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T91 Heat Treatment

Data Table for: Steel Grades: High Alloy: T91

Chemical composition % of the ladle analysis of grade T91

Mechanical properties of grade T91

Technological properties of grade T91

Hardness and heat treatment specification of grade T91

Annealing hardness HBS Cold pull hardness HBS Preheating temperature °C Quenching temperature °C Holding time min Hardening medium Temper temperature ºC After tempering hardness ≥HRC
      salt-bath furnace controlled atmosphere furnace      
235 262 788 1191 1204 5~15 air cooling 522 60
Steel plate/ Sheet thickness / mm σb MPa σs ≥/MPa δSamples from the standard for 50 mm (2 in) 180 ° of cold bending test
        longitudinal horizontal
Hot-rolled/Cold rolling:5 - 150 520 415 16~18 2a 3.5a
  1. listed in the table apex diameter (d), to steel thickness (a) multiples said.
  2. in the ASTM A6 standard specified scope can meet any additional conditions.
  3. from the standard for 50 mm (2 in).

Mechanical properties
Mechanische Eigenschaften
Caracteristique mecaniques
Minimum yield strength / Mindestwert der oberen Streckgrenze / Limite d'elasticite minimale
Rm Tensile strength / Zugfestigkeit / Resistance a la traction
A Minimum elongation / Mindestwert der Bruchdehnung / Allongement minimal
J Notch impact test / Kerbschlagbiegeversuch / Essai de flexion par choc

T91 steel description:

Step Shaft: steel plate/sheet,coil,round bar,flat bar,tube/pipe,Profiled forgings

T91 steel Specifications or Size:

Round bar:

Diameter : 1mm-2000mm

Square bar:

Size: 50mm * 50mm-600mm *600mm

Plate steel/flat bar:

Size: Thickness: 0.1mm-800mm Width: 10mm to 1500mm


Size: OD: 6-219mm WT: 1-35 mm.

Superheat FGH has extensive experience in T91 heat treatment. We can provide T91 heat treatment to your specifications or consult you on T91 heat treatment process for your application.

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