ASTM E604-83(1994)

Standard Test Method for Dynamic Tear Testing of Metallic Materials

SCOPE
1.1 This test method covers the dynamic tear (DT) test using specimens that are 3/16 in. to 5/8 in. (5 mm to 16 mm) inclusive in thickness.  
1.2 This test method is applicable to materials with a minimum thickness of 3/16 in. (5 mm).  
1.3 The pressed-knife procedure described for sharpening the notch tip generally limits this test method to materials with a hardness level less than 36 HRC.  Note 1-The designation 36 HRC is a Rockwell hardness number of 36 on Rockwell C scale as defined in Test Methods E18.

General Information

• Status: Historical
• Publication Date: 31-Dec-1993
• Technical Committee: E28 - Mechanical Testing
• Drafting Committee: E28.07 - Impact Testing

Relations

• Replaced By: ASTM E604-83(2002) - Standard Test Method for Dynamic Tear Testing of Metallic Materials
• Effective Date: 25-Mar-1983

Standards Content (Sample)

Designation: E 604 – 83 (Reapproved 1994) An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
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Dynamic Tear Testing of Metallic Materials
This standard is issued under the fixed designation E 604; 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.
1. Scope section area before fracture or the area of the projected plane of
the fracture surface.
1.1 This test method covers the dynamic tear (DT) test using
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specimens that are ⁄16 in. to ⁄8 in. (5 mm to 16 mm) inclusive
4. Summary of Test Method
in thickness.
4.1 The DT test involves a single-edge notched beam that is
1.2 This test method is applicable to materials with a
impact loaded in three-point bending, and the total energy loss
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minimum thickness of ⁄16 in. (5 mm).
during separation is recorded.
1.3 The pressed-knife procedure described for sharpening
4.2 The DT specimens are fractured with pendulum or
the notch tip generally limits this test method to materials with
drop-weight machines.
a hardness level less than 36 HRC.
NOTE 1—The designation 36 HRC is a Rockwell hardness number of 5. Significance and Use
36 on Rockwell C scale as defined in Test Methods E 18.
5.1 The DT energy value is a measure of resistance to rapid
progressive fracturing. In a number of applications, the en-
2. Referenced Documents
hanced resistance that may develop during about one plate
2.1 ASTM Standards:
thickness of crack extension from a sharp notch is of major
B 221 Specification for Aluminum-Alloy Extruded Bars,
interest. In the test method, a sufficiently long fracture path is
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Rods, Wire, Shapes, and Tubes
provided so that the results serve as a measure of this property.
E 18 Test Methods for Rockwell Hardness and Rockwell
5.2 Fracture surfaces of nonaustenitic steels tested in their
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Superficial Hardness of Metallic Materials
temperature transition region have areas that appear bright and
E 399 Test Method for Plane-Strain Fracture Toughness of
areas that appear dull. The bright, faceted appearing areas are
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Metallic Materials
termed “cleavage” fracture, and the dull appearing areas are
termed “shear” fracture after their respective mode of fracture
3. Terminology
on a micro scale.
3.1 Description of Terms Specific to this Standard
5.3 This test method can serve the following purposes:
3.2 Dynamic Tear (DT) Energy—the total energy required
5.3.1 In research and development, to evaluate the effects of
to fracture DT specimens tested in accordance with the
metallurgical variables such as composition, processing, or
provisions of this test method.
heat treatment, or of fabricating operations such as forming and
NOTE 2—With pendulum-type machines, the DT energy is the differ- welding on the dynamic tear fracture resistance of new or
ence between the initial and the final potential energies of the pendulum
existing materials.
or pendulums.
5.3.2 In service evaluation, to establish the suitability of a
NOTE 3—With drop-weight machines, the DT energy is the difference
material for a specific application only where a correlation
between the initial potential energy of the hammer and the final energy of
between DT energy and service performance has been estab-
the hammer as determined by a calibrated energy measurement system.
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lished.
3.3 Percent Shear Fracture Appearance—Percent shear
5.3.3 For information, specifications of acceptance, and
fracture appearance is the percent of the net section that
manufacturing quality control when a minimum DT energy is
fractured in a shear mode. Net section can be either the net
requested. Detailed discussion of the basis for determining
such minimum values in a particular case is beyond the scope
of this test method.
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This test method is under the jurisdiction of ASTM Committee E-28 on
6. Apparatus
Fracture Testing and is the direct responsibility of Subcommittee E28.07 on Impact
Testing.
6.1 General Requirements—The testing machine shall be
Current edition approved March 25, 1983. Published July 1983. Originally
published as a proposed test method in November 1975. Last previous edition
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E 604 –80. See Pellini, W. S., “Analytical Design Procedures for Metals of Elastic-Plastic
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Annual Book of ASTM Standards, Vol 02.02. and Plastic Fracture Properties,” Welding Research Council Bulletin 186, August
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Annual Book of ASTM Standards, Vol 03.01. 1973.
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E 604
either a pendulum type or a drop-weight type of capacity more
than sufficient to break the specimen in one blow. DT energy
values above 80 % o
...