Name

Grade

(mm)Diameter

Standard

Application

Status on Delivery

Remarks

High Quality Carbon Structure Steel

45

14-50

GB/T699-1999

GB/T702-2008

Mainly utilized in the cold, hot cutting process for shaft products, as well as in the construction engineering structure.

Hot Rolled

50

55

Common Carbon Structure Steel

Q195

10-45

GB/T700 –2006

Construction and Machine Manufacture

Q215

Q235

Grade

Chemical Contents %

C

Si

Mn

P

S

45

0.42~0.50

0.17~0.37

0.50~0.80

≤0.035

≤0.035

50

0.47~0.55

0.17~0.37

0.50~0.80

≤0.035

≤0.035

55

0.52~0.60

0.17~0.37

0.50~0.80

≤0.035

≤0.035