Alloy steel with chromium, nickel, and molybdenum. This is a carburized steel with excellent temperability that is often used to obtain pieces with high requirements and complex shapes such as gears and large shafts subject to fatigue and vibrations.
Standard Reference: EN ISO 683-3: 2018 (Hot-rolled) | EN 10277: 2018 (Bright products)
| EUROPE | ITALY | GERMANY | FRANCE | UK | USA | ||
|---|---|---|---|---|---|---|---|
| UNI EN 10084:2008 UNI EN 10277-4:2008 |
(UNI 7846-78) | (DIN 17210-84) | (NFA35-551-86) | (BS970 pt.1--96) | ASTM A 29 | ||
| Grade | N° | Werkstoff | N° | ||||
| 17NiCrMo6-4 | 1.6566 | 18NiCrMo5 | - | - | 18NCD6 | 815M17 | - |
| 17NiCrMoS6-4 | 1.6569 | ||||||
| EUROPE | C | Si | Mn | P/max | S | Cr | Mo | Ni | Cu/max | Al | Pb |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 17NiCrMo6-4 | 0,14÷0,20 | 0,15÷0,40 | 0,60÷0,90 | 0,025 | ≤0,035 | 0,80÷1,10 | 0,15÷0,25 | 1,20÷1,60 | 0,40 | 0,020÷0,050 | - |
| 17NiCrMoS6-4 | 0,020÷0,040 | - | |||||||||
| 17NiCrMoS6-4Pb | 0,020÷0,040 | 0,15÷0,30 | |||||||||
| Note: 17NiCrMoS6-4 - 1.6569 not yet listed in ISO 683-3: 2016. | |||||||||||
| Hardness (HB) Treated to improve sherability (+S) |
Hardness (HB) Annealed to max. hardness requirements (+A) |
Hardness (HB) Treated to hardness range (+TH) |
Hardness (HB) Treated to ferrite-pearlite structure and hardness range (+FP) |
|||||
|---|---|---|---|---|---|---|---|---|
| ≤ 255 | ≤ 229 | ≥ 179 | ≤ 229 | ≥ 149 | ≤ 201 | |||
| Size (mm) |
+A*+ Turned (+A +SH) |
+A*+ Cold drawn (+A+C) |
FP**+ Turned (+FP +SH) |
FP**+ Cold drawn (+FP +C) |
|||
|---|---|---|---|---|---|---|---|
| Hardness HB max |
Hardness HB max |
Hardness HB |
Hardness HB |
||||
| 5≤d≤10 | - | 275 | - | - | |||
| 10<d≤16 | - | 265 | - | - | |||
| 16<d≤40 | 229 | 260 | 149÷201 | 149÷250 | |||
| 40<d≤63 | 229 | 255 | 149÷201 | 149÷245 | |||
| 63<d≤100 | 229 | 255 | 149÷201 | 149÷245 | |||
| *+A = annealed to maximum hardness requirement. **+FP = treated to ferrite-perlite structure and hardness range. For size <5 mm the mechanical properties may be agreed at the time of enquiry and order. |
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| Operation | °C |
|---|---|
| Hot forgings deformation | 900÷1150 |
| Carburizing temperature | 880÷980 |
| Core quenching temperature | 830÷870 |
| Case quenching temperature | 780÷820 |
| Tempering | 150÷200 |
| Limits of range | Hardness HRC at a distance from quenched end of test pieces (mm) | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1,5 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 20 | 25 | 30 | 35 | 40 | |||||||
| +H | Max | 48 | 48 | 47 | 46 | 45 | 44 | 42 | 41 | 38 | 36 | 35 | 34 | 33 | |||||
| Min | 40 | 40 | 37 | 34 | 30 | 28 | 27 | 26 | 24 | 23 | 22 | 21 | - | ||||||
| +HH | Max | 48 | 48 | 47 | 46 | 45 | 44 | 42 | 41 | 38 | 36 | 35 | 34 | 33 | |||||
| Min | 43 | 43 | 40 | 38 | 35 | 33 | 32 | 31 | 29 | 27 | 26 | 25 | 24 | ||||||
| +HL | Max | 45 | 45 | 44 | 42 | 40 | 39 | 37 | 36 | 33 | 32 | 31 | 30 | 29 | |||||
| Min | 40 | 40 | 37 | 34 | 30 | 28 | 27 | 26 | 24 | 23 | 22 | 21 | - | ||||||
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