NAHAVIWEL Welding Electrodes NB-421

WELDING ELECTRODE NAHAVIWEL NB-421

1. About NB- 421

Welding electrode brand NB-421 is high quality, less smoke, stable arc, less spatter, easy-removal slag, deep penetration, beautiful bead, suitable with all position.

2. Applications and Usage instructions:

The product ranges are best suited with low carbon steel and low alloy steel structures, such as: shipbuilding, barge, high-pressured tank, pre-fabricated engineering, machine parts, bridges, etc.

3. Safety alert:

Smoke and gas can harm your health. Arc ray can cause irritation for eyes or burning skin. Electrical shock can kill. Welders are seriously advised to wear fully protective gear and not to touch on-going electrical devices.

Humid sticks can generate more smoke, more spatter, un-stability, porosity.

Better preheat products at 100⁰ C – 150⁰ C before welding.

1.Standard

- AWS 5.1-E6013

- JIS Z 321-E4313

- TCVN 3223:2000 E431

Approved by Vietnam Register: QCVN 64-2015/BGTVT – MW1/KMW1; QCVN 65-2015/BGTVT

2. Diameter & welding current (AC&DC)

Note: F (Flat), FW (Fillet Weld), VU (Vertical Upward), H (Horizontal), OH (Overhead).

3. Mechanical properties of the weld metal:

4. Chemical composition of the weld metal: