ASTM B208-04
(Practice)Standard Practice for Preparing Tension Test Specimens for Copper Alloy Sand, Permanent Mold, Centrifugal, and Continuous Castings
Standard Practice for Preparing Tension Test Specimens for Copper Alloy Sand, Permanent Mold, Centrifugal, and Continuous Castings
SCOPE
1.1 This practice establishes procedures for preparing test coupons and specimens (machined and unmachined) for tension tests of copper alloys for sand, permanent mold, centrifugal and continuous castings.
1.2 The values stated in inch-pound units are the standard. SI values given in parentheses are for information only.
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Contact ASTM International (www.astm.org) for the latest information
Endorsed by
Designation:B208–04 American Foundrymen’s Society
Standard Practice for
Preparing Tension Test Specimens for Copper Alloy Sand,
1
Permanent Mold, Centrifugal, and Continuous Castings
This standard is issued under the fixed designation B 208; 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* case shall chills be permitted. Unless otherwise agreed upon
between the manufacturer and purchaser, test bars may be
1.1 This practice establishes procedures for preparing test
poured in cores on a production line. The use of filters in the
coupons and specimens (machined and unmachined) for ten-
gating system is permitted.
sion tests of copper alloys for sand, permanent mold, centrifu-
5.1.1 High-Shrinkage Sand-CastAlloys—The test specimen
gal and continuous castings.
coupons for copper casting alloys exhibiting high shrinkage
1.2 The values stated in inch-pound units are the standard.
during freezing and cooling shall be cast to the form and
SI values given in parentheses are for information only.
dimensions shown in Fig. 1 (a or b) or 2 (a or b). If specimens
2. Referenced Documents
having threaded ends are to be used in the tension tests, the
1
2
length of the keel blocks in Fig. 1a may be reduced to 6 ⁄4 in.
2.1 ASTM Standards:
(159 mm). See Appendix X1 for SI equivalents.
B 846 Terminology for Copper and Copper Alloys
5.1.2 Low-Shrinkage Sand-Cast Alloys—The test specimen
3. Terminology
coupons for copper casting alloys exhibiting low shrinkage
during freezing and cooling shall be cast to the form and
3.1 Definitions of terms relating to copper alloys can be
dimensionsshowninFig.2(AorB),Fig.3,orFig.4orasmay
found in Terminology B 846.
be prescribed in the casting specifications.
4. Significance and Use
5.2 Centrifugal Castings—Unless otherwise specified by
the purchaser, the manufacturer shall pour the test bars in the
4.1 The mechanical properties determined from test bars for
same type of mold as the castings themselves. That is, test bars
sand, permanent mold, and centrifugal castings poured in
for sand mold castings shall be poured in sand molds, and test
accordance with this practice represent the properties of the
bars for chill mold castings shall be poured in chill molds.
metal going into castings poured from the same heat. These
5.2.1 The centrifugally cast test specimen coupons shall be
mechanical properties may not be the same as the properties of
cast to the form and dimensions of Fig. 5.
the corresponding castings because of the solidification effects
5.3 Continuous Castings—Test bars shall be taken from the
of varying size, section, and design.
continuous cast product. Test bars may be taken before
4.2 Test bars for continuous castings are taken from the
mechanical straightening.
castings and therefore represent the properties of the castings.
5.3.1 Test bar coupons shall be taken in a longitudinal
5. Test Coupons
direction from the continuous cast product at the mid-wall of
hollow castings or at one-half the distance between the center
5.1 Sand Castings—The test bar coupons shall be made by
and the side of solid castings as illustrated in Fig. 6.
the same manufacturing process as the castings they represent
5.3.2 For irregular shapes, the location of the test bar
wherever possible. If the castings are cast entirely in green
coupon shall be as agreed upon between the manufacturer and
sand, partial cores shall be permitted for the test bars but in no
purchaser.
5.3.3 Transverse test specimens are allowed for continuous
1
This practice is under the jurisdiction ofASTM Committee B05 on Copper and
cast product having a cross section thickness, diameter, or wall
CopperAlloys and is the direct responsibility of Subcommittee B05.05 on Castings
of 4 in. or more. The cross sections are the diameter of a round
and Ingots for Remelting.
solid, the distance across flats of a solid hexagon, the thickness
Current edition approved May 1, 2004. Published June 2004. Originally
approved in 1946. Last previous edition approved in 2003 as B 208 – 96 (2003).
of a rectangle, and the wall thickness of a tube.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.4 Permanent Mold Castings—The test bar coupons shall
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
be made in the permanent die for test bars shown in Fig. 7 or
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Fig. 9. The runner, gate, and risers shall be coated wit
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