Since Oscar Kjellberg's invention of the covered welding electrode in 1904, ESAB has played an integral part in the discovery and development of more commonly accepted welding processes than any other company.
ESAB's Knowledge Center contains a vast amount of information for the welder, the engineer, the welding inspector and the project manager.
Welding stainless steels and nickel alloys is all about cleanliness and choosing the right filler metal. These guidelines are intended as a step-by-step aid to the successful welding of stainless steels and nickel alloys.
Step 1: Selection of Filler Metal Alloy for Welding ProcessWhen both base metals are the same, use the base metal alloy as a guide. For example, if joining 316L to 316L, use 316L filler metal. Past experience may show preferential corrosion in the weld, in which case, moving up in alloy content may be required. Careful consideration regarding how far to move up is necessary, so as not to over-alloy causing galvanic corrosion.
For dissimilar joint welding (example; Stainless ...
The tables are guides for choosing the correct welding consumable when welding similar or dissimilar materials. If the materials you need to join are not on the list, please contact us.
Joining Similar Materials The table gives typical selections of welding consumables and basic designations for wire electrodes and filler wire/rods. It does not indicate the silicon-alloyed variants used for MIG welding or the variants of covered electrodes or wire-flux combinations for submerged arc welding.
Exaton Welding Consumable
Normal choice 1
Over-alloyed choice 1
By carefully selecting raw materials and optimizing manufacturing conditions the Exaton fluxes have guaranteed as-delivered moisture content from the factory.
Normally, the fluxes are delivered in steel drums, each containing 25 kg (55 lbs). Each pallet has a net weight of 500–1000 kg (1100–2200 lbs) and is shrink wrapped in plastic or packed in wooden crates before delivery from the factory.
To maintain the as-delivered moisture content, as long as possible, the handling and storage of the flux must be done according to the following requirements.
Transportation of the flux must be done in covered vehicles.
Unbroken pallets must be shrink wrapped in plastic or kept ...
Problem Cause Solution Cracking centerline Excessive dilution Add more filler metal or use technique to achieve slightly convex weld bead. Check dissimiliar joining chart to make sure correct filler material is being used. Cracking Random Overstressed weld Lower amperage or voltage or increase travel speed to lower heat input, which causes distortion. Use step welding technique, change joint design. Keep the interpass temperature below 150°C (300°F). Cracking HAZ Usually base metal related Ensure not welding with machinable grade of material containing high levels of low melting intermetallics. Porosity Poor gas ...
Basicity is commonly used to describe the metallurgical behavior of a welding flux. The basicity index is a ratio between basic and acid compounds (oxides and fluorides) of which the flux is composed.
There are several ways of calculating basicity and in welding Boniszewski's formula has become the predominant way of calculating basicity.
Welding fluxes can be divided into three groups: Type of welding flux Basicity Acid fluxes <0.9 Neutral fluxes 0.9 - 1.2 Basic fluxes >1.2 Basicity ...
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For course overviews and details on training sessions offered, check out our training calendar.