Robust E7018 Welding Rod: For Structural Integrity and Strength
When your project demands strength, ductility, and resistance to cracking, the E7018 electrode is the professional’s choice. It’s often referred to as a “low-hydrogen” rod, a critical distinction.
Key Characteristics of E7018
The E7018’s flux coating contains a significant amount of iron powder but, more importantly, very low levels of hydrogen-producing compounds.
- Superior Weld Strength and Ductility: Welds made with 7018 are incredibly strong, tough, and resistant to impact. They also offer excellent ductility, meaning they can deform without fracturing.
- Low-Hydrogen Properties: This is its defining feature. Hydrogen can cause embrittlement and cracking in welds, especially in thicker or high-carbon steels. The E7018 minimizes this risk.
- Excellent Penetration: It provides good penetration, ensuring strong fusion with the base metal.
- Good All-Position Capabilities: Like the 7014, it can be used in all positions, though overhead and vertical-up welding with 7018 can be more challenging due to the heavier puddle.
- Denser, More Consistent Welds: The resulting weld metal is typically dense, with fewer inclusions and porosity.
- DC+ Preferred (DCEP): While some versions can run AC, 7018 generally performs best on DC electrode positive (DCEP), which offers deeper penetration and a more stable arc.
When to Choose E7018: Critical Applications
The E7018 is designed for situations where weld integrity cannot be compromised.
- Structural Welding: Any application where the weld will bear significant load, such as building frames, heavy machinery, or bridge components.
- Heavy Equipment Repair: Repairing frames, buckets, or structural components on tractors, excavators, and other heavy machinery.
- Pressure Vessels and Pipe Welding: Where leaks or failures could have severe consequences.
- Welding Thicker Materials: Especially when dealing with thicker sections of mild steel or low-alloy steels.
- Critical Joints: Any joint that will experience high stress, vibration, or cyclical loading.
Mastering E7018: Techniques and Storage
Working with 7018 requires a bit more finesse than 7014.
- Short Arc Length: Maintaining a very tight arc is crucial for preventing porosity and ensuring good hydrogen control.
- “Whip and Pause” or “Drag” Technique: A slight weaving motion or a steady drag can help control the puddle. The puddle is heavier, so travel speed needs to be precise.
- Proper Storage is Paramount: 7018 rods are highly susceptible to moisture absorption, which reintroduces hydrogen into the flux. They must be stored in a dry, sealed container or, ideally, a rod oven at a specific temperature (usually around 250-300°F or 120-150°C) to maintain their low-hydrogen properties. If left exposed, they can absorb moisture and become compromised.
7014 vs 7018 Welding Rod: A Direct Comparison for DIYers
Now that we’ve looked at each rod individually, let’s put them head-to-head. Understanding the differences between a 7014 vs 7018 welding rod is essential for making an informed choice for your projects.
Ease of Use and Arc Stability
- E7014: Generally considered much easier to use, especially for beginners. It offers a very smooth, stable arc that’s easy to strike and maintain. The puddle is forgiving, and slag removal is usually effortless.
- E7018: Requires more skill and practice. The arc is tighter, and the puddle is heavier, demanding precise control of arc length and travel speed. Slag can be a bit tougher to remove, though it typically comes off cleanly if the weld is sound.
Weld Strength and Ductility
- E7014: Provides good tensile strength (70,000 psi minimum) and is suitable for general-purpose applications. However, its ductility and impact strength are not as high as 7018.
- E7018: Offers superior tensile strength (also 70,000 psi minimum, but often higher in practice), excellent ductility, and exceptional impact strength. This makes it ideal for welds that will be under significant stress or impact. Its low-hydrogen properties also significantly reduce the risk of cracking.
Slag Removal and Bead Appearance
- E7014: Produces a light, often self-peeling slag that is very easy to remove, leaving a smooth, aesthetically pleasing weld bead.
- E7018: Generates a heavier, glass-like slag that needs to be chipped off. While it requires a bit more effort, a properly laid 7018 bead will be smooth, dense, and clean once the slag is removed.
Material Compatibility and Joint Types
- E7014: Excellent for welding mild steels, especially in general fabrication and repair. Its high deposition rate is good for filling larger gaps or making fillet welds.
- E7018: The preferred choice for critical welding of mild steels, low-alloy steels, and sometimes medium-carbon steels. It’s ideal for butt joints, structural fillets, and any joint requiring maximum strength and crack resistance.
Cost and Availability Considerations
- E7014: Generally less expensive per pound than 7018. It’s widely available at most welding supply stores and even many hardware stores.
- E7018: Typically costs a bit more due to its specialized low-hydrogen flux. While also widely available, you might find it in larger quantities or require a specialized welding supplier. Remember the added cost of proper storage (rod oven) if you’re doing critical work.
Practical Scenarios: When to Grab Which Rod
Deciding between a 7014 and 7018 welding rod often comes down to the specific demands of your project.
For General Repair and Non-Structural Projects
If you’re building a new workbench frame for your shop, repairing a broken garden tool handle, or fabricating some decorative metalwork, the E7014 is likely your best bet. Its ease of use, fast deposition, and smooth finish make it perfect for projects where aesthetics and quick progress are valued, and the weld won’t be under extreme structural load. Think gates, fences, light trailers, or general shop repairs.
For Critical Joints and Heavy Fabrication
When you’re dealing with anything that needs to hold up under significant stress, such as repairing the frame of a utility trailer, fabricating heavy-duty brackets for a lifting mechanism, or building structural components for a custom vehicle, then the E7018 is the unequivocal choice. Its strength, ductility, and low-hydrogen properties are paramount for preventing failures in demanding applications. Always prioritize 7018 for anything structural or safety-critical.
Combining Rods in a Project
Sometimes, a single project might benefit from both. For example, you might use an E7018 for the root pass and critical structural joints on a heavy fabrication. Then, for filling out less critical sections or adding cosmetic cover passes, you could switch to an E7014 for its faster deposition and smoother finish. However, this requires careful planning and a good understanding of the stresses on each part of the weld. When in doubt, stick with the stronger rod for the entire project.
Essential Safety Practices for Stick Welding
Regardless of whether you’re using a 7014 vs 7018 welding rod, safety should always be your top priority. Stick welding involves intense heat, bright light, and hazardous fumes.
Personal Protective Equipment (PPE)
Always wear the right gear to protect yourself.
- Welding Helmet: A good auto-darkening helmet is essential to protect your eyes from arc flash and UV/IR radiation. Ensure it’s rated for the amperage you’re using.
- Welding Gloves: Heavy-duty leather gloves protect your hands from heat, sparks, and UV radiation.
- Flame-Resistant Clothing: Long-sleeved shirts and pants made of cotton or denim (never synthetics, which can melt) are a must. A welding jacket offers superior protection.
- Safety Glasses: Wear these under your helmet to protect against flying debris when chipping slag or grinding.
- Steel-Toe Boots: Protect your feet from falling objects and sparks.
Ventilation and Fume Management
Welding fumes can be harmful to your respiratory system.
- Work in a Well-Ventilated Area: Always weld outdoors or in a shop with good airflow.
- Use a Fume Extractor: For indoor welding, a localized fume extractor system is highly recommended to pull fumes away from your breathing zone.
- Position Yourself Properly: Try to keep your head out of the fume plume.
- Read Material Safety Data Sheets (MSDS): Understand the potential hazards of the specific metals and consumables you are using.
Frequently Asked Questions About 7014 and 7018 Welding Rods
Here are some common questions DIYers ask when comparing the 7014 vs 7018 welding rod.
Can I use a 7014 rod where a 7018 is specified?
Generally, no. If a project or specification calls for an E7018 rod, it’s usually because the weld needs superior strength, ductility, and resistance to cracking for structural or critical applications. Substituting a 7014 could compromise the integrity and safety of the welded component.
What’s the best rod for overhead welding?
Both 7014 and 7018 are all-position rods. However, the E7014, with its smoother arc and lighter puddle, can be slightly easier to manage in the overhead position for beginners. The E7018’s heavier puddle requires more skill to control overhead, but it’s used extensively in structural overhead welding due to its superior properties.
How do I store 7018 rods to prevent moisture absorption?
E7018 rods are highly susceptible to moisture. For critical applications, they should be stored in a heated rod oven at around 250-300°F (120-150°C) after opening. For hobbyists, storing them in a sealed, airtight container with desiccant packets in a dry environment can help, but it’s not a substitute for a proper rod oven for critical work.
What amperage settings are typical for these rods?
Amperage settings vary significantly based on rod diameter, welding position, and base metal thickness. As a general guide, a 1/8″ (3.2mm) E7014 might run from 100-150 amps, while a 1/8″ (3.2mm) E7018 might run from 90-140 amps. Always consult the rod manufacturer’s recommendations on the packaging and test on scrap material.
Is one rod “better” than the other for beginners?
For absolute beginners, the E7014 is generally more forgiving and easier to learn on due to its smooth arc and easy slag removal. It allows new welders to focus on arc control and travel speed without battling a heavy puddle. However, it’s wise to transition to 7018 as skills improve, especially for any structural work.
Choosing the right welding rod is a fundamental skill for any metalworker. While the E7014 offers a forgiving arc and fast deposition for general-purpose tasks, the E7018 stands as the champion for structural integrity and demanding applications. Understanding their unique characteristics empowers you to make informed decisions, ensuring the strength and quality of your welds.
Remember, every weld is a testament to your craftsmanship and attention to detail. Practice, prioritize safety, and always select the electrode that best suits the demands of your project. Keep that hood down, stay safe, and happy welding!
