What is ASTM E8 standard?
The ASTM E8 method covers the tension testing of metallic materials in any form at room temperature, specifically, the methods of determination of yield strength, yield point, tensile strength, elongation, and reduction of area. Touchstone Engineers have performed both standard and customized ASTM E8 testing.
What is ASTM standard for tensile test?
ASTM D3039 is the standard code of tensile test of composite materials in general. You can use ASTM D 638 for the determination of the tensile properties of unreinforced and reinforced plastics in the form of standard dumbbell-shaped test specimens.
Which standard is used for the tensile stress test and which are its parameters?
ASTM D638 and ISO 527-2 are two of the most common standards used to evaluate the tensile properties of reinforced and non-reinforced plastics. Though these standards measure many different tensile properties, the most common are tensile strength, tensile modulus, elongation, and Poisson’s ratio.
What is the size of tensile test specimen according to ASTM?
Specimens for ASTM D638 are dumbbell-shaped with either a 25 mm or 50 mm gauge length; a 50 mm gauge length is recommended.
How do I read my tensile test results?
It indicates the strength of the material just as it starts to permanently change shape. It is determined as the value of the stress at which a line of the same slope as the initial portion (elastic region) of the curve that is offset by a strain of 0.2% or a value of 0.002 strain intersects the curve.
Which ASTM standard is used while testing metal ductility?
ASTM E8/E8M Standard Test Methods for Tension Testing of Metallic Materials governs the determination of Ultimate Tensile Strength, Yield Strength plus Elongation and Reduction of Area which are measures of ductility.
What ASTM test for tension is designated for plastic?
ASTM D638
ASTM D638 specifies methods for testing the tensile strength of plastics and other resin materials and for calculating their mechanical properties, and outlines accuracy requirements for the test frames and accessories used. This test method uses dumbbell-shaped specimens with either a 25 mm or 50 mm gauge length.
What is the difference between ISO and ASTM on material testing?
ASTM is a national organization that is a part of ISO organizations. ISO is an international organization that has representations from all countries including ASTM. ISO establishes documents and updates the standards of testing materials with global consensus from the experts of the associated national organizations.
What is the purpose of tensile testing in UTM?
It is used to find out how strong a material is and also how much it can be stretched before it breaks. This test method is used to determine yield strength, ultimate tensile strength, ductility, strain hardening characteristics, Young’s modulus and Poisson’s ratio.
What care should be taken while performing a test on UTM?
The grips used in the testing machine must be properly serrated so that there is no chance of slippage of the specimen. If the specimen breaks due to any reason, other than the tensile stress, the test procedure should be discarded, and a new test must be performed on a fresh specimen.
What is E8 in ASTM E8?
This standard is issued under the fixed designation E8/E8M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
What is the gauge length?
The term ‘gauge length’ refers to the part of a test specimen actually being measured for elongation during a tensile test.