1. Rationale
The revision to Paragraph 12.2.2, which would require inclusion ratings to be recorded in half-severity level increments instead of whole numbers, is needed for the following reasons: 1) To eliminate the disagreement within the standard as other paragraphs (listed below) currently require ratings in half-severity level increments. 2) Produce agreement with the inclusion limit increments of material specifications that reference E45 (ASTM A534 and A866 have limits in half-severity level increments). The revisions to Paragraphs 11.5, 11.6, 12.6.1, 15.1, and 15.2.2 standardize the term half-severity level increment. These sections currently use a variety of terminology that indicate half-severity level increments. The revision to Table 3 gives examples of ratings in half-severity level increments. Editorial changes to Paragraphs 12.5.7 and 4.2 are required because they currently reference incorrect paragraph numbers.
Keywords
alumina; automatic image analysis; complex inclusions; fracture test; globular inclusions; inclusions; inclusion rating; inclusion stringers; JK inclusion rating; light microscopy; macroetch test; magnetic-particle method; oxide; SAM rating; silicate; steel; step-down method; stringer; sulfide; Alumina; Area fractions; Ferrous metals/alloys; Field area; Fracture testing--metals/alloys; Geometric analysis; Gray level intensity; Image analysis--metals/metallic materials; Inclusions--metals/alloys; JK inclusion ratings; Length of inclusions; Macroetching; Macroscopic analysis; Magnetic particle inspection; Metallographic analysis/inspection; Metals and metallic materials--inclusion rating; Microscopic examination--metals/alloys; Morphology; Nonmetallic inclusions; Oxide inclusions; Photomicrography; SAM; SAM rating; Slab/slabs; Specimen preparation (for testing)--metals/alloys; Steel bars; Steel billets and blooms; Step-down method; Stereological measurement; Stringer; Structural metals/alloys; Sulfide/sulfur environments; Sulfur--steel; Surface analysis--metals/alloys; Visual examination--metals/alloys; Volume fractions
Citing ASTM Standards
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