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
| GRADE | C | Si | Mn | P | S | Cr | Mo | Ni |
| 17CrNiMo6/1.6587 | 0.15-0.20 | ≤ 0.40 | 0.40-0.60 | ≤ 0.035 | ≤ 0.035 | 1.50-1.80 | 0.25-0.35 | 1.40-1.7 |
Heat Treatment
| Heat Treatment Process | Temperature Range | Holding Time | Cooling Method | Maximum Hardness |
|---|---|---|---|---|
| التطبيع | Nominal: 840-890°C | Several hours (N/A) | Cooling in air | N/A |
| التلدين | Nominal: 630-650°C | N/A | Cool slowly in furnace | 229 HB |
| Hardening & Tempering (QT) | Nominal Hardening temperature: 830-865°C | N/A | Quench in oil | N/A |
| N/A | N/A | Tempering as soon as possible when the temperature low to ambient temperature | N/A | |
| N/A | N/A | Heat the steel carefully to a suitable temperature selected by reference to a tempering chart or table | N/A | |
| N/A | N/A | The usual tempering temperature is 600°C which depending on the actual requirements | N/A | |
| N/A | N/A | Keep the material out of the furnace, then cool in air | N/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
Application
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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