Per ASTM E8/E8M, the smallest sub-size flat specimens use the dimensions listed by Amir Atrian, above. The smallest sub-size round specimens are 2.5 mm diameter, with a 10 mm (L/D=4) or 12.5 mm (L. However, for testing specimens in the form of thin sheeting, including film less than 1.0 mm (0.04 in.) in thickness, ASTM standard D882 is the preferred test method. Materials with a thickness greater than 14 mm (0.55 in.) shall be reduced by machining. The tensile test on metals or metallic materials, is mainly based on DIN EN ISO 6892-1 and ASTM E8.Both standards specify specimen shapes and their testing. The objective of the standards is to define and establish the test method in such a way, that even when different testing systems are used, the characteristic values to be determined remain reproducible and correct.
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As a manufacturer of both dies and presses, Pioneer-Dietecs has everything you need for your die-cutting process. With over 50 years of experience machining dies, specimen dies are our specialty, with close tolerances that far exceed standards for enhanced sharpness and long die life. Pioneer manufactures dies to meet every specification—ASTM, JIS, ISO and DIN. The Pioneer-Dietecs Specimen Die Store at ASTMDie.com offers specimen die products and services. To learn about Pioneer-Dietecs other products, visit Pioneer-Dietecs.com.
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We will recalibrate, sharpen and polish your die to like new condition, enhancing the quality of the die, often making it better than when you purchased it. All dies are certified with a maintenance log for perpetual archiving so you can track them for future ISO referencing.
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ASTM E8 is one of two major metals tension testing methods used worldwide to determine yield strength, yield point elongation, tensile strength, elongation, and reduction of area of metal products. It applies to metallic materials in any form, including sheet, plate, wire, rod, bar, pipe, and tube. For each of these specimen types, the standard defines suitable geometries and dimensions, requiring specific gripping solutions that are critical to performing a successful test.
The most common types of E8 specimens are rectangular and round. For testing rectangular type specimens, the standard gripping solution is a set of mechanical wedge action grips, (manual, pneumatic, or hydraulic) with flat serrated faces. In the case of round specimens, vee serrated or threaded faces can be used, depending on the geometry of the specimen ends. To test fine wires, can be used. These grips distribute the load along an extended section of the wire to avoid specimen failure within the grips or at grip faces (“jaw breaks”). Specimen preparation is a critical part of metals testing, as improper preparation of specimens can yield unsatisfactory test results.
Bluehill® Universal Software provides standard functions to perform metals tensile tests easily and accurately, and also includes pre-made methods for the major metals standards, including ASTM E8. For more complex test requirements that require changing the rate at different points or for specific stressing or straining rates, the Bluehill Metals test type allows users to calculate results such as yield point elongation and upper and lower yield as directed by ASTM E8.
A range of are offered for tensile testing of metals. When performing strain measurements such as the strain corresponding to the yield strength, Instron’s 2630 series of axial clip-on extensometers are the traditional solution. The non-contacting Advanced Video Extensometer 2 (AVE 2), allow users to determine the elongation at fracture without exposing the equipment to damage due to the energy released. This non-contacting solution is especially useful for thin foils, on which traditional contacting extensometers cannot be used. Instron’s AutoX750 automatic contacting extensometer is an advanced contacting extensometer that moves automatically and greatly improves test throughput.
Gangsters organized crime download. The challenges of testing to this standard are:
- Strain control
- Gripping for varied specimen types
Instron's Solution:
- Bluehill Universal contains an automatic loop control strain algorithm that allows for strain control without any setup or gain tuning required. This allows users to obtain excellent strain control on Instron systems with a number of different extensometers quickly and easily
- Instron has many gripping solutions for all types of metal specimens, from bar to dog bone to wire and foil specimens.
Intel atom n450 1.66ghz. It is important to review ASTM E8 / E8M – 16a in order to fully understand the test setup, procedure, and results requirements.
For more information on ASTM E8 view our Definitive Guide to ASTM E8/E8M Tension Testing of Metals