Metallographic Investigation on Postweld Heat-Treated0.21%C-1020 Steel Plates Joined by SMAW Method

Table 3

Different parameters corresponding to tensile test.

Properties/Specimen	Air-cooled	Water-quenched	Oil-quenched	Sand-cooled
Tensile strength (MPa)	200	289	550 (175%↑ than air-cooled; 90%↑ than water-quenched; 66%↑ than sand-cooled)	332
Extension at tensile strength (mm)	0.7	0.2	0.5	1 (43%↑ than air-cooled; 400%↑ than water-quenched; 100%↑ than oil-quenched)
Load at tensile strength (N)	7214	10424	9013	11960 (66%↑ than air-cooled; 15%↑ than water-quenched; 33%↑ than oil-quenched)
Modulus of elasticity (MPa)	57551	69399 (20%↑ than air-cooled; 13%↑ than oil-quenched; 22%↑ than sand-cooled)	61344	57024