Download as PDF, TXT or read online from Scribd. The most significant difference between E8 and E8M test B557 Test Methods. E8 / E8M-16a Standard Test Methods for Tension Testing of Metallic Materials. Products and Services / Standards & Publications / Standards Products. Standard + Redline PDF Bundle: 60: $83.00: ADD TO CART. ASTM E8 / E8M-16a, Standard Test Methods for Tension Testing of Metallic Materials.

NOTE—These test methods are the metric companion of Test Methods E 8. Committee E-28 was granted an exception in 199!' The Committee on #tandards to maintain E8 and E8M as separate companion standards rather than com!ining standards as recommended!'

Translate bahasa batak. The $orm and #t'%e man&a%. NOTE—These metric test methods are essentia%%' the same as those in Test Methods E 8' and are compati!%e in technica% content except that gage%engths are re(&ired to!e )* for most ro&nd specimens rather than +* as specified in Test Methods E 8. Test specimens made from powder meta%%&rg',M/ materia% s are exempt from this re(&irem ent!' Ind&str'wide agreement to 0eep the pressing of the materia% to a specific proected area and densit'. NOTE—Exceptions to the proisions of these test methods ma' need to!e made in indiid&a% specifications or test methods for a partic&%ar materia%.

$or examp%es' see Test Methods and *efinitions 3 45 and Test Methods 6 ))M. NOTE—7oom temperat&re sha%%!e considered to!e 15 to 48C &n%ess otherwise specified. This standard does not p&rport to address a%% of the safet' concerns' if an' associated with its &se. t is the responsi!i%it' of the &ser of this standard to esta!%ish appropriate safet' and hea%th practices and determine the app%ic a!i%it' of reg&%ator'%imitations prior to &se. 9in a uniaial test, the strain s first point of;ero slope from the point of transition from discontinuous yielding to uniform strain hardening.

8f the transition occurs over a range of strain, the?)- end point is the intersection et'een. Tension tests provide information on the strength and ductility of materials under uniaial tensile stresses. This information may e useful in comparisons of materials, alloy development, uality control, and design under certain circumstances. The results of tension tests of specimens machined to standardi;ed 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 ehavior in different environments.

ASTM E8 Metal Tensile Testing ASTM E8 describes tensile testing of metals such as steel or metal alloys. This test determines important mechanical properties such as yield strength, ultimate tensile strength, elongation, and reduction of area.

E8 tensile tests determine the ductility and strength of various metals when the materials undergo uniaxial tensile stresses. Such information is important for alloy development, design, quality control, and comparison of different sets of metals. An electro-mechanical or hydraulic universal testing machine equipped with the appropriate specimen grips, an extensometer and software capable of strain rate control and recording stress – strain data is necessary to conduct this test. If you need to conduct tensile tests according to ASTM E8, please read the entire specification from the relevant ASTM publication. ASTM E8 Metal Tensile Testing • Measure and record the specimen dimensions necessary to determine the cross sectional area at its smallest point. The original cross sectional area is used for all engineering stress calculations.

• Use ink and a scribe or punch to place gage marks on the test specimen at the appropriate gage length. The distance between the gage marks after the specimen is broken is used to determine the percent elongation at break.

Note: To accurately compare elongation values between tests, the gage lengths must be the same. • Zero the testing machine without the specimen inserted in the grips. Then install the specimen in the grips and start loading the sample. The speed of testing is generally specified in one of three manners: a) the rate of straining of the specimen; b) the rate of stressing of the specimen; or c) the rate of separation of the crossheads.

In addition, the test rate is to remain constant through yield but can then be increased when determining ultimate tensile strength and elongation at break. See the ASTM E8 specification for more details. • Run the test until specimen failure or fracture. Remove the broken sample from the machine and fit the fractured ends together. Measure the distance between the gage marks to the nearest 0.05 millimeters.