Standard Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition

SCOPE
1.1 This practice covers the sampling, for the determination of chemical composition (Note 1) of nonferrous metals and alloys in cast form for remelting or mechanical working.
1.1.1 Refer to Practice E255 for copper and copper alloys.
Note 1--The selection of correct portions of material and the preparation of a representative sample from such portions are necessary prerequisites to every analysis, the analysis being of no value unless the sample actually represents the average composition of the material from which it was selected.
1.2 When agreed upon between the purchaser and the manufacturer, the heat sample and analysis may be accepted as representative of the composition of the metal. In such cases, each lot must be properly identified with the heats from which it was made.
1.3 This practice is intended to cover the general principles of sampling applicable to nonferrous metals in cast form and is not intended to supersede or replace existing specification requirements for sampling of a particular material.
1.4 The values stated in inch-pound units are to be regarded as the standard.
1.5  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
31-Dec-2000
Current Stage
Ref Project

Relations

Effective Date
01-Jan-2001
Effective Date
01-Jan-2001

Buy Standard

Standard
ASTM E88-91(2001) - Standard Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
English language
2 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (Sample)


NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:E88–91(Reapproved 2001)
Standard Practice for
Sampling Nonferrous Metals and Alloys in Cast Form for
Determination of Chemical Composition
This standard is issued under the fixed designation E 88; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 This practice covers the sampling, for the determination 3.1 Definitions of Terms Specific to This Standard:
of chemical composition (Note 1) of nonferrous metals and 3.1.1 portion—the term “portion” is used in this practice to
alloys in cast form for remelting or mechanical working. designate the selected ingots, slabs, etc., from which the
1.1.1 Refer to Practice E 255 for copper and copper alloys. sample is prepared.
3.1.2 sample—the term “sample” is used in this practice to
NOTE 1—The selection of correct portions of material and the prepa-
designate the final form of the material submitted for analysis
ration of a representative sample from such portions are necessary
(drillings, millings, etc.). A representative sample may best be
prerequisites to every analysis, the analysis being of no value unless the
sample actually represents the average composition of the material from defined as a small part containing the same components in the
which it was selected.
same proportions as they occur in the relatively large mass of
the original lot or lots of material.
1.2 When agreed upon between the purchaser and the
manufacturer, the heat sample and analysis may be accepted as
4. Selection of Portion
representative of the composition of the metal. In such cases,
4.1 Aportion representative of the total shipment or lot shall
each lot must be properly identified with the heats from which
be taken for sampling. This portion shall be so selected that a
it was made.
minimum wastage of material is incurred, consistent with the
1.3 This practice is intended to cover the general principles
required accuracy in sampling.
of sampling applicable to nonferrous metals in cast form and is
4.2 The number of ingots, slabs, etc., selected to constitute
not intended to supersede or replace existing specification
this portion shall comply with the requirements of the ASTM
requirements for sampling of a particular material.
specifications covering that particular material.
1.4 The values stated in inch-pound units are to be regarded
as the standard.
5. Preparation of Sample
1.5 This standard does not purport to address all of the
5.1 Machinable materials shall be sampled by drilling,
safety concerns, if any, associated with its use. It is the
milling, or sawing. Materials that are too difficult to machine
responsibility of the user of this standard to establish appro-
may be ground or crushed.
priate safety and health practices and determine the applica-
5.2 Machinable materials in form of bar, billet, ingot, slab,
bility of regulatory limitations prior to use.
cake, etc., shall be sampled by drilling five holes approxi-
2. Referenced Documents mately 1.27 cm ( ⁄2 in.) in diameter at points equally spaced
between the ends of the pieces along a diagonal line. The
2.1 ASTM Standards:
drilling shall be through the total thickness and, if necessary,
E 255 Practice for Sampling Copper and Copper Alloys for
drilled from both directions, top and bottom.
Determination of Chemical Composition
5.3 Alternatively, any of the forms mentioned in 5.2 may be
milled or sawed at similar points through a section from side to
center or through an entire cross-section of the piece.
This practice is under the jurisdiction of ASTM Committee E01 on Analytical
Chemistry for Metals, Ores, and Related Materials and is the direct responsibility of
5.4 Materials too difficult to be machined, commonly in
Subcommittee E01.05 on Zn, Sn, Pb, Cd, Be, and Other Metals.
lump form, shall be reduced in size by passing through a jaw
Current edition approved Sept. 15, 1991. Published November 1991. Originally
or roll crusher or broken in a mortar to a particle size that will
published as E 88 – 50 T. Last previous edition E 88 – 58 (1986).
Annual Book of ASTM Standards, Vol 03.05. pass a No. 14 (1.40-mm) sieve.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.