CWS 0.3, CWS 0.4, CWS 0.5, CWS 0.6, CWS 0.8, CWS 1.0, CWS 1.2
| TYPICAL FATIGUE STRENGTH INCREASES | ||
|---|---|---|
| BEFORE PEENING | AFTER PEENING | |
| Coil Springs | 75.0 KSI | 125.0 KSI |
| Titanium Joints | 38.0 KSI | 84.0 KSI |
| Carburized Gears | 31.0 KSI | 73.0 KSI |
| HYBO Weldments | 6.0 KSI | 46.0 KSI |
| 4340 Pins | 70.0 KSI | 87.0 KSI |
| TYPICAL FATIGUE LIFE INCREASES | |||
|---|---|---|---|
| CYCLES STREES LEVEL | CYCLES BEFORE PEENING | CYCELS AFTER PEENING | |
| Carburized Gears | 80.0 KSI | 2,00,000 | 3,00,00,000 |
| Leaf Springs | 140.0 KSI | 3,00,000 | No Failure |
| 4340 Polished | 90.0 KSI | 53,000 | 2,00,000 |
| 4340 Electroless | |||
| Nickel Plated | 90.0 KSI | 39,000 | 1,41,000 |
| SIZE OF CUT WIRE SHOTS AVAILABLE | ||||
|---|---|---|---|---|
| Eq. Grit | Size in Inches | Eq. Cast Shot Size | Cut Wire Shot Dia (mm) | Shot Peening Designation |
| G - 10 | 0.0787 | S-780 / SS -2000 | 2.00 mm | P - 78 |
| G - 13 | 0.0625 | S-660 / SS -1700 | 1.06 mm | P - 62 |
| G - 14 | 0.0539 | S -550 / SS -1400 | 1.40 mm | P - 55 |
| G - 16 | 0.0469 | S -460 / SS -1180 | 1.20 mm | P - 46 |
| G - 18 | 0.0409 | S -390 / SS -1000 | 1.00 mm | P - 39 |
| G - 20 | 0.0319 | S -330 / SS -850 | 0.80 mm | P - 33 |
| G - 25 | 0.028 | S -280 / SS -710 | 0.70 mm | P - 28 |
| G - 30 | 0.0228 | S -230/ SS -600 | 0.60 mm | P - 23 |
| G - 40 | 0.0169 | S -170/ SS-425 | 0.40 mm | P - 16 |
| G - 50 | 0.0118 | S -110/ SS-300 | 0.30 mm | P - 11 |
| G - 80 | 0.0079 | S -070/ SS-180 | 0.20 mm | P - 8 |
