How to distinguish between A572 Gr 42 carbon steel plate sheet and general steel plate

With the increase of temperature, the yield limit of A572 Gr 42 carbon steel plate sheet will decrease monotonically, but the tensile strength of A572 Gr 42 carbon steel plate sheet will rise to a high peak value at a certain temperature, and then decrease. This peak temperature is called the blue brittleness temperature of A572 Gr 42 carbon steel plate sheet. Near the blue brittleness temperature, the A572 Gr 42 carbon steel plate sheet strength increases and the plasticity decreases. The elongation and section shrinkage of A572 Gr 42 carbon steel plate sheet 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.

A572 Gr 42 carbon steel plate sheet 2020 October inventory: 16*2200*12000, 10*2400*8450, 27*3510*7900, 14*2070*9060, 38*3300*13400, 30*2020*7000, 10*2400*8300, 35*2230*6000, 10*2200*8000, 8*2210*11000, 30*1600*10720, 25*2100*8400, 23.5*2950*10500, 38*3300*13400, 30*1600*10720, 8*2200*11200, 24*2500*5800, 25*2400*11600, 35*2220*10000, 21.5*1630*13480, 20*1950*9150, 80*2250*8850, 30*1600*10720, 21.5*1630*13480.

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