20 # material is a high-quality low-carbon carbon steel, cold-extruded, carburized and hardened steel. ASTM A709 low alloy steel sheet, 20 # material has low strength, good toughness, plasticity and good weldability. Chemical composition of 20 # round steel bar: C: 0.17 ~ 0.23, Si: 0.17 ~ 0.37, Mn: 0.35 ~ 0.65, S: ≤0.035, P: ≤0.035, Cr: ≤0.25, Ni: ≤0.30, Cu: ≤0.25. 20# carbon steel mechanical properties: Shear strength 275 ~ 392MPa, Tensile strength is 253 ~ 500MPa, elongation min. 25%.
2020 October stock ASTM A709 low alloy steel sheet product: 8*1800*10950, 16*2150*10950, 70*2270*7350, 6*2200*10000, 20*3200*4400, 20*2280*5800, 20*2100*10800, 70*2270*7000, 12*2050*5100, 20*3200*4400, 12*2000*11850, 14*2940*9600, 20*2150*10000, 70*2260*7700, 6*1950*10000, 12*2000*11850, 6*2200*10000, 14*2510*10950, 16*2150*10000, 70*2260*7240, 20*3200*4400, 6*2200*10000,20*2100*7000, 12*2500*8000, 20*2100*10750, 35*2200*6800, 12*2000*11850, 20*2100*7000, 31.2*2950*9380.
According to the data released by the world iron and Steel Association, the world pig iron production in March 2020 was 103 million tons, a year-on-year decrease of 3.5%, a year-on-year increase of 1.8% in February, and the overseas pig iron ASTM A709 low alloy steel sheet production excluding China was 36.309 million tons, a year-on-year decrease of 11%.
