1.APPLICATIONS:
Heavy-duty arbors, bushings, wear pins,bearings, sprockets, gears
and shafts etc.
Or can be used for high tensile applications uncarburised but
through hardened and tempered. Severely stressed components for
mechanical engineering and automobile industry .
2.RELATED SPECIFICATIONS:
| Germany | W.Nr. 1.6587 |
| Great Britain | EN 17CrNiMo7/EN 10084 DIN 18CrNiMo7-6/EN355, 822A17, 822H17, 817M17 |
| USA | AISI 4820 |
| ISO | 683-11 18CrNiMo7/683-17 18CrNiMo7-6 |
3.Chemical Composition (%):
Carbon 0.14-0.19
Silicon 0.15-0.40
Manganese 0.40-0.60
Phosphorus 0.035max
Sulphur 0.035 max
Nickel 1.40-1.70
Chromium 1.50-1.80
Molybdenum 0.25-0.35
4.Process: EAF+LF+VOD+ Rolled+Heat Treatment(optional)
SIZE RANGE:
Round:
Hot Rolled: 10mm-350mm
SURFACE FINISHES:
Black, Peeled(K12), Cold Drawn, Turned & Polished(H10, H11),
Precision Ground(H9, H8)
Test: Ultrasonic test according to SEP 1921-84
Soft Annealing
Heat to 650-700oC, cool slowly in furnace. This will produce a
maximum Brinell hardness of 229.
Intermediate Annealing: 630-650oC.
Hardening
Carburising: 880-980oC.
Core Hardening: 830-870oC, water.
Case Hardening: 780-820oC, water.
Normalizing
Normalizing: 850-880oC, air.
Tempering
Tempering temperature: 150-200oC.
Soft annealed treated: max. 229 HB.
Treated for cold shearability: max. 255 HB.
Treated for strength: max. 229 HB.
Treated for ferite and pearlite structure and hardness range:
159-207 HB.
