1、Designation: B 753 07Standard Specification forThermostat Component Alloys1This standard is issued under the fixed designation B 753; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parenthese
2、s indicates the year of last reapproval. Asuperscript epsilon (e) 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 strip. More spe
3、cifically 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 the standard. The values given in parentheses are forinformation only.1.3 This standard does not purport
4、 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 appropriateMaterial Safety Data Sheet (MSDS) for this product/materialas provided by the manufacturer, to
5、establish appropriatesafety and health practices, and determine the applicability ofregulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A 480/A 480M Specification for General Requirements forFlat-Rolled Stainless and Heat-Resisting Steel Plate,Sheet, and StripB63 Test Meth
6、od for Resistivity of Metallically Conduct-ing Resistance and Contact MaterialsB 152/B 152M Specification for Copper Sheet, Strip, Plate,and Rolled BarB 162 Specification for Nickel Plate, Sheet, and StripB 388 Specification for Thermostat Metal Sheet and StripE18 Test Methods for Rockwell Hardness
7、of MetallicMaterialsE 228 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 following information:3.1.1 Alloy type,3.1.2 Size,3.1.3 Surface finish,3.1.4 Marking and packa
8、ging, 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 shall be uniform and sufficiently clean sothat commonly used methods of surface preparation, o
9、r 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 supplier and purchaser.5. Chemical Composition5.1 The material shall be manufactured to th
10、e 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 Specifications B 152/B 152M and B 162.6. Thermal Expansion Requirements6.1 Samples tested in accordan
11、ce 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 instructions in Table 2 and Test Method E 228.7. Electrical Resistivity7.1 The electrical re
12、sistivity measured at room temperatureas in Test Method B63 on suitably prepared and annealedspecimens shall conform to Table 3.1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.10 on Thermostat Meta
13、ls and Electrical Resistance Heating Materials.Current edition approved May 1, 2007. Published June 2007. Originallyapproved in 1986. Last previous edition approved in 2001 as B 753 - 01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at servicea
14、stm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.TABLE 1 Suggested Compositions For Thermostat Alloys All El
15、ements Indicated As Weight PercentNOTE 1Composition requirements show major elements as being nominal. These nominal requirements indicate they are to be adjusted by themanufacturer so that the alloys meet the requirements for thermal expansion shown in Table 2. Other elements not shown, may be pres
16、ent in residualamounts. 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-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
17、.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 0.025 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
18、. . . . . .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 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 0.4
19、0 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 0.50 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 m
20、ax 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 .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,
21、 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 For Thermostat Alloys Values Shown Are 106/F From 77F (25C) To Temperatures IndicatedAAlloyDescription200F(93C)300F(149C)B500F(260C)700F(371
22、C)Anneal Temperature F (C)CT-10 15.1 15.4 (64 %) 15.6 16.6 1450 (788)T-20 10.9 11.1 (614 %) 11.4 11.5 1600 (871)T-22 10.7 10.75 (64.5 %) 10.9 10.9 1600 (871)T-18 10.0 10.0 (64 %) 10.2 10.4 2000 (1093)T-19 11.1 10.8 (64 %) 11.2 11.2 1900 (1038)T-14 9.8 10.4 (64 %) 10.7 10.9 2000 (1093)T-25 9.8 9.8 (6
23、4 %) 10.0 10.1 1800 (982)T-50 5.7 5.6 (68 %) 5.7 5.6 1600 (871)T-45 4.4 4.3 (68 %) 4.1 4.0 1600 (871)T-42 3.1 3.0 (68 %) 2.9 3.0 1600 (871)T-40 2.0 2.2 (68 %) 2.2 3.0 1600 (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 (64 %) 7.8 8.2 1300 (704
24、)T-19A 10.2 10.4 (65 %) 10.5 10.7 2000 (1093)T-38 3.5 3.8 (66 %) 5.3 6.7 1700 (927)T-00 . 9.6 (65 %) . . 1200 (649)ALinear Thermal Expansion Coefficients shown in English units in the above table can be converted to metric units (106/C) by multiplying the value in the table by1.8.BRequired thermal e
25、xpansion 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 for information only.CAnneal temperature is shown for each class of alloy to be treated prior to thermal expansion testing.
26、 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 260C) per hour.B7530728. Temper8.1 This product will be supplied in the condition agreedupon by purchaser and seller.8.2 Hardn
27、ess shall be measured on representative samplesfrom each heat treat lot and reported as Rockwell B hardness.8.3 Hardness values in the annealed condition shall conformto the requirements in Table 4 tested as in Test Methods E18.9. Dimensions and Permissible Variations9.1 Permissible variations in th
28、ickness and width shalladhere to those described in Specification A 480/A 480M.These are shown in Table 5.9.2 Edge camber shall conform to Specification A 480/A 480M. (Edge camber for widths 112-in. shall be a maxi-mum14 in. on any 8-ft length.)9.3 Maximum deviation across the width of the strip at
29、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 acertification containing the following information:10.1.1 Alloy type,TABLE 3 Nominal Electrical Resis
30、tivity 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 64%.NOTE 2Measurements are to be conducted on samples of uniform dimensions in accordance with Test Method B63, on full
31、y 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)515(85.6)245(40.7)330(54.8
32、)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.Alloy DesignationT-10 T-20
33、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 the strip. Tolerances a
34、re 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 (1.75) incl 0.003 (0.08) 0.
35、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 In Width, No. 3 Slit Ed
36、ge 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 (4.06) to 0.100 (2.54) inc
37、l 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 A 480/A 480M. For sizes not listed in the table above, refer to appropriate table in Specification A 480/A 480M.B75307310.1.2 Specification number,10.1.3
38、 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), and10.1.10 Manufacturers name.11. Packaging and Marking11.1 Packaging and unit size shipped shall be subject
39、 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 Alloy type,11.2.3 Heat number,11.2.4 Size,11.2.5 Shipped weight, and11.2.6 Purchasers order number.1
40、2. 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 andseller.13. Keywords13.1 alloys; chemical composition; components; controlledthermal expansion; e
41、lectrical 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 standard. Users of this standard are expressly advised that determination of the validity of any such
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44、ir 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 Conshohocken, 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).B753074
