AISI 8620 Round Bar | 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
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.
