The aim of this research is the reactivation secondhand ((scrap)) steel compression springs, which used in one private plastic factory, by applying heat - treatment with three methods. 1- Quenching only. 2- and tempering. 3- Annealing , quenching tempering.Were doing under supply conditions. microstructures inspected for specimen from any model 500 X. hardness tests springs have done before aft...

Natural occurrences of asbestos and potential exposures to such materials have drawn significant public and regulatory interest in recent years. Proposed revisions to a published analytical method (ASTM D7200) that is designed to monitor airborne fiber concentrations are based on data developed using inappropriate sample preparation strategies, including over-grinding the samples and the use of...

The reliability of making risk-based corrective action (RBCA) decisions using ASTM methods was evaluated. Indoor air quality (IAQ) testing results for 153 residential homes in 1998 at a site in Denver, Colo., were evaluated in this study. Decisions regarding groundwater remediation and indoor air mitigation in residences located over a shallow groundwater plume contaminated with chlorinated com...

The American Society for Testing and Materials (ASTM) recently updated its standards E 1387 and E 1618 for the analysis of fire debris. The changes in the classification of ignitable liquids are presented in this review. Furthermore, a new standard on extraction of fire debris with solid phase microextraction (SPME) was released. Advantages and drawbacks of this technique are presented and disc...

Ah&met-The boundary element method is used to analyze the ACPD (alternating current potential drop) field perturbed by a semi-elliptical surface flaw in a metallic sheet. The depth of the penetration of the alternating current is assumed to be small as compared to the crack depth. This allows us to adopt the “unfolding” technique developed by Dover et al. [ASTM STP 722, 401-427 (1981)], which r...