Prima

Leading manufacturers of all types of shielded metal arc welding electrodes, mig / tig and saw filler wire in india

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FAQ

Q. 1 What is Metal Recovery & how much is it for Prima 7018 (AWS: E7018) ?
Ans. Metal recovery is the ratio of weight of weld metal deposited to the weight of core wire melted. For Prima 7018 (AWS: E7018) metal recovery is 115% min.
Q. 2 What do you mean by Touch Electrode in Prima 6013 (AWS: E6013) ?
Ans. In cheaper electrode, usually welder faces a problem of arc striking or knocking of electrode before use, where as in Prima 6013 (AWS: E6013) can operate even with 50 OCV (Open Circuit Voltage) that is a special characteristic of "Touch & Start welding" without any hassle.
Q. 3 What is Hydrogen content & Impact Strength of Prima 7018 (AWS: E7018) ?
Ans. As per AWS standard Prima 7018 (AWS: E7018) fulfills H5 level of hydrogen that is hydrogen content less than 5 ml per 100 gms of weld metal. CVN Impact strength of Prima 7018 (AWS: E7018) is 80 Joules at -20° C.
Q. 4 Which is the electrode in Prima brand for welding of any two metals with unknown chemical composition (unknown dissimilar metals) ?
Ans. Prima HT Alloy 103 is the most recommended electrode for above application.
Q. 5 What is FN (Ferrite Number) in Stainless Steel Welding Consumables ?
Ans. It is the measure of Ferrite phase present in Austenitic stainless steel. Presence of ferrite also compensate drawbacks of sulphur, phosphorus & other impurities in stainless steel. Application where corrosion resistant is of primary importance, ferrite number should be minimum.

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