ASTM B753-86(1998)

Standard Specification for Thermostat Component Alloys

SCOPE
1.1 This specification describes requirements for alloys to be used as components in the manufacture of bonded multi-component thermostat metal strip. More specifically it describes alloys having composition, and thermal expansion suitable for application in thermostat metal sheet and strip.

General Information

• Status: Historical
• Publication Date: 09-May-2001
• ICS: 77.120.01 - Non-ferrous metals in general
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.10 - Thermostat Metals and Electrical Resistance Heating Materials

Relations

• Replaced By: ASTM B753-01 - Standard Specification for Thermostat Component Alloys
• Effective Date: 10-May-2001
• Referred By: ASTM B388-06(2018) - Standard Specification for Thermostat Metal Sheet and Strip
• Effective Date: 10-May-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: B 753 – 86 (Reapproved 1998) An American National Standard
Standard Specification for
Thermostat Component Alloys
This standard is issued under the fixed designation B 753; 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 5. Chemical Composition
1.1 This specification describes requirements for alloys to 5.1 The material shall be manufactured to the chemical
be used as components in the manufacture of bonded multi- compositions shown in Table 1.
component thermostat metal strip. More specifically it de- 5.2 The manufacturer will insure uniformity of composition
scribes alloys having composition, and thermal expansion throughout a heat lot to provide uniform thermal expansion and
suitable for application in thermostat metal sheet and strip. electrical resistivity properties.
2. Referenced Documents 6. Thermal Expansion Requirements
2.1 ASTM Standards: 6.1 Samples tested in accordance with 6.2 shall exhibit
A 480 Specification for General Requirements for Flat- thermal expansion properties described in Table 2.
Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and 6.2 One test sample representing each heat lot shall be
Strip machined to a suitable specimen configuration, heat treated in
B 63 Test Method for Resistivity of Metallically Conduct- accordance with instructions in Table 2, and Test Method
ing Resistance and Contact Materials E 228.
B 388 Specification for Thermostat Metal Sheet and Strip
7. Electrical Resistivity
E 18 Test Methods for Rockwell Hardness and Rockwell
Superficial Hardness of Metallic Materials 7.1 The electrical resistivity measured at room temperature
as in Test Method B 63 on suitably prepared and annealed
E 228 Test Method for Linear Thermal Expansion of Solid
Materials with a Vitreous Silica Dilatometer specimens shall conform to Table 3.
8. Temper
3. Ordering Information
3.1 Orders for this material under this specification shall 8.1 This product will be supplied in the annealed condition.
8.2 Hardness shall be measured on representative samples
include the following information:
3.1.1 Alloy type, from each heat treat lot and reported as Rockwell B hardness.
8.3 Hardness values shall conform to the requirements in
3.1.2 Size,
3.1.3 Surface finish, Table 4 tested as in Test Methods E 18.
3.1.4 Marking and packaging, and
9. Dimensions and Permissible Variations
3.1.5 Certification, if required.
9.1 Permissible variations in thickness and width shall
4. General Requirements
adhere to those described in Specification A 480. These are
shown in Table 5.
4.1 The material shall be free of scale, slivers, cracks,
seams, corrosion and other defects as best commercial practice 9.2 Edge camber shall conform to Specification A 480.
1 1
(Edge camber for widths >1- ⁄2 in. shall be a maximum ⁄4in. on
will permit. Surfaces shall be uniform and sufficiently clean so
that commonly used methods of surface preparation, or pre- any 8-ft length.)
9.3 Maximum deviation across the width of the strip at a
bond cleaning will allow bonding of the entire mating surfaces.
Since surface condition can vary for different alloys and given location shall not exceed 3 % of the nominal thickness.
9.4 Slitting burr shall be no greater than 10 % of the
because bonding practices vary, product surface condition can
be agreed upon between supplier and purchaser. thickness.
10. Certification
This test method is under the jurisdiction of ASTM Committee B-2 on
10.1 The manufacturer shall provide the purchaser with a
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.10 on Thermostat Metals. certification containing the following information:
Current edition approved Jan. 31, 1986. Published March 1986.
10.1.1 Alloy type,
Annual Book of ASTM Standards, Vol 01.03.
3 10.1.2 Specification number,
Annual Book of ASTM Standards, Vol 02.04.
Annual Book of ASTM Standards, Vol 03.01. 10.1.3 Dimensions,
Annual Book of ASTM Standards, Vol 14.02.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
B 753
10.1.4 Chemical composition by heat number, 11.2.3 Heat number,
10.1.5 Coefficient thermal expansion, 11.2.4 Size,
10.1.6 Hardness, 11.2.5 Shipped weight, and
10.1.7 Quantity shipped, 11.2.6 Purchaser’s order number.
10.1.8 Purchase order number,
12. Investigation of Claims
10.1.9 Resistivity (optional), and
10.1.10 Manufacturer’s name. 12.1 Where any material fails to meet the requirements of
the specification, the material so designated shall be handled in
11. Packaging and Marking
accordance with a mutual agreement between purchaser and
11.1 Packaging and unit size shipped shall be subject to seller.
agreement between purchaser and supplier. Packaging will be
13. Keywords
sufficient to prevent damage or spoilage in transit.
11.2 Marking shall contain the following information: 13.1 alloys; chemical composition; components; controlled
11.2.1 Manufacturer’s name, thermal expansion; electrical resistivity; hardness; temper;
11.2.2 Alloy type, thermostat metal strip
TABLE 1 Suggested Compositions For Thermostat Alloys All Elements Indicated As Weight Percent
NOTE 1—Composition requirements show major elements as being nominal. These nominal requirements indicate they are to be adjusted by the
manufacturer so that the alloys meet the requirements for thermal expansion shown in Table 2. Other elements not shown, may be present in residual
amounts. These shall not be present in sufficient quantity as to significantly affect the performance in the intended application.
Alloy
T-10 T-22 T-18 T-19 T-14 T-25 T-50
Description
Carbon 0.1 max 0.12 nom 0.15 max 0.5 nom 0.5 max 0.15 max 0.15 max
Manganese 72.0 nom 0.60 max 0.80 max 1.0 nom 9.0 nom 1.0 max 0.60 max
Silicon, max 0.25 0.30 0.50 0.40 0.30 1.0 0.40
Phosphorus, max 0.030
...