1,Size of Hot rolled carbon steel round bar

Round bar

Diameter(mm)

Length (mm)

20~800

3000~9000

Plate

Thickness(mm) 

Width (mm)  

Length (mm)   

Max:800

Max:2200

Max:9000

The specification can be customized.

 2,Chemical Compositons

Grade

C

Si

Mn

P

S

Cr

Cu

Ni

45

0.42-0.50

0.17-0.37

0.50-0.80

≤0.035

≤0.035

≤0.25

≤0.25

≤0.30

S45C

0.42-0.48

0.15-0.35

0.60-0.90

≤0.030

≤0.035

-

≤0.30

≤0.20

C45

0.42-0.50

≤0.40

0.50-0.80

≤0.045

≤0.045

≤0.40

-

≤0.40

1045

0.43-0.50

0.15-0.35

0.60-0.90

≤0.040

≤0.050

-

-

- 

3,Features of C45 steel

1, Medium carbon structural steel

2, High strength and machinability

3, Good toughness, plasticity and abrasion resistance

4, Typically used in quenched and tempered or normalized conditions

4,Typical Applications 

1, Widely used in machine manufacturing

2, For shaft parts  

3, Stamping die drawing parts repair and hardfacing