BBN S355J2G1W steel for bridge construction inventory resources

The SM570 steel plate has a yield strength of more than 460MPa and a 60Kg strength grade steel because it contains a variety of alloying elements, including microalloying elements, and can often achieve higher strength in the state of hot rolling or controlled rolling, but the impact toughness fluctuates greatly. S355J2G1W steel for bridge construction product Normalizing has the advantages of uniform and stable steel structure and performance, high qualification rate, and easy control of the production process.

After adding trace elements such as phosphorus, copper, chromium, and nickel to Q355NH steel, a dense and highly adherent protective film is formed on the surface of the weathering steel, which prevents rust from spreading and developing, and protects the substrate under the rust layer to slow its corrosion . 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, which greatly improves the atmospheric corrosion resistance of the steel material, S355J2G1W steel for bridge construction.

The location weld of S355J2G1W steel for bridge construction, wear-resistant steel plate is only allowed to be welded on the base metal surface with the electric welding rod for welding the base metal; in the welding of the base course, the base weld shall be strictly prevented from melting to the transition layer or even the multiple layer weld of stainless steel, so as to prevent a small amount of high chromium and high nickel surfacing wear-resistant steel plate components diluted into the carbon steel weld to form martensite structure and harden.

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