Material Data Sheet

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Main Features
  • Much higher strength than conventional 310 stainless steels utilizing finely dispersed M23C6 and NbCrN.
  • Much better steam oxidation resistance than 18Cr-8Ni austenitic stainless steels due to 25Cr-20Ni chemical composition.
  • Weldability is equivalent to TP347H, and matching welding consumable is available.
  • Grobal shipments of more than 20 thousand tons for USC, Biomass and Waste to energy boilers.

  • Vd TÜV Material data sheet : 546 Supplement 12.2009
  • UNS No. S31042
  • ASTM A213/A213M TP310HCbN
  • ASME SA213/SA213M TP310HCbN

Chemical Composition




Mechanical Properties

Tensile property requirement at room temperature


Physical Properties

Coefficient of thermal expansion  [x10-6 /deg. C]

Thermal conductivity  [W/mdeg.C]

Modules of elasticity  [GPa]


Creep Rupture Properties

Fig.  Creep rupture test results of base metal.


Creep strength of Vd TUV546  [MPa]


Corrosion Resistance

                 Fig.  Steam oxidation test results  (650 deg. C, 500 h)               Fig.  Hot corrosion in synthetic coal ash  (650 deg. C, 20 h)



Nominal composition of matching welding consumable     (mass%)

Bend test result

Tensile test result

Fig.  Creep rupture test results of welded joint.

1) SUMITOMO HR3C tube has good weldability, such as low enough cracking susceptibility in HAZ.

2) Weld joint of HR3C tube, using matching welding consumable, has enough mechanical properties, including creep rupture strength.