Steel No.

Process

Heat treatment condition

Retained Austenite, %

Mechanical properties measurements

Temp.

˚C

Time,

hr

Y.S (MPa)

U.T.S (MPa)

Elong., %

Reduction of area, %

M3

IF

400

1

1

1211

1225

15

45.5

ESR1

425

2

7.1

1224

1239

13.7

63.3

ESR2

425

2

7.6

1327

1334

14.1

53

ESR3

425

4

1.9

1114

1149

11.7

45.5