Quenched sample

Main structure

Average hardness (HRC)

Tensile strength

(N/mm²)

Percentage elongation

(%)

Percentage reduction in area

(%)

Izod impact value

(J/m)

Palm kernel oil quenched

Predominantly martensite

40.85

300

0.1

3.5

10.0

Cotton seed oil quenched

Martensite and lower bainite

33.25

350

0.4

2.5

10.5

Neem seed oil quenched

Martensite and lower bainite

12.5

550

0.4

3.5

15

Palm oil quenched

Martensite and upper bainite

13.8

480

0.3

3

14

Water quenched quenched

Predominantly martensite

47.45

250

0.2

2

3.0

SAE40 engine oil quenched

Mixture of martensite and lower bainite

20.75

450

0.2

5

12.0

As-received

Pearlite and Ferrite

10.2

565

8.0

15

30.0