Product Definition
E7018 H4R is a low hydrogen type, stable coating DC or AC electrode designed for welding in all positions .
It has excellent welding performance and mechanical properties and is suitable for a variety of welding scenarios.
Product characteristics
- Arc stability: The arc is soft, easy to operate in the puddle, and the smooth arc transmission makes the welding process more stable and controllable.
- Good weld formation: It has excellent toe wettability, which can shorten the holding time, the weld surface is flat, and the appearance quality is good.
- Strong moisture resistance: No zinc is deliberately added to prevent moisture, and it has good moisture resistance.
- Wide range of application: It is suitable for a variety of welding positions, except for vertical downward welding, other positions can be used.
- Good low-temperature toughness: It has good low-temperature toughness and is suitable for welding in low temperature environments.
Mechanical properties
| Item | Indicator |
| Tensile Strength (Rm) | ≥420 MPa |
| Yield Strength (Rel) | ≥330 MPa |
| Elongation (A) | ≥17% |
| Impact work (KV2, room temperature) | 50-80 J |
| Impact work (KV2, 1℃) | ≥52 J |
Chemical composition (%)
| Item | C | Mn | Si | P | S | Ni | Cr | Mo | V |
| Requirements | ≤0.10 | 0.80~1.60 | ≤0.75 | ≤0.030 | ≤0.030 | ≤0.03 | ≤0.20 | ≤0.30 | ≤0.08 |
| Example Value | ≤0.10 | 0.80~1.60 | ≤0.75 | ≤0.030 | ≤0.030 | ≤0.03 | ≤0.20 | ≤0.30 | ≤0.08 |
Application
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Usage Guide
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2. Preparation Before Welding: Remove water, dirt, oil, etc. on the surface of the base metal before welding to prevent cracks and pores. |
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3. Welding Operation: The back-and-forth method should be used to prevent pores or pits at the arc initiation point. The arc length should be kept as short as possible during welding, and the swing amplitude should not exceed 3 times the diameter of the electrode |
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Notes
- Storage Conditions: Due to its low hydrogen characteristics, E7018 H4R welding rods need to be stored in a dry environment to prevent moisture.
- Welding Parameter Selection: When using, the appropriate welding current and voltage should be selected according to the specific welding materials and environmental conditions.
FAQ
Q: What is 7018 H4R welding rod used for?
A: E7018 H4R welding rod has a wide range of uses and is commonly used in various fields of industrial manufacturing, such as welding of pipelines, boilers, pressure vessels, structural parts and engineering machinery, to ensure welding quality and joint performance.
Q: What welding positions are suitable for E7018 H4R electrode?
A: Applicable to other positions except vertical downward welding, including flat welding, vertical welding, horizontal welding, etc.
Q: Can welding rods still be used after getting wet?
A: If the welding rod is damp, it must be dried again to the specified temperature and time before use, otherwise the welding quality will be affected.
How To Order
| TYPE： | E7018 H4R | E7018 H4R | E7018 H4R |
| Material： | CARBON STEEL WELDING ROD | CARBON STEEL WELDING ROD | CARBON STEEL WELDING ROD |
| Size : | Diameter:2.4 mm 3.2 mm 4 mm | Diameter:2.4 mm 3.2 mm 4 mm | Diameter:2.4 mm 3.2 mm 4 mm |
| Length:350mm,etc | Length:350mm,etc | Length:350mm,etc | |
| Torelance: | (-0.04/-0.01)mm | (-0.04/-0.01)mm | (-0.04/-0.01)mm |
| Packing: | 1kg,2.5kg,5kg/inner box | 20kg/carton | 1000kg/pallet |
| M.O.Q: | 1ton | 1ton | 1ton |
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