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ASTM E8/E8M Standard Test Methods for Tension Testing of Metallic Materials
ASTM E8 is a test method that determines yield strength, yield point elongation, tensile strength, elongation, and reduction of the area by tension testing of metallic materials at room temperature. Tensile testing by ASTM E8 test method determines the ductility and strength of different metals undergoing uniaxial tensile stresses. This information is important for alloy development, product design, quality control, and metal comparison. Read more about ASTM E8/E8 Standard Test Methods for Tension Testing of Metallic Materials
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Introduction to ASTM E8/E8M-22
ASTM E8/E8M is a test method designed to measure the tension testing of metallic materials. The strength and ductility of materials under uniaxial tensile stress are determined by this test method. Moreover, the tension testing of metallic materials helps determine yield strength, yield point elongation, tensile strength, elongation, and reduction of area. The results obtained are specially used for quality control and specification purposes. Tensile testing by the ASTM E8 test method determines the ductility and strength of different metals undergoing uniaxial tensile stresses. This information is important for alloy development, product design, quality control, and metal comparison. ASTM E8 refers to inch and pound units of measurement, ASTM E8M uses SI units. The initial gauge length for determining strain in the ASTM E8 test method refers to 4D (or four times) the diameter of the round specimens, whereas in the ASTM E8M test method, it refers to 5D, (or five times) the diameter of the round specimens. In case of failure to observe this difference or a mix-up, characteristic values no longer remain comparable. MaTestLab has the best network of testing labs in the USA to carry out ASTM E8 tests for our clients.
ASTM E8 test method is useful in comparing materials, alloy development, designing, and testing acceptance of materials for trade purposes. The results of tension tests of specimens machined to standardized dimensions from selected portions of a part or material may not totally represent the strength and ductility properties of the entire end product or its in-service behavior in different environments.
ASTM E8 specimens and dimensions
ASTM E8 Test Method
This test method proceeds with setting up the test machine and warming it up to a normal operating temperature. The cross-sectional dimensions of the test specimens are measured and recorded. ASTM E8 test parameters, based on sample thickness, are support span, loading speed, and yield properties.
ASTM E8 Testing Machine
Control Method
For control method A, the testing machine is operated at a specific rate of stress application in the linear elastic region. For control method B, the testing machine is operated in closed-loop control using the extensometer signal. For control method C, the testing machine is set to a crosshead speed equal to 0.015 ±0.003 mm/mm/min.
Extension Under Load Method
It determines the yield strength in two ways, such as by analyzing a stress-strain diagram or using devices to indicate when the specified extension occurs. Extensometers, dividers, and other devices are used for this purpose.
ASTM E8 Specimens
Specimen details
ASTM E8 Specimens can be round, sheet-type, or plate-type.
Specimen dimensions
The gauge length required for ASTM E8 is 4D. The thickness should be 40 mm.
Specimen preparation
Specimens are injection molded or cut from molded or extruded sheets or plates.
ASTM E8 Results
This test method evaluates yield point elongation, uniform elongation, tensile strength, and yield strength. Yield properties vary with specimen depth, temperature, atmospheric conditions, and strain rate as we conduct the tension testing of metallic materials.
Tests related to ASTM E8
ASTM E8M-22 is similar to ASTM E8. As per the ASTM E8 test method, the gauge length required is 4D, whereas it is 5D for ASTM E8M-22. Both procedures cover the tension testing of metallic materials and help determine tensile properties in SI units at room temperature between 10 °C and 38°C. Furthermore, ISO-204 is related to ASTM E8 as it covers the uniaxial creep tension testing of metallic materials. It covers uninterrupted creep tests with continuous extension monitoring and periodic elongation measurement. It also includes stress rupture tests where the time to fracture is normally measured.
ASTM E8 test speeds and control methods
(a) Rate of straining of the specimen,
(b) Rate of stressing of the specimen,
(c) Crosshead speed
(d) The elapsed time for completing part or all of the test, or
(e) Free-running crosshead speed (rate of movement of the crosshead of the testing machine when not under load).
You can share your astm e8 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm e8 test to various testing techniques.
How much do I need to pay for the astm e8 test?
Please contact us for a detailed quote for your astm e8 testing needs. Cost incurred to carry out different astm e8 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.
How many samples are required for astm e8?
The required number of samples or specimens should comply with the procedure given in the astm e8 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
How much discount can I get on the astm e8 test?
MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.
How many days will it take to complete the astm e8 test?
The turnaround time for astm e8 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
Where can I get the astm e8 tested?
You can share your astm e8 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm e8 test to various testing techniques.
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