| Name: | steel billets |
| Length: | 6 meter |
| Size: | 60*60 mm,80*80mm,100*100mm, 120*120mm, 150*150mm |
| Grade: | Q235,Q275,Q345,3SP,5SP,20MnSi. |
| Shape: | Square |
| Technique: | Hot-Rolled |
| Standard: | EN/ASTM/JIS/GB |
| Bending | No more than 5mm in 1 meter No more than 30mm in 6 meter No more than 60mm in 12 meter |
| Chemical composition | C, Si, Mn, P, S, N, etc |
Chemical Properties:
Ladle Analysis: | ||
Designation | Carbon | Manganese |
| C15 | 0.12-0.18 | 0.30-0.60 |
| C18 | 0.15-0.21 | 0.30-0.60 |
| C20 | 0.17-0.23 | 0.30-0.60 |
| C15 MMn | 0.12-0.18 | 0.60-1.00 |
| C18 MMn | 0.15-0.21 | 0.60-1.00 |
| C20 MMn | 0.17-0.23 | 0.60-1.00 |
| C15 HMn | 0.12-0.18 | 1.00-1.50 |
| C18 HMn | 0.15-0.21 | 1.00-1.50 |
C20 HMn | 0.17-0.23 | 1.00-1.50 |
Billets of different designations are manufactured in three different grades namely A, B, C having sulphur, phosphorous content (on ladle analysis) and carbon equivalent as follows:
| Chemical Analysis: | |||
| Grade | Sulphur | Phosphorous | Carbon Equivalent (CE) |
| Max | Max | Max | |
| A | 0.05 | 0.05 | 0.42 |
| B | 0.045 | 0.045 | 0.41 |
| C | 0.04 | 0.04 | 0.39 |
