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9310 VAC-ARC is a premium quality alloy carburizing steel produced by the vacuum consumable electrode process. It has a high hardenability, high core hardness and high fatigue strength, all of which make it ideally suited for critical aircraft engine gears.
| Weight % | C | Mn | P | S | Si | Ni | Cr | Mo | Fe |
|---|---|---|---|---|---|---|---|---|---|
| minimum
|
0.08 | 0.45 | — | — | 0.15 | 3.00 | 1.00 | 0.08 | reminder |
| maximum | 0.13 | 0.65 | 0.025 | 0.025 | 0.32 | 3.50 | 1.40 | 0.15 |
| Tensile | Hardness | ||||||
|---|---|---|---|---|---|---|---|
| Heat Treatments | Ultimate | Yield | Elongation,
% in 2” |
Reduction
of area |
Brinell, Core | ||
| KSI | MPa | KSI | MPa | % | % | ||
| Pseudo carburized at 1700°F (926°C) for 8 hrs. Oil quenched. Temperd at 300°F (148°C) for 2 hours. | 187 | 1290 | 162 | 1120 | 15 | 51 | 375 |
| Pseudo carburized at 1700°F (926°C) for 8 hrs. Slow cooled to room temperature. Heated to 1425°F (773°C), oil quenched. Tempered at 300°F (148°C) | 155 | 1070 | 130 | 896 | 15.5 | 52 | 331 |
| Pseudo carburized at 1700°F (926°C) for 8 hrs. Slow cooled to room temperature. Heated to 1525°F (829°C), oil quenched. Tempered at 300°F (148°C) | 175 | 1210 | 155 | 1070 | 16 | 53 | 363 |
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