China · Baosteel Q/BQB
SPHD
Q/BQB 302:2009 — Q/BQB 302
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| Alt | 0.01 | |||
| C | 0.1 | |||
| Mn | 0.5 | |||
| P | 0.035 | |||
| S | 0.035 | |||
| Si | 0.05 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| plates, strip;1.6 < t < 2mm, hot rolled | ≥32 | |||||
| plates, strip;2 < t < 2.5m, hot rolled | ≥33 | |||||
| plates, strip;2.5 < t < 3.2mm, hot rolled | ≥35 | |||||
| plates, strip;3.2 < t < 4mm, hot rolled | ≥37 | |||||
| plates, strip;t ≥ 4mm, hot rolled | ≥39 | |||||
| plates, strip;t < 1.6mm, hot rolled | ≥30 | |||||
| plates, strip, hot rolled | ≥270 |