Hot Rolled Welded ASTM A514grq
Hot Rolled Welded ASTM A514grq
Offshore platforms (including oil production platforms and drilling platforms) due to the erosion and destruction of natural forces such as waves, submarine earthquakes, low temperatures, etc., the technical indicators of steel are extremely high, and the technical standards for steel such as rack and pile legs are more stringent. In order to realize the localization of steel for offshore platforms, Chinese steel mills began to develop 140mm thick tempered high strength steel A514GrQ in 2008, which lasted 10 months and achieved success. In the 140mm thick A514GrQ to achieve mass production at the same time, Chinese steel mills quickly invested in greater thickness of the steel research and development work. In 5 months, we have developed A514GrQ with different thickness specifications such as 150mm, 180mm and 215mm, and successfully passed the certification of ABS Classification Society. This means that all the thick plates of the high-strength steel series used in China's offshore platforms can be independently produced by Chinese steel mills.
chemical compositon Max
| Element | A514 Grade Q |
| C | 0.14-0.21 |
| M | 0.95-1.3 |
| P | 0.035 |
| S | 0.035 |
| Si | 0.15-0.35 |
| Ni | 1.20-1.5 |
| Cr | 1.00-1.5 |
| Mo | 0.45-0.60 |
| V | 0.03-0.08 |
| B | - |
| Nb | - |
Mechanical Properties
| Grade | size | Rel.MP | Rm.MPa | A%(℃) | AKV(℃) | AKV/J | ||
| AS14Gr.Q | 127 | 712 | 822 | 27 | -46 | 90 | 76 | 96 |
Application
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