China · YB
45B
YB/T 037:2005 — Quality structure cold-draw flat steels
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| B | 0.0005 | 0.0035 | ||
| C | 0.42 | 0.49 | ||
| Mn | 0.6 | 0.9 | ||
| Si | 0.17 | 0.37 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| flats, cold drawn | HB ≤255 | |||||
| flats, annealed, tempered or normalized tempered | HB ≤229 |