ASTM A987-05
(Test Method)Standard Test Method for Measuring Shape Characteristics of Tin Mill Products
Standard Test Method for Measuring Shape Characteristics of Tin Mill Products
SIGNIFICANCE AND USE
The definitions and procedures for measuring shape characteristics of tin mill products are provided so that purchasers and suppliers have common measuring procedures and definitions of shape characteristics. These procedures provide definitions and measuring techniques of shape characteristics. The intention of these definitions and measuring methods is not to provide a dimensional specification for shape characteristics, but rather common procedure(s) for quantifying shape anomalies.
SCOPE
1.1 Shape is a significant quality characteristic for tin mill products. Plate-shape is affected by mill process factors plus the temper, thickness and width of the material supplied. It is the purpose of this test method to define accurately the different plate shape characteristics and to describe the method(s) most commonly used to measure particular characteristics.
1.2 Quantitative limits are not addressed and should be established on an individual producer and use basis, where appropriate.
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.
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Designation:A987–05
Standard Test Method for
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Measuring Shape Characteristics of Tin Mill Products
This standard is issued under the fixed designation A 987; 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 Plate, Single Reduced
A 626/A 626M Specification for Tin Mill Products, Elec-
1.1 Shape is a significant quality characteristic for tin mill
trolytic Tin Plate Double Reduced
products. Plate-shape is affected by mill process factors plus
A 650/A 650M Specification for Tin Mill Products, Black
the temper, thickness and width of the material supplied. It is
Plate, Double Reduced
thepurposeofthistestmethodtodefineaccuratelythedifferent
A 657/A 657M Specification for Tin Mill Products, Black
plate shape characteristics and to describe the method(s) most
Plate Electrolytic Chromium-Coated, Single and Double
commonly used to measure particular characteristics.
Reduced
1.2 Quantitative limits are not addressed and should be
established on an individual producer and user basis, where
3. Classification
appropriate.
3.1 The substrate shall conform to all the requirements of
1.3 This standard does not purport to address the safety
the appropriate specifications as follows: SpecificationsA 623,
concerns, if any, associated with its use. It is the responsibility
A 623M, A 599/A 599M, A 624/A 624M, A 625/A 625M,
of the user of this standard to establish appropriate safety and
A 626/A 626M, A 650/A 650M, and A 657.
health practices and to determine the applicability of regula-
tory limitations prior to use.
4. Significance and Use
2. Referenced Documents 4.1 The definitions and procedures for measuring shape
2 characteristics of tin mill products are provided so that pur-
2.1 ASTM Standards:
chasers and suppliers have common measuring procedures and
A 599/A 599M Specification for Tin Mill Products, Elec-
definitions of shape characteristics. These procedures provide
trolytic Tin Coated, Cold-Rolled Sheet
definitions and measuring techniques of shape characteristics.
A 623 SpecificationforTinMillProducts,GeneralRequire-
Theintentionofthesedefinitionsandmeasuringmethodsisnot
ments
toprovideadimensionalspecificationforshapecharacteristics,
A 623M Specification for Tin Mill Products, General Re-
but rather common procedure(s) for quantifying shape anoma-
quirements [Metric]
lies.
A 624/A 624M Specification for Tin Mill Products, Elec-
trolytic Tin Plate, Single Reduced
5. Interferences
A 625/A 625M Specification for Tin Mill Products, Black
5.1 Measurementofshapeoftenhasbeensubjective,atbest.
Successful measurement of various shape anomalies on quan-
titative terms requires recognition of several factors that can
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This test method is under the jurisdiction of ASTM Committee A01 on Steel,
interfere with accurate measurements.
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
5.1.1 Flat surfaces are required. Measurement of several
A01.20 on Tin Mill Products.
anomalies require laying of the sample on a flat surface. A
Current edition approved March 1, 2005. Published March 2005. Originally
approved in 1998. Last previous edition approved in 2000 as A 987 - 00.
machined flat surface is recommended. Laying a sample on a
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
floor may introduce error due to areas on a floor that are not
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
flat.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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A987–05
5.1.2 Several anomalies are measured by hanging the sheet. 7.1.2.2 Measure using the computer-based shape measuring
Hangingbyholdingthesamplewithahandcanintroduceerror instrument or other instrument of appropriate design.
from pressures exerted by fingers. A mechanical single device
7.2 Ridge Buckle, Quarter Buckle, Center Buckle (see Fig.
clamp to help hold these samples is recommended.
7):
5.1.3 Stepblock gages or tapered gages should be checked
7.2.1 Definition—These buckles are continuous deviations
regularly with a calibrated hand micrometer. Wear or dirt build
from a recognized flat surface occurring usually in narrow
up could affect accuracy.
width areas parallel to the rolling direction other than at the
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5.1.4 Computer-based shape measuring instrument table
sheet edges.
must be clean and the sensors must be in good condition. The
7.2.2 Measuring Methods:
sheet sample must be damage fr
...
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