SAE 8620

SAE 8620

Carburizing Steel For High-Performance Components

SAE 8620 is a low-carbon nickel-chromium-molybdenum alloy steel designed for case hardening, providing a hard, wear-resistant surface with a tough and ductile core.

Available Forms: Round Bars | Flats | Blocks | Custom Sizes

Key Features
Hard Surface. Tough Core. Reliable Performance.

  • Designed For Carburizing Applications Where High Surface Hardness Is Required.
  • The Low-carbon Composition Supports A Tougher Core After Case Hardening.
  • Suitable For Components Exposed To Repeated Contact, Friction And Mechanical Wear.
  • Nickel, Chromium And Molybdenum Contribute To Hardenability And Allow Flexibility In Heat-treatment Processes.
  • Suitable For Components Subjected To Repeated Mechanical And Contact Stresses.
  • Used For Gears, Camshafts, Fasteners, chains, and chain pins.
Category:

Technical Specifications

SAE 8620 — Technical Specifications

Property Specification
Material SAE 8620
Steel Type Nickel-Chromium-Molybdenum Carburizing Alloy Steel
UNS G86200
DIN / EN Designation 1.6523*
Carbon (C) 0.18–0.23%
Silicon (Si) 0.15–0.35%
Manganese (Mn) 0.70–0.90%
Chromium (Cr) 0.40–0.60%
Nickel (Ni) 0.40–0.70%
Molybdenum (Mo) 0.15–0.25%
Phosphorus (P) 0.035% Max
Sulphur (S) 0.040% Max
Available Forms Round Bars, Flats, Blocks*
Supply Full Length / Cut-to-Size

Chemical Composition

Element Typical Composition
Carbon (C) 0.18–0.23%
Silicon (Si) 0.15–0.35%
Manganese (Mn) 0.70–0.90%
Chromium (Cr) 0.40–0.60%
Nickel (Ni) 0.40–0.70%
Molybdenum (Mo) 0.15–0.25%
Phosphorus (P) ≤ 0.035%
Sulphur (S) ≤ 0.040%
Iron (Fe) Balance

Applications

Where Sae 8620 Is Used

Gears
Suitable For Gears Requiring A Hard Surface And Tough Core.

Camshafts
Used In Automotive And Mechanical Components Exposed To Repeated Contact.

Shafts & Pinions
Suitable For Power-transmission Components.

Fasteners
Used For Selected High-strength Engineering Fastening Applications.

Chain & Chain Pins
Suitable For Components Exposed To Repeated Mechanical Loading And Wear.

Machine Components
For Medium-strength Components Requiring Case-hardening Capability.

Published AISI 8620 Applications Include Camshafts, Fasteners, Gears, chains, and chain pins.

Heat Treatment

Heat Treatment For Controlled Performance

SAE 8620 Is Particularly Suited To Carburizing And Case-hardening Processes. Published data demonstrate carburizing followed by reheating, oil quenching, and tempering.

Carburizing
Typically performed around 925 °C in published treatment examples to enrich the surface with carbon.

Hardening
Following Carburizing, the material can be reheated to approximately 845 °C and oil quenched in representative treatment schedules.

Tempering
Published Examples Include Tempering Around 150°c, While Other Treatment Conditions Use Approximately 230°c Depending On The Required Properties.

Available Forms

Available in the form you need

Round bars
Suitable for gears, shafts, pins, camshafts and machined components.

Flats
For specialised engineering and machining requirements.

Blocks
Suitable for component manufacturing and machining.

Custom sizes
Material prepared according to customer-specified dimensions, subject to availability.

Full length
Available according to TSI Metals’ stock and size requirements.

Supply Condition

Supply Condition
Annealed
Suitable For Machining Before Subsequent Processing Or Heat Treatment.

Normalized
Provides A Refined And More Uniform Material Structure.

Carburizing Condition
Suitable For Subsequent Case-hardening Processes.

Hardened & Tempered
For Applications Requiring Developed Strength And Hardness.

Full Length
Supplied According To Available Stock Dimensions.

Cut-to-size
Prepared According To Customer Requirements.

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