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41Cr4 (1.7035) material is an alloy structural steel grade commonly used internationally. Its tensile strength, yield strength and hardenability are all higher than that of 40# steel, but it also has certain defects that its weldability is limited and there is a tendency to form cracks. 41Cr4 steel is generally used for more important quenched and tempered parts, such as parts that work under alternating loads, medium speed and medium load parts.

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EN10149 S355NC steel plate/sheet,EN10149 S355NC steel plate/sheet, under EN standard, we can regard S355NC steel plate/sheet as EN S420ML standard pdf high strength steels for cold-forming, normalised steel. EN10149 S355NC is mainly used as high strength steels for cold-forming,normalised steels.The EN10149 S355NC steel grade offers excellent bending,flanging cold

With the increase of temperature, the yield limit of EN S420ML standard pdf will decrease monotonically, but the tensile strength of EN S420ML standard pdf will rise to a high peak value at a certain temperature, and then decrease. This peak temperature is called the blue brittleness temperature of EN S420ML standard pdf. Near the blue brittleness temperature, the EN S420ML standard pdf strength increases and the plasticity decreases. The elongation and section shrinkage of EN S420ML standard pdf increase with the increase of temperature, but there is a low peak at the blue brittleness temperature. The blue brittleness temperature of low carbon steel ranges from 200 ℃ to 250 ℃. The blue brittleness of low alloy steel is not obvious as that of low carbon steel, and the blue brittleness temperature is higher.

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