18crnimo7-6 / 4317 / 17CrNiMo6 Forged Steel Rings 8000 Mm Max OD 500 Mm Thickness

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: