Nitrodur 8524 QT - High-Performance Quenched & Tempered Steel for Hydraulic Applications

1.8524 (8CrMo16) is nitrided in quenched and tempered condition, used in highly stressed parts of the hydraulic industry. It is treated for shearability to use in die forgings and cold extruded parts.

Properties

General

Property	Value
Density	7.8 g/cm³

Dimension

Property	Value	Comment
Diameter	160 mm	max.

Mechanical

Property	Value	Comment
Charpy impact energy, V-notch	40 J
Elastic modulus	210 GPa
Elongation	14 %	A5
Hardness, Brinell	290 [-]
Reduction of area	55 %
Tensile strength	800 - 1000 MPa
Yield strength	700 MPa

Chemical properties

Property	Value
Carbon	0.07 - 0.11 %
Chromium	3.7 - 4.1 %
Iron	Balance
Manganese	0.9 - 1.2 %
Molybdenum	0.4 - 0.6 %
Phosphorus	0.02 %
Silicon	0.1 - 0.4 %
Sulfur	0.015 - 0.035 %

Technological properties

Property
Application areas	It is used in highly stressed parts of the hydraulic industry.
Heat Treatment	Normalizing 930-960°C (Slow furnace cooling down to 650°C, after Air), Soft annealing: 850-920°C (Slow furnace cooling down to 650°C, after Air), Quenching: 940-960°C (Water), Tempering: Min.: 580°C (Air), Nitriding: Max.: 550°C
Hot forming	It is formable at 850-1100°C and should then cooled slowly (Oven, Air).
Processing history	Quenched and Tempered
Welding	It is weldable.

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