ACI-ASTM CB-6鋼是一種用于鑄造的馬氏體不銹鋼，通常需要熱處理（HT）后使用。在鑄造馬氏體不銹鋼中具有適度的延展性。此外，它具有適度高PREN和適度高的體現能量。
ACI-ASTM CB6 steel is a martensitic stainless steel formulated for casting. It is typically furnished in the heat treated (HT) condition. CB6 is the designation in both the ACI and ASTM systems for this material. J91804 is the UNS number.
It has a moderately high ductility among cast martensitic stainless steels. In addition, it has a moderately high PREN and a moderately high embodied energy.
The graph bars on the material properties cards below compare ACI-ASTM CB6 steel to: cast martensitic stainless steels (top), all iron alloys (middle), and the entire database (bottom).
CB-6不銹鋼標準：UNS J91804
CB-6不銹鋼化學成分（%）：
C: ≤0.06;
Fe: 74.4~81.0;
Cr: 15.5~17.5;
Ni: 3.5~5.5;
Mn: ≤1.0;
Si: ≤1.0;
Mo: ≤0.5;
P: ≤0.04;
S: ≤0.03.
CB-6不銹鋼力學性能：
抗拉強度：880MPa;
屈服強度：660MPa;
疲勞強度：410MPa;
楊氏模量：200GPa;
剪切模量：77GPa;
伸長率：18%;
斷面收縮率：40%;
泊松比：0.28.
