Astro 290 Special Electrode

Description

GENERAL CHARACTERISTICS:

Astro 290 is capable of welding all types of stainless steel, in any position. This versatile rod has been specially developed to resist chemical ‘pitting’ action.

Engineered for: Stabilised stainless steel tank for chemical corrosion resistance.

TYPICAL APPLICATIONS:

Joining, fabricating, cladding and repair of tanks and other structures, subjected to corrosive ‘pitting’ action of the chemicals, commonly encountered in rayon and dye manufacturing plants and paper mills.

FEATURES:

• SPECIAL PROPERTIES WITHIN THE COATING OF 290 FLUXES THE IMPURITIES FROM THE WELD METAL
• ELIMINATES THE FORMATION OF CHROMIUM CARBIDES IN THE WELD METAL
• ALL POSITION WELDING CHARACTERISTICS
• EASY REMOVAL OF SLAG
• HIGH ELONGATION
• HIGH TENSILE
• QUICK FREEZING

QUALITIES:

• Tensile Strength: Up to 95,000 P.S.I. (640 MPa)
• Yield Sterength: Up to 75,000 P.S.I. (510 Mpa)
• Elongation: 40 to 50%
• Deposit: Nonmagnetic

WELDING PROCEDURES:

Clean base metal before welding. When welding materials 4mm (3/16″) or thinner, a square butt joint should be used with a 1.5mm (1/16″) gap; on material thicker than 4mm (3/16″), a beveled edge is recommended.

A minimum of welding current should be used.

Maintain a short arc with the electrode angled slightly in the direction of travel.

Stringer beads are recommended with a fairly fast travel speed.

Slag should be permitted to remain on the weld deposit until it has cooled.

Avoid overheating the base metal and completely remove slag between passes.