Here is detailed information on some commonly used welding rods, especially E7018, E6013, E7018 B2, and other widely used types in welding:
7018 Welding Rod Specification
E7018 welding rod specification
7018 electrode properties
7018 welding rod meaning
7018 rod tensile strength
Low hydrogen welding electrode
E7018 welding rod datasheet
7018 rod polarity and amperage
7018 welding rod uses
7018 welding rod current settings
SMAW 7018 electrode
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- पाइप फिटिंग के प्रकार और उनके उपयोग (25 पाइप फिटिंग नाम और विवरण)
- Pipe ID, OD, CF, and Thickness Table Format
- Type of welding
🔧 1. E7018 Welding Rod
➤ Overview:
E7018 is a low-hydrogen, iron powder, heavy-coated electrode used for shielded metal arc welding (SMAW) or stick welding.
➤ Meaning of E7018 (AWS Classification):
- E = Electrode
- 70 = 70,000 psi tensile strength
- 1 = All positions (flat, vertical, overhead, horizontal)
- 8 = Low hydrogen, iron powder coating (AC or DCEP polarity)
➤ Key Features:
- High strength welds (70,000 psi)
- Low hydrogen reduces risk of cracking
- Suitable for structural steel, bridges, buildings
- Strong arc with smooth bead appearance
- Requires dry storage—moisture causes weld defects
➤ Typical Applications:
- Structural welding (bridges, buildings)
- Heavy fabrication
- Pressure vessels and pipelines
- Shipbuilding
- Power plants
➤ Welding Current:
- Polarity: AC or DCEP (Direct Current Electrode Positive)
- Amperage: Depends on rod diameter
- 3/32” (2.5 mm): 70–110 A
- 1/8” (3.2 mm): 110–160 A
🔧 2. E6013 Welding Rod
➤ Overview:
E6013 is a rutile-coated electrode that produces a smooth, stable arc and easy slag removal. Often preferred by beginners.
➤ Meaning of E6013:
- E = Electrode
- 60 = 60,000 psi tensile strength
- 1 = All positions
- 3 = Rutile base flux (AC, DCEN, or DCEP)
➤ Key Features:
- Soft, stable arc
- Smooth bead, low spatter
- Easy to strike and re-strike
- Slag peels off easily
- Ideal for light- to medium gauge metals
➤ Typical Applications:
- Sheet metal work
- Auto body welding
- Furniture and appliance manufacturing
- General maintenance
- DIY/home projects
➤ Welding Current:
- Polarity: AC, DCEN, or DCEP
- Amperage:
- 3/32” (2.5 mm): 40–90 A
- 1/8” (3.2 mm): 90–140 A
🔧 3. E6011 Welding Rod
➤ Overview:
E6011 is a cellulose-coated rod used for deep penetration and can burn through rust, paint, or dirty metals.
➤ Meaning:
- E = Electrode
- 60 = 60,000 psi
- 1 = All positions
- 1 = Cellulose potassium coating (DC or AC)
➤ Key Features:
- High penetration
- Fast freezing slag – good for vertical/uphill welds
- Can be used on rusted or dirty materials
- Used in farming, repair, pipe welding
🔧 4. E7016 Welding Rod
➤ Similar to E7018 but with lower iron powder content.
- Requires more skill
- Used in structural welding
- Also low hydrogen type
- AC or DCEP
🔧 5. E7024 Welding Rod
➤ For flat or horizontal welding only
- High deposition rate
- Heavy iron powder coating
- Not suitable for vertical or overhead
🔧 Comparison Table
| Electrode | Tensile Strength | Welding Position | Polarity | Arc Characteristics | Applications |
|---|---|---|---|---|---|
| E7018 | 70,000 psi | All | AC/DCEP | Smooth, low spatter | Structural, heavy-duty |
| E6013 | 60,000 psi | All | AC/DCEN/DCEP | Soft arc, easy to use | Light fabrication |
| E6011 | 60,000 psi | All | AC/DCEP | Deep penetration | Dirty/rusty metal |
| E7024 | 70,000 psi | Flat/Horizontal | AC/DCEP | High deposition | Plate, high-speed welding |
| E7016 | 70,000 psi | All | AC/DCEP | Low hydrogen | Structural |
🔒 Storage Tips (especially for low hydrogen rods like E7018 & E7016):
- Store in dry oven (250°F–300°F)
- Avoid moisture contamination—leads to hydrogen cracking
- Re-bake if exposed to air too long
🔧 E7018-B2 Welding Electrode – Detailed Information
➤ Classification Meaning (AWS A5.1/A5.5 Standard):
- E = Electrode
- 70 = Minimum tensile strength of 70,000 psi
- 1 = Usable in all welding positions
- 8 = Low-hydrogen potassium, iron powder type coating
- B2 = Indicates a Chromium-Molybdenum (Cr-Mo) alloy in the weld deposit
- Contains approximately 1.25% Chromium (Cr) and 0.5% Molybdenum (Mo)
🔍 Chemical Composition of Weld Metal (Typical):
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.05 – 0.12 |
| Manganese (Mn) | 0.50 – 1.00 |
| Chromium (Cr) | 1.00 – 1.50 |
| Molybdenum (Mo) | 0.40 – 0.65 |
| Silicon (Si) | ≤ 0.80 |
| Phosphorus/Sulfur | ≤ 0.035 |
🔩 Mechanical Properties (Typical):
| Property | Value |
|---|---|
| Tensile Strength | ≥ 70,000 psi (490 MPa) |
| Yield Strength | ≥ 58,000 psi (400 MPa) |
| Elongation | ≥ 20% |
| Impact Toughness (Charpy V-notch) | 27 J @ -30°C typical |
🔥 Applications of E7018-B2 Rod:
Used primarily in applications that demand high strength and creep resistance at elevated temperatures.
✅ Common Applications:
- Power plant piping and boiler tubes
- Petrochemical industry
- Oil & gas industry (refineries)
- Pressure vessels and heat exchangers
- High-temperature steam lines
⚙️ Welding Parameters:
| Rod Size (mm) | Amperage (AC or DCEP) |
|---|---|
| 2.5 mm (3/32”) | 70 – 110 A |
| 3.2 mm (1/8”) | 100 – 160 A |
| 4.0 mm (5/32”) | 140 – 200 A |
| 5.0 mm (3/16”) | 180 – 260 A |
- Polarity: DCEP (preferred), but AC can also be used
- Preheat: Required, depending on base material (typically 150–300°C)
- Interpass temperature: Controlled to avoid cracking (~200–300°C)
- Post-weld heat treatment (PWHT): Often required for stress relief
📦 Storage Guidelines:
- Critical to store in a dry oven at 250°F–300°F (120°C–150°C)
- Redry electrodes at 650°F (340°C) for 1 hour if exposed to air
- Use immediately after removal from the oven to prevent hydrogen pickup
⚠️ Important Notes:
- E7018-B2 is not for general structural welding
- Always match it with 1.25Cr-0.5Mo base metals (like ASTM A335 P11, A182 F11, A217 WC6, etc.)
- Consult Welding Procedure Specification (WPS) for preheat/PWHT based on job
