- 35.1 Introduction to Surface Engineering
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Importance of Surface Condition
- Corrosion resistance
- Fatigue strength
ASME Y 14.36M – 1996
- Roughness Rt and Ra – Finely spaced irregularities
- Waviness – Greater spacing than roughness.
- Lay – Direction of surface patterns
- Cutoff – Sampling length used in the calculation of roughness. If not specified, a value of .030 in. is assumed.
Typical Values of Roughness