Available Shapes
8620 Case Hardening Steel
AISI SAE 8620 steel is a commonly used low-alloy material for carburizing, with excellent carburizing response, good hardenability for most section sizes, it has many extensive applications due to its low cost, better machinability, and availability.
Applications
Analysis
Carburising / Case Hardening
Heat Treatment
Applications
In the carburized condition this alloy is used for gears, ring gears, shafts and crankshafts.
Analysis
| rbon | 0.18-0.23% | Chromium | 0.40-0.60% |
| Manganese | 0.70-0.90% | Nickel | 0.40-0.70% |
| Silicon | 0.15-0.35% | Sulphur | 0.035% max |
| Molybdenum | 0.15-0.25% | Phosphorous | 0.040% max |
Carburising / Case Hardening
Hardening is done by oil quench from 1675 F. See “Heat Treatment”. Carburizing is accomplished at the same 1650 to 1700 F range in a carburizing “pack” or environment, followed by oil quench for thin sections or a furnace cool for heavier (over 3/4″) sections. Following carburizing of heavy sections a reheat at 1575 F will enhance both case and core properties of the alloy.
Heat Treatment
Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of 8620 steel.
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