Effect of Alloying Composition on Microstructure and Mechanical Properties of Ultranarrow Gap Welded Joints of U71Mn Rail Steel

Table 4

Charpy impact energy (Ak) of U71Mn ultranarrow rail welds.

T (°C)	Formulation 2 weld (AKU/J)			Formulation 3 weld (AKU/J)
	1	2	Average	1	2	Average
20	95.5	86.5	91	67.9	57.5	62.7
0	88.6	80.4	84.5	52.4	66.3	59.35
−20	84	70.6	77.3	55.8	48.8	52.3
−40	73.4	69.3	71.35	36.1	38.5	37.3
−60	52	38.5	45.25	14.5	14.1	14.3
−80	37.5	55	46.25	14.1	14.9	14.5