About

AISI 8620H is a low-carbon, nickel-chromium-molybdenum alloy steel, widely used for its excellent case hardening characteristics. Its composition provides an optimal balance of surface wear resistance and core toughness after carburization or other surface-hardening processes. The “H” suffix denotes enhanced hardenability, making it well-suited for parts requiring a hard exterior and a ductile, fatigue-resistant core. 8620H offers good machinability in both annealed and heat-treated conditions, supporting precision manufacturing of high-stress components such as gears, shafts, and bushings. It is particularly favored in applications where surface durability must be combined with structural resilience.

Technical Details

Accuracy

±0.2% (lower limit of ±0.13 mm)

Density

7.85 g/cm³

Min. wall thickness

-

Tensile strength

620 - 930 MPa

Tensile modulus

200000 - 210000 MPa

Tensile elongation

20 - 30%

Flexural strength

650 - 950 MPa

Flexural modulus

200000 - 210000 MPa

HDT (0.45 MPa)

400 - 425°C

HDT (1.8 MPa)

370 - 390°C

Embossing

min. 0.3 mm

Engraving

min. 0.3 mm

Warping risk

N/A

Maximum printing dimensions

1,200 × 1,100 × 1,000 mm