Forging Alloy Steel AISI 9315 & 9317

AISI 9315 AISI 9317
C Carbon
0.13 – 0.18
C Carbon
0.15 – 0.20
Mn Manganese
0.45 – 0.60
Mn Manganese
0.45 – 0.60
P Phosphorus
0.040 max
P Phosphorus
0.040 max
S Sulfur
0.040 max
S Sulfur
0.040 max
Si Silicon
0.20 – 0.35
Si Silicon
0.20 – 0.35
Ni Nickel
3.0 – 3.5
Ni Nickel
3.0 – 3.5
Cr Chromium
1.0 – 1.4
Cr Chromium
1.0 – 1.4
Mo Molybdenum
0.8 – 0.15
Mo Molybdenum
0.8 – 0.15

General Characteristics of AISI 9315 & 9317

AISI 9315 & 9317 have slightly higher carbon content, hence slightly higher core strengths than 9310 grade. They would be used in similar applications and would undergo similar hot working processes and heat treatments.

Applications that use AISI 9315 & 9317 Forgings

AISI 9315 & 9317 would be used for components with large cross section requiring high toughness and core strength such as forged gears, crankshafts and heavy-duty gear shafts in aircraft and truck construction.

Forging Temperatures of AISI 9315 & 9317

AISI 9315 & 9317 would be forged between 2200 and 1700ºF (1205 and 925ºC)

Heat Treatment

Annealing: AISI 9315 & 9317 would rarely be annealed. Optimum machinability is obtained from an as-forged or normalized structure.

Normalizing: AISI 9315 & 9317 would be normalized in the region of 1650ºF (900ºC) and air cooled.

Carburizing: The steels would be carburized at 1650-1740ºF (900-950ºC) followed by water quench for large components of simple shape only, otherwise oil quench.

Hardening: AISI 9315 & 9317 would be austenitized, following carburizing, at a temperature of 1450 – 1525ºF (790-830ºC.)

Tempering: A temperature based on past experience would be used to give the required mechanical properties.

Machinability: AISI 9315 & 9317 would best be machined in the as-forged or normalized condition, prior to case hardening.

Weldability: AISI 9315 & 9317 are easily welded, but should be welded prior to case hardening.

To Send a Request for Quote, please Click Here, or call 1.973.276.5000 or fax 1.973.276.5050.