Material ratio Rmr (in ASME tp) is the ratio (expressed as a percentage) of the material-filled length to the evaluation length le in the level of intersection defined by cref and dc.
Reference line cp is defined by the percentage value cref (e.g. 5%). A level of intersection is then defined with regard to the reference line and moved into the material by the value of dc. The material ratio is calculated for the level of intersection.
Material ratio curve (Abbott curve) specifies the material ratio Rmr dependent on the level of intersection cp+dc.
The material ratio can also be evaluated on the P- or W-profile (Pmr or Wmr).