Products Description
GB/T1591 Q550D Steel Plate is a high-strength low-alloy steel plate manufactured in accordance with the GB/T1591-2008 standard. Designed for structural applications requiring exceptional toughness, strength, and low-temperature performance, Q550D steel plate is an ideal choice for heavy-duty machinery, engineering structures, and steel construction that must perform reliably in harsh conditions.
Q550D Chemical compositionMax % of the Product analysis of grade
|
C |
Si |
Mn |
P |
S |
Nb |
V |
Ti |
|
0.18 |
0.60 |
2.00 |
0.030 |
0.025 |
0.11 |
0.12 |
0.20 |
|
Cr |
Ni |
Cu |
N |
Mo |
B |
Als min |
|
|
0.80 |
0.80 |
0.80 |
0.015 |
0.30 |
0.004 |
0.015 |
|
Q550D Yield strength
|
Nominal thickness (mm) |
To 16 |
16-40 |
40-63 |
63-80 |
80- 100 |
100- 150 |
150- 200 |
200- 250 |
250- 400 |
|
ReH - Minimum yield strength (MPa) |
550 |
530 |
520 |
500 |
490 |
- |
- |
- |
- |
Q550D Tensile Strength
|
Nominal thickness (mm) |
To 40 |
40-63 |
63-80 |
80-100 |
100-150 |
150-250 |
250-400 |
|
ReH - Minimum yield strength (MPa) |
670-830 |
620-810 |
600-790 |
590-780 |
- |
- |
- |
Q550D Impact Test degree and energy
|
|
Min Energy Nominal thickness |
||
|
Temperature ℃ |
-20 |
||
|
Thickness (mm) |
12-150 |
150-250 |
250-400 |
|
Notch impact test. Min. absorbed energy |
47 |
- |
- |
