HR3C

<Features>
(a) Much higher strength than conventional 310 stainless steels
     utilizing finely dispersed M₂₃C₆ and NbCrN
(b) Much better steam oxidation resistance than 18Cr-8Ni austenitic stainless steels
     due to 25Cr-20Ni chemical composition
(c) Weldability is equivalent to TP347H, and matching welding consumable is available

<Equivalent steel grade, chemical compositions>

• ASTM A213 TP310HCbN, ASME SA213 TP310HCbN
• 25Cr-20Ni-Nb-N