第一章 钢铁材料

0.18Р0.35-0.80Р0.30Р0.040Р0.040РZРDР0.17Р0.35-0.80Р0.30Р0.035Р0.035РTZРQ255РA / BР0.18-0.28Р0.40-0.70Р0.30Р0.050 / 0.045Р0.045РZРQ275Р－Р0.28-0.38Р0.50-0.80Р0.35Р0.050Р0.045РZР碳钢Р8РР用途Р钢板、钢筋、型钢，?作桥梁、建筑等构件Р热处理：热轧空冷?组织：S＋FР多边型角钢Р螺钉、铆钉Р钢筋、螺纹钢Р建筑构件Р钢桥梁Р碳钢Р9РР2．优质碳素结构钢Р牌号 —— 如 45 钢，含C量为 45 / 10000 = 0.45 % 。Р钢号Р化学成分，%Рs ，MPa??≥РCРMnРSiРSРPР08F?10?20?35?40?45?50?60?65Р0.05-0.11?0.07-0.13?0.17-0.23?0.32-0.39?0.37-0.44?0.42-0.50?0.47-0.55?0.57-0.65?0.62-0.70Р0.25-0.50?0.35-0.65?0.35-0.65?0.50-0.80?0.50-0.80?0.50-0.80?0.50-0.80?0.50-0.80?0.50-0.80Р0.03?0.17-0.37?0.17-0.37?0.17-0.37?0.17-0.37?0.17-0.37?0.17-0.37?0.17-0.37?0.17-0.37Р<0.035?<0.035?<0.035?<0.035?<0.035?<0.035?<0.035?<0.035?<0.035Р<0.035?<0.035?<0.035?<0.035?<0.035?<0.035?<0.035?<0.035?<0.035Р175?205?245?315?335?355?375?400?420Р碳钢Р10