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18crnimo7-6/4317/17CrNiMo6 high-quality professional hot forged steel rings
Description:
18CrNiMo7- 6 Chrome-Nickel-Moly Carburising Steel generally supplied annealed to HB 229max. Carburised and heat treated it develops a hard wear resistant case to HRC 60-63 and a tough strong core with a typical tensile strength range of 900-1300 MPa, in small to fairly large sections.
APPLICATIONS:
Heavy-duty arbors, bushings, Cam Followers, wear pins, bearings, sprockets, gears and shafts, Clutch Dogs, Compressor Bolts, Extractors, Fan Shafts, Heavy Duty Gears, Pump Shafts, Sprockets, Tappets, Wear Pins, Wire Guides etc.. Or can be used for high tensile applications uncarburised but through hardened and tempered. It is used extensively by all industry sectors for components and shafts requiring high surface wear resistance, high core strength and impact properties.
Related specifications:
Australia : AS 1444-1996 X4317 or X4317H
Germany: EN10084-1998 1.6587 18CrNiMo6 or
1.6587H 18CrNiMo7-6H
Werkstoff 1.6587 18CrNiMo7-6 or 17CrNiMo6
DIN 17210 17CrNiMo6
Great Britain BS970: PART 3: 1991 820M17/822M17
BS970: 1955 - EN354/EN355
U.S.A. SAE 4317
AISI 4317
Chemical Composition (%):
Carbon 0.15-0.20
Silicon 0.4 max
Manganese 0.40-0.60
Phosphorus 0.04 max
Sulphur 0.04 max
Chromium 1.50-1.80
Molybdenum 0.25-0.35
Nickel: 1.40-1.70
Process: EAF+LF+VOD+Forged+Heat Treatment(optional)
SIZE RANGE:
OD up to 8,000mm; ID up to 7,800mm; Thickness up to 500mm
SURFACE FINISHES:
Black, Peeled (K12), Cold Drawn, Turned & Polished (H10, H11), Precision Ground (H9, H8)
Heat Treatment:
Hot working: 850-1150oC
Case hardening: Double hardeningoC
Carburising: 900-950oC
Soft annealing: 650-700oC
Surface hardening: 800-930oC
Tempering: 150-210oC
UT:ASTM A 388 or according to customers' requirement
PACKAGE: