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ASTM D1737-85

(Test Method)

Method of Test for Elongation of Attached Organic Coatings with Cylindrical Mandrel Apparatus (Withdrawn 1987)

Method of Test for Elongation of Attached Organic Coatings with Cylindrical Mandrel Apparatus (Withdrawn 1987)

General Information

Status
Withdrawn
ICS
87.040 - Paints and varnishes
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.23 - Physical Properties of Applied Paint Films
Current Stage
Ref Project

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ASTM D1737-85 - Method of Test for Elongation of Attached Organic Coatings with Cylindrical Mandrel Apparatus (Withdrawn 1987)ASTM D1737-85 - Method of Test for Elongation of Attached Organic Coatings with Cylindrical Mandrel Apparatus (Withdrawn 1987)
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ASTM D1737-85 - Method of Test for Elongation of Attached Organic Coatings with Cylindrical Mandrel Apparatus (Withdrawn 1987)
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Standards Content (Sample)

ASTM DI737 85 m 2575532 0025012 3 m
.- . - . ff -. -0q- 1.3
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Designation: D 1737 - 85
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I
AMERICAN SOCIETY FOR TESTING AND MATERIALS
1916 Race St., Philadelphia, Pa. ,19103
Reprinted from the Annual Book of AST-WI Standards, Copyright ASTM
If not listed io the current combined index, will appeat'in the next edition.
-.
Standard Test Method for
ELONGATiBN OF ATTACHED ORGANIC COATINGS WITH
CYLINDRICAL MANDREL APPARATUS'
This standard is issued under the fixed designation D 1737: 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.
Tliis test merliod lias been approved for iise by ageticies of the Department of Ddense to replace Melhod 6222 of Federal Test Meiliod
Standard No. 141.4 and for listing in lhe DoD index of SpeciJicaiions and Standards.
4. Significance and Use
1. Scope
1.1 This test method covers the determination 4.1 Coatings attached to substrates are elon-
gated when the substrates are bent during the
by the cylindrical test apparatus of the elongation
of attached organic coatings when applied to flat manufacture of articles or when the articles are
abused in service. This test method has been
sheet metal of uniform surface texture.
useful in rating attached coatings for their ability
1.2 This standard may involve hazardous ma-
terials, operafions, and equipment. This standard to resist cracking when elongated. It has been
useful in evaluating the flexibility of coatings on
does not purport to address all oJthe safity prob-
flexible substrates.
lems associated with its use. It is the responsibil-
ity of whoever uses this standard to consult and
5. Apparatus3
establish appropriate sajëty and health practices
and determine lhe applicability of regulatory limi- 5.1 Automatic Application Equipment, as de-
tations prior to use. scribed in Methods D 823.
5.2 Film Thickness Measuring Apparatus, as
described in Test Method D 1005 or in Methods
2. Applicable Documents
D 1186,
2.1 ASTM Standards:
5.3 Elongation Test Equipment, consisting of
D823 Methods of Producing Films of Uni-
six cylindrical steel rods having diameters of I
form Thickness of Paint, Varnish, Lacquer,
in. (25 mm), 3'4 in. (19 mm), Y2 in. (12.7 mm), 3/8
and Related Products on Test Panels2
in. (9.5 mm), 'h in. (6.4 mm), and Y8 in. (3.2
D 1005 Test Method for Measurement of Dry-
mm), and a means for firmly supporting them
Film Thickness of Organic Coatings Using
during a test.
Micromete3
D 1 186 Methods for Nondestructive Measure-
6. Preparation of Specimens
ment of Dry Film Thickness of Nonmag-
6.1 Apply the materials to be tested to cold
netic Coatings Applied to a Ferrous Base2
rolled steel (Note 1) conforming to the chemical
3. Summary of Method
' This test method is under the jurisdiction of ASTM Com-
3.1 The materials under test are applied at
mittee D-l on Paint and Related Coatings and Materials and is
of Subcommittee W I .23 on Physical
uniform thickness to flat sheet metal panels. the direct responsibility
Properties of Applied Paint Films.
After the coatings are dried or baked, the panels
Current edition approved Sept. 27. 1985. Published Novem-
are bent over cylindrical mandrels of various
ber 1985.Oiig¡naliy published as D 1737 - 60 T. Last previous
D 1737 - 62 (1979)c1.
edition
diameters. The elongation is determined from
' Amiral Book of ASTM Standards, Vol 06.0 1.
the largest diameter mandrel that produces visi-
'Suitable apparatus may be obtained from laboratory instru-
ment supply houses.
ble cracking in the coating.

---------------------- Page: 1 ----------------------
ASTM D3737 85 M 2575532 0025033 3 M -. .
.-
..
fail" test by determining whether cracking is produced
requirements of SAE steel No, 1OlÖ: dead soft,
by a specified mandrel size.
finish A, */3z in. (0.8 mm) in thickness (22 gage).
The surface preparation of the metal shall be
9. Calculations
agreed upon by the purchaser and the seller. Prior
to the application of the finish the edges of the
9. I Determine the elongation range of the ma-
panel shall be rounded slightly to remove burrs
terial from Table l in which the elongation of a
in order to eliminate anomalous edge effects. 1 mil (25 pm) thick coating on 'h-in. (0.8 mm)
Apply uniform coatings of the materials in ac-
cold rolled steel is given for each mandrel diam-
cordance with Methods D823 and air dry or
eter.
bake under conditions of humidity and temper- 9.2 If the coating thickness exceeds 1 mil (35
ature mutually agreeable to the purchaser and
pm), correct the determined elongation for film
seller.
thickness using the factors for each mandre
...

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