What is JIS SM490YB plates equivalent ASTM steel

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After adding phosphorus, copper, chromium, nickel and other trace elements to the steel, a dense and highly adherent protective film is formed on the surface of the steel, which hinders the spread and development of rust and protects the substrate under the rust layer to slow down its corrosion rate. The amorphous spinel-type oxide layer with a thickness of about 50μm-100μm formed between the rust layer and the substrate is dense and has good adhesion to the substrate metal.

Rolling steel is the process of pressing to change the shape of the ingot and billet between the rotating rolls. The so-called steel rolling process is a combination of a series of steel rolling processes. The entire rolling production process is always composed of the following JIS SM490YB plates basic processes: ① billet preparation:Including the cleaning of surface defects, the removal of surface scale and the pre-heat treatment of billets. ② billet heating ③ steel rolling: it is the core of the entire rolling production process. ④ Finishing.

A204 Grade A steel chemical composition(%)Carbon: 0.18-0.25 Manganese max.: 0.90Phosphorus Max.: 0.025Sulfur Max.: 0.025Silicon: 0.15-0.40Molybdenum: 0.45–0.60JIS SM490YB plates, A204 Grade A steel mechanical propertiesTensile strength, kis [MPa]: 265-85 [450-585]Yield strength, min, kis [MPa]: 37 [255]Elongation in 8 in. [200 mm], min, %: 19Elongation in 2 in. [50 mm], min, %: 23

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SG255 gas cylinder JIS SM490YB plates steel is widely used in petroleum, chemical industry, power station, boiler, etc, used to make the reactor, heat exchanger, separator. The company is a professional gas cylinder steel exporter and a steel stockist in china. We keep more than 1000 tons SG255 gas cylinder steel coils in JIS SM490YB plates stock every month. If you want to get the steel price, please do not hesitate to contact us. Any need in SG255 Chemical Composition and Mechanical Properties, please feel free to contact us by email or calling to us.