BS ISO 18338:2015 pdf free.Metallic materials一Torsion test at ambient temperature.
BS ISO 18338 specifies the method for torsion test at room temperature of metallic materials. The tests are conducted at room temperature to determine torsional properties.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical testing
ISO 9513, Metallic materials — Calibration of extensometers used in uniaxial testing
ASTM E2624, Standard Practice for Torque Calibration of Testing Machines and Devices
DIN 51309, MaterIals testing machines — Calibration of static torque measuring devices
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
4 Symbols and designations
Symbols and corresponding designations are given in Table 1 and Figure 1 or elsewhere in this International Standard where they appear.
5 Principle of test
The test piece is subjected to continuously increasing angle of twist, generally to fracture, for the determination of one or more of the mechanical properties such as elastic slope, torsional proof strength, torsional yield strength, torsional strength and maximum plastic shear strain.
6 Test piece
6.1 Shape and dimensions of test pieces
6.1.1 Cylinder test pieces
The shape and dimensions for cylinder test pieces are shown in Figure 2. The shape and size for two ends of the test piece should be in coincidence with the testing machine gripping part. It is recommended that the test pieces be 10 mm diameter, 50 mm or 100 mm gauge length, and 70 mm or 120 mm parallel length. If other test pieces are used, the parallel length should be the sum of gauge length and two times diameter.
6.1.2 Tube test pieces The shape and dimensions for tube test pieces are shown in Figure 3. The parallel length for tube test pieces should be the sum of gauge length and two times external diameter. Tube test pieces should be straight and round, plugged at both ends. The plugged two ends should not be in the parallel length part of tube test pieces. The shape and size for plugs are shown in Figure 4.BS ISO 18338 pdf free download.
Tags: Metallic materials
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