7014 vs 7018 welding rod
When it comes to welding mild steel or low to medium carbon steel, two of the most popular electrodes that come to mind are E7014 and E7018.
Both of these electrodes are for stick welding or shielded metal arc welding (SMAW). However, there are some key differences between these two rods that make them better suited for certain applications & give them special features.
In this blog post, we will take a closer look at the similarities and differences between E7014 and E7018 welding rods, and help you to determine which one is the best choice for your specific welding need.
7014 vs 7018 Specification
E7014 and E7018 welding rods are both types of shielded metal arc welding (SMAW) electrodes, which are used for welding low carbon steel. Both of these electrodes are covered by the AWS A5.1 specification, which covers carbon steel electrodes for shielded metal arc welding.
Read more: Different versions of E7018 Welding Rod:
7014 vs 7018 Chemical Compositions
Both E7014 and 7018 has similar chemical compositions except that 7018 has a higher Manganese content of 1.60% but a lower silicon content of 0.75% compared to 7014 (Manganese-1.25% & Silicon-0.90%).
Complete chemical compositions comparison of 7014 and 7018 welding rod are given in the below table as required by AWS A5.1 specification.
|Chemical Element||E7014 Composition (%)||E7018 Composition (%)|
|Carbon (C)||0.15 max||0.15 max|
|Silicon (Si)||0.90 max||0.75 max|
|Manganese (Mn)||1.25 max||1.60 max|
|Sulfur (S)||0.035 max||0.035 max|
|Phosphorus (P)||0.035 max||0.035 max|
|Nickel (Ni)||0.30 max||0.30 max|
|Chromium (Cr)||0.20 max||0.20 max|
|Molybdenum (Mo)||0.30 max||0.30 max|
|Vanadium (V)||0.08 max||0.08 max|
|Total of Mn+Ni+Cr+Mo+V||1.50 max||1.75 max|
7014 vs 7018 Tensile Strength & Mechanical Properties Comparison
both E7014 and E7018 welding rods have similar tensile and yield strength. However, E7018 has a higher elongation of minimum 22% compared to E7014 which has a minimum elongation of 17%.
While 7018 welding rod has a weld toughness requirement of 15 ft·lbf at –20°F (20 J at –30°C), toughness requirements for E7014 welding rod are not specified in the AWS A5.1 specification.
|Property||E7014 Value||E7018 Value|
|Tensile Strength||70 Ksi (490 MPa) min||70 Ksi (490 MPa) min|
|Yield Strength||58 Ksi (400 MPa) min||58 Ksi (400 MPa) min|
|Elongation||17% min||22% min|
|Toughness||Not specified||15 ft·lbf at –20°F (20 J at –30°C),|
7014 vs 7018 Polarity
E7014 and E7018 welding rods have different polarity. E7014 electrode is typically used in the DC+ (Direct Current Electrode Positive), DC- (Direct Current Electrode Negative), & AC polarity. On the other hand, E7018 electrode is typically used in the DCEP (Direct Current Electrode Positive) & AC polarity only.
In summary, E7014 can be used with all welding polarity while 7018 is used only with DCEP and AC polarity.
7014 vs 7018 Coating difference
- E7014 and E7018 welding rods have different coatings.
- E7014 electrode coating is made of titania with added iron powder.
- E7018 welding rod coating is made of low hydrogen potassium with added iron powder.
7014 vs 7018 Welding Positions
E7014 and E7018 welding rods can be used for welding in all positions, but they are known to perform better in certain positions. The third digit “1” in both rods mean that they can be used with all position welding applications for pipe, plate or any other material form.
7014 vs 7018 Slag Characteristics
E7014 electrode is known for its good bead appearance and easy slag removal. The slag created by E7014 is easily removed by using a chipping hammer or wire brush. This electrode is typically used for welding in all positions and for creating a good bead appearance.
E7018 electrode is known for its deep penetration and high strength. The slag created by E7018 is more difficult to remove than that created by E7014. The slag is harder, thicker, and more tenacious than the slag created by E7014.
This electrode is typically used for welding in all positions, and for high strength and deep penetration. A complete summary of Differences between E7018 and E7014 welding rods are:
|AWS Specification||AWS A5.1||AWS A5.1|
|Coating types||Low hydrogen Potassium with added Iron Powder||Iron Powder titania
|Tensile & Yield Strength (Ksi)||70 & 58|| 70 & 58
|Polarity||AC, DCEP||AC, DCEN & DCEP|
|Weld penetration||Medium||Low to Medium|
||Medium, very easily removable slag
|Arc features||Smooth arc||smooth, quiet arc|
|Application||Fillet, fill & cap passes||high deposition applications|
7014 vs 7018 Applications
E7014 electrode is typically used for welding in all positions and for creating a good bead appearance and easy slag removal.
The main applications of E7014 welding electrode are:
- Construction, shipbuilding, and maintenance and repair work.
- Welding low carbon steel.
- Repair and maintenance of equipment.
- Construction of new equipment.
E7018 electrode is typically used for welding in all positions, and for high strength and deep penetration. It is commonly used for welding low carbon steel and for applications such as structural steel fabrication, pressure vessels, and heavy equipment repair.
E7018 is also used in the fabrication of bridges, buildings, and other structures that require deep penetration and high strength. E7018 welding rod is known for its deep penetration and high strength, which makes it well-suited for the following applications:
- Welding in flat and horizontal positions.
- Structural steel fabrication.
- Pressure vessels.
- Heavy equipment repair.
- Fabrication of bridges, buildings, and other structures that require deep penetration and high strength.
- Welding low carbon steel.
- All position welding.
- E7014 Welding Rod
- Sizes of welding rods & Amperage Chart
- Stick Welding Polarity
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