1. Q460qD-Z15 material description
Q460qD-Z15 steel plate is a bridge structural steel plate under the GB/T 714 standard. There are three quality grades: Q460qC, Q460qD, and Q460qE. Z-direction performance is added after the steel plate designation to represent Z-direction performance Z15, Z25, Z35 symbols, for example: Q460qD- Z15.
2. Q460qD-Z15 grade shows: Q yield strength; 460 yield strength value; q bridges; D quality grade; Z15 mentioned above, the Z direction is the thickness direction.
3. Q460qD-Z15 steel plate heat treatment: hot rolling, quenching and tempering, etc.
4. Q460qD-Z15 steel plate chemical composition
| C |
Si |
Mn |
Nb |
V |
T |
As |
Cr |
Ni |
Cu |
Mo |
N |
| ≤0.11 |
≤0.55 |
1.0-1.7 |
0.01-0.09 |
0.01-0.08 |
0.006-0.03 |
0.01-0.045 |
0.5 |
0.3 |
0.3 |
0.25 |
≤0.008 |
5. Q460qD-Z15 steel plate mechanical properties:
| Grade |
Yield Strength ReL(N/mm2) |
Tensile Strength Rm/(N/mm2) |
Elongation A/% |
Impact Energy (Longitudinal) Akv/J |
| Thickness/mm |
| ≤50 |
>50-100 |
>100-150 |
Temperature |
≥ |
| Q460qD |
≥460 |
≥450 |
- |
≥570 |
≥18 |
-20 |
120 |
6. Q460qD-Z15 steel plate is widely used in railway and highway bridge construction.
