ASTM B603-90(1995)e1

Standard Specification for Drawn or Rolled Iron-Chromium-Aluminum Alloys for Electrical Heating Elements

SCOPE
1.1 This specification covers annealed, drawn, or rolled shapes for electrical heating and resistance purposes of alloys consisting mainly of iron, chromium, and aluminum as detailed in Table 1.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

General Information

• Status: Historical
• Publication Date: 31-Dec-2000
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.10 - Thermostat Metals and Electrical Resistance Heating Materials

Relations

• Replaced By: ASTM B603-90(2001) - Standard Specification for Drawn or Rolled Iron-Chromium-Aluminum Alloys for Electrical Heating Elements
• Effective Date: 01-Jan-2001

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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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.
e1
Designation: B 603 – 90 (Reapproved 1995) An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Drawn or Rolled Iron-Chromium-Aluminum Alloys for
Electrical Heating Elements
This standard is issued under the fixed designation B 603; 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.
e NOTE—Section 15 was added editorially in June 1995.
TABLE 1 Chemical Requirements
1. Scope
1.1 This specification covers annealed, drawn, or rolled
Class Resistivity Range Composition Range, %
shapes for electrical heating and resistance purposes of alloys
V·cmil/ft μV·cm Al Cr
consisting mainly of iron, chromium, and aluminum as detailed
I 825 to 920 135 to 150 5.00 to 6.00 20 to 24
in Table 1. IIA 795 to 880 130 to 144 4.75 to 5.75 20 to 24
IIB 770 to 855 130 to 144 4.00 to 5.25 20 to 24
1.2 The values stated in inch-pound units are to be regarded
III 715 to 785 119 to 130 3.75 to 4.75 13 to 16
as the standard. The values given in parentheses are for
IV 665 to 735 111 to 122 2.75 to 3.75 12 to 15
information only.
2. Referenced Documents
chemical composition prescribed in Table 1.
2.1 ASTM Standards: 5.2 Samples for Chemical Analysis—Specimens for chemi-
cal analysis may be taken either from the melt or from a sample
A 751 Test Methods, Practices, and Terminology for
of finished material that is representative of the lot.
Chemical Analysis of Steel Products
5.3 Chemical Analysis—The chemical analysis shall be
B 63 Test Method for Resistivity of Metallically Conduct-
made in accordance with accepted practices.
ing Resistance and Contact Materials
B 70 Test Method for Change of Resistance with Tempera-
6. Physical Requirements
ture of Metallic Materials for Electrical Heating
6.1 The material shall be thoroughly and uniformly an-
B 78 Method for Accelerated Life Test of Iron-Chromium-
nealed.
Aluminum Alloys for Electrical Heating
6.2 Wire shall conform to the following elongation require-
3. Terminology
ments:
3.1 Definitions:
Size Elongation in
10-in. (250-mm)
3.1.1 lot size—the lot size for determining compliance with
minimum, %
the requirements of this specification shall be one heat.
0.0035 in. (No. 39 Awg)(0.089 mm) and larger 12
0.0031 to 0.0020 in. (Nos. 40 to 44 Awg) 6
4. Significance and Use
(0.079 to 0.015 mm)
4.1 This specificiation on iron-chromium-aluminum alloys
7. Nominal Resistivity
contains the requirements for chemistry, electrical resistance,
7.1 The nominal resistivity shall be the resistivity of the
mechanical properties, resistance change with temperature, and
wire as quenched from a temperature above 1450°F(788°C).
packaging.
The numerical values of the resistivity range at 77°F(25°C)
4.2 Determination of properties is not required for routine
shall be as shown in Table 1.
acceptance of material unless specified by the purchaser.
8. Test for Resistivity
5. Chemical Requirements
8.1 The resistivity shall be determined in accordance with
5.1 The alloys shall conform to the requirements as to
Test Method B 63.
9. Nominal Electrical Resistance for Unit Length
This specification is under the jurisdiction of ASTM Committee B-4 on
Metallic Materials for Thermostats and for Electrical Resistance, Heating and
9.1 The nominal resistance per unit length for round wire
Contacts and is the direct responsibility of Subcommittee B04.01 on Electrical
shall be calculated from the nominal resistivities and the
Heating and Resistance.
Current edition approved May 25, 1990. Published July 1990. Originally nominal cross-sectional area.
published as B 603 – 75. Last previous edition B 603 – 77.
NOTE 1—Actual values of resistivity and resistance change with tem-
Annual Book of ASTM Standards, Vol 01.03.
Annual Book of ASTM Standards, Vol 03.04. perature have no
...