The main load-bearing structure of the container flat car adopts 09CuPCrNi-A steel Q450NQR1 high-strength weathering steel with a yield strength of 450 MPa, and the section steel is mainly made of self-made profiles to reduce the weight of the vehicle and reduce the manufacturing cost. It is characterized in that the alloy composition and weight percentage content of weathering steel are: C: ≤0.12, Si: 0.25 to 0.75, Mn: 0.2 to 0.5, S ≤ 0.02, P: 0.06 to 0.12, Cu: 0.25 to 0.5, and Cr: 0.3 ~ 1.25, Ni: 0.12 ~ 0.65, the rest are Fe and trace elements. Through alloying of Cu, Mn, Si, Al, etc., and simple adjustment of some element content of ordinary low carbon steel (Q235 steel), it can produce good atmospheric corrosion resistance without changing the production process conditions of Q235 steel economical weathering steel with comprehensive mechanical properties. Weathering steel plate itself is a steel plate for containers, which is designed to be painted. It is not suitable for comp...

Q355GNH steel to GB/T 4171 weathering steel standard Q355GNH steel plate chemical composition Carbon0.12 max., Silicon0.25-0.75, Manganese 1.00 max. , Phosphorus 0.07-0.15, Sulfur 0.020 max., Copper 0.20-0.55, Chromium0.30-1.25, Nickel 0.65 max. Why is Q355GNH steel plate corrosion-resistant? The addition of phosphorus, copper, chromium, nickel and other trace elements to the steel will form a dense and highly adherent protective film on the surface of the steel, hinder the spread and development of rust, and protect the substrate below the rust layer to slow its corrosion rate. An amorphous spinel oxide layer of about 50 μm to 100 μm thick formed between the rust layer and the substrate is dense and has good adhesion to the base metal. The presence of this dense oxide film prevents oxygen and The infiltration of water into the steel substrate slows down the development of rust into the steel material and greatly improves the atmospheric corrosion resistance of the steel mater...

What is the steel Q345NQR2? TB/T 1979-2014  Q345NQR2 steel is a new Chinese steel grade of atmospheric corrosion resisting steel.According to TB/T 1979-2014, Q345NQR2 steel has minimum yield strength of 345MPa.  “Q” is the first letter of Chinese Pinyin: “Qufu”, which means Yield Strength, “355” is the minimum value of yield strength 355 MPa. “NQ” means the first letter of Chinese Pinyin“NaidaQifushi”, which means atmospheric corrosion resisting.R is short for as rolled. Material: Q345NQR2 grade Standard: TB/T 1979-2014 Equivalent: hot rolled 09CuPTiRE-A Category: atmospheric corrosion resisting steel for railway rolling stock What are the technical data of Q345NQR2 steel? Mechanical properties for TB/T 1979 Q345NQR2 Steel Plate Yield strength (≥Mpa) Tensile strength (≥Mpa) Elongation % ≥ 345 480 24 Chemical composition for TB/T 1979 Q345NQR2 steel plate (heat analysis%) C...

TB/T 1979-2014 Q345NQR3 atmospheric corrosion resisting steel Standard: TB/T 1979-2014 Equivalent: hot rolled 09CuPTiRE-B Category: atmospheric corrosion resisting steel for railway rolling stock Q345NQR3 steel is a new Chinese steel grade of 09CuPTiRE-B atmospheric corrosion resisting steel.According to TB/T 1979-2014, Q345NQR3 steel has minimum yield strength of 345MPa. Mechanical properties for TB/T 1979 Q345NQR3 Steel Plate Yield strength (≥Mpa) Tensile strength (Mpa) Elongation % ≥ 345 480 24 Chemical composition for TB/T 1979 Q345NQR3 steel plate (heat analysis max%) C Si Mn P S Cu Ti RE 0.12 0.20-0.50 0.25-0.70 0.06-0.12 0.02 0.25-0.50 0.03 0.01-0.04 Q345NQR3 steel plates and Q345NQR3 steel coils in BBNSTEEL's stock warehouse are ready for shipment.These Q345NQR3 steel plates shall be done low temperature impacting test at -40 Deg.C with impact energy 27J for plate thickness equal or abo...