carbon-steel-h-beam-q690d has high strength, good fatigue resistance; high toughness and low brittle transition temperature; good cold forming performance and welding performance. In addition, carbon-steel-h-beam-q690d has good corrosion resistance and certain wear resistance. High strength, especially in the normalizing or normalizing plus tempering state has a higher comprehensive mechanical properties.
carbon-steel-h-beam-q690d Chemical Composition
|
Grade |
Chemical requirement or element Max % |
||||||||||||
|
|
C |
Si |
Mn |
P |
S |
Cu |
Cr |
Ni |
Mo |
B |
V |
Nb |
Ti |
|
Q690D |
0.2 |
0.8 |
1.7 |
0.025 |
0.015 |
0.5 |
1.5 |
2 |
0.7 |
0.005 |
0.12 |
0.06 |
0.05 |
carbon-steel-h-beam-q690d Mechanical Property
| Q690 Yield Strength (≥N/mm2); Thickness or Dia. d (mm) | ||||||
| Standard | Steel Grade | Quality | d≤16 | 16<d≤40 | 40<d≤63 | 63<d≤80 |
| GB/T 1591 – 2008 | Q690 | C, D, E | 690 | 670 | 660 | 640 |
| GB/T 1591 – 2018 | Q690M | C, D, E | 690 | 680 | 670 | 650 |
carbon-steel-h-beam-q690d is an economic cross-section and high efficiency cross-section with more optimized cross-sectional area distribution and more reasonable strength to weight ratio. Its cross-sectional shape resembles the capital Latin letter H. It is also called universal steel beam, broadside (edge) I-beam or parallel flange structure. the cross-section of H-beam usually consists of two parts: web and flange, also called waist and edge. Due to the right angle arrangement of each part of H-beam, H-beam has the advantages of strong bending resistance, simple construction, cost saving, and light structure in all directions, and has been widely used.
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