標準：GB/T 1220-1992   
●特性及適用范圍：                                                                                                                                          馬氏體型不銹耐熱鋼，除具有一定的耐蝕性能外，還具有一定的耐蝕性，在溫度為800℃以下空氣介質中具有穩定的抗氧化性能。用作具有較高的耐硝酸及有機酸腐蝕的零件、容器和設備。   
●化學成份：  

   
●力學性能：   抗拉強度 σb (MPa)：淬火回火,≥1080   伸長率 δ5 (％)：淬火回火,≥10   沖擊功 Akv (J)：淬火回火,≥39   硬度 ：退火,≤285HB   
●熱處理規范及金相組織：                                                                                                                                   熱處理規范：                                                                                                      1)退火,680～700℃高溫回火空冷;                                                                     2)淬火,950～1050℃油冷;                                                                                3)回火275～350℃空冷(HRC30左右）。                                                             金相組織：組織特征為馬氏體型