Name

Cold drawn,hot rolled Hexagonal steel

Material Grade

Q235,20Cr,40CR

Sizes range

8mm-80mm

Tolerance

1-2% tolerance,small tolerance

Length

3M,5.8M or 6M

Surface

Black,bright

Test

Squash test, Extended test, Water pressure test, Crystal rot test, 

Heat treatment, NDT

Chemical composition of materials

Chemical composition

Q235

20#

40#

C

0.14~0.20%

0.17~0.23

0.37~0.45

Mn

0.30~0.65

0.35~0.65

  0.50~0.80

S

≤0.050

≤0.035

  ≤0.035

P

≤0.045

≤0.035

  ≤0.035

Si

≤0.30

0.17~0.37

 0.17~0.37

Mechanical    Property

Tensile Strength

380~400

≥410

≥580

Yield Strength

235

≥245

    ≥335

Extension

26%

≥25

    ≥19