General Product Description
Q690E steel material has high strength, good plasticity and toughness, good weldability, good cold and hot properties. Q690E steel material is mainly used for manufacturing various large-scale engineering structural components and construction machinery.
Representative Method
"Q" as the first letter of the Chinese character Pinyin of the yield strength of steel; "550" as the yield strength value, in MPa; D-quality grade is D grade (quality grade is divided into C, D , E).
Dimension Range
Q550D is available in thicknesses of 5mm-350mm. And Q550D is available in width of 1200mm-4200mm and cut to length sheets in lengths up to 18 meters.
Mechanical Property
| Steel Grade | Yield Strength MPa min | Tensile Strength MPa | Elongation % Min | Impact Energy J | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| t≤50 | 50-100 | 100-150 | t≤50 | 50-100 | 100-150 | 0°C | -20°C | -40°C | -60°C | ||
| Q550D | 550 | 530 | 490 | 640-820 | 640-820 | 590-770 | 16 | 47 | 47 | 34 | 34 |
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 |
Fabrication and Delivery Conditions
Please contact us, we will provide professional consultation and efficient services according to your needs
Further Reading
- The full Baosteel heat-treated steel program — NM / BS / BST / BP grades and sizes
- Baosteel BS960E vs Strenx 960 — specs, price and real mill data
- Our Baosteel steel supply program
Global Equivalent Grades
Q690D/E is the Chinese GB/T 1591 grade at the 690 MPa yield class, directly comparable to the European and Japanese designations:
| Mill / standard | Grade | Country / region |
|---|---|---|
| GB/T 1591 (China) | Q690D / Q690E | China |
| EN 10025-6 (Europe) | S690QL | Europe |
| SSAB (Sweden) | Strenx 700 · Weldox 700 | Sweden |
| Baosteel (China) | BS700MC K2/K4 | China |
| Dillinger (Germany) | Dillimax 690 | Germany |
Baohui Steel supplies this grade together with the Baosteel-made equivalents above, all with original mill test certificates.
