AISI 8620 Tool Steel | 1.6523 | SNCM220 Alloy Steel

AISI 8620 alloy steel is a common, carburizing alloy steel. This alloy steel is flexible during hardening treatments,and thus enabling improvement of case/core properties. The following datasheet will provide more details about AISI 8620 tool steel.


Supply Form of 8620 Tool Steel -20CrNiMo Alloy Steel

Supply Range of AISI 8620 Tool Steel

8620 Steel Round Bar: diameter 1mm – 400mm

AISI 8620  Steel Plate: thickness 1 –500mm x width 200– 1400mm

Steel Block: 210mm x 500-810mm

8620 tool steel

8620 Steel for bearings and gears


Chemical Composition of 8620 Tool Steel Material
Element Content (%)
Iron, Fe 96.895-98.02
Manganese, Mn 0.700-0.900
Nickel, Ni 0.400-0.700
Chromium, Cr 0.400-0.600
Carbon, C 0.180-0.230
Silicon, Si 0.150-0.350
Molybdenum, Mo 0.150-0.250
Sulfur, S ≤ 0.0400
Phosphorous, P ≤ 0.0350

8620 Tool Steel Material Equivalent and Related Speciations

 

USA German Japan China ISO
AISI 8620 DIN 21NiCrMo2 JIS SNCM220 GB 20CrNiMo ISO 20CrNiMo
ASTM  A534 1.3247

AISI 8620 Tool Steel Material 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 ft.lb
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

Forged of 8620 Steel metal material

The alloy may be forged at 2200 F down to 1800 F prior to the hardening heat treatment,or carburizing.


Heat Treatment of AISI 8620 Steel
  • 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.And improved carburized case and core properties can be obtained by furnace cooling from carburizing at 1650 – 1700 F and then reheating to 1575 F.
  • Tempering Of 8620 Tool Steel
  • And the carburized parts is done at 250 to 300 F and this will result in the alloy having a core strength of approximately 135 ksi minimum with Rockwell C case hardness of 90. Tempering of heat treated and water quenched parts (not carburized) is done at 400 F to 1300 F with greater hardness the lower the tempering temperature.

Application of AISI 8620 tool Steel

The AISI 8620 can be used for a number of medium-strength applications such as camshafts, fasteners, gears, and chains/chain pins.


Quality Assured of ASTM 8620 Steel

Quality assured by ISO 9001:2008 quality management system. Whatsmore, Our all 8620 tool steel all had by SEP 1921-84 ultrasonic inspection (UT Test). Quality Grade: E/e, D/d, C/c.

If you have any 8620 Tool steel inquiry and question for Price, Application, hot treatment, Please don’t hesitate contact us.

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