Difference between LB and RB Welding Rods
LB is an E7016 grade low-hydrogen electrode for joints requiring toughness and a lower risk of cracking. RB is an E6013 grade rutile electrode that is easy to ignite, slag-free, and suitable for general fabrication and thin to medium-thin plate.
When to Choose RB E6013?
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General fabrication in the workshop with neat and fast targets
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Thin to medium plates that require heat control
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Daily repairs, tack welds, and stitch welding
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Situations that require an easy bow restart
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AC and DC machines with limited no-load voltage
When to Choose LB E7016?
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Steel structures that carry loads and require toughness
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Pipes, frames, pressure components and critical connections
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Projects requiring low hydrogen control
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Strict implementation of WPS and quality inspection
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Positive polarity DC or AC machines with adequate no-load voltage
Technical Comparison Table
| Aspect | RB E6013 | LB E7016 |
|---|---|---|
| Type of membrane | Rutile | Low hydrogen |
| Character arc | Easy to light, smooth, beginner friendly | Steady and focused connection quality |
| Spatter and slag | Low spatter, quick release of slag | Controlled spatter, slag requires disciplined cleaning |
| Welding position | All positions, vertical down are possible under the right conditions. | All positions, usually vertical up for control of results |
| Connection strength | Adequate for general fabrication | Higher with better toughness |
| Main application | General workshop, thin to medium plate | Structures, pipes, pressure components |
| Polarity | AC and DC | DC positive polarity and AC if OCV is adequate |
| Storage | Store dry in a closed container | Need humidity control, redry according to the guide |
| Typical current Ø 2.6 mm | Around 60 to 90 A | Around 70 to 100 A |
| Typical current Ø 3.2 mm | Around 90 to 130 A | Around 100 to 140 A |
| Typical current Ø 4.0 mm | Around 120 to 170 A | Around 130 to 180 A |
Note: Current range varies depending on brand, position, gap, and connection conditions. Perform a short test before production.
Conclusion
Ringkasnya, RB E6013 tepat untuk pekerjaan harian yang perlu kemudahan penyalaan, finishing rapi, dan kontrol panas pada pelat tipis sampai sedang, sedangkan LB E7016 dipilih saat sambungan menanggung beban dan menuntut ketangguhan serta kontrol hidrogen rendah. Tentukan pilihan berdasarkan beban desain, jenis material, posisi las, dan kapabilitas mesin. Jaga penyimpanan tetap kering untuk RB dan terapkan kontrol kelembapan serta redry sesuai panduan untuk LB. Selalu lakukan uji pendek dan ikuti WPS agar hasil konsisten. Butuh rangkuman semua varian? Lihat pilihan kawat las KOBE.
FAQs
When should you choose RB E6013?
Choose the RB for everyday workshop work, light repairs, tack and stitch, and when you need easy bow starts on thin to medium plates.
When should you choose LB E7016?
Choose LB for load-bearing structures, piping, compression components, or projects requiring low hydrogen control and stringent quality procedures.
Can these two types be used in all positions?
Both can be used in all positions. RB can be used on vertical descents with proper setup. LB is generally more stable on vertical ascents to maintain joint quality.
Does LB E7016 require re-drying?
Not always, but LB is sensitive to humidity. If the packaging has been open for a long time or the electrodes feel damp, dry them according to the manufacturer's instructions. RB should simply be kept dry in a closed container.
