17CrNiMo6/1.6587 Alloy Steel

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17CrNiMo6/1.6587 Alloy Steel

17CrNiMo6/1.65827 Steel is is a heat treatable, low alloy steel containing nickel, chromium and molybdenum as per DIN Germany standard which is known for its toughness and capability of developing high strength in the heat treated condition while retaining good fatigue strength.

Chemical Composition

17CrNiMo6/1.65870.15-0.20≤ 0.400.40-0.60≤ 0.035≤ 0.0351.50-1.800.25-0.351.40-1.7

Heat Treatment

Heat Treatment ProcessTemperature RangeHolding TimeCooling MethodMaximum Hardness
التطبيعNominal: 840-890°CSeveral hours (N/A)Cooling in airN/A
التلدينNominal: 630-650°CN/ACool slowly in furnace229 HB
Hardening & Tempering (QT)Nominal Hardening temperature: 830-865°CN/AQuench in oilN/A
N/AN/ATempering as soon as possible when the temperature low to ambient temperatureN/A
N/AN/AHeat the steel carefully to a suitable temperature selected by reference to a tempering chart or tableN/A
N/AN/AThe usual tempering temperature is 600°C which depending on the actual requirementsN/A
N/AN/AKeep the material out of the furnace, then cool in airN/A

Mechanical Properties

Tensile strength: 980-1270MPa
Yield point: 780MPa
3.Percentage reduction of area after fracture: 40%
4.Elongation after fracture: 11%
5.Impact test (+20°C):  Longitud – 45~50J


It is used for gearbox gear, aero-engine bearing, precision instrument, precision spindle bearing, etc., can also be used for gear application with large loads.


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