Active Member
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[China]
Address: Room 1109, Loft Office, Green Land International Plaza, No. 275-8 Guoding East Road, Shanghai 200433, P.R. China. (admin(a)shunitesteel.com)
Contact name:Eric
SHANGHAI UNITE STEEL |
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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
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
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
Process: EAF+LF+VOD+Forged+Rolled+Heat Treatment(optional)
SIZE RANGE:
Round: 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.
Certificate of Quality: issued in English, in addition the normal terms, production process, the mechanical property yield strength, tensile strength, elongation and hardness, forged ratio, UT test result, Grain size, heat treatment methods and the sample of is shown on the Certificate of Quality.
Marking: Heat No. will be cold stamped and Steel grade, diameter mm, length mm, and the manufacturer LOGO and weight kg is painted.
