1、Designation: B388 06 (Reapproved 2012)Standard Specification forThermostat Metal Sheet and Strip1This standard is issued under the fixed designation B388; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、 number 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 covers thermostat metals in the formof sheet or strip that are used for the temperature-sensitiveelements of device
3、s for controlling, compensating, or indicat-ing temperature and is intended to supply acceptance require-ments to purchasers ordering this material by type designation.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions
4、 to SI units that are 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 identif
5、ied in the appropriateMaterial 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:2B63 Test Method for
6、Resistivity of Metallically ConductingResistance and Contact MaterialsB106 Test Methods for Flexivity of Thermostat MetalsB223 Test Method for Modulus of Elasticity of ThermostatMetals (Cantilever Beam Method)B362 Test Method for Mechanical Torque Rate of SpiralCoils of Thermostat MetalB389 Test Met
7、hod for Thermal Deflection Rate of Spiraland Helical Coils of Thermostat MetalB478 Test Method for Cross Curvature of ThermostatMetalsB753 Specification for Thermostat Component AlloysC351 Test Method for Mean Specific Heat of ThermalInsulation3E92 Test Method for Vickers Hardness of Metallic Materi
8、-als3E384 Test Method for Knoop and Vickers Hardness ofMaterials3. Terminology3.1 Definition:3.1.1 thermostat metal, na composite material comprisingtwo or more metallic layers of differing coefficients of thermalexpansion such that the radius of curvature of the compositechanges with temperature ch
9、ange.4. Ordering Information4.1 Orders for material under this specification shall includethe following information:4.1.1 Type designation (Table 1 and Table 2),4.1.2 Thickness (see 9.1),4.1.3 Width (see 9.2),4.1.4 Temper (designated as percent cold reduction asneeded),4.1.5 Marking to identify vend
10、or, type, high-expansion sideor low-expansion side,4.1.6 Weight.5. Material Segregation5.1 The thermostat metal shall be supplied segregated intotwo groups after slitting: (1) the burr on the low-expansivecomponent, and (2) the burr on the high-expansive component.These two groups shall be identifie
11、d and packaged separatelyor together as mutually agreed upon between the producer andthe user.6. Chemical Composition6.1 The nominal composition of component materials isgiven in Table 1.1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the dir
12、ect responsibility of SubcommitteeB02.10 on Thermostat Metals and Electrical Resistance Heating Materials.Current edition approved May 1, 2012. Published May 2012. Originallyapproved in 1962. Last previous edition approved in 2006 as B388 06. DOI:10.1520/B0388-06R12.2For referenced ASTM standards, v
13、isit 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 Summary page onthe ASTM website.3Withdrawn. The last approved version of this historical standard is referencedon www.astm.org
14、.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.TABLE 1 CompositionNOTE 1TM6 and TM7 are no longer manufactured due to availability, difficulty to produce, commercial interest, or combinations thereof.ElementASTM TypeTM1 TM2 TM3 TM4
15、 TM5 TM8 TM9Nominal chemical high-expansive nickel 22 10 25 25 25 10 22composition, component chromium 3 . 8.5 8.5 8.5 . 3weight,% manganese . 72 . . . 72 .copper . 18 . . . 18 .iron 75 . 66.5 66.5 66.5 . 75aluminum . . . . . . .carbon . . . . . . .intermediatecomponentnickelmanganese.100.low-expans
16、ivecomponentnickelironcobalt3664.3664.4258.4555.5050.3664.3664.Component ratio,thickness, %high-expansivecomponent50 53 50 50 50 80 27intermediatecomponent. . . . . . 46low-expansivecomponent50 47 50 50 50 20 27ElementASTM TypeTM10 TM11 TM12 TM13 TM14 TM15 TM16Nominal chemical high-expansive nickel
17、22 22 22 22 22 22 22composition, component chromium 3 3 3 3 3 3 3weight,% manganese . . . . . . .copper . . . . . . .iron 75757575757575aluminum . . . . . . .carbon . . . . . . .intermediatecomponentnickelmanganese100.100.100.100.100.100.100.low-expansivecomponentnickelironcobalt3664.3664.3664.3664.
18、3664.3664.3664.Component ratio,thickness, %high-expansivecomponent34 36 40 42 44 47 48intermediatecomponent32 28 20 16 12 6 4low-expansivecomponent34 36 40 42 44 47 48ElementASTM TypeTM17 TM18 TM19 TM20 TM21 TM22 TM23Nominal chemical high-expansive nickel 22 19.4 19.4 18 18 100 10composition, compon
19、ent chromium 3 2.25 2.25 11.5 11.5 . .weight,% manganese . . . . . . 72copper . . . . . . 18iron 75 78.3 78.3 70.5 70.5 . .aluminum . . . . . . .carbon . 0.5 0.5 . . . .intermediatecomponentnickelmanganese100.low-expansivecomponentnickelironcobalt3664.4258.3961.3664.4258.3664.4258.Component ratio,th
20、ickness,%high-expansivecomponent49 50 50 50 50 50 54intermediatecomponent2 . . . . . .low-expansivecomponent49 50 50 50 50 50 46B388 06 (2012)26.1.1 The component alloys shall be as specified in Speci-fication B753.7. Component Ratio7.1 The typical thickness ratio of the component materials isgiven
21、in Table 1. The component thickness ratios are given forreference as they are lot-to-lot variable to produce requiredflexivity and resistivity. Barrier(s) layer(s) for stability ofresistivity is (are) allowable. Flexivity may vary.8. Physical Requirements8.1 Maximum Sensitivity RangeThe temperature
22、rangesof maximum thermal response of designated types of thermo-stat metals are given in Table 2 and Table 3. These are nominalvalues presented only to aid users in designing devices.8.2 Maximum Recommended TemperatureThe maximumrecommended temperatures of use of designated types ofthermostat metals
23、 are given in Table 2 and Table 3. Thesevalues are presented to aid users in designing devices.TABLE 1 ContinuedASTM TypeElement TM24 TM25 TM26 TM27 TM28 TM29 TM30Nominal chemical high-expansive nickel 22 22 22 22 22 20 22composition, component chromium 3 3 3 3 3 . 3weight, % manganese . . . . . 6.5
24、 .copper . . . . . . .iron 75 75 75 75 75 73.5 75aluminum . . . . . . .carbon . . . . . . .intermediatecomponentcoppermanganese100.100.100.100.100.low-expansivecomponentnickelironcobalt3664.3664.3664.3664.3664.3664.4258.ASTM TypeTM24 TM25 TM26 TM27 TM28 TM29 TM30resistivity ohm cirmil/ft20 30 50 70
25、90 477 415Component ratio,thickness, %high-expansivecomponent10 20 31 38 42 50 50intermediatecomponent53 35 20 14 10 . .low-expansivecomponent37 45 49 48 48 50 50ASTM TypeElement TM31 TM32 TM33 TM34 TM35 TM36Nominal chemical high-expansive nickel 10 10 10 10 19 25composition, component chromium . .
26、. . 2 8weight, % manganese 72 72 72 72 . .copper 18 18 18 18 . .iron . . . . 79 67aluminum . . . . . .carbon . . . . . .intermediatecomponentcoppermanganese100.100.100.100.low-expansivecomponentnickelironcobalt3664.3664.3664.3664.3664.3664.ASTM TypeTM31 TM32 TM33 TM34 TM35 TM36resistivity ohm cirmil
27、/ft30 150 50 70 482 500Component ratio,thickness, %high-expansivecomponent26 50 42 45 50 50intermediatecomponent38 6 21 15 . .low-expansivecomponent36 44 37 40 50 50B388 06 (2012)3TABLE 2 Properties of Thermostat Metals (Inch-Pound Units)NOTE 1TM6 and TM7 are no longer manufactured due to availabili
28、ty, difficulty to produce, commercial interest, or combinations thereof.Properties UnitsASTM TypeTM1 TM2 TM3 TM4 TM5 TM8 TM9Maximum sensitivitytemperature rangeF 0 to 300 0 to 400 200 to 600 250 to 700 300 to 850 0 to 400 0 to 300Maximum recommendedtemperatureF 1000 500 1000 1000 1000 500 900Flexivi
29、ty 3 10650 to 200F 15.0 6 5 % 21.7 6 5 % 10.4 6 6% 8.66 6% 6.46 6 % 15.6 6 8% 11.56 10 %100 to 300F 14.6 6 5 % 21.1 6 5 % 10.6 6 6% 9.06 6% 6.66 6 % 15.6 6 8% 11.26 10 %Heat treatment F 700 500 700 700 700 500 700Electrical resistivity at Vcmil/ft 475 6 4 % 675 6 5 % 435 6 4 % 400 6 4 % 345 6 5 % 85
30、0 6 5 % 100 6 5.5 %75F Vmil2/ft 373 6 4 % 530 6 5 % 342 6 4 % 314 6 4 % 271 6 5% 6686 5% 786 5.5 %Modulus of elasticity psi 3 10625 20 25 25 25.5 19.5 26Density lb/in.30.29 0.28 0.29 0.29 0.29 0.27 0.31TM10 TM11 TM12 TM13 TM14 TM15 TM16Maximum sensitivitytemperature rangeF 0 to 300 0 to 300 0 to 300
31、 0 to 300 0 to 300 0 to 300 0 to 300Maximum recommendedtemperatureF 900 900 900 900 900 900 900Flexivity 3 10650 to 200F 13.1 6 6 % 13.2 6 6 % 13.76 5.5 % 14.0 6 5.5 % 14.7 6 5.5 % 14.8 6 5.5 % 14.9 6 5.5 %100 to 300F 12.7 6 6 % 13.3 6 6 % 13.7 6 5.5 % 14.0 6 5.5 % 14.3 6 5.5 % 14.4 6 5.5 % 14.6 6 5
32、.5 %Heat treatment F 700 700 700 700 700 700 700Electrical resistivity at Vcmil/ft 125 6 5.5 % 150 6 5.5 % 175 6 5.5 % 200 6 5.5 % 250 6 5.5 % 300 6 5.5 % 350 6 5.5 %75F Vmil2/ft 98 6 5.5 % 118 6 5.5 % 137 6 5.5 % 157 6 5.5 % 196 6 5.5 % 236 6 5.5 % 2756 5.5 %Modulus of elasticity psi 3 10626 26 25.
33、5 25.5 25.5 25 25Density lb/in.30.30 0.30 0.30 0.30 0.30 0.30 0.29TM17 TM18 TM19 TM20 TM21 TM22 TM23Maximum sensitivitytemperature rangeF 0 to 300 200 to 600 150 to 450 0 to 300 200 to 600 0 to 300 200 to 600Maximum recommendedtemperatureF 900 900 900 900 900 900 500Flexivity 3 10650 to 200F 15.0 6
34、5.5 % 11.9 6 7 % 14.4 6 7 % 13.8 6 5 % 10.7 6 7 % 10.2 6 5 % 18.3 6 5%100 to 300F 14.6 6 5.5 % 11.9 6 7 % 14.1 6 7 % 13.5 6 5 % 10.9 6 7 % 10.2 6 5 % 18.66 5%Heat treatment F 700 700 700 700 700 700 500Electrical resistivity at Vcmil/ft 400 6 5.5 % 420 6 4 % 456 6 5 % 479 6 4 % 418 6 4% 926 6 % 565
35、6 4%75F Vmil2/ft 314 6 5.5 % 330 6 4 % 358 6 5 % 376 6 4 % 328 6 4% 726 6 % 444 6 4%Modulus of elasticity psi 3 10625 25 25 25 25 26 20Density lb/in.30.29 0.29 0.29 0.29 0.29 0.31 0.28TM24 TM25 TM26 TM27 TM28 TM29 TM30Maximum sensitivitytemperature rangeF 0 to 300 0 to 300 0 to 300 0 to 300 0 to 300
36、 0 to 300 200 to 600Maximum recommendedtemperatureF 500 500 500 500 500 1000 1000Flexivity 3 10650 to 200F 13.1 6 5 % 14.0 6 5 % 14.7 6 5 % 14.7 6 5 % 14.8 6 5 % 15.8 6 6% 11.86 6%100 to 300F 12.9 6 5 % 13.6 6 5 % 14.2 6 5 % 14. 46 5 % 14.6 6 5 % 15.6 6 6 % 12.2 6 6%Heat treatment F 500 500 500 500
37、500 700 700Electrical resistivity at Vcmil/ft 20 6 10 % 30 6 7.5 % 50 6 7.5 % 70 6 7.5 % 90 6 5 % 477 6 4 % 415 6 4%75F Vmil2/ft 15.7 6 10 % 23.6 6 7.5 % 39.3 6 7.5 % 556 7.5 % 70.6 6 5 % 375 6 4 % 326 6 4%Modulus of elasticity psi 3 10624 24 23 23 22 25 25Density lb/in.30.29 0.29 0.29 0.29 0.29 0.2
38、9 0.29TM31 TM32 TM33 TM34 TM35 TM36Maximum sensitivitytemperature rangeF 0 to 300 0 to 300 0 to 300 0 to 300 0 to 300 0 to 300Maximum recommendedtemperatureF 500 500 500 500 900 900Flexivity 3 10650 to 200F 18.9 6 5 % 21.7 6 5 % 20.8 6 5 % 21.4 6 5 % 15.2 6 7 % 13.7 6 5%100 to 300F 18.7 6 5 % 20.8 6
39、 5 % 20.1 6 5 % 20.3 6 5 % 14.9 6 7 % 13.3 6 5%Heat treatment F 500 500 500 500 700 700Electrical resistivity at Vcmil/ft 30 6 10 % 150 6 5% 506 10 % 70 6 8 % 482 6 4 % 500 6 4%75F Vmil2/ft 23.6 6 10 % 117.8 6 5 % 39.3 6 10 % 55 378.6 6 4 % 392.7 6 4%Modulus of elasticity psi 3 10619 19 19 19 25 24D
40、ensity lb/in.30.30 0.30 0.29 0.29 0.29 0.29B388 06 (2012)4TABLE 3 Properties of Thermostat Metals (SI Units)NOTE 1TM6 and TM7 are no longer manufactured due to availability, difficulty to produce, commercial interest, or combinations thereof.Properties UnitsASTM TypeTM1 TM2 TM3 TM4 TM5 TM8 TM9Maximu
41、m sensitivitytemperature rangeC 18 to 149 18 to 204 93 to 316 121 to 371 149 to 454 18 to 204 18 to 149Maximum recommendedtemperatureC 538 260 538 538 538 260 482Flexivity 3 10610 to 93C 27.0 6 5 % 39.1 6 5 % 18.7 6 6 % 15.5 6 6% 11.56 6 % 28.1 6 8 % 20.7 6 10 %38 to 149C 26.3 6 5 % 38.0 6 5 % 19.1
42、6 6 % 16.2 6 6% 11.96 6 % 28.1 6 8 % 20.2 6 10 %Heat treatment C 371 260 371 371 371 260 371Electrical resistivityat 25CVm 0.790 6 4 % 1.12 6 5 % 0.732 6 4 % 0.665 6 4 % 0.573 6 5 % 1.41 6 5 % 0.166 6 5.5 %Modulus of elasticity MPa 172 000 141 000 172 000 172 000 176 000 134 000 179 000Density kg/m3
43、8030 7750 8030 8030 8030 7470 8580TM10 TM11 TM12 TM13 TM14 TM15 TM16Maximum sensitivitytemperature rangeC 18 to 149 18 to 149 18 to 149 18 to 149 18 to 149 18 to 149 18 to 149Maximum recommendedtemperatureC 482 482 482 482 482 482 482Flexivity 3 10610 to 93C 23.6 6 6 % 23.8 6 6 % 24.7 6 5.5 % 25.2 6
44、 5.5 % 26.5 6 5.5 % 26.6 6 5.5 % 26.3 6 5.5 %38 to 149C 22.9 6 6 % 23.9 6 6 % 24.7 6 5.5 % 25.2 6 5.5 % 25.7 6 5.5 % 25.9 6 5.5 % 26.1 6 5.5 %Heat treatment C 371 371 371 371 371 371 371Electrical resistivityat 25CVm 0.208 6 5.5 % 0.249 65.5 % 0.291 6 5.5 % 0.332 65.5 % 0.416 6 5.5 % 0.499 6 5.5 % 0
45、.582 6 5.5 %Modulus of elasticity MPa 179 000 179 000 176 000 176 000 176 000 172 000 172 000Density kg/m38300 8300 8300 8300 8300 8300 8030TM17 TM18 TM19 TM20 TM21 TM22 TM23Maximum sensitivitytemperature rangeC 18 to 149 93 to 316 65 to 232 18 to 149 93 to 316 18 to 149 93 to 316Maximum recommended
46、temperatureC 482 482 482 482 482 482 260Flexivity 3 10610 to 93C 27.0 6 5.5 % 21.4 6 7 % 25.9 6 7 % 24.86 5 % 19.3 6 7 % 18.46 5 % 32.9 6 5%38 to 149C 26.3 6 5.5 % 21.4 6 7 % 25.4 6 7 % 24.3 6 5 % 19.6 6 7 % 18.4 6 5 % 33.5 6 5%Heat treatment C 371 371 371 371 371 371 260Electrical resistivityat 25C
47、Vm 0.665 6 5.5 % 0.698 6 4 % 0.758 6 5 % 0.796 6 4 % 0.694 6 4 % 0.153 6 6 % 0.939 6 4%Modulus of elasticity MPa 172 000 172 000 172 000 172 000 172 000 179 000 138 000Density kg/m38030 8030 8030 8030 8030 8580 7750TM24 TM25 TM26 TM27 TM28 TM29 TM30Maximum sensitivitytemperature rangeC 18 to 149 18
48、to 149 18 to 149 18 to 149 18 to 149 18 to 149 93 to 316Maximum recommendedtemperatureC 260 260 260 260 260 538 538Flexivity 3 10610 to 93C 23.0 6 5 % 25.0 6 5 % 26.3 6 5 % 26.5 6 5 % 26.6 6 5 % 28.44 6 6 % 21.24 6 6%38 to 149C 22.7 6 5 % 24.3 6 5 % 25.7 6 5 % 26.7 6 5 % 26.3 6 5 % 28.1 6 6 % 22.0 6
49、 6%Heat treatment C 260 260 260 260 260 371 371Electrical resistivityat 25CVm .0333 6 10 % .050 6 7.5 % .083 6 7.5 % .116 6 7.5 % .150 6 5 % .793 6 4 % .690 6 4%Modulus of elasticity MPa 165 000 165 000 158 000 158 000 151 000 172 000 172 000Density kg/m38030 8030 8030 8030 8030 8030 8030TM31 TM32 TM33 TM34 TM35 TM36Maximum sensitivitytemperature rangeC 18 to 149 18 to 149 18 to 149 18 to 149 . .Maximum recommendedtemperatureC 260 260 26
