Standard Practice for STEEL CASTINGS, TEXTURES AND DISCONTINUITIES, EVALUATING AND SPECIFYING, BY VISUAL EXAMINATION
|Publication Date:||30 July 1982|
This practice includes reference photographs and descrjptions that illustrate various types and degrees of surface roughness and surface discontinuities that may occur in steel castings. They are intended to provide the following:
A guide enabling recognition of discontinuities and their differentiation upon visual examination as to type and severity.
Sets of graded reference photographs and descriptions from which purchasers and suppliers may, by mutual agreement, select visual examination standards of surface acceptability.
The surface roughness and discontinuities listed below are included in this practice. Verbal descriptions of discontinuities are presented in the adjunct2 , with illustrations where a photo series is not applicable for rating their severity (Section 3).
Linear Discontinuities - Hot tears and cracks.
Shrinkage in reentrant angles (comers) and edges.
Shrinkage under risers and gates, and
Shrinkage revealed by machining.
Slag inclusions, and
Aligned porosity, and
Rat tails, and
Laps, folds, and cold shuts, and
Metal Removal Marks:
Air carbon-arc cutting.
Abrasive cut-off, and
Sawing, grinding, chiselling.
Inserts - Chaplets and internal chills.
This standard may involve hazardous materials, operations. and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2Detailed drawings are available at a nominal cost from ASTM. 1916 Race St.,. Philadelphia, Pa. 19103. Request Adjunct No. 12-108020-02.