LB-52 welding electrode Kobe Steel uses a low hydrogen iron powder type coating, which helps reduce the risk of hydrogen cracking and is suitable for welding thick metals.
AWS A5.1 E7016, EN ISO 2560-A-E 42 3 B, JIS Z3211 E4916
LB-52 welding electrode is a low hydrogen coated electrode type welding wire classified as AWS A5.1 E7016.
This electrode is designed for welding carbon steel and medium-tensile steel, especially in structures that require high strength and crack resistance.
With stable performance in all positions, LB-52 welding electrode produces smooth weld beads, good penetration, and easy-to-clean slag.
Suitable for structural applications such as bridges, pressure tanks, pipes, and heavy steel construction, LB-52 welding wire can also be used with both AC and DC+ currents, making it an ideal choice for welding needs in the field or in the fabrication shop.
The following are the advantages of the LB-52 electrode, namely:
Protected from hydrogen cracking
Low-hydrogen flux helps prevent hydrogen cracking. Suitable for “locked” joints and medium-strength steels.
Smooth arc, minimal spatter
The arc feels “calm,” the bead is neat, and burrs are significantly reduced. The end result is cleaner without drama.
Slag comes off easily
After cooling for a while, the slag peels off neatly. Multi-pass work remains fast and consistent.
Flexible engine: AC or DC+ (DCEP)
Whether you use an old-school transformer or a modern inverter—it's still stable. Practical for workshop work and field projects.
All-position including vertical-up
Difficult position? The LB-52 is still compliant. Suitable for structures that cannot be rotated.
Proven joint quality
Good fusion, low porosity, and good impact toughness. Suitable for standard work—from general fabrication to construction.
Easy restart
Cleaner restarts, minimizing arc strikes and minor defects at the connection points.
| Parameters | Description |
| Product Name | Welding Electrode LB-52 |
| Brand | KOBELCO |
| Electrode Type | Low hydrogen type covered electrode |
| Welding Electrode Size | 2.6 mm, 3.2 mm, 4.0 mm, 5.0 mm |
| Welding Process | SMAW |
| Weight Per Packaging | 20 Kg |
| Polarity | AC, DCEP |
Welding Electrode LB-52 is designed to produce high-quality welds with reliable tensile strength and mechanical properties in accordance with AWS standards.
With its smooth arc characteristics, minimal spatter, and easy-to-remove slag, this electrode ensures clean, neat, and strong welds.
Welding Electrode LB-52 KOBE supports welding in various positions (all-position welding) such as flat, horizontal, vertical, and overhead, and is suitable for use with AC or DC+ currents.
In addition, this welding electrode electrode provides ideal medium penetration for structural applications such as steel construction, bridges, pipes, and general fabrication, with good crack resistance in the final weld.
| Melting Point (MPa/ksi) | Tensile Strength (MPa/ksi) | Elongation (%) |
|---|---|---|
| 500 (72) | 570 (82) / 520 | 31 |
| 420 (61) | (75) | 33 |
| Impact value at -29°C (J) | PWHT |
|---|---|
| 120 | A.W. |
| 150 | 620°C × 1 jam |
| Ø mm | 1F, 1G, 2F, 2G | 3G (uphill), 4G |
| 2.6 | 55~85 | 50~80 |
| 3.2 | 90~130 | 80~120 |
| 4.0 | 130~180 | 110~170 |
| 5.0 | 180~240 | 150~200 |
| ABS | 3H10, 3Y, 3Y400 |
| LR | 3Ym, H15 |
| DNV | 3Y, H10 |
| BV | 3YH10 |
| NK | KMW53Y40, H10 |
| CR | 3Y, H10 |
Composition (total metal mass in %)
| Chemistry Value | Typical | Guaranty* |
| C | 0.08 | 0.15 |
| Si | 0.60 | 0.75 |
| Mn | 0.94 | 1.60 |
| P | 0.011 | 0.035 |
| S | 0.006 | 0.035 |
| Ni | 0.01 | 0.30 |
| Cr | 0.02 | 0.20 |
| Mo | < 0.01 | 0.30 |
| V | 0.01 | 0.08 |
| Others (**) | 0.98 | 1.75 |
Notes :
(*) single value is maximum
(**) combined limit for Mn + Ni + Cr + Mo + V
| diameter (mm) | length (mm) | g/piece | carton (mm) |
|---|---|---|---|
| 2.6 | 350 | 20 | 170W, 110H, 380L |
| 3.2 | 350 | 31 | 170W, 110H, 380L |
| 4.0 | 400 | 54 | 170W, 110H, 430L |
| 5.0 | 450 | 97 | 170W, 110H, 480L |
Notes:
kg/pack = 5 kg for all sizes.
kg/carton = 20 kg for all sizes.
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ISO 9001:2015
ISO 14001:2015
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