Submarine Manufacturing & Products Limited

The Barracuda general-purpose mild steel electrodes (nearest equivalent E6013) comprises of a silicone free C/Mn core wire with a thick rutile alumina silicate flux coating. The waterproof coating is of a polyester resin material, which ensures complete sealing of the outer flux covering, thereby, ensuring the maximum resistance to moisture penetration. As well as enabling the maximum moisture resistance to be achieved, the electrode also allows for higher levels of misuse in its handling and care, and provides electrical insulation for improved diver safety. The packaging is designed so as to maximise shelf life to the full.

The electrode has a particularly smooth, soft arc characteristic that welders find very pleasing to use. The electrode produces a superb weld finish and the slag is easily removed. It offers easy striking and restriking and may be used in all positions. The electrode provides for excellent mechanical properties.

WELD METAL PROPERTIES
Mechanical Analysis

Tensile Strength (N/mm.sq.): Dry, 540. Wet, 564.
Elongation on 4d: Dry, 26%. Wet, 10%.
Reduction of Area: Dry, 70%. Wet, 47%
Charpy Impact Energy @ (0 deg. C): Dry, 62J. Wet, 34J.

Chemical Analysis - Deposited Weld Metal Analysis

Carbon (C): Typical (dry) 0.05%
Manganese (Mn): Typical (dry) 0.5%
Silicon (S): Typical (dry) 0.45%
Sulphur (S): Typical (dry) 0.025%
Phosphorous (P): Typical (dry) 0.025%

WELDING PARAMETERS

Electrode Dia: 3.2mm, 4.0mm & 5.0mm

Electrical Characteristics
Current Type: DC only
Polarity: DCSP (-Ve) or DCRP (+Ve)
Amps: 3.2mm, 90-145 (165 max). 4.0mm, 130-220 (240 max). 5.0mm, 240-290 (310 max).
Volts: (OCV) 80 (max)

RECOMMENDED WELDING TECHNIQUES
The welding techniques we recommend for underwater wet welding are touch technique, of which, there are essentially three variations:
Drag
Oscillation
Step-back

We recommend that all underwater wet welding should be carried out using DCSP. However the electrode will also perform satisfactorily on DCRP should this be necessary. In addition, a circuit breaker should be fitted into the welding circuit to allow for safe isolation. This may be either dual pole or single pole. The use of double insulated welding cables and a suitably insulated electrode holder is also required. The use of the Piranha weld control unit is recommended, as it also provides essential welding parameter information and offers fault finding capabilities for the welding plant and welding circuit.