1、Designation: B753 07 (Reapproved 2013)Standard Specification forThermostat Component Alloys1This standard is issued under the fixed designation B753; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A numb
2、er in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification describes requirements for alloys tobe used as components in the manufacture of bonded multi-component thermostat metal
3、strip. More specifically it de-scribes alloys having composition, and thermal expansionsuitable for application in thermostat metal sheet and strip.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that ar
4、e provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to become familiarwith all hazards including those identified in the appropria
5、teMaterial Safety Data Sheet (MSDS) for this product/materialas provided by the manufacturer, to establish appropriatesafety and health practices, and determine the applicability ofregulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A480/A480M Specification for General Req
6、uirements forFlat-Rolled Stainless and Heat-Resisting Steel Plate,Sheet, and StripB63 Test Method for Resistivity of Metallically ConductingResistance and Contact MaterialsB152/B152M Specification for Copper Sheet, Strip, Plate,and Rolled BarB162 Specification for Nickel Plate, Sheet, and StripB388
7、Specification for Thermostat Metal Sheet and StripE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE228 Test Method for Linear Thermal Expansion of SolidMaterials With a Push-Rod Dilatometer3. Ordering Information3.1 Orders for this material under this specification shallinclude the foll
8、owing information:3.1.1 Alloy type,3.1.2 Size,3.1.3 Surface finish,3.1.4 Marking and packaging, and3.1.5 Certification, if required.4. General Requirements4.1 The material shall be free of scale, slivers, cracks,seams, corrosion and other defects as best commercial practicewill permit. Surfaces shal
9、l be uniform and sufficiently clean sothat commonly used methods of surface preparation, or pre-bond cleaning will allow bonding of the entire mating surfaces.Since surface condition can vary for different alloys andbecause bonding practices vary, product surface condition canbe agreed upon between
10、supplier and purchaser.5. Chemical Composition5.1 The material shall be manufactured to the chemicalcompositions shown in Table 1.5.2 The manufacturer will insure uniformity of compositionthroughout a heat lot to provide uniform thermal expansion andelectrical resistivity properties. See Specificati
11、ons B152/B152M and B162.6. Thermal Expansion Requirements6.1 Samples tested in accordance with 6.2 shall exhibitthermal expansion properties described in Table 2.6.2 One test sample representing each heat lot shall bemachined to a suitable specimen configuration, heat treated inaccordance with instr
12、uctions in Table 2 and Test Method E228.7. Electrical Resistivity7.1 The electrical resistivity measured at room temperatureas in Test Method B63 on suitably prepared and annealedspecimens shall conform to Table 3.8. Temper8.1 This product will be supplied in the condition agreedupon by purchaser an
13、d seller.1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.10 on Thermostat Metals and Electrical Resistance Heating Materials.Current edition approved May 1, 2013. Published May 2013. Originallyappr
14、oved in 1986. Last previous edition approved in 2007 as B753 07. DOI:10.1520/B0753-07R13.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summ
15、ary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States18.2 Hardness shall be measured on representative samplesfrom each heat treat lot and reported as Rockwell B hardness.8.3 Hardness values in the annealed condi
16、tion shall conformto the requirements in Table 4 tested as in Test Methods E18.TABLE 1 Suggested Compositions For Thermostat Alloys All Elements Indicated As Weight PercentNOTE 1Composition requirements show major elements as being nominal. These nominal requirements indicate they are to be adjusted
17、 by themanufacturer so that the alloys meet the requirements for thermal expansion shown in Table 2. Other elements not shown, may be present in residualamounts. These shall not be present in sufficient quantity as to significantly affect the performance in the intended application.Alloy Description
18、 T-10 T-20 T-22 T-18 T-19 T-14 T-25Carbon 0.1 max 0.05 max 0.12 nom 0.15 max 0.5 nom 0.5 max 0.15 maxManganese 72.0 nom 6.5 nom 0.60 max 0.80 max 1.0 nom 9.0 nom 1.0 maxSilicon, max 0.25 0.3 0.30 0.50 0.40 0.30 1.0Phosphorus, max 0.030 0.02 0.025 0.025 0.025 0.025 0.025Sulfur, max 0.030 0.01 0.025 0
19、.025 0.025 0.025 0.025Chromium 0.25 max . 3.0 nom 11.0 nom 2.0 nom . 8.0 nomNickel, nom 10.0 20.0 22.0 18.0 19.0 14.0 25.0Copper 18.0 nom . . . . . .Aluminum . . . . . 5.0 nom .Cobalt . . . . . . .Iron 1.0 max balance balance balance balance balance balanceAlloy Description T-50 T-45 T-42 T-40 T-39
20、T-36 T-99Carbon, max 0.15 max 0.15 0.15 0.15 0.15 0.15 0.15Manganese, max 0.60 max 0.60 0.60 0.60 0.60 0.60 0.35Silicon, max 0.40 0.40 0.40 0.40 0.40 0.40 0.35Phosphorus, max 0.025 0.025 0.025 0.025 0.025 0.025 0.015Sulfur, max 0.025 0.025 0.025 0.025 0.025 0.025 0.010Chromium, max 0.50 max 0.50 0.5
21、0 0.50 0.50 0.25 0.50Nickel, nom 50.0 nom 45.0 42.0 40.0 39.0 36.0 99.5Copper . . . . . . 0.25 maxAluminum . . . . . . .Cobalt, max 0.50 max 0.50 0.50 0.50 0.50 0.50 0.50Iron balance balance balance balance balance balance 0.40 maxAlloy Description T-38 T-19A T-00Carbon, max 0.12 max 0.15 max .Manga
22、nese, 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 7.07.5 7 nom .Nickel, nom 38 nom 19 nom .Copper . . 94 minAluminum . . .Cobalt, max 0.5 max . .Iron balance balance .TABLE 2 Linear Expansion Coefficients Fo
23、r Thermostat Alloys Values Shown Are 106/F From 77F (25C) To Temperatures IndicatedAAlloyDescription200F(93C)300F(149C)B500F(260C)700F(371C)Anneal Temperature F (C)CT-10 15.1 15.4 (4 %) 15.6 16.6 1450 (788)T-20 10.9 11.1 (14 %) 11.4 11.5 1600 (871)T-22 10.7 10.75 (4.5 %) 10.9 10.9 1600 (871)T-18 10.
24、0 10.0 (4 %) 10.2 10.4 2000 (1093)T-19 11.1 10.8 (4 %) 11.2 11.2 1900 (1038)T-14 9.8 10.4 (4 %) 10.7 10.9 2000 (1093)T-25 9.8 9.8 (4 %) 10.0 10.1 1800 (982)T-50 5.7 5.6 (8 %) 5.7 5.6 1600 (871)T-45 4.4 4.3 (8 %) 4.1 4.0 1600 (871)T-42 3.1 3.0 (8 %) 2.9 3.0 1600 (871)T-40 2.0 2.2 (8 %) 2.2 3.0 1600 (
25、871)T-39 1.31.9 1.42.0 1.52.0 2.83.3 1600 (871)T-36 0.51.1 0.81.4 2.02.7 3.74.4 1600 (871)T-99 7.4 7.5 (4 %) 7.8 8.2 1300 (704)T-19A 10.2 10.4 (5 %) 10.5 10.7 2000 (1093)T-38 3.5 3.8 (6 %) 5.3 6.7 1700 (927)T-00 . 9.6 (5 %) . . 1200 (649)ALinear Thermal Expansion Coefficients shown in English units
26、in the above table can be converted to metric units (106/C) by multiplying the value in the table by 1.8.BRequired thermal expansion coefficient for each alloy class at 300F (149C) are shown with allowable tolerance. Values shown at 200F (93C). 500F (260C) and700F (371C) are typical and are provided
27、 for information only.CAnneal temperature is shown for each class of alloy to be treated prior to thermal expansion testing. Anneal to be performed in protective atmosphere (Non-oxidizing)for minimum one (1) hour, using heating rates up to 1000F/h, (538C/h) and cooling at rates 100 to 500F (38 to 26
28、0C) per hour.B753 07 (2013)29. Dimensions and Permissible Variations9.1 Permissible variations in thickness and width shalladhere to those described in Specification A480/A480M. Theseare shown in Table 5.9.2 Edge camber shall conform to Specification A480/A480M. (Edge camber for widths 112-in. shall
29、 be a maximum14 in. on any 8-ft length.)9.3 Maximum deviation across the width of the strip at agiven location shall not exceed 3 % of the nominal thickness.9.4 Slitting burr shall be no greater than 10 % of thethickness.10. Certification10.1 The manufacturer shall provide the purchaser with acertif
30、ication containing the following information:10.1.1 Alloy type,10.1.2 Specification number,10.1.3 Dimensions,10.1.4 Chemical composition by heat number,10.1.5 Coefficient thermal expansion,10.1.6 Hardness,10.1.7 Quantity shipped,10.1.8 Purchase order number,10.1.9 Resistivity (optional), andTABLE 3
31、Nominal Electrical Resistivity of Thermostat Alloys Values Shown Are Ohm Circular Mil/Ft. (Microhm-CM)NOTE 1When required, electrical resistivity shall meet the nominal values shown, within a tolerance of 4 %.NOTE 2Measurements are to be conducted on samples of uniform dimensions in accordance with
32、Test Method B63, on fully annealed specimensrepresenting each heat treat lot. Measurements are to be made at room temperature. 68 to 77F (20 to 25C).Alloy DesignationT-10 T-20 T-22 T-18 T-19 T-14 T-25 T-50 T-45 T-42 T-40 T-39 T-36 T-99 T-19A T-38 T-001020(170)472(78.5)461(77)475(79)468(78)660(110)51
33、5(85.6)245(40.7)330(54.8)370(61.5)380(63.2)425(70.6)485(80.6)51(8.5)460(76.5)570(94.8)10.9(1.8)TABLE 4 Maximum Rockwell B Hardness Required For Thermostat Alloys Annealed ConditionNOTE 1Hardness (Rb) shall be measured for representative samples from each heat treat lot processed at the same time.All
34、oy DesignationT-10 T-20 T-22 T-18 T-19 T-14 T-25 T-50 T-45 T-42 T-40 T-39 T-36 T-99 T-19A T-38 T-0065 70 66 73 78 90 72 72 72 72 72 72 72 64 72 70 60TABLE 5 Permissible Variations In Dimensions For Thermostat Alloy StripANOTE 1Thickness measurements are taken at least38 in. (9.52 mm) in from edge of
35、 the strip. Tolerances are applicable to measurements at alllocations.Permissible Variations In Thickness Values Shown Over And Under, in. (mm)Specified ThicknessWidths316 (4.76) to6 (152.4)6 (152.4) to13 (330.2)0.035 (0.89) to 0.050 (1.27) incl 0.0025 (0.064) 0.0035 (0.089)0.050 (1.27) to 0.069 (1.
36、75) incl 0.003 (0.08) 0.0035 (0.089)0.069 (1.75) to 0.100 (2.54) incl 0.003 (0.08) 0.004 (0.10)0.100 (2.54) to 0.125 (3.18) incl 0.004 (0.10) 0.0045 (0.114)0.125 (3.18) to 0.161 (4.09) incl 0.0045 (0.114) 0.0045 (0.114)0.161 (4.09) to 0.187 (4.76) incl 0.005 (0.13) 0.005 (0.13)Permissible Variations
37、 In Width, No. 3 Slit Edge Strip ValuesShown Over And Under, in. (mm)Specified ThicknessWidths0.5 (12.7) to6 (152.4)6 (152.4) to9 (228.6)9 (228.6) to13 (330.2)0.068 (1.73) and under 0.005 (0.13) 0.005 (0.13) 0.010 (0.25)0.099 (2.51) to 0.069 (1.75) incl 0.008 (0.20) 0.010 (0.25) 0.010 (0.25)0.160 (4
38、.06) to 0.100 (2.54) incl 0.010 (0.25) 0.016 (0.41) 0.016 (0.41)0.1875 (4.76) to 0.161 (4.09) incl 0.016 (0.41) 0.020 (0.51) 0.020 (0.51)AThis table is from Specification A480/A480M. For sizes not listed in the table above, refer to appropriate table in Specification A480/A480M.B753 07 (2013)310.1.1
39、0 Manufacturers name.11. Packaging and Marking11.1 Packaging and unit size shipped shall be subject toagreement between purchaser and supplier. Packaging will besufficient to prevent damage or spoilage in transit.11.2 Marking shall contain the following information:11.2.1 Manufacturers name,11.2.2 A
40、lloy type,11.2.3 Heat number,11.2.4 Size,11.2.5 Shipped weight, and11.2.6 Purchasers order number.12. Investigation of Claims12.1 Where any material fails to meet the requirements ofthe specification, the material so designated shall be handled inaccordance with a mutual agreement between purchaser
41、andseller.13. Keywords13.1 alloys; chemical composition; components; controlledthermal expansion; electrical resistivity; hardness; temper;thermostat metal stripASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this sta
42、ndard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be revi
43、ewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsib
44、le technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Co
45、nshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).B753 07 (2013)4
