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ASTM grain size is a property written into many specifications for metals, with finer grain sizes generally indicating better mechanical properties, such as formability. While measuring certain materials for such properties can be difficult, electron backscatter diffraction can provide precise determinations as well as give information on grain size distribution and statistics. A new ASTM…
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A recent revision to ASTM International standard E384 , Test Method for Knoop and Vickers Hardness of Materials, expands the range of its coverage. The standard is under the jurisdiction of Subcommittee E04.05 on Microindentation Hardness Testing, part of ASTM International Committee E04 on Metallography. The revision incorporates ASTM E92 , Test Method for Vickers Hardness of Metallic Materials…
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No industry standard currently exists that addresses the vacuum sealing requirements of knife-edged flanges for high vacuum applications. Existing international standards focus on interchangeability of the hardware, but do not address the reliability of the seal. ASTM International Committee E42 on Surface Analysis is now working on a proposed standard on the subject, WK21206 , Specification…
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A 2002 workshop on galling wear held by ASTM International Committee G02 on Wear and Erosion provided the impetus for the development of a new standard, ASTM G196 , Test Method for Galling Resistance of Material Couples. The new standard is under the jurisdiction of Subcommittee G02.40 on Non-Abrasive Wear. According to Scott Hummel, Ph.D., associate professor, head of the department of…
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Plastic pipe and components are used with low pressure oxygen and enriched air for a variety of applications, including medical and healthcare, agriculture (fish farming), welding and fabrication, waste water treatment and others. Despite this widespread use, there are currently no standards that help in the materials selection and design features of these systems. ASTM International Committee…
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ASTM International Committee F16 on Fasteners has recently approved an important new standard that deals with coated threaded fasteners and washers by hot-dip zinc galvanizing. The standard, F 2329, Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts and Special Threaded Fasteners, is under the jurisdiction of Subcommittee…
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ASTM International Committee G04 on Compatibility and Sensitivity of Materials in Oxygen Enriched Atmospheres originally developed the standard, G 88, Guide for Designing Systems for Oxygen Service, in 1984. Since that time, G 88 has been regarded as one of the leading design guides for oxygen systems throughout all industries that use oxygen. While the original version of the standard contained…
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ASTM International Committee F16 on Fasteners has developed a new standard, F 2329, Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners. The standard, which is under the jurisdiction of Subcommittee F16.03 on Coatings on Fasteners, covers the requirements for hot-dip zinc coating applied to…
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ASTM International Committee E42 on Surface Analysis has approved a new standard, E 2382, Guide to Scanner and Tip Related Artifacts in Scanning Tunneling Microscopy and Atomic Force Microscopy. The guide, under the jurisdiction of Subcommittee E42.14 on STM/AFM, was proposed in order to assist new scanning probe microscopy users with more rapid recognition and assessment of artifacts in imaging…