ASTM B603-07(2013)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:B603 −07 (Reapproved 2013)
Standard Specification for
Drawn or Rolled Iron-Chromium-Aluminum Alloys for
Electrical Heating Elements
This standard is issued under the fixed designation B603; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.1 lot size, n—the lot size for determining compliance
with the requirements of this specification shall be one heat.
1.1 This specification covers annealed, drawn, or rolled
shapes for electrical heating and resistance purposes of alloys
4. Significance and Use
consistingmainlyofiron,chromium,andaluminumasdetailed
4.1 This specification on iron-chromium-aluminum alloys
in Table 1.
contains the requirements for chemistry, electrical resistance,
1.2 The values stated in inch-pound units are to be regarded
mechanicalproperties,resistancechangewithtemperature,and
as standard. The values given in parentheses are mathematical
packaging.
conversions to SI units that are provided for information only
4.2 Determination of properties is not required for routine
and are not considered standard.
acceptance of material unless specified by the purchaser.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Chemical Requirements
responsibility of the user of this standard to become familiar
5.1 The alloys shall conform to the requirements as to
with all hazards including those identified in the appropriate
chemical composition prescribed in Table 1.
Material Safety Data Sheet (MSDS) for this product/material
as provided by the manufacturer, to establish appropriate 5.2 Samples for Chemical Analysis—Specimens for chemi-
safety and health practices, and determine the applicability of
calanalysismaybetakeneitherfromthemeltorfromasample
regulatory limitations prior to use. of finished material that is representative of the lot.
5.3 Chemical Analysis—The chemical analysis shall be
2. Referenced Documents
made in accordance with accepted practices. See Test Methods
2.1 ASTM Standards:
A751.
A751 Test Methods, Practices, and Terminology for Chemi-
6. Physical Requirements
cal Analysis of Steel Products
B63 Test Method for Resistivity of Metallically Conducting
6.1 The material shall be thoroughly and uniformly an-
Resistance and Contact Materials
nealed.
B70 Test Method for Change of Resistance With Tempera-
6.2 Wire shall conform to the following elongation require-
ture of Metallic Materials for Electrical Heating
ments:
B78 Test Method of Accelerated Life of Iron-Chromium-
Size Elongation in
Aluminum Alloys for Electrical Heating
10-in. (250-mm)
minimum, %
0.0035 in. (No. 39 Awg)(0.089 mm) and larger 12
3. Terminology
0.0031 to 0.0020 in. (Nos. 40 to 44 Awg) 6
3.1 Definitions:
(0.079 to 0.015 mm)
7. Nominal Resistivity
7.1 The nominal resistivity shall be the resistivity of the
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
wire as quenched from a temperature above 1450°F (788°C).
B02.10 on Thermostat Metals and Electrical Resistance Heating Materials.
The numerical values of the resistivity range at 77°F (25°C)
Current edition approved May 1, 2013. Published May 2013. Originally
shall be as shown in Table 1.
approved in 1975. Last previous edition approved in 2007 as B603 – 07. DOI:
10.1520/B0603-07R13.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 8. Test for Resistivity
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
8.1 The resistivity shall be determined in accordance with
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Test Method B63.
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B603−07 (2013)
TABLE 1 Chemical Requirements TABLE 2 Electrical Resistance Tolerance
Class Resistivity Range Composition Range, % Resistance
Ω·cmil/ft µΩ·cm Al Cr Tolerance, %
I 825 to 920 135 to 150 5.00 to 6.00 20 to 24 Round Wire:
IIA 795 to 880 130 to 144 4.75 to 5.75 20 to 24 0.0050-in. (0.127-mm) diameter and larger ±5
IIB 770 to 855 130 to 144 4.00 to 5.25 20 to 24 Finer than 0.0050 to 0.0020-in. (0.127 to ±8
0.051-mm) diameter, incl
III 715 to 785 119 to 1
...