8620 is a low-carbon nickel-chromium-molybdenum alloy steel designed for carburizing and case hardening. It features excellent toughness, good core ductility and fine grain structure. After carburizing, quenching and tempering, the surface gains high hardness and wear resistance while the core remains tough to withstand impact and heavy loads. It has great machinability and stable heat treatment performance, commonly used for gears, pinions, shafts, sprockets and various transmission mechanical

Advantage

1.Perfect combination of hard wear-resistant surface and tough impact-resistant core 2.Excellent carburizing performance and uniform case depth after heat treatment 3.Fine grain structure, low distortion and stable dimensional accuracy 4.Good machinability and cost efficiency for mass mechanical component production

Ingredient

• C
• 0.18 ~ 0.23
• Ni
• 0.40 ~ 0.70
• Cr
• 0.40 ~ 0.60
• Mo
• 0.15 ~ 0.25
• Mn
• 0.70 ~ 0.90
• Si
• 0.15 ~ 0.35
• P
• ≤0.035
• S
• ≤0.040
• Fe
• Balance

• Board
• Stick
• Pipe

Title

8620 Board

Size

0.5mm – 100mm

Length

1000mm – 6000mm (customizable)

Production

Hot rolled + Annealed

Surface

Pickled / 2B / Polished

Processing

Hot rolled + Annealed

Standard

• USA
• ASTM A829 / AISI 8620
• China
• GB/T 3274‑2017、GB/T 11251‑2021

Mechanics

• STATE
• RP
• YIELD
• EXTEND
• SHRINK
• HARDNESS
• IMPACT
• Annealed
• ≥635 MPa
• ≥390 MPa
• ≥20 %
• ≥50 %
• ≤212 HBW
• ≥30 J
• Annealed
• ≥600 MPa
• ≥360 MPa
• ≥20 %
• ≥50 %
• ≤212 HBW
• ≥30 J

• STATE
• Annealed
• RP
• ≥635 MPa
• YIELD
• ≥390 MPa
• EXTEND
• ≥20 %
• SHRINK
• ≥50 %
• HARDNESS
• ≤212 HBW
• IMPACT
• ≥30 J
• STATE
• Annealed
• RP
• ≥600 MPa
• YIELD
• ≥360 MPa
• EXTEND
• ≥20 %
• SHRINK
• ≥50 %
• HARDNESS
• ≤212 HBW
• IMPACT
• ≥30 J

Title

8620 Stick

Size

8mm – 300mm

Length

1000mm – 6000mm (customizable)

Production

Hot rolled + Annealed

Surface

Black / Peeled / Polished

Processing

Hot rolled + Annealed

Standard

• USA
• ASTM A322 / AISI 8620
• CHINA
• GB/T 3077‑2015、GB/T 4356‑2021

Mechanics

• STATE
• RP
• YIELD
• EXTEND
• SHRINK
• HARDNESS
• IMPACT
• Annealed
• ≥635 MPa
• ≥390 MPa
• ≥20 %
• ≥50 %
• ≤212 HBW
• ≥30 J
• Annealed
• ≥600 MPa
• ≥360 MPa
• ≥20 %
• ≥50 %
• ≤212 HBW
• ≥30 J

• STATE
• Annealed
• RP
• ≥635 MPa
• YIELD
• ≥390 MPa
• EXTEND
• ≥20 %
• SHRINK
• ≥50 %
• HARDNESS
• ≤212 HBW
• IMPACT
• ≥30 J
• STATE
• Annealed
• RP
• ≥600 MPa
• YIELD
• ≥360 MPa
• EXTEND
• ≥20 %
• SHRINK
• ≥50 %
• HARDNESS
• ≤212 HBW
• IMPACT
• ≥30 J

Title

8620 Pipe

Size

6mm – 500mm OD, 1mm – 50mm WT

Length

1000mm – 12000mm (customizable)

Production

Hot finished + Annealed / Cold drawn + Annealed

Surface

Pickled / Bright annealed / Polished

Processing

Hot finished + Annealed / Cold drawn + Annealed

Standard

• USA
• ASTM A519 / AISI 8620
• China
• GB/T 8162‑2018、GB/T 8163‑2018

Mechanics

• STATE
• RP
• YIELD
• EXTEND
• SHRINK
• HARDNESS
• IMPACT
• Annealed
• ≥635 MPa
• ≥390 MPa
• ≥20 %
• ≥50 %
• ≤212 HBW
• ≥30 J
• Annealed
• ≥600 MPa
• ≥360 MPa
• ≥20 %
• ≥50 %
• ≤212 HBW
• ≥30 J

• STATE
• Annealed
• RP
• ≥635 MPa
• YIELD
• ≥390 MPa
• EXTEND
• ≥20 %
• SHRINK
• ≥50 %
• HARDNESS
• ≤212 HBW
• IMPACT
• ≥30 J
• STATE
• Annealed
• RP
• ≥600 MPa
• YIELD
• ≥360 MPa
• EXTEND
• ≥20 %
• SHRINK
• ≥50 %
• HARDNESS
• ≤212 HBW
• IMPACT
• ≥30 J