Chemical Component of Material SAE1020 (%)

C: 0.17-0.24

Si: 0.17-0.37

Mn: 0.35-0.65

S: max 0.035

P: max 0.035

Cr: max 0.25

Ni: max 0.30

Cu: max 0.25

Mechanical Properties:

Ultimate tensile strength(minimum): 390Mpa

Yield strengths(minimum): 245 Mpa

Elongation(minimum):20%

Chemical Component of Material SAE1045  (%)

C: 0.42-0.50

Si: 0.17-0.37

Mn: 0.50-0.80

S: max 0.035

P: max 0.035

Cr: max 0.25

Ni: max 0.30

Cu: max 0.25

Mechanical Properties:

Ultimate tensile strength(minimum): 590Mpa

Yield strengths(minimum): 335 Mpa

Elongation(minimum):14%

Chemical Component of Material ST52  (%)

C: 0.12-0.20

Si: 0.20-0.60

Mn: 1.20-1.60

S: max 0.030

P: max 0.030

Cr: max 0.0025

Mo: max 0.0025

V: max 0.0025

Mechanical Properties:

Ultimate tensile strength(minimum): 470Mpa

Yield strengths(minimum):    345 Mpa

Elongation(minimum):21%