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EN 10028-3 P 275 NH steel, EN 10028-3 P 275 NH steel hardness and heat treatment specification

EN 10028-3 P 275 NH steel hardness and heat treatment specification

EN 10028-3 P 275 NH steel is one kind of boiler and pressure vessel steel. EN 10028-3 P 275 NH steel is widely used in petroleum, chemical engineering, power plants, boilers and other industries for the production of the reactor, heat exchangers, separators, tank, gas tank, nuclear reactor pressure vessel, boiler, liquefied petroleum gas cylinders, Hydropower high-pressure pipes, turbine spiral case equipment and components.

EN 10028-3 P 275 NH steel hardness and heat treatment specification:

Annealing hardness
HBS

Cold pull hardness
HBS

Preheating temperature

Quenching temperature

Holding time
min

Hardening medium

Temper temperature

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

δ
Samples 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

Note:
(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
Caracteristiques mecaniques
ReH 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 

BEBON STEEL is EN 10028-3 P 275 NH steel supplier, we can offer High quality steel plate, and pretreatment of the advanced equipment. If you are interested in EN 10028-3 P 275 NH steel, please contact BEBON STEEL.

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