Sn

Sn
A relatively common element. Tin is a silvery white metal which is soft and pliable, and which emits the characteristic sound of "tin cry" when bent.
SN Curve
High-cycle fatigue situations, materials performance is commonly characterized by an S-N curve, also known as a Wöhler curve . This is a graph of the magnitude of a cyclic stress (S) against the logarithmic scale of cycles to failure (N).
S-N Diagram
Plot of stress (S) against the number of cycles (N) required to cause failure of similar specimens in a fatigue test.
Snatch
To take up the drive suddenly when the clutch pedal is released.
SnCl2
Chemical formula for Tin II Chloride.
Snells Law
Snells law defines the angle of refraction of a light beam when it passes from one medium to another.
SnF2
Chemical formula for Tin II Fluoride.
SnF4
Chemical formula for Tin IV Fluoride.
SnH4
Chemical formula for Tin IV Hydride.
Snipe Nose Pliers
Pliers with half round and tapered jaws. Also known as Long Nose Pliers.
SnO
Chemical formula for Tin II Oxide.
SnO2
Chemical formula for Tin IV Oxide.
SNR
Abbreviation of Signal to Noise Ratio. The ratio between a recorded signal and spurious background noise.
Snug Torque
The torque required to pull plates together so that direct contact occurs. Often used in angle control tightening.
Snugging
The process of pulling parts of a joint together, most of the input turn during this process is absorbed in the joint with little tension being given to the bolt.