- All
- Product Name
- Product Keyword
- Product Model
- Product Summary
- Product Description
- Multi Field Search
AWS A 5.1 E7018
1kg,2kg,5kg,10kg,20kg
1lb;2lb;4.5lb;11lb;15lb;20lb;33lb;44lb
1.6mm,2.0mm,2.4mm,3.2mm,4.0mm,5.0mm
1/16 ″in;5/64″in;3/32″in;1/8″in;5/32″inch
Acceptable (design the pack with your logo)
15 Days
Product Description
The AWS A5.1 E7018 is a type of shielded metal arc welding (SMAW) electrode. It features a low-hydrogen, iron powder coating and is renowned for producing high-quality welds with exceptional mechanical properties. This specific **E7018 welding rod** is a staple in many critical fabrication processes.
E7018 is classified as low-hydrogen because its coating is formulated to contain minimal moisture, thereby depositing very low levels of diffusible hydrogen into the weld metal. This characteristic is crucial for preventing hydrogen-induced cracking, especially in high-strength steels. Minimizing **hydrogen cracking** is a primary benefit of this electrode.
Welds created with E7018 exhibit excellent mechanical properties, including a minimum tensile strength of 70,000 psi, good ductility, and superior impact toughness. These properties make it ideal for demanding applications. The **E7018 tensile strength** and ductility are key performance indicators.
The E7018 is an all-position electrode, meaning it can be effectively used in flat, horizontal, vertical up, and overhead positions. Its stable arc and manageable puddle contribute to its versatility across various joint configurations. This **all-position welding electrode** is highly adaptable.
E7018 electrodes are typically used with Direct Current Electrode Positive (DCEP), also known as reverse polarity. While some variations may allow AC, DCEP generally provides the best performance, including arc stability and penetration. Proper **E7018 amperage** and polarity settings are crucial for optimal results.
E7018 is widely used in critical applications such as structural steel fabrication, pressure vessel manufacturing, heavy equipment repair, shipbuilding, and pipe welding. Its robust weld properties are essential for these demanding industries. It is often the preferred **electrode for structural welding**.
Due to their low-hydrogen nature, E7018 electrodes must be stored in dry, moisture-controlled conditions, ideally in a heated electrode oven. Exposure to atmospheric moisture can compromise their low-hydrogen properties, leading to potential weld defects. Proper **E7018 storage** is paramount for weld quality.
If E7018 electrodes absorb moisture, the hydrogen content in the weld metal can increase. This significantly raises the risk of hydrogen-induced cracking, especially in susceptible materials like high-strength steels. This phenomenon is often called **hydrogen embrittlement**.
For many applications, especially with thicker materials or higher-carbon steels, preheating the base metal is often recommended when using E7018. Preheating helps to slow down the cooling rate of the weld, further reducing the risk of cracking and improving the overall mechanical properties. Always consult a relevant **welding procedure specification (WPS)**.
E7018 electrodes produce a relatively heavy, yet easily removable slag. This slag helps to shape the weld bead, protect it from atmospheric contamination during cooling, and ensures a clean, smooth appearance. The **E7018 slag removal** is typically straightforward.
While both are carbon steel electrodes, E7018 offers superior mechanical properties, particularly impact toughness, and significantly lower diffusible hydrogen. E6011 is more forgiving on dirty surfaces and uses AC, whereas E7018 requires cleaner surfaces and primarily DCEP. E7018 is preferred for critical applications demanding higher integrity. Comparing **E7018 vs E6011** highlights their distinct uses.
E7018 can be used for root passes, especially in thicker sections or when superior mechanical properties are required throughout the weld. However, due to its heavier slag, some welders prefer a more penetrating electrode like E6010 or E6011 for open root passes, followed by E7018 for fill and cap passes. Its use in the **root pass** depends on specific project requirements.
E7018 electrodes, particularly those with iron powder in their coating, offer high deposition efficiency. This means a larger percentage of the electrode's weight is deposited as weld metal, leading to faster welding speeds and increased productivity. High **weld deposition rate** is a key benefit.
Yes, E7018 is often specified for welding quenched and tempered steels due to its low-hydrogen characteristics and the excellent mechanical properties it imparts to the weld metal. These steels are particularly susceptible to hydrogen-induced cracking, making E7018 an ideal choice. It's a common **electrode for high-strength steel**.
The "70" in E7018 indicates the minimum tensile strength of the deposited weld metal, which is 70,000 pounds per square inch (psi). This numerical designation is a fundamental part of the AWS classification system. Understanding the **E7018 designation** helps in selecting the right electrode.
No, E7018 is known for producing very low spatter levels. This contributes to cleaner welds, reduces post-weld cleaning time, and improves overall efficiency. The minimal **welding spatter** is a significant advantage for finish quality.
While E7018 is an all-position electrode, it is generally not recommended for vertical down welding. Its puddle and slag are relatively fluid, making it challenging to control the molten metal in the vertical down progression. Vertical up is the preferred method for this electrode. For **vertical welding**, vertical up is standard for E7018.
E7018 electrodes are available in a range of common diameters, typically from 3/32 inch (2.4 mm) up to 1/4 inch (6.4 mm). The chosen diameter depends on the material thickness, joint design, and desired deposition rate. Selecting the correct **electrode size** is important for proper heat input.
The E7018 arc is smooth, stable, and relatively soft, allowing for excellent control of the weld puddle. This contrasts with the more forceful, digging arc of high-cellulose electrodes like E6010 or E6011. This **stable welding arc** contributes to the consistent quality of E7018 welds.
No, E7018 creates its own shielding gas from the decomposition of its flux coating, similar to all SMAW electrodes. Therefore, no external shielding gas is required. This makes it a highly portable and adaptable welding process. It's a key benefit of **stick welding**.
E7018's widespread use in critical industries stems from its unique combination of properties: low hydrogen content to prevent cracking, excellent mechanical strength and toughness, and consistent weld quality. These attributes ensure the integrity and reliability of fabricated structures. It's considered a **premium welding electrode** for high-integrity applications.
