ASTM B428-93(1998)e1
(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
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 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
e1
Designation: B 428 – 93 (Reapproved 1998)
Standard Test Method for
Angle of Twist in Rectangular and Square Copper and
Copper Alloy Tube
This standard is issued under the fixed designation B 428; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
e NOTE—Fig. 1 has been editorially changed.
1. Scope 4. Procedure
1.1 This test method establishes the requirements for the 4.1 Place the tube specimen lengthwise on the reference
determination of the angle of twist in rectangular and square plane. Whenever the specimen has noticeable edgewise curva-
copper and copper alloy tube. ture, place the specimen so that a side having convex curvature
1.2 This standard does not purport to address all of the is in contact with the reference plane. Further placement
safety concerns, if any, associated with its use. It is the requirements are as follows:
responsibility of the user of this standard to establish appro- 4.1.1 For rectangular tube, place a major outer dimension
priate safety and health practices and determine the applica- side (width side) against the reference plane, as shown in Fig.
bility of regulatory limitations prior to use. 1.
4.1.2 For square tube, having curvature along all edges,
2. Significance and Use
place the specimen so that the side with the least convex
2.1 The rectangular or square copper alloy tube covered by
curvature is against the reference plane.
this test method may be used in applications in which control 4.2 Clamp one end of the specimen so that the tube surface,
of twist is important to proper fit in final assembly and to
adjacent to that end and facing the reference plane, will be in
minimize rework to bring the tube into compliance. It is firm contact with this plane. Keep the other end of the
recognized that the amount of twist, in degrees, per increment
specimen free.
of length can change as a result of the weight of the product 4.3 Position the protractor segment flush against the free
and its length during measurement.
end of the specimen, as shown in Fig. 2, and measure the total
2.2 This test method provides a procedure for measuring the angle of twist by reading the degrees for that angle line which
twist in square and rectangular copper and copper alloy tubes
most nearly coincide with the lower outside edge of the tube
as a measure of the deviation from straightness. end. In making this reading, keep the lower edge of the
2.3 This test method allows the purchaser and supplier or
protractor segment in contact with the reference plane or ho
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.