ASTM B753-07(2013)

Standard Specification for Thermostat Component Alloys

ABSTRACT
This specification details the requirements for alloys to be used as components in the manufacture of bonded multi-component thermostat metal strip. It describes alloys having composition, and thermal expansion suitable for application in thermostat metal sheet and strip. The material shall be free of scale, slivers, cracks, seams, corrosion and other defects as best commercial practice will permit. Surfaces shall be uniform and sufficiently clean. Product surface condition can be agreed upon between supplier and purchaser since surface condition can vary for different alloys and because bonding practices vary. The material shall be made of carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, copper, aluminum, cobalt, and iron. This product shall be supplied in the condition agreed upon by purchaser and seller. Hardness shall be measured on representative samples from each heat treat lot.
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.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 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 become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Apr-2013
• 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

• Replaces: ASTM B753-07 - Standard Specification for Thermostat Component Alloys
• Effective Date: 01-May-2013
• Replaced By: ASTM B753-07(2018) - Standard Specification for Thermostat Component Alloys
• Effective Date: 01-Nov-2018
• Referred By: ASTM B388-06(2018) - Standard Specification for Thermostat Metal Sheet and Strip
• Effective Date: 01-May-2013

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:B753 −07 (Reapproved 2013)
Standard Specification for
Thermostat Component Alloys
This standard is issued under the fixed designation B753; 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 Materials With a Push-Rod Dilatometer
1.1 This specification describes requirements for alloys to
3. Ordering Information
be used as components in the manufacture of bonded multi-
3.1 Orders for this material under this specification shall
component thermostat metal strip. More specifically it de-
include the following information:
scribes alloys having composition, and thermal expansion
3.1.1 Alloy type,
suitable for application in thermostat metal sheet and strip.
3.1.2 Size,
1.2 The values stated in inch-pound units are to be regarded
3.1.3 Surface finish,
as standard. The values given in parentheses are mathematical
3.1.4 Marking and packaging, and
conversions to SI units that are provided for information only
3.1.5 Certification, if required.
and are not considered standard.
4. General Requirements
1.3 This standard does not purport to address all of the
4.1 The material shall be free of scale, slivers, cracks,
safety concerns, if any, associated with its use. It is the
seams, corrosion and other defects as best commercial practice
responsibility of the user of this standard to become familiar
will permit. Surfaces shall be uniform and sufficiently clean so
with all hazards including those identified in the appropriate
that commonly used methods of surface preparation, or pre-
Material Safety Data Sheet (MSDS) for this product/material
bond cleaning will allow bonding of the entire mating surfaces.
as provided by the manufacturer, to establish appropriate
Since surface condition can vary for different alloys and
safety and health practices, and determine the applicability of
because bonding practices vary, product surface condition can
regulatory limitations prior to use.
be agreed upon between supplier and purchaser.
2. Referenced Documents
5. Chemical Composition
2.1 ASTM Standards:
5.1 The material shall be manufactured to the chemical
A480/A480M Specification for General Requirements for
compositions shown in Table 1.
Flat-Rolled Stainless and Heat-Resisting Steel Plate,
5.2 The manufacturer will insure uniformity of composition
Sheet, and Strip
throughoutaheatlottoprovideuniformthermalexpansionand
B63 Test Method for Resistivity of Metallically Conducting
electrical resistivity properties. See Specifications B152/
Resistance and Contact Materials
B152M and B162.
B152/B152M Specification for Copper Sheet, Strip, Plate,
and Rolled Bar
6. Thermal Expansion Requirements
B162 Specification for Nickel Plate, Sheet, and Strip
6.1 Samples tested in accordance with 6.2 shall exhibit
B388 Specification for Thermostat Metal Sheet and Strip
thermal expansion properties described in Table 2.
E18 Test Methods for Rockwell Hardness of Metallic Ma-
terials
6.2 One test sample representing each heat lot shall be
E228 Test Method for Linear Thermal Expansion of Solid
machined to a suitable specimen configuration, heat treated in
accordance with instructions in Table 2 andTest Method E228.
1 7. Electrical Resistivity
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
7.1 The electrical resistivity measured at room temperature
B02.10 on Thermostat Metals and Electrical Resistance Heating Materials.
as in Test Method B63 on suitably prepared and annealed
Current edition approved May 1, 2013. Published May 2013. Originally
approved in 1986. Last previous edition approved in 2007 as B753 – 07. DOI: specimens shall conform to Table 3.
10.1520/B0753-07R13.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 8. Temper
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
8.1 This product will be supplied in the condition agreed
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. upon by purchaser and seller.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B753−07 (2013)
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 Description T-10 T-20 T-22 T-18 T-19 T-14 T-25
Carbon 0.1 max 0.05 max 0.12 nom 0.15 max 0.5 nom 0.5 max 0.15 max
Manganese 72.0 nom 6.5 nom 0.60 max 0.80 max 1.0 nom 9.0 nom 1.0 max
Silicon, max 0.25 0.3 0.30 0.50 0.40 0.30 1.0
Phosphorus, max 0.030 0.02 0.025 0.025 0.025 0.025 0.025
Sulfur, max 0.030 0.01 0.025 0.025 0.025 0.025 0.025
Chromium 0.25 max . 3.0 nom 11.0 nom 2.0 nom . 8.0 nom
Nickel, nom 10.0 20.0 22.0 18.0 19.0 14.0 25.0
Copper 18.0 nom . . . . . .
Aluminum . . . . . 5.0 nom .
Cobalt . . . . . . .
Iron 1.0 max balance balance balance balance balance balance
Alloy Description T-50 T-45 T-42 T-40 T-39 T-36 T-99
Carbon, max 0.15 max 0.15 0.15 0.15 0.15 0.15 0.15
Manganese, max 0.60 max 0.60 0.60 0.60 0.60 0.60 0.35
Silicon, max 0.40 0.40 0.40 0.40 0.40 0.40 0.35
Phosphorus, max 0.025 0.025 0.025 0.025 0.025 0.025 0.015
Sulfur, max 0.025 0.025 0.025 0.025 0.025 0.025 0.010
Chromium, max 0.50 max 0.50 0.50 0.50 0.50 0.25 0.50
Nickel, nom 50.0 nom 45.0 42.0 40.0 39.0 36.0 99.5
Copper . . . . . . 0.25 max
Aluminum . . . . . . .
Cobalt, max 0.50 max 0.50 0.50 0.50 0.50 0.50 0.50
Iron balance balance balance balance balance balance 0.40 max
Alloy Description T-38 T-19A T-00
Carbon, max 0.12 max 0.15 max .
Manganese, max 0.75 max 1.0 max .
Silicon, max 0.30 max 0.3 max .
Phosphorus, max 0.025 max 0.025 max .
Sulfur, max 0.025 max 0.025 max .
Chromium, max 7.0–7.5 7 nom .
Nickel, nom 38 nom 19 nom .
Copper . . 94 min
Aluminum . . .
Cobalt, max 0.5 max . .
Iron balance balance .
−6 A
TABLE 2 Linear Expansion Coefficients For Thermostat Alloys Values Shown Are 10 /°F From 77°F (25°C) To Temperatures Indicated
Alloy 200°F 300°F 500°F 700°F
C
Anneal Temperature °F (°C)
B
Description (93°C) (149°C) (260°C) (371°C)
T-10 15.1 15.4 (±4 %) 15.6 16.6 1450 (788)
T-20 10.9 11.1 (±1–4 %) 11.4 11.5 1600 (871)
T-22 10.7 10.75 (±4.5 %) 10.9 10.9 1600 (871)
T-18 10.0 10.0 (±4 %) 10.2 10.4 2000 (1093)
T-19 11.1 10.8 (±4 %) 11.2 11.
...