For ADI-800, no scatter band was determined, due to only 8 specimens being available to determine the S-N curve.
S] = 50 % and that the scatter band for these specimens is [T.
This scatter band seems to be quite small compared to scatter bands determined in  for S-N curves, based on shrinkages classifications.
These models assume that the scatter band of the fracture toughness values can be modeled using Weibull statistics.
It has been shown theoretically (21) that so long as no stable crack extension occurs during the loading, and the constraint in the specimen does not change, which means that the triaxiality of the stress and strain field at the crack tip does not change during the loading event, the scatter band follows the Weibull distribution.
Scatter bands of each specimen thickness overlapped and to test specimens large enough for fracture to occur under dominant linear-elastic conditions is not practically possible.
An acceptable torque tension curve is generally shallow with a narrow scatter band
, whereas an unacceptable torque tension curve is steep with a large scatter.
Other, more practical books show the scatter band that exists in reality because of chemical, processing and procedural variations and measurement errors.
Figure 8 shows a typical scatter band between the tensile properties of test bars cut from standard ASTM keel blocks and the hardness of the same broken test bar shoulder.
s]=50% of the Wohler curves before the knee point follow a linear relation, and can be fully described by two parameters, while the scatter band is considered constant and consequently characterized by one single parameter.
This is in good agreement with evaluated Wohler curves of Figure 5, where a long, thin shape of the MnS in forged state causes a lower fatigue strength and smaller scatter band in the HCF regime, at least for cycles to failure below [10.
The virgin, bottle flake, and recycled powder define a relatively narrow scatter band
, with no significant differences between the materials.