ASTM E1435-98

Standard Practice for Handling Densified Articles of Aluminum Oxide Reinforced with Silicon Carbide Whiskers (Withdrawn 2007)

SCOPE
1.1 This practice describes recommended procedures for the safe handling of densified articles made from nonfibrous aluminum oxide reinforced with silicon carbide whiskers.
1.2 The information in this practice is intended for a material safety data sheet (MSDS) for densified articles of aluminum oxide reinforced with silicon carbide whiskers.
1.3 This MSDS does not apply to products with a final density such that, during abrasion or other conditions of handling or use, SiC whiskers are released in excess of the limits of this practice.
1.4 Other materials may be included in the final product (for example, sintering aids); information specific to these additional materials should be included in each manufacturer's MSDS.
1.5 This standard does not purport to address all of the safety problems, 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. For specific hazard and precaution statements, see Sections 4, 6, 8, and 9.
WITHDRAWN RATIONALE
This practice covered recommended procedures to reduce health and safety problems, which may arise during the handling of densified articles made from nonfibrous aluminum oxide reinforced with silicon carbide (SiC) whiskers.
Formerly under the jurisdiction of Committee E34 on Occupational Health and Safety, this practice was withdrawn in 2007 in accordance with section 10.5.3.1 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.

General Information

• Status: Withdrawn
• Publication Date: 09-Apr-1998
• Withdrawal Date: 15-Feb-2007
• ICS: 71.060.20 - Oxides
• Technical Committee: E34 - Occupational Health and Safety

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: E 1435 – 98
Standard Practice for
Handling Densified Articles of Aluminum Oxide Reinforced
with Silicon Carbide Whiskers
This standard is issued under the fixed designation E 1435; 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 Operation of Local Exhaust Systems
2.3 Occupational Safety and Health Administration
1.1 This practice covers recommended procedures to reduce
(OSHA) Standard:
health and safety problems which may arise during the
OSHA 8-hour Time Weighted Average (TWA) Permissible
handling of densified articles made from nonfibrous aluminum
Exposure Limit (PEL) for alpha-Alumina from U.S. Code
oxide reinforced with silicon carbide (SiC) whiskers.
of Federal Regulations (CFR) 29 CFR 1910.1000, Air
1.2 The information in this practice may be considered for
Contaminants, Table Z-1, 1994
use in a manufacturer’s material safety data sheet (MSDS) for
densified articles of aluminum oxide reinforced with SiC
3. Terminology
whiskers.
3.1 Definitions:
1.3 This practice applies to finished articles where neither
3.1.1 aspect ratio, n—ratio of whisker length to whisker
SiC whiskers nor aluminum oxide are released during use in
diameter.
excess of the limits of this practice.
3.1.2 respirable silicon carbide whiskers, n—a crystalline
1.4 Other materials may be included in the article (for
silicon carbide fiber, approximately cylindrical in shape, with a
example, sintering aids); information specific to these addi-
diameterlessthan3.0µmandanaspectratioequaltoorgreater
tional materials should be included in each manufacturer’s
than 5:1.
MSDS.
1.5 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 Handling or use of densified articles of aluminum oxide
responsibility of the user of this standard to establish appro-
reinforced with SiC whiskers is not expected to be hazardous
priate safety and health practices and determine the applica-
due to the presence of SiC whiskers unless the whiskers are
bility of regulatory limitations prior to use. For specific hazard
released through a material removal process, such as (re)grind-
and precaution statements, see Sections 5, 7, 9 and 10.
ing.
2. Referenced Documents 4.2 Thispracticeprovidesguidance,characteristicsanddata
2 for handling and use of densified articles of aluminum oxide
2.1 ASTM Standards:
reinforced with SiC whiskers. It also provides guidance for
E 1437 Practice for Handling Respirable Silicon Carbide
determiningwhen(re)finishingorotherprocessingofdensified
Whiskers
articles of aluminum oxide reinforced with SiC whiskers will
E 1718 Guide for Administrative and Engineering Controls
generate potentially hazardous conditions, and provides refer-
for Silicon Carbide Whisker Work Areas
ence to relevant standards. If SiC whiskers are released, the
2.2 American National Standards Institute (ANSI) Stan-
3 implementation of Practice E 1437 may be required.
dard:
4.3 This practice is intended for use by health and safety
ANSIZ9.2—1979 FundamentalsGoverningtheDesignand
professionals in determining whether an excessive exposure
exists, in preparing procedures to establish a safe work
environment, and in preparing relevant documentation.
This practice is under the jurisdiction of ASTM Committee E34 on Occupa-
tional Health and Safety and is the direct responsibility of Subcommittee E34.70 on
5. Hazardous Ingredients/Identity Information
Single Crystal Ceramic Whiskers.
5.1 Densified Articles—Densified articles of aluminum ox-
Current edition approved April 10, 1998. Published June 1998. Originally
published as E 1435 – 91. Last previous edition E 1435 – 91. idereinforcedwithsiliconcarbidewhiskersarenotexpectedto
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
produce exposures which are hazardous to health. However
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 4
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St., Available from the Superintendent of Documents, U.S. Government Printing
4th Floor, New York, NY 10036, http://www.ansi.org. Office, Washington, DC 20402.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
E1435–98
(re)finishing the article as discussed in Section 10 will produce 8. Reactivity Data
fine particles of potentially hazardous ingredients which can be
8.1 The following data are relevant when preparing an
inhaled, swallowed or come in contact with the skin or eyes.
MSDSfordensifiedarticlesofaluminumoxidereinforcedwith
5.2 Hazardous Ingredients (specific chemical identity—
SiC whiskers:
common name(s)):
8.1.1 Stability—Stable.
5.2.1 Silicon Carbide (SiC) Whiskers—An acicular form of
8.1.2 Conditions to Avoid—None.
silicon carbide, which is Chemical Abstract Service (CAS)
8.1.3 Incompatibility (materials to avoid)—None under
409-21-2.ACASnumberspecifictoSiCwhiskershasnotbeen
conditions of normal use.
assigned. OSHA PELs for SiC whiskers have not been estab-
8.1.4 Hazardous Polymerization—Will not oc
...