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
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