AISI 8620 • DIN 1.6523 • JIS SNCM220 Steel

What is 8620 Steel?

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 properties and 8620 steel composition as below.

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8620 Steel Grade Equivalent Chart

CountryUSAGermany/UK/FranceJAPANISO
StandardASTM A29/A29M-05EN 10084-2008JIS G4053-2008ISO 683/11:1987
Grades862020NiCrMo2-2 (1.6523)SNCM22020NiCrMo2

8620 Steel Chemical Composition

STANDC(%)Mn(%)P(%)S(%)Si(%)Cr(%)Mo(%)Ni(%)
ASTM A29/A29M-050.18-0.230.70-0.90≤0.035≤0.0400.15-0.350.40-0.600.15-0.250.40-0.70
EN 10084-20080.17-0.230.65-0.95≤0.025≤0.0350.400.35-0.700.15-0.250.40-0.70
JIS G4053-20080.17-0.230.60-0.90Max0.030Max0.0300.15-0.350.40-0.600.15-0.250.40-0.70
ISO 683/11:19870.17-0.230.65-0.95≤0.035≤0.0350.15-0.400.30-0.650.15-0.250.40-0.70

1.6523 Steel Physical Properties

PropertiesMetricImperial
Density7.85 g/cm³0.284 lb/in³

8620 Steel Mechanical Properties

PropertiesMetricImperial
Tensile strength530 MPa76900 psi
Yield strength385 MPa55800 psi
Elastic modulus190-210 GPa27557-30458 ksi
Bulk modulus (typical for steel)140 GPa20300 ksi
Shear modulus (typical for steel)80 GPa11600 ksi
Poisson’s ratio0.27-0.300.27-0.30
Izod Impact115 J84.8 ft.lb
Hardness, Brinell149149
Hardness, Knoop (converted from Brinell hardness)169169
Hardness, Rockwell B (converted from Brinell hardness)8080
Hardness, Vickers (converted from Brinell hardness)155155
Machinability (hot rolled and cold drawn, based on 100 machinability for AISI 1212 steel)6565

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 composition

8620 Steel Heat Treatment and Produced

Annealing

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

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.

Hardening

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.

Normalizing

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.

Steel Packing
Steel Transportation

1.6523 Steel Quality Certificate

8620 steel properties

1.6523 Steel Application

It is mainly used as a material for impact and wear resistant parts such as automotive bearings, camshafts and etc. And in the carburized condition, it is used for gears, ring gears, shafts and crankshafts.

8620 Steel Supply Range

Round Bar

Specification: diameter: 16mm – 800mm; length: 2000mm-5000mm
Surface: Black Surface/Bright Surface/ Grinded/Peeled/Turned

Sheet/Plate/Slab

Specification: thickness: 16-800mm; width: 205mm-810mm; length: 2000mm-5000mm
Surface: Black Surface/Bright Surface/ Grinded/Peeled/Turned

Notice

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

We specialize in 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 of it. Songshun Steel always with you.

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