![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
45 # seamless steel pipe spot chemical composition: carbon (C) content is 0.42 ~ 0.50%, Si content of 0.17 ~ 0.37%, Mn content of 0.50 ~ 0.80%, Cr content <= 0.25%. 45# seamless steel pipe spot weight calculation formula: [(outer diameter - wall thickness) * wall thickness] * 0.02466 = kg / m (weight per meter) 45 # seamless steel pipe processing method: Recommended heat treatment heat treatment temperature: normalizing 850 , Quenching 840, tempering 600. 45 # steel for high-quality carbon structural steel, hardness is not easy to cut processing, the mold is often used to do the template, the tip, the guide column, but must be heat treatment. 1. Before 45 # steel is quenched and not tempered, the hardness is greater than HRC55 (up to HRC62) as qualified. The highest hardness for practical application is HRC55 (high-frequency hardening HRC58). 2. Do not use carburizing and quenching heat treatment for 45# seamless steel pipes. The quenched and tempered parts have good overall mechanical properties and are widely used in a variety of important structural parts, especially connecting rods, bolts, gears and shafts that work under alternating loads. However, the surface hardness is low and it is not wear resistant. Can be used for quenching and tempering + surface hardening to improve parts 273*20 15 into the day 377*18 40 Chengdu 480*14 48 Chengdu 325*7 40 Chengdu 377*20 ​​38 Chengdu 500*18 51 Chengdu 325*8 30 Chengdu 406*8 30 Chengdu 508* 9 80 Chengdu 325*8.5 38 Chengdu 406*9 67 Chengdu 508*9.5 70 Chengdu 325*9 15 Chengdu 406*9.5 40 Chengdu 508*10 50 Chengdu 325*9 10 Chengdu 406*10 55 Chengdu 508*11 35 Chengdu 325* 10 50 Chengdu 406*11 70 Chengdu 508*12 35 Chengdu 325*11 80 Chengdu 406*12 60 Chengdu 508*13 50 Chengdu 325*12 25 Chengdu 406*13 65 Chengdu 508*14 10 Chengdu 325*13 70 Chengdu 406* 14 35 Chengdu 508*15 30 Chengdu 325*14 30 Chengdu 406*16 48 Chengdu 530*9 40 Chengdu 325*15 30 Chengdu 406*17 30 Chengdu 530*10 50 Chengdu 325*16 45 Chengdu 406*18 50 Chengdu 530* 11 51 Chengdu 325*17 50 Chengdu 426*8 62 Chengdu 530*12 40 Chengdu 325*18 35 Tianjin 426*9 50 Chengdu 530*13 82 Chengdu 325*20 5 Chengdu 426*9.5 35 Chengdu 530*14 50 Chengdu 356* 8 58 Chengdu 426*10 25 Chengdu 530*15 61 Chengdu 356*9 50 Chengdu 426*11 35 Chengdu 560*9 12 Chengdu 356*9.5 60 Chengdu 426*12 40 Chengdu 560*10 35 Chengdu surface hardness.