9310 is a premium low-carbon nickel-chromium-molybdenum carburizing alloy steel. With high nickel content and ultra-low carbon composition, it provides exceptional case hardness after carburizing while maintaining outstanding core toughness and impact resistance. It features excellent deep hardenability, superior fatigue strength, fine grain structure and stable mechanical properties at low temperatures. Widely used for heavy-duty gears, aircraft transmission parts, high-load shafts and critical

Advantage

1.Outstanding deep hardenability, ensuring uniform performance for large-section components 2.Excellent low-temperature toughness and high impact resistance under severe working conditions 3.High surface hardness and wear resistance after carburizing, combined with tough core performance 4.Superior fatigue strength and stable dimensional accuracy for long-term heavy-load service

Ingredient

• C
• 0.07 ~ 0.13
• Ni
• 3.00 ~ 3.50
• Cr
• 1.00 ~ 1.40
• Mo
• 0.08 ~ 0.15
• Mn
• 0.40 ~ 0.70
• Si
• 0.15 ~ 0.35
• P
• ≤0.015
• S
• ≤0.015
• Fe
• Balance

• Board
• Stick
• Pipe

Title

AISI 9310 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 9310
• CHINA
• GB/T 3274‑2017、GB/T 11251‑2021

Mechanics

• STATE
• RP
• YIELD
• EXTEND
• SHRINK
• HARDNESS
• IMPACT
• Annealed
• ≥830 MPa
• ≥540 MPa
• ≥18 %
• ≥55 %
• ≤240 HBW
• ≥35 J
• Annealed
• ≥790 MPa
• ≥510 MPa
• ≥18 %
• ≥55 %
• ≤240 HBW
• ≥35 J

• STATE
• Annealed
• RP
• ≥830 MPa
• YIELD
• ≥540 MPa
• EXTEND
• ≥18 %
• SHRINK
• ≥55 %
• HARDNESS
• ≤240 HBW
• IMPACT
• ≥35 J
• STATE
• Annealed
• RP
• ≥790 MPa
• YIELD
• ≥510 MPa
• EXTEND
• ≥18 %
• SHRINK
• ≥55 %
• HARDNESS
• ≤240 HBW
• IMPACT
• ≥35 J

Title

AISI 9310 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 9310
• China
• GB/T 3077‑2015、GB/T 4356‑2021

Mechanics

• STATE
• RP
• YIELD
• EXTEND
• SHRINK
• HARDNESS
• IMPACT
• Annealed
• ≥830 MPa
• ≥540 MPa
• ≥18 %
• ≥55 %
• ≤240 HBW
• ≥35 J
• Annealed
• ≥790 MPa
• ≥510 MPa
• ≥18 %
• ≥55 %
• ≤240 HBW
• ≥35 J

• STATE
• Annealed
• RP
• ≥830 MPa
• YIELD
• ≥540 MPa
• EXTEND
• ≥18 %
• SHRINK
• ≥55 %
• HARDNESS
• ≤240 HBW
• IMPACT
• ≥35 J
• STATE
• Annealed
• RP
• ≥790 MPa
• YIELD
• ≥510 MPa
• EXTEND
• ≥18 %
• SHRINK
• ≥55 %
• HARDNESS
• ≤240 HBW
• IMPACT
• ≥35 J

Title

AISI 9310 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 9310
• China
• GB/T 8162‑2018、GB/T 8163‑2018

Mechanics

• STATE
• RP
• YIELD
• EXTEND
• SHRINK
• HARDNESS
• IMPACT
• Annealed
• ≥830 MPa
• ≥540 MPa
• ≥18 %
• ≥55 %
• ≤240 HBW
• ≥35 J
• Annealed
• ≥790 MPa
• ≥510 MPa
• ≥18 %
• ≥55 %
• ≤240 HBW
• ≥35 J

• STATE
• Annealed
• RP
• ≥830 MPa
• YIELD
• ≥540 MPa
• EXTEND
• ≥18 %
• SHRINK
• ≥55 %
• HARDNESS
• ≤240 HBW
• IMPACT
• ≥35 J
• STATE
• Annealed
• RP
• ≥790 MPa
• YIELD
• ≥510 MPa
• EXTEND
• ≥18 %
• SHRINK
• ≥55 %
• HARDNESS
• ≤240 HBW
• IMPACT
• ≥35 J