Steel for construction machinery and buildings

Steel grade and brand	Product specifications	Main purpose
Q235B/C/D/A36/S235JR/JO/J2+AR/+N/SS300/SS400/SS490/SS400-H/A36/A283C/St37-2/St44-2	6-100x1800-3000x6000-14000mm	The Q235B/C/D, 6-100X1800-3000XLQ235 steel plate series products for construction machinery are widely used in various engineering structures such as steel structure buildings, construction machinery, heavy vehicles, bridges, pressure vessels, etc.
Q345B/C/D/E/S275JR/JO/J2/+AR/+N/S355JR/JO/J2/K2+AR/+N	6-100x1800-3000x6000-14000mm	The Q345 low-alloy high-strength structural steel plate series products are widely used in various engineering structures such as steel structure construction machinery, mining machinery, heavy vehicles, bridges, pressure vessels, etc.
Q390A/B/C/D	8-60x1800-2800x6000-14000mm	This type of product is suitable for welding structural components in industries such as locomotives, lifting equipment, mining machinery, motors, boiler chemicals, shipbuilding, bridges, and other low-temperature environments.
Q420A/B/C/D	8-60x1800-2800x6000-14000mm	This type of product is suitable for welding structural components in industries such as locomotives, lifting equipment, mining machinery, motors, boiler chemicals, shipbuilding, bridges, and other low-temperature environments.
Q460C/D/JG590/A572Gr50/SM490A/B/SM570	8-60x1800-2800x6000-14000mm	The 60kg series high-strength steel plate has high strength, good fatigue resistance, and low-temperature toughness. It has good cold forming and welding performance and is mainly suitable for manufacturing high-strength engineering machinery, coal mine hydraulic supports, crane arm legs, frames, steel structures, etc. It is particularly important for low-temperature high-strength structural components.
JG670DB	8-60x1800-2800x6000-14000mm	This product series is made of low-carbon bainitic steel with a yield strength of 530MPa. It has high strength, high toughness, and excellent welding function, and is suitable for various construction machinery, large electric shovels, bulldozers, dump trucks, oil and gas pipelines, drilling platforms, drilling rigs, and coal mining machinery.
Q550D/Q690D	8-50x1800-3000x6000-14000mm	Mainly used in important (low-temperature) high-strength structural components, engineering machinery, mining structural components, etc.
JNS/Q295NH/Q355NH/Q235NH/SPA-H	8-40x1800-3000xLmm	JNS steel plates are mainly used in steel chimneys, flue dust collectors, and other indoor steel structures that require resistance to atmospheric corrosion. In boilers that burn heavy oil or coal, the combustion gas often contains SO2 and SO3. SO3 can significantly increase the sulfuric acid dew point of gas containing water vapor, causing sulfuric acid to condense at the low temperature of the boiler, leading to sulfuric acid dew point corrosion.
Structural steel for bridges Q345qC/D/E Q370qC/D/E Q420qC/D/E	8-40x1800-3000x6000-14000mm	Mainly used for riveting welding and bolted welding structures in highway bridges, railway bridges, cross sea bridges, elevated bridges, and large mechanical bridges, E-grade bridge steel is suitable for low temperature and cold environments or bearing dynamic loads, and is used to construct harsh bridge structural components with very complex stress conditions.
Steel for high-rise buildings Q235GJC/D	8-50x1800-3000x6000-14000mm	Steel plates used in high-rise buildings have properties such as easy welding, seismic resistance, and low-temperature impact resistance. They are mainly used in large-scale projects such as high-rise buildings, large-span sports venues, airports, exhibition centers, and steel structure factories.
60kg grade high plasticity multiphase steel plate JGS600	8-30x1800-2800x6000-12000mm	The 60kg high plasticity multiphase steel of Jinan Iron and Steel Group is a high-strength plastic steel plate that uses phase transformation induced plasticity and TMCP process to achieve a strength of 600Mpa and an elongation index of ≥ 25%.
Quality carbon structure steel 45#、50#、20#、30#	8-150x1800-2800x6000-12000mm毛边	High quality carbon structural steel plates, with their superior carbon steel properties, can be quenched and tempered, hot-rolled, or directly processed in a normalized state. They are widely used in industries such as machinery, vehicle manufacturing, and molds.