ASTM B428-09(2018)
(Test Method)Standard Test Method for Angle of Twist in Rectangular and Square Copper and Copper Alloy Tube
Standard Test Method for Angle of Twist in Rectangular and Square Copper and Copper Alloy Tube
SIGNIFICANCE AND USE
4.1 The rectangular or square copper alloy tube covered by this test method may be used in applications in which control of twist is important to proper fit in final assembly and to minimize rework to bring the tube into compliance. It is recognized that the amount of twist, in degrees per increment of length, can change as a result of the weight of the product and its length during measurement.
4.2 This test method provides a procedure for measuring the twist in square and rectangular copper and copper alloy tubes as a measure of the deviation from straightness.
4.3 This test method allows the purchaser and supplier or manufacturer to inspect square and rectangular copper and copper alloy tube with a standard technique that provides acceptable twist in delivered tubes.
SCOPE
1.1 This test method establishes the requirements for the determination of the angle of twist in rectangular and square copper and copper alloy tube.
1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: B428 − 09 (Reapproved 2018)
Standard Test Method for
Angle of Twist in Rectangular and Square Copper and
Copper Alloy Tube
This standard is issued under the fixed designation B428; 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. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope minimize rework to bring the tube into compliance. It is
recognized that the amount of twist, in degrees per increment
1.1 This test method establishes the requirements for the
of length, can change as a result of the weight of the product
determination of the angle of twist in rectangular and square
and its length during measurement.
copper and copper alloy tube.
4.2 This test method provides a procedure for measuring the
1.2 The values stated in inch-pound units are to be regarded
twist in square and rectangular copper and copper alloy tubes
as standard. No other units of measurement are included in this
as a measure of the deviation from straightness.
standard.
1.3 This standard does not purport to address all of the
4.3 This test method allows the purchaser and supplier or
safety concerns, if any, associated with its use. It is the
manufacturer to inspect square and rectangular copper and
responsibility of the user of this standard to establish appro-
copper alloy tube with a standard technique that provides
priate safety, health, and environmental practices and deter-
acceptable twist in delivered tubes.
mine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accor-
5. Apparatus
dance with internationally recognized principles on standard-
5.1 Horizontal Reference Plane (see Fig. 1 (a) and (b)) of
ization established in the Decision on Principles for the
sufficient length to support the tube specimen and a clamping
Development of International Standards, Guides and Recom-
device to hold one end of the specimen against the reference
mendations issued by the World Trade Organization Technical
plane.
Barriers to Trade (TBT) Committee.
5.2 Transparent Plastic Protractor Segment engraved with
2. Referenced Documents
angle lines as shown in Fig. 1 (c).
2.1 ASTM Standards:
5.3 Parallel Face Blocks.
B846 Terminology for Copper and Copper Alloys
3. Terminology
6. Test Specimen
3.1 For definitions of terms related to copper and copper
6.1 The test specimen shall be cut to a minimum length of
alloys, refer to Terminology B846.
10 in. and a maximum length of 15 in.
4. Significance and Use
7. Procedure
4.1 The rectangular or square copper alloy tube covered by
this test method may be used in applications in which control 7.1 Place the tube specimen lengthwise on the reference
of twist is important to proper fit in final assembly and to
plane. Whenever the specimen has noticeable edgewise
curvature, place the specimen so that a side having convex
curvature is in contact with the reference plane. Further
This test method is under the jurisdiction ofASTM Committee B05 on Copper
placement requirements are as follows:
and Copper Alloys and is the direct responsibility of Subcommittee B05.06 on
Methods of Test.
7.1.1 For rectangular tube, place a major outer dimension
Current edit
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.