AISI 8620 Steel Round Bar Sheet Plate, DIN 1.6523, JIS SNCM220

8620 steel has high hardenability without temper brittleness. It is also called DIN 1.6523 and JIS SNCM220 steel. It also has good weldability, little tendency to form cold cracks, and good machinability and cold strain plasticity. It is used to make gears, shafting, bolting, springs, hand tools and etc. 8620 steel round bar sheet plate properties and 8620 steel composition as below.

AISI 8620 Steel Round Bar Plate Sheet Supply Range
Round BarDiameter: 16mm – 800mm; length: 2000mm-5000mm
Other specifications can be customized.
Black Surface/Bright Surface/ Grinded/Peeled/Turned
Sheet/Plate/Slab Thickness: 16-800mm; width: 205mm-810mm;
length: 2000mm-5000mm
Other specifications can be customized.
Black Surface/Bright Surface/ Grinded/Peeled/Turned

8620 Steel Grade Equivalent Chart

Country USA Germany/UK/France JAPAN ISO
Standard ASTM A29/A29M-05 EN 10084-2008 JIS G4053-2008 ISO 683/11:1987
Grades 8620 20NiCrMo2-2 (1.6523) SNCM220 20NiCrMo2

1.6523 Steel Chemical Composition

STAND C(%) Mn(%) P(%) S(%) Si(%) Cr(%) Mo(%) Ni(%)
ASTM A29/A29M-05 0.18-0.23 0.70-0.90 ≤0.035 ≤0.040 0.15-0.35 0.40-0.60 0.15-0.25 0.40-0.70
EN 10084-2008 0.17-0.23 0.65-0.95 ≤0.025 ≤0.035 0.40 0.35-0.70 0.15-0.25 0.40-0.70
JIS G4053-2008 0.17-0.23 0.60-0.90 Max0.030 Max0.030 0.15-0.35 0.40-0.60 0.15-0.25 0.40-0.70
ISO 683/11:1987 0.17-0.23 0.65-0.95 ≤0.035 ≤0.035 0.15-0.40 0.30-0.65 0.15-0.25 0.40-0.70

1.6523 Steel Physical Properties

Properties Metric Imperial
Density 7.85 g/cm³ 0.284 lb/in³

1.6523 Steel Mechanical Properties

Properties Metric Imperial
Tensile strength 530 MPa 76900 psi
Yield strength 385 MPa 55800 psi
Elastic modulus 190-210 GPa 27557-30458 ksi
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (typical for steel) 80 GPa 11600 ksi
Poisson’s ratio 0.27-0.30 0.27-0.30
Izod Impact 115 J 84.8
Hardness, Brinell 149 149
Hardness, Knoop (converted from Brinell hardness) 169 169
Hardness, Rockwell B (converted from Brinell hardness) 80 80
Hardness, Vickers (converted from Brinell hardness) 155 155
Machinability (hot rolled and cold drawn, based on 100 machinability for AISI 1212 steel) 65 65

8620 Steel Application


AISI 8620 alloy steel is mainly used as a material for impact and wear resistant parts such as automobile bearings, camshafts, etc. In the carburized state it is used for gears, ring gears, shafts and crankshafts.It can also be used for the claws and cone bodies of the roller cone bits for oil drilling and metallurgical open-pit mines, and to manufacture the forgings of the connecting rod valve section of the steam turbine gear whole rotor internal combustion engine.

1.6523 Steel Characteristics

1.It is a low alloy nickel, chromium, molybdenum case hardening steel.
2.It has good external and internal strength, so there with high wear-resistant.
3.It is usually used to make many medium-strength tools.

8620 Steel Round Bar Sheet Plate Heat Treatment and Produced

It may be given a full anneal by heat to 820℃ – 850℃, and hold until temperature is uniform throughout the section and cool in the furnace or air cooled.

Tempering of heat treated and water quenched parts of it (not carburized) is done at 400 F to 1300 F to improve case toughness with minimal effect on its hardness. This will also reduce the possibility of grinding cracks.

It will be austenitized at around 840°C – 870°C, and oil or water quenched depending upon section size and intricacy. And cool it in Air or oil required.

1675ºF (910ºC) and air cool. This is another method of improving machinability in 8620 steel material; normalizing might also be used prior to the case hardening.

Heat Treatment
This alloy may be hardened by heating to 1500 F followed by a water quench. Carburize at 1650 to 1700 F in an appropriate carburizing medium and oil quench to harden. Improved carburized case and core properties can be obtained by furnace cooling from carburizing at 1650 – 1700 F and then reheating to 1575 F.

AISI 8620 Steel Round Bar Plate Sheet Supply

We have our own cutting and processing equipment. Specifications can be cut and customized according to your requirements.

We are a professional special steel stockist and supplier with a high-quality stand for many years. As a professional 8620 steel material supplier, please contacts us for any request for it. Songshun Steel always with you.

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