Products Description
Q550D Steel Plate is a high-strength low-alloy (HSLA) steel plate produced according to the GB/T1591-2008 standard. It is designed for applications requiring excellent toughness, high strength, and low-temperature performance.
The steel plate has a minimum yield strength of 550 MPa, making it suitable for use in structural applications that involve heavy loads and harsh environmental conditions.
Chemical Composition
| STEEL GRADE | C% max | Si% max | Mn% max | P% max | S% max | Cu% max | Cr% max | Ni% max | Mo % max | B % max | V % max | Nb% max | Ti % max |
| Q550D | 0.2 | 0.80 | 1.7 | 0.02 | 0.010 | 0.5 | 1.5 | 2 | 0.70 | 0.005 | 0.12 | 0.06 | 0.05 |
Mechanical Property
| STEEL GRADE | Re yield strength Mpa min | Re yield strength Mpa min | elongation % | Energy and temperature | |||||||
| Min | 0 | -20 | -40 | -60 | |||||||
| t≤50 | 50-100 | 100-150 | t≤50 | 50-100 | 100-150 | J | J | J | J | ||
| Q550D | 550 | 530 | 490 | 640-820 | 640-820 | 590-770 | 16 | 47 | 47 | 34 | 34 |
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 |
- |
- |
