Alloy steels contain a wide range of steels whose compositions exceed the limitations of C, Mo, Cr, Va, Mn, Ni, Si, and B fixed for carbon steels. These steels are more responsive to mechanical and heat treatments than carbon steels. AISI 8620 alloy steel is a common, carburizing alloy steel. This alloy steel is flexible during hardening treatments, thus enabling improvement of case/core properties. The following datasheet will provide more details about AISI 8620 alloy steel.
Dimensions Hot Rolled Round: dia.16-300 mm Forged Round: dia.150-1200 mm Cold Drawn Round: dia.6-30 mm Forged Block: 150-1000 x 200-1900 mm
Delivery Condition EAF+LF+VD, Hot Rolled or Forged or Cold Drawn, Annealed or Q+T, Black surface or Machined surface, UT SEP1921 Class3 C/c or D/d
AISI / SAE
DIN / W.Nr
Other designations that are equivalent to AISI 8620 alloy steel include the following:
AFNOR 20 NCD 2
AFNOR 22 NCD 2
UNI 20 NiCrMo 2
JIS SNCM 21
JIS SNCM 21 H
B.S. 805 H 20
B.S. 805 M 20
MIL SPEC MIL-S-16974
Chemical Composition (%)
Applications The AISI 8620 can be used for a number of medium-strength applications such as camshafts, fasteners, gears, and chains/chain pins.
The mechanical properties of annealed AISI 8620 alloy steel are outlined in the table below.
Bulk modulus (typical for steel)
Shear modulus (typical for steel)
Hardness, Knoop (converted from Brinell hardness)
Hardness, Rockwell B (converted from Brinell hardness)
Hardness, Vickers (converted from Brinell hardness)
Machinability (hot rolled and cold drawn, based on 100 machinability for AISI 1212 steel)