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Material 1.6587
Case hardening steel
The material 1.6587 is a chromium-nickel-molybdenum alloyed case-hardening steel. 1.6587 is used for highly stressed components. The material achieves a very high core strength and high toughness. A typical field of application is gear construction, for example.
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Standards
| HDIN / EN | US-Standard | AFNOR | UNI | JIS | request |
|---|---|---|---|---|---|
| 18CrNiMo7-6 17CrNiMo6 | request |
Material Category: Case hardening steel
Applications
The material 1.6587 is used for highly stressed gear parts.
18NiCrMo7-6 is the best-known material for manufacturing gears.
Heat Treatment
Soft annealing (+A) at 650 - 700 C°, cooling in oil or polymer
Carburizing at 880 - 980 C°, cooling in oil or polymer
Core hardening at 830 - 870 C°, cooling in oil or polymer
Case hardening at 780 - 820 C°, cooling in oil or polymer
Draining at 150 - 200 C°, cooling in the air
Weldability
The material 1.6587 is weldable.
Chemical Composition
| C % | Si % | Mn % | P % | S % | Cr % | Mo % | Ni % |
| 0,15 - 0,21 | max 0,40 | 0,50 - 0,90 | max 0,025 | max 0,035 | 1,50 - 1,80 | 0,25 -0,35 | 1,40 - 1,70 |
Product Specifications
DIN EN 10084
DIN EN 10277
DIN EN ISO 683-3
DIN EN ISO 683-17
Mechanical Properties
| Stabstahl | |
| behandelt auf Härtespanne | Härte [HB 30] |
| <= 150 mm | 179 - 229 HB 30 |
| behandelt auf Ferrit-Perlit Gefüge und Härtespanne | Härte [HB 30] |
| <= 60 mm | 179 - 229 HB 30 |
| weichgeglüht | Härte [HB 30] | <= 229 HB 30 |
| nach Einsatzhärtung, im Kern | Streckgrenze (Re) | Zugfestigkeit (Rm) | Bruchdehnung (A5, 65) | Einschnürung (Z) | Kerbschlagarbeit KV (ISO-V/Charpy-V) |
| <= 11 mm | >= 835 N/mm² | 1.180 - 1.420 N/mm² | >= 7 % | >= 30 % | >= 41 Joule |
| <= 30 mm | >= 785 N/mm² | 1.080 - 1.320 N/mm² | >= 8 % | >= 35 % | >= 41 Joule |
| <= 63 mm | >= 685 N/mm² | 980 - 1.270 N/mm² | >= 8 % | >= 35 % |
Material request