Carburizing
880 – 920 °C, followed by oil quench
Core Refining (pre-heat)
840 – 880 °C, oil or water quench
Tempering
150 – 200 °C (for case hardness)
Nitriding
Can be surface hardened further if supplied pre-hardened
- SAE8620
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.18 – 0.23 |
| Manganese (Mn) | 0.70 – 0.90 |
| Silicon (Si) | 0.15 – 0.35 |
| Nickel (Ni) | 0.40 – 0.70 |
| Chromium (Cr) | 0.40 – 0.60 |
| Molybdenum (Mo) | 0.15 – 0.25 |
| Sulphur (S) | ≤ 0.04 |
| Phosphorus (P) | ≤ 0.035 |
Grade Brief
Kuber Multimetals LLP – Trusted manufacturer, stockist & exporter of SAE 8620 with assured quality testing (Impact, Mechanical, Chemical, Bend Tests) and global delivery.
SAE 8620 is a low-alloy nickel–chromium–molybdenum case hardening steel. It is generally supplied in the as-rolled condition with a maximum hardness of HB 255. The steel offers high external strength with good internal/core toughness, resulting in excellent wear resistance.
Compared with related grades such as 8615 and 8617, AISI 8620 provides higher core strength. It also shows good flexibility during hardening treatments, which allows optimization of case/core properties.
Pre-hardened and tempered (uncarburized) 8620 can be further surface hardened by nitriding, but it does not respond well to flame or induction hardening because of its relatively low carbon content.
General Characteristics
- Type: Low alloy nickel–chromium–molybdenum case hardening steel
- Delivery Condition: Generally supplied in the as-rolled condition (max hardness ~HB 255)
- Strength: High external strength with good core toughness
- Wear Resistance: Excellent after carburizing and heat treatment
- Comparisons: Higher core strength than 8615 and 8617 grades
Mode of Supply
Kuber Multi Metals is the largest stockiest and supplier of SAE8620 tool steel in flat, square and round bar. We provide steel in all sizes as your requirements. SAE8620 die steel is available in flat, square and round shape. Consult our team who will assist you for SAE8620 steel query.
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 620 – 850 MPa |
| Yield Strength | ~ 415 MPa |
| Elongation | 25 – 30 % |
| Hardness (as rolled) | ≤ 255 HB |
| Core Hardness after Carburizing | ~ 33 – 40 HRC |
| Case Hardness (after carburizing, quenching & tempering) | 58 – 62 HRC |
Heat Treatment & Processes
Application
Gears & gear shafts, Crankshafts, Fasteners & pins, Heavy-duty automotive & industrial components requiring wear resistance with toughness
Conclusion
AISI 8620 (SAE 8620) is a low-alloy nickel chromium molybdenum case hardening steel that has high surface hardness, good wear resistance, and a tough, strong core. Being stronger in core than related grades such as 8615 and 8617, it is common in heavy-duty automotive and industrial castings. Upon carburizing and heat treatment, 8620 provides a hard, wear-resistant case and core ductile and tough, which is best suited to gears, shafts, crankshafts, and fasteners requiring durability and reliability.
Addition to other Grades
HCHCR-D2 Steel , HCHCR-D3 Steel , P20+Ni Steel , P20 Steel , P20 HH , Stavax ESR , DB6 Steel , H13 Steel, H11 Steel, H21 Steel, H10 Steel, H12 Steel, M2 Steel, M35 Steel, M42 Steel, T1 Steel, C 45, MS Steel, En 31, En 24 , En 353 , En 19 , En 8 , En 8D , En 9 , En 47 , 20 Mncrs , SAE8620 , DIN 2379 Steel, DIN 2080 Steel, DIN 2738 Steel, DIN 2311 Steel, DIN 2714 Steel, DIN 2344 Steel , DIN 2343 Steel, DIN 2581 Steel, DIN 2365 Steel, DIN 2606 Steel, DIN 3343 Steel, DIN 3243 Steel, DIN 3247 Steel, DIN 3355 Steel , AISI D2 Steel, AISI D3 Steel, AISI P20+Ni Steel, AISI P20 Steel, AISI L6 Steel, AISI H13 Steel, AISI H11 Steel, AISI H21 Steel, AISI H10 Steel, AISI H12 Steel, AISI M2 Steel , AISI M35 Steel, AISI M42 Steel , AISI T1 Steel
