How is the performance of JIS carbon steel SM490YA CS plate

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Chinese grade of 20# steel plate: No.20American grade: ASTM1020Japanese grade: S20CGerman, British and French grades: C22, C20CMaterial No.: 1.0402, 1.0411Density: 7.85The strength of 20# steel plate is slightly higher than that of 15# steel plate, with little quenching and no tempering brittleness. JIS carbon steel SM490YA CS plate, 20# steel plate is generally used for bending and so on processing. The welding performance of arc welding and contact welding is good. When gas welding, the 20# steel plate with thin thickness and strict or complex shape is easy to crack.

As the boiler steel plate JIS carbon steel SM490YA CS plate is working under medium temperature (below 350 ℃) and high pressure, the boiler steel plate is not only subjected to high pressure, but also subjected to impact, fatigue load and water and gas corrosion. The performance requirements for boiler steel mainly include good welding and cold bending performance, certain high temperature strength, alkali corrosion resistance, oxidation resistance, etc.

With the increase of carbon content in the steel material, the yield point and tensile strength increase, but the plasticity and impact decrease. When the carbon content is more than 0.23%, the welding performance of the steel material becomes worse. Therefore, the carbon content of low alloy structural steel used for welding is generally less than 0.20%. The high carbon content can also reduce the atmospheric corrosion resistance of steel material, and the high carbon steel in the open air is easy to rust; in addition, carbon can increase the cold brittleness and aging sensitivity of JIS carbon steel SM490YA CS plate etc. steel material.

"SA572 Grade 55 [380] steel chemical composition(%)Carbon max.: 0.26Manganese max.: 1.35Phosphorus Max.: 0.030Sulfur Max.: 0.030Silicon max.: 0.40JIS carbon steel SM490YA CS plate, SA572 Grade 55 [380] steel mechanical propertiesTensile strength min. MPa: 380Yield strength min. MPa: 485Elongation % min. in 200mm : 17Elongation % min. in 50mm : 20"

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