Frequently Asked Questions
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What is Metal Recovery & how much is it for Prima 7018 (AWS: E7018) ?
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.
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What do you mean by Touch Electrode in Prima 6013 (AWS: E6013) ?
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.
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What is Hydrogen content & Impact Strength of Prima 7018 (AWS: E7018) ?
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.
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Which is the electrode in Prima brand for welding of any two metals with unknown chemical composition (unknown dissimilar metals) ?
Prima HT Alloy 103 is the most recommended electrode for above application.
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What is FN (Ferrite Number) in Stainless Steel Welding Consumables ?
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.
