43.xlsx0.60轨道材料尺寸

43kg/m50kg/m60kg/m高A度mm140152176底B宽mm114132150头C宽mm707073腰D厚mm14.515.516.5截面面积cm25765.8理论重量44.7kg/m51.5kg/m60.64重型材料45Mn71Mn屈服强度Mpa375450抗拉强度Mpa620785淬火后增加抗拉强度Mpa伸长率%15≥8硬度HB未热处理≤241退火钢≤217未热处理≤285退火钢≤229起重型材料U71Mn，UIC900APD3，BNbREEN260抗拉强度Mpa≥880≥980≥880淬火后增加抗拉强度Mpa300300300伸长率%≥10≥9≥10轨头踏面中心硬度HB260~300280~320260~300含碳量C%0.64~0.770.64~0.770.64~0.77