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在高(gao)温(wen)(wen)(wen)度(du)(du)(du)(du)下(xia)有着较(jiao)高(gao)的强(qiang)(qiang)度(du)(du)(du)(du)和(he)(he)优异的化(hua)(hua)(hua)学稳(wen)定性(xing)(xing)(xing)的合金钢(gang)。它包(bao)括抗氧化(hua)(hua)(hua)钢(gang)（或称高(gao)温(wen)(wen)(wen)度(du)(du)(du)(du)不起皮钢(gang)）和(he)(he)热强(qiang)(qiang)钢(gang)两类。抗氧化(hua)(hua)(hua)钢(gang)通常要(yao)求(qiu)比较(jiao)好的化(hua)(hua)(hua)学稳(wen)定性(xing)(xing)(xing)，但承受的载荷较(jiao)低。耐热钢(gang)铸造厂：热强(qiang)(qiang)钢(gang)则要(yao)求(qiu)较(jiao)高(gao)的高(gao)温(wen)(wen)(wen)度(du)(du)(du)(du)强(qiang)(qiang)度(du)(du)(du)(du)和(he)(he)相(xiang)应的抗氧化(hua)(hua)(hua)性(xing)(xing)(xing)。耐热钢(gang)较(jiao)常用于制造锅炉、汽轮机、动力机械、工(gong)(gong)业(ye)(ye)炉和(he)(he)航空、石(shi)油化(hua)(hua)(hua)工(gong)(gong)等工(gong)(gong)业(ye)(ye)部门中在高(gao)温(wen)(wen)(wen)度(du)(du)(du)(du)下(xia)作业(ye)(ye)的零部件(jian)。这一些部件(jian)除要(yao)求(qiu)高(gao)温(wen)(wen)(wen)度(du)(du)(du)(du)强(qiang)(qiang)度(du)(du)(du)(du)和(he)(he)抗高(gao)温(wen)(wen)(wen)度(du)(du)(du)(du)氧化(hua)(hua)(hua)腐(fu)蚀外(wai)，依据用处不一样(yang)还要(yao)求(qiu)有满(man)足的韧(ren)度(du)(du)(du)(du)、优异的可加工(gong)(gong)性(xing)(xing)(xing)和(he)(he)焊(han)接(jie)性(xing)(xing)(xing)，及(ji)其相(xiang)应的组(zu)织(zhi)稳(wen)定性(xing)(xing)(xing)。别的，还发展出一些新(xin)的低铬镍抗氧化(hua)(hua)(hua)钢(gang)种。

耐热钢较常用(yong)于(yu)制造锅炉、汽(qi)轮机、动力机械、工(gong)业(ye)炉和航空(kong)、石油化(hua)(hua)工(gong)等(deng)工(gong)业(ye)部(bu)(bu)门中在(zai)高(gao)(gao)温度下作业(ye)的零部(bu)(bu)件(jian)。这(zhei)一(yi)些部(bu)(bu)件(jian)除要(yao)求高(gao)(gao)温度强(qiang)度和抗(kang)高(gao)(gao)温度氧化(hua)(hua)腐蚀外，依据用(yong)处不一(yi)样还要(yao)求有满足的韧度、优异的可(ke)加工(gong)性和焊(han)接性，及其相应的组织稳定性。