Chinese Steel Standard,Steel Grade & Equivalent Standard

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Q345 steel specification: Q345 steel belongs to 16Mn steel grade, usually it is produced in hot rolled state, hot rolled steel plate, hot rolled steel coil/sheet, it has comprehensive mechanical and welding property, as it shows good performance in structural purposes, it is widely used as welding structural part in manufacturing of ship, railway and vehicles, bridges, boiler, pressure vessel container, steel oil tank, etc. Yield point of Q345 steel plate decreases as plate thickness increases.

Q345 steel properties: welding property of Q345 steel is occasionally questioned by end users, although welding property is mainly affected by its chemical content, its production technology has been improved after all those years of research, and has been proved to be one excellent steel standard for steel structure purposes, you can contact us if there’s any doubt in your mind.  

 Application difference Q345 / Q235:

As Q345 and Q235 alloy element content is different, their applications are quite different.  

Q235 carbon structural steel is made for metal construction that doesn’t have high demand for steel strength, tie rod, connecting rod, hook, coupler, bolt and nut, sleeve, shaft and welding parts.

Q345 is low alloy structural steel with good mechanical properties, low temperature performance, plasticity and good weldability, it is mostly used in low pressure vessel, oil tank, vehicles, cranes, mining machinery, power stations, mechanical parts, building structure, general metal parts, Q345(E) steel plate is always delivered in hot rolled or normalizing state, can be used in areas where its temperature is above -40 ℃

Mechenical Property Comparision of  Structural Steel -- Q345/Q235 & S355/S275/S235:

Chemical Composition of  Structural Steel -- Q345/Q235 & S355/S275/S235:

Q345 Steel Chemical Composition:

Q345 Steel Mechanical Property:

Q235 Steel Chemical Composition:

Q235 Steel Mechanical Property:

Chinese Steel Standard and Equivalent other standards:

Carbon Structure Steel, Low-Alloy Structure Steel

Quality Carbon Structure Steel

Reinforcing Steel Bar, Alloy Structure Steel

Carbon Tool Steel, Spring Steel

Alloy Tool Steel, High Speed Tool Steel

Bearing Steel

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We specialize in creation of high-quality Pre-engineered steel structure building such as: warehouse, workshop, factory, cold storage, high-rise building, shopping mall, power plants, distribution centers, pedestrian bridge, hotels, public schools, sports arenas, car parking center, airplane hangars, church building, farm building, agricultural building, storage shed, self-storage building, poultry farm and green house; Prefabricated house and Modular Container house such as: portable cabin, labor camp, labor quarter, worker dormitory, construction site office, accommodation, recreation, clinic, medical facilities, quick-assemble container, sanitary container, toilet container, shower container, canteen, portable living units, portable office. We provide our time-tested PEBs, Prefabricated house and Modular container house to clients in the sectors of oil & gas, mining, Energy, Infrastructure and Construction projects. AOT built his reputation upon Profession, Reliability and Service.