HOW ARE MAGNA WELDING ALLOYS DIFFERENT?
	While technical details are given below it is important to explain the CONCEPT which led to the development of maintenance engineered MAGNA welding alloys. There is rarely a difference between “production welding alloys and maintenance welding alloys”. Using base metal analysis is the basis of welding, and technically correct UNTIL one is faced with a component that has been subjected to IMPACT, HEAT, SHOCK, VIBRATION, and years of service. Finally when this WORN part which may also be rusted and OIL soaked needs WELD REPAIR then a simple BASE METAL matching alloy WILL NOT WORK!! A SPECIAL WELDING ELECTRODE is required that will OVERCOME the problems associated with this kind of salvage. Further when using MAGNA welding alloys for salvage, you can be sure of a reliability that makes the weld repair a PERMANENT SOLUTION! PERMAWELD has TWO decades of experience in: salvage of critical and difficult to weld components, joining different base metals and welding unknown base metals. Click here to see critical weld repairs undertaken with Magna Please send your technical query for weld repair with Magna…. Click here.

Magna welding products contain RARE EARTH COMPOUNDS, SPECIAL ALLOYING ELEMENTS, OXIDIZERS & STABILIZERS. These are engineered to prevent cracking problems when salvaging of critical components. They compensate for the transformation of the electrode composition during the critical melting and re-solidification phase

MAGNA conducts continuous extensive research in electrode coating chemistry and electrode coating technology. MAGNA employs leading scientists and many highly qualified chemists and technicians who perform studies in electrode coating technology. Among the reasons for MAGNA Maintenance Welding superiority is the advanced state of MAGNA’s Maintenance Electrode flux coating technology. It is believed that the flux coatings of MAGNA electrodes are the most advanced in the world with respect to maintenance applications. MAGNA electrode coatings contribute to maintenance weld quality in many special ways, including -

MAGNA's unique flux coatings deoxidize the weld metal. Oxygen contamination is a major cause of weld failure. MAGNA electrodes contain special deoxidizers which completely remove most oxygen and reduce the balance to exceedingly finely dispersed inclusions. The deoxidizer system is of a proprietary and special nature not universally available.

MAGNA flux coatings actually produce a super shielding gas to protect the molten weld metal. This gas envelope produced by the melting of the coatings is especially designed to prevent the weld from being contaminated by nitrogen, oxygen, hydrogen and other harmful elements that often cause failure in ordinary electrode deposits.

Pore-resistant flux coatings. MAGNA electrode coatings contain scavengers, cleansers, degreasers, and have an ability to absorb foreign matter, dirt, contamination, and impurities, float them away and hold them in the slag for easy removal. This special feature enables MAGNA maintenance welds to be made without the porosity that is common with ordinary electrodes.

The MAGNA slag blanket. MAGNA Maintenance Electrodes provide a slag layer around the molten metal globules during transfer, and this protective chemical slag blanket covers the weld deposit. In most electrodes, the slag is usually little more than a residue of the electric welding process. MAGNA Maintenance Electrodes have a completely different type flux coating which forms a protective blanket that not only provides resistance to oxidation and other contaminants but emphatically retards the cooling rate. A “Windmanstatten” structure occurs when ordinary electrodes are used which allow the weld to cool too rapidly. The “Widmanstatten” structure caused by rapid cooling is very harmful as it causes the ferrite to form needle-like plates which are transverse to the pearlite. This makes the deposit prone to cracking, gives poor bonding and makes it difficult for machining etc.

The MAGNA slag blanket holds the heat and retards the cooling to permit the complete precipitation of the ferrite in the grain boundaries in such a way that the ferrite surrounds the pearlite grains. The final weld deposit is a more refined and more desirable grain structure that provides long term service exceeding the properties of the base metal!

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