SAE J444_201006

This SAE Recommended Practice pertains to blast cleaning and shot peening and provides for standard cast shot and grit size numbers. For shot, this number corresponds with the opening of the nominal test sieve, in ten thousandths of inches1, preceded by an S. For grit, this number corresponds with the sieve designation of the nominal test sieve with the prefix G added. These sieves are in accordance with ASTM E 11. The accompanying shot and grit classifications and size designations were formulated by representatives of shot and grit suppliers, equipment manufacturers, and automotive users. Due to NADCAP audit findings on the all pass sieves in Figure 1 and 2 the group is requesting the Figure 1 and 2 all pass changed to 0% and the following be added to the reference section. ASTM E 29 Using Significant Digits in Test Data to Determine Conformance with Specification. Along with the following statement as recommend in E-29. The following applies to all specified limits in this standard: For purposes of determining conformance with these specifications, an observed value or a calculated value shall be rounded “to the nearest unit” in the last right-hand digit used in expressing the specification limit, in accordance with the rounding method of ASTM Practice E 29. This document has been reaffirmed to comply with the SAE 5-Year Review policy.