JOURNAL OF THE JAPAN WELDING SOCIETY

Two methodes are proposed to test crackability of electrodes for structural steels. Test pieces are shown rn Figs 1 and 4 respectively 1st method is a crack test by fillet welding and 2nd method by fixed V joint welding. Correlations are found between their test results
It has been experienced that electrodes which passed these tests ate free from cracks ih practical shop welding

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Though Cr-Mn austenite steel containing silicon and vanadium is a steel which can be used for 18-8 Cr-Ni austenite steel, ist weidability has not yet been studied.
The authors studied the effects on the weldability of Cr-Mn austenite steel and also those on composition and structure of welded joints, exerted by various materials, commonly used in coating, such as CaF₂, CaCO₃, MnO₂, MnCO₃, TiO₂, Na-titanate, K₄[Fe(CO)₃], starch and ferro-mmanganese, useing welding rod of following composition ;
0.44% C, 0.71% Si., 16.16% Mn, 11.12% Cr and 0.72% V.
After many experiments the authors select the following as abest coating ;
28.6% CaF₂, 21.4% CaCO₃, 10% MnO₂, 10% Na-titanate, 2% starch, 10% ferro-manganese, 5% K₄[Fe(CO)₆] and 13% wateraglass.
Cr-Mn steel plates containing 0.20% C, 1.22% Si, 17.60% Mn, 13.18% Cr and 0.66% V are arc welded under different conditions by using welding rod.
Tensile, hardness and macao-structural tests of the welded joints prepared as above was undertaken.

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