HEAT-RESISTANT ALLOY HAVING HIGH CREEP RUPTURE STRENGTH UNDER HIGH-TEMPERATURE LOW-STRESS CONDITIONS AND EXCELLENT RESISTANCE TO CARBURIZATION

摘要

A heat-resistant alloy having a high creeprupture strength under high-temperature low-stressconditions and excellent resistance to carburizationeven when used at a high temperature exceeding 1100°C.The alloy comprises, in % by weight, more than 0.1%to less than 1.5% of C, more than 2% to less than 3% ofSi, more than 0% to less than 2% of Mn, more than 20%to less than 30% of Cr, more than 25% to less than 40%of Ni, more than 0.6% to less than 2% of Al, and thebalance Fe and inevitable impurities. When required,the alloy contains at least one component selected fromthe group consisting of 0.01 to 0.5% of Zr, up to 0.2%of N, 0.2 to 2.0% of Nb, 0.2 to 2.0% of W and 0.01 to 0.3%of Ti.