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ASTM

ASTM D2211-00

(Test Method)

Standard Test Method for Elongation of Leather

Standard Test Method for Elongation of Leather

SCOPE
1.1 This test method covers the measurement of the elongation or stretch characteristics of leather produced by a tensile load. This test method is intended for use on all types of leather and with all of the breaking load tests. This test method does not apply to wet blue.  
1.2 The values given in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
09-Sep-2000
ICS
59.140.30 - Leather and furs
Technical Committee
D31 - Leather
Drafting Committee
D31.07 - Physical Properties
Current Stage
Ref Project

Relations

Replaced By
ASTM D2211-00(2005) - Standard Test Method for Elongation of Leather
Effective Date
01-Apr-2005
Referred By
ASTM D2208-16(2023) - Standard Test Method for Breaking Strength of Leather by the Grab Method
Effective Date
10-Sep-2000
Referred By
ASTM D2209-00(2021) - Standard Test Method for Tensile Strength of Leather
Effective Date
10-Sep-2000

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ASTM D2211-00 - Standard Test Method for Elongation of LeatherASTM D2211-00 - Standard Test Method for Elongation of Leather
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ASTM D2211-00 - Standard Test Method for Elongation of Leather
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation:D2211–00
Standard Test Method for
Elongation of Leather
This standard is issued under the fixed designation D 2211; 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.
1. Scope control, specification acceptance, and service evaluation of
leather. This test method may not apply when the conditions of
1.1 This test method covers the measurement of the elon-
the test employed differ widely from those specified in the test
gation or stretch characteristics of leather produced by a tensile
method.
load.This test method is intended for use on all types of leather
and with all of the breaking load tests. This test method does
5. Apparatus
not apply to wet blue.
5.1 Testing Machine, as described in Test Method D 2209.
1.2 The values given in inch-pound units are to be regarded
5.2 Dividers,havinglegsatleast4in.(102mm)longandan
as the standard. The values given in parentheses are for
adjustable screw arrangement for fixing the distance between
information only.
them.
1.3 This standard does not purport to address all of the
5.3 Steel Scale, graduated to read in 0.02 in. (0.5 mm).
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6. Test Specimen
priate safety and health practices and determine the applica-
6.1 The specimen shall be dumbbell in shape when the test
bility of regulatory limitations prior to use.
is made with the tension test. It shall be cut from the test unit
of leather by means of a die as shown in Fig. 1 of Test Method
2. Referenced Documents
D 2209. The direction of the long axis relative to the backbone
2.1 ASTM Standards:
shall be noted.
D 1610 Practice for Conditioning Leather and Leather
6.2 The specimen for narrow strap, welting, lace, and round
Products for Testing
2 belting leathers shall be a piece of leather uniform in width and
D 2209 Test Method for Tensile Strength of Leather
6 in. (152 mm) long.
3. Terminology 6.3 The specimen for the grab method of determining
breaking load shall be 6 in. (152 mm) long and 3 in. (76 mm)
3.1 Definitions:
wide.
3.1.1 elongation, or stretch—theincreaseinlengthofaspan
of specimen under tension.
7. Conditioning
4. Significance and Use 7.1 All specimens shall be conditioned as prescribed in
Practice D 1610. Conditioning other than as prescribed shall be
4.1 The elongation measurement may be made at any
noted in the results.
designated load and is expressed as a percentage of the original
distance between the jaws or between bench marks of the
8. Procedure
unstretched specimen. The speed of the machine is important.
8.1 Mount the specimen symmetrically with the jaws sepa-
Speeds under or more than 10 6 2 in./min (4.2 6 0.8 mm/s)
rated a distance of 4 in. (102 mm).
will give variables in the results, thus affecting the reproduc-
8.2 Operate the machine so that the movable grip travels at
ibility of the method. The direction relative to the backbone
a speed of 10 6 2 in./min (4.2 6 0.8 mm/s).
and the width of the test specimen determines the magnitude of
8.3 Follow the distance between the jaws or the difference
the elongation. This test method is excellent for development,
between bench marks with the dividers until the load at which
the elongation is desired has been reached. Take all measure-
This test method is under the jurisdiction ofASTM Committee D31 on Leather ments between the inner edges of the jaws or between the inner
and is the direct responsibility of Subcommittee D31.07 on Physical Properties—
edges of the bench marks. Measure the distance between the
General. This test method was developed in cooperation with theAmerican Leather
points of the legs of the dividers to the nearest 0.02 in. (0.5
Chemists Assn.
mm). An autographic attachment is preferred for determining
Current edition approved Sept. 10, 2000. Published October 2000. Originally
published as D 2211 – 63T. Last previous edition D 2211 – 94 (2000).
Annual Book of ASTM Standards, Vol 15.04.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D2211
the elongation. With this arrangement the elongation may be cent specimens in a skin taken from the official sampling
obtained from the chart at any desired load. position or from the sa
...

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