With the increase of temperature, the yield limit of ASTM A709 structural steel sheet will decrease monotonically, but the tensile strength of ASTM A709 structural steel 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 ASTM A709 structural steel sheet. Near the blue brittleness temperature, the ASTM A709 structural steel sheet strength increases and the plasticity decreases. The elongation and section shrinkage of ASTM A709 structural steel 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.
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Thin steel 5mm to 10mm ASTM A709 structural steel sheet stock list 5*2550*9200, 5.5*2500*10000, 5*2670*8500, 7*2260*8600, 6*2510*10400, 5*1860*12000, 8*2000*10000, 7*2000*8000, 8*2350*8600, 10*2500*8500, 8*2540*8200, 9*2500*9500, 10*2510*10600, 8*2400*6000, 10*2550*8500, 10*2800*6300, 10*1600*12000, 10*2000*6500, 10*2650*8300, 10*2800*6150, 10*2000*8600, 10*2150*5500.
