Q420GJE steel plate is a steel plate for building structure, and it implements the standard GB/T 19879-2015.
The grade of Q420GJE steel plate is composed of the Hanyu Pinyin letter (Q) representing yield, yield strength value, Hanyu Pinyin letter (GJ) representing high-performance building structural steel, and quality grade symbols (B, C, D, E).
Yield strength MPa in different thick (mm) |
Tensile strength MPa in different thick (mm) |
Elongation % |
Longitudinal impact test |
|||||
|
6-16 |
16-50 |
50-100 |
100-150 |
≤100 |
100-150 |
Temperature /℃ |
Shock absorption energy, J |
|
|
≥420 |
420-550 |
410-540 |
400-530 |
530-680 |
510-660 |
20 |
-40 |
47 |
Delivery status: normalizing, normalizing+tempering, controlled rolling, quenching and tempering, TMCP, TMCP+tempering.
Smelting method: Steel is smelted by electric furnace or converter, and refined outside the furnace.
Scope of application
Q420GJE plate mainly manufactures supporting and load-bearing beams for industrial and civil buildings, and is suitable for high-rise buildings and large-span buildings. The product has significant advantages such as good quality stability, small performance fluctuations, excellent Z-direction performance, and low welding carbon equivalent. Steel plate Q420GJE is widely used in Beijing Olympics project, Shanghai World Expo project, Guangzhou Asian Games project and landmark buildings in major cities.
