Properties of S690Q low alloy steel plate
S690Q alloy steel plate is a high-strength, low-alloy structural steel plate. The "S" in S690Q stands for structural steel, "690" means that its yield strength is about 690MPa, and "Q" means that this steel has been quenched and tempered, and has good toughness and weldability.
Performance characteristics of S690Q high strength low alloy steel
Fatigue resistance: It can withstand repeated stress cycles and reduce the occurrence of fatigue cracks.
Corrosion resistance: S690Q high strength plate has good corrosion resistance after special anti-corrosion treatment, can resist oxidation and corrosion, and extend service life.
Good welding performance: S690Q high tensile steel plate can be connected and fixed with other steel or structures by various welding methods.
S690Q low alloy steel can be widely used in many fields such as construction, bridges, ships, vehicles, machinery manufacturing, and key components with low temperature resistance and high strength.
EN10025-6 S690Q high strength steel chemical composition
| Grade | C % | Si % | Mn % | P % | S % | N % | B % | Cr % |
| S690Q | 0.200 | 0.800 | 1.700 | 0.025 | 0.015 | 0.015 | 0.005 | 1.500 |
| Cu % | Mo % | Nb % | Ni % | Ti % | V % | Zr % | ||
| 0.500 | 0.700 | 0.060 | 2.000 | 0.050 | 0.120 | 0.150 |
EN10025-6 S690Q high strength low alloy steel plate mechanical properties
| Grade | Thickness | Min Yield | Tensile | Elongation | Min Impact Energy | |
| S690Q | 8mm-50mm | Min 690Mpa | 770-940Mpa | 14% | -20 | Min 30J |
| 51mm-100mm | Min 650Mpa | 760-930Mpa | 14% | -20 | Min 30J | |
| 101mm-150mm | Min 630Mpa | 710-900Mpa | 14% | -20 | Min 30J |
