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52100 VAC-ARC is a deep hardening alloy steel used for aircraft bearings and other high stressed parts where good rolling contact fatigue strength is required at operating temperatures below 400°F (204°C). This grade is produced by the vacuum-arc remelting process and offers greatly improved cleanliness and internal soundness over conventionally air melted bearing quality SAE 52100 steel.
| Weight % | C | Mn | Si | Cr | Fe |
|---|---|---|---|---|---|
| minimum | 1.05 | 0.35 | 0.30 | 1.50 | Reminder |
| maximum |
| Characteristics | English | Metric | |
|---|---|---|---|
| Nominal density
(68°F/20°C) |
0.280 lbs/in3 | 7.75 g/cm3 | |
| Coefficient of thermal expansion | 100°F – 500°F
38°C – 260°C |
6.45 micro in/in- °F | 11.6 micro m/m- °K |
| 100°F – 800°F
38°C – 427°C |
7.35 micro in/in- °F | 13.2 micro m/m- °K | |
| 100°F – 1000°F
38°C – 538°C |
7.78 micro in/in- °F | 14.0 micro m/m- °K | |
| 100°F – 1200°F
38°C – 649°C |
7.96 micro in/in- °F | 14.3 micro m/m- °K |
| Modulus of | Hardness | ||||||
|---|---|---|---|---|---|---|---|
| Machinability | Rigidity | Elasticity | Rockwell C | ||||
| % | psi∙106 | GPa | psi∙106 | GPa | 1/2” | 1/8” | |
| Bar & Rod | 37-45 | 12 | 82.7 | 29 | 200 | 45 | 66.5 |
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