Model Number: hot forged steel bar -22
Brand Name: Unite Steel
Key Specifications/Special Features:
DescriptionsVCNMO200 is a heat treatable, low alloy steel containing nickel, chromium and molybdenum. It is known for its toughness and capability of developing high strength in the heat treated condition while retaining good fatigue strength.ApplicationsFor permanently stressed components with large cross sections for automotive and mechanical engineering. For economic performance under severe dynamic stress, parts must be designed for optimum strength or toughness.
Related specifications:
Germany: DIN 30CrNiMo8 Wr.N 1.6580
Great Britain: EN 10269 30CrNiMo8, BS 823M30
USA: AISI/SAE 4340
France: AFNOR 30NCD8
ISO 31CrNiMo8
Chemical composition (%):
Carbon: 0.26-0.34
Silicon: 0.40 max
Manganese: 0.50-0.80
Phosphorus: 0.025max
Sulphur: 0.035 max
Chromium: 1.80-2.20
Nickel: 1.80-2.20
Molybdenum: 0.30-0.50
Process: EAF + LF + VD + Forged + Heat Treatment(optional)
Size range:
Round:
Hot Forged: 80mm-1500mm
Flat:
Hot forged: Thickness:150-600mm Width: up to 1600mm
Surface finishes:
Black, peeled, cold drawn, turned & polished, precision ground
Test: Ultrasonic test according to SEP 1921-84
Normalizing
Temperature: 850-880 oC.
Hardening
Harden from a temperature of 830-880oC followed by oil quenching.
Tempering
Tempering temperature: 540-680oC.