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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 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.