ASTM B208-06
(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
SIGNIFICANCE AND USE
The mechanical properties determined from test bars for sand, permanent mold, and centrifugal castings poured in accordance with this practice represent the properties of the metal going into castings poured from the same heat. These mechanical properties may not be the same as the properties of the corresponding castings because of the solidification effects of varying size, section, and design.
Test bars for continuous castings are taken from the castings and therefore represent the properties of the 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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Standards Content (Sample)
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Designation: B208 − 06 Endorsedby
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 B208; 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 Department of Defense.
1. Scope* wherever possible. If the castings are cast entirely in green
sand, partial cores shall be permitted for the test bars but in no
1.1 This practice establishes procedures for preparing test
case shall chills be permitted. Unless otherwise agreed upon
coupons and specimens (machined and unmachined) for ten-
between the manufacturer and purchaser, test bars may be
sion tests of copper alloys for sand, permanent mold, centrifu-
poured in cores on a production line. The use of filters in the
gal and continuous castings.
gating system is permitted.
1.2 The values stated in inch-pound units are the standard.
5.1.1 High-ShrinkageSand-CastAlloys—Thetestspecimen
SI values given in parentheses are for information only.
coupons for copper casting alloys exhibiting high shrinkage
during freezing and cooling shall be cast to the form and
2. Referenced Documents
dimensions shown in Fig. 1 (a or b) or 2 (a or b). If specimens
2
2.1 ASTM Standards:
having threaded ends are to be used in the tension tests, the
B846 Terminology for Copper and Copper Alloys 1
length of the keel blocks in Fig. 1a may be reduced to 6 ⁄4 in.
(159 mm). See Appendix X1 for SI equivalents.
3. Terminology
5.1.2 Low-Shrinkage Sand-Cast Alloys— The test specimen
3.1 Definitions of terms relating to copper alloys can be
coupons for copper casting alloys exhibiting low shrinkage
found in Terminology B846.
during freezing and cooling shall be cast to the form and
dimensionsshowninFig.2(AorB),Fig.3,orFig.4orasmay
4. Significance and Use
be prescribed in the casting specifications.
4.1 The mechanical properties determined from test bars for
5.2 CentrifugalCastings—Unlessotherwisespecifiedbythe
sand, permanent mold, and centrifugal castings poured in
purchaser, the manufacturer shall pour the test bars in the same
accordance with this practice represent the properties of the
type of mold as the castings themselves. That is, test bars for
metal going into castings poured from the same heat. These
sand mold castings shall be poured in sand molds, and test bars
mechanical properties may not be the same as the properties of
for chill mold castings shall be poured in chill molds.
the corresponding castings because of the solidification effects
5.2.1 The centrifugally cast test specimen coupons shall be
of varying size, section, and design.
cast to the form and dimensions of Fig. 5a.
4.2 Test bars for continuous castings are taken from the
5.2.2 Static test bar coupons shall be cast in open keel block
castings and therefore represent the properties of the castings.
molds as dimensioned in Fig. 5b.
5.3 Continuous Castings—Test bars shall be taken from the
5. Test Coupons
continuous cast product. Test bars may be taken before
5.1 Sand Castings—The test bar coupons shall be made by
mechanical straightening.
the same manufacturing process as the castings they represent
5.3.1 Test bar coupons shall be taken in a longitudinal
direction from the continuous cast product at the mid-wall of
1
This practice is under the jurisdiction ofASTM Committee B05 on Copper and hollow castings or at one-half the distance between the center
CopperAlloys and is the direct responsibility of Subcommittee B05.05 on Castings
and the side of solid castings as illustrated in Fig. 6.
and Ingots for Remelting.
5.3.2 For irregular shapes, the location of the test bar
Current edition approved Feb. 1, 2006. Published February 2006. Originally
coupon shall be as agreed upon between the manufacturer and
approved in 1946. Last previous edition approved in 2004 as B208 – 04. DOI:
10.1520/B0208-06.
purchaser.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.3.3 Transverse test specimens are allowed for continuous
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
cast product having a cross section thickness, diameter, or wall
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. of 4 in. or more. The cross sections are the diameter of a round
*A Summary of Changes section appears at the end of this standard
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