Model Number: hot forged steel bar -34 Brand Name: Unite Steel Key Specifications/Special Features: Forged steel bar 14NiCr14Steel group:Case hardening steelApplication:Highly stressed large sized components for aircraft and truck construction, and for general engineering purposes, e.g. gear wheels, cranks hafts, heavy-duty gear shafts.Features:20Cr2Ni4 is high intension of alloy cementation steel, has excellent comprehensive mechanical property. Its hardenability and obdurability higher than 12CrNi3. It's excellent forgeability.Related specifications:Germany W.Nr 1.5752 DIN 14NiCr14Great Britain BS970 – Part 3 – 1991 655 M13BS970 – 1955 EN36AGOST G55H13, G55M13
Japan JIS G 4052 SNC815H
JIS G 4102 SNC815
U.S.A. SAE 3310 9310
AISI E 3310 E9310
France 12NC15, 14NC12
Australia AS 1444-2007 – X3312/X3312H
UNS G33106/G93106

Quality Standard:
EN 10277 - 4 : 2008 Bright steel products. Technical delivery conditions. Case hardening steels
EN 10084: 2008 case hardening steels. Technical delivery conditions

Chemical composition(%):
Carbon 0.17-0.23
Silicon 0.17 -0.37
Manganese 0.30-0.60
Chromium 1.25-1.65
Phosphorous 0.04 max
Sulphur 0.04 max
Nickel 3.25~3.65

Process:EAF + LF + VD + forged + heat treatment(optional)

Size range:
Round:
Hot forged: Dia 80mm-1200mm

Surface finishes:
Black, peeled (K12), cold drawn, turned & polished (H10, H11), precision ground (H9, H8)

Ultrasonic test:According to SEP 1921-84

Range of application and heat treatment:
Cementation steel: gear wheels , crankshafts , gear components
Hardening: 830 - 850 °C (oil) Soft annealing: 620 - 650 °C Normalising : 830 - 860 °C