Alloy Steel 9310

Chemical Analysis
C% Carbon
0.08 – 0.13
Mn% Manganese
0.45 – 0.65 max
P% Phosphorus
0.025 max
S% Sulfur
0.025 max
Si% Silicon
0.20 – 0.35
Ni% Nickel
3.0 – 3.5

General characteristics of Alloy Steel 9310

This is a nickel-chrome-molybdenum case-hardening steel, with good strength and toughness properties. It shows high hardenability, high core hardness and high fatigue strength.


Components with large cross section requiring high toughness and core strength such as gears, crankshafts and heavy-duty gear shafts in aircraft and truck construction.


This alloy would be forged between 2250 and 1700ºF (1230 and 925ºC.)

Heat treatment

Annealing: Not normally annealed: if so sub-critical anneal to give spheroidized structure.

Normalizing: 1650-1700ºF (900-930ºC.)

Carburizing: 1650-1740ºF (900-950ºC) and oil quench.

Hardening: Core: 1530-1620ºF (830-880ºC) and oil quench. Case: 1440-1470ºF (780-800ºC ) and oil quench

Tempering: 340-410ºF (170-210ºC.)

Machinability: This alloy would best be machined in the normalized condition, prior to case hardening.

Weldability: The alloy is easily welded, but should be welded prior to case hardening.


To Send a Request for Quote, please Click Here, call 973.276.5000, or fax (973) 276 – 5050