GB / T 714-2008 Q345QD桥梁结构钢
What does Q345qD stand for?
The first letter of “Qufu”(yield strength in Chinese spelling);
The minimum value of yield strength in MPa;
q- the first letter of “Qiao”(bridge steelin Chinese spelling);
D- the steel quality is Grade D.
有三个质量水平Q345Q.：C，D和E.
GB/T 714-2008 Q345qD grade belongs to structural steel for bridge. The Q345qD steel products are produced in plates thickness less than 150mm, steel sheets, strips and cutting steel parts less than 25.4mm thickness, and steel sections less than 40mm. Welcome to contact us email:[电子邮件受保护]您对我们的Bridge SteelQ345QD板块感兴趣。
Q345qDsteel chemical composition (%)
| 年级 | C | SI. | m | P. | S. | NB. | V. | TI. | CR. | 你 | 铜 | 莫 | N | ALS. |
| Q345QD | ≤0.18 | ≤0.55 | 0.90-1.70 | ≤0.025. | ≤0.025. | ≤0.06. | ≤0.08 | ≤0.03 | ≤0.80. | ≤0.50. | ≤0.55 | ≤0.20 | ≤0.012. | ≥0.015 |
Q345QD钢机械性能
| 年级 | 屈服强度（MPa）min以mm厚度 | 拉伸强度分钟。 | 伸长 | V型冲击试验 | ||
| ≤50. | >50≤100. | MPA. | ％最少 | 测试温度℃ | 冲击吸收能量KV 2 / J. | |
| Q345Q. | 345. | 335. | 490. | 20. | 0. | 47. |
GB/T 714 Q345qD structural steel plates and sheets are supplied in normalized, thermo-mechanical rolling, quenched and tempered condition. The bridge steel is also featured with atmospheric corrosion resistance.
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