1、UDC 669.018.54 : 621.315.551 : 621.365.41 : 620.1 DEUTSCHE NORM October 198, I I Heating conductor alloys Technical delivery conditions for round and flat wire oiN 17 470 Heizleiterlegierungen; technische Lieferbedingungen fr Rund- und Flachdrhte Supersedes July 1963 edition and DIN 59 470, July 196
2、3 edition In keeping with current practice in standards published by the International Organization for Standardization (ISOI, a comma has been used throughout as the decimal marker. 1 Field of application This standard applies to the nickel-chrome, nickel-chrome- iron, iron-nickel-chrome and iron-c
3、hrome-aluminium alloys which are normally used for the manufacture of heating conductors by virtue of their high electrical resistance and of their resistance to scaling. It gives specifications for round wire from 0,lO to 6,5 mm diameter, and for flat wire from 0.03 to 0.50 mm thickness and 0,3 to
4、3,O mm width. Note. Some of these alloys are also used as electric resistance alloys. DIN 17 471 applies to these. 2 Designation 2.1 Standard designation 2.1.1 Material A heating conductor alloy identified by material desig- nation NiCr 80 20 and material number 2.4869 shall be designated : or Alloy
5、 DIN 17 470 - 2.4869 2.1.2 Round and flat wire The standard designation shall give in the following order : - the term (round wire or flat wire); - the number of this DIN Standard; - the material designation or material number; - the nominal diameter of round wire, in mm, or Alloy DIN 17 470 - NiCr
6、80 20 nominal thickness and nominal width of flat wire, in mm. 2.1.3 Examples of standard designation Example 1 : round wire A round wire made from the alloy identified by material designation NiCr 80 20 and material number 2.4869, of 3,O mm nominal diameter shall be designated: Round wire DIN 17 47
7、0 - NiCr 80 20 - 3,O or Round wire DI N 17 470 - 2.4869 - 3,O Example 2: flat wire A flat wire made from the alloy identified by material designation CrAl20 5 and material number 1.4767, with a nominal thickness of 0.30 mm and a nominal width of 3 mm shall be designated: Flat wire DIN 17 470 - CrAl
8、20 5 - 0,30 X 3 or Flat wire DIN 17 470 - 1.4767 -OJO X 3 2.2 Designation to be used on ordering 2.2.1 For the purpose of processing a purchase order, the standard designation of round and flat wires shall be supplemented by the following details: - quantity ordered (indication to precede the standa
9、rd designation); - internal diameter of coil or length and surface finish (indications to follow the standard designation). 2.2.2 Examples of order designation Example 1 : Order designation of 100 kg of round wire of 3,O mm nominal diameter, made from alloy NiCr 80 20 (material number 2.48691, with
10、“oxidized“ surface finish, supplied in coils with 500 mm internal diameter: 100kg round wire DIN 1747O-NiCr8020-.3.0 oxidized, in coils with 500 rnm internal diameter oxidized, in coils with 500 mm internal diameter or 100 kg round wire DIN 17 470 - 2.4869 - 3,O Example 2: Order designation of 500 k
11、g of flat wire of 0,30 mm nominal thickness and 3 mm nominal width, made from alloy CrAl 20 5 (material number 1.4767) with “bright“ surface finish, wound onto DIN 46 399 - 125 spool: 500 kg flat wire DIN 17 470 - CrAl20 5 - 0.30 X 3 bright, on DIN 46 399 - 125 spool or 500 kg flat wire DIN 17 470 -
12、 1.4767 - 0,30 X 3 bright, on DIN 46 399 - 125 spool Continued on pages 2 to 11 Beuth Verlag GmbH, Berlin 30, has exclusive sale rights for German Standards (DIN-Normen) 06. 85 DIN 17 470 Engl. Price group 8 Sales No. O1 08 Page 2 DIN 17 470 3 Dimensions, permissible dimensional 3.1 The nominal dime
13、nsions and the nominal masses determined therefrom on the basis of thedensity specified in table 7 are listed in table 1 for round wire and in table 2 for flat wire. 3.2 Inthecaseofflatwire, theactualvalueof thewidth shall not deviate from the nominal value by more than I5%. deviations and masses 4
14、Chemical composition Table 3 lists guideline values relating to the chemical composition of the heating conductor alloys (see final paragraph of Explanatory notes). 5 Condition of wire and method of supply The wire shall be supplied in the soft annealed condition and, depending on the order, provide
15、d with one of the following surface finishes: - bright, or - oxidized. The wire shall be supplied in one of the following forms: - wound onto spools complying with DIN 46 399 - in coil, or - in containers complying with DIN 46 396 Part 1 or Part 2. Part 1 or Part 2, or 6 Properties 6.1 Electrical re
16、sistance 6.1.1 Values of the specific electrical resistance of the heating conductor alloys to be complied with are given in table 4. 6.1.2 Nominal values of the electrical resistance per metre of wire to be complied with are given in table 5 for round wire and in table 6 for flat wire. These values
17、 have been calculated on the basis of the specific electrical resistance values (see table 4) applicable to the state of equilibrium (see table 4, footnote 11.: 6.1.3 In the state of equilibrium (see table 4, foot- note 1 ) the permissible deviation of the electrical resistance per metre at 2OoC fro
18、m the nominal values specified in table 5 and table 6 shall not exceed I 5 %. 6.1.4 Within one and the same continuous length of wire, the electrical resistance per metre at 20 OC shall not deviate by more than I2 % from the measured value indicated on the adhesive label or on the tie-on tag describ
19、ed in clause 10. 6.2 Other physical properties Guideline values relating to other physical properties are listed in table 7. 6.3 Strength properties at room temperature The values given in table 8 are applicable to the strength properties of wire at 2OoC in the soft annealed condition. 6.4 Creep pro
20、perties The guideline values given in table 9 are applicable to the 1 % - 1000 h creep strain limit (RPlllooo) of wire in the soft annealed condition. 6.5 Corrosion behaviour Table 10 gives a synopsis of the corrosion behaviour of the alloys in the soft annealed condition. 6.6 Behaviour in the wrapp
21、ing test In the case of wires with diameters up to 1 mm, the pitch of the coil turns of the helical springs wound as described in subclause 9.3 shall be uniform after the coil has been pulled apart and relieved of the tensile load. 7 Recommendations relating to processing Products made from heating
22、conductor alloys can be jointed to one another by various processes, e.g. by brazing or welding. The choice of process and the pro- cessing conditions depend on the requirements imposed on the joints. Because these requirements vary widely, no universally valid recommendations can be made. 8 Recomme
23、ndations relating to applications Table 3 gives recommendations relating to preferred applications, and table 11 gives guideline values relating to the upper temperature of utilization in air and also data on embrittlement phenomena (see also table IO). 9 Testing 9.1 Testing the electrical resistanc
24、e 9.1.1 The manufacturer shall test one test piece per coil, spool or container in respect of its electrical resistance at 20 C. 9.1.2 The test piece should preferably be 1 m long. 9.1.3 Normally the test pieces shall be tested in the soft annealed condition, but in arbitration cases they shall be t
25、ested in the equilibrium state. 9.1.4 Any measuring instrument capable of measuring the electrical resistance to within I 1 % may be used for the test. 9.1.5 For the purpose of calculating the specific electrical resistance, the measured resistance per metre shall be multiplied by the actual cross s
26、ection (not by the nominal cross section) of the wire. 9.2 Tensile test 9.2.1 Should verification (in the form of a certificate) of the minimum values for tensile strength and elonga- tion after fracture specified in table 8, at room tempera- ture in the soft annealed as delivered condition, be desi
27、red, then this shall be agreed at the time of ordering, together with details on the type of document required (see DIN 50 049). If an inspection certificate has to be issued, the scope of testing shall also be agreed. 9.2.2 The tensile test shall be carried out as specified in DIN 51 210 Part 1. DI
28、N 17470 Page3 9.3 Wrapping test In arbitration cases, the wrapping test intended to verify that the requirements given in subclause 6.6 have been fulfilled, shall be carried out as specified DIN 51 215. as follows. A wire about 250 mm in length and about 10 X d in diameter (d being the nominal diame
29、ter of the wire) shall be wound in a helix around a mandrel so that the adjacent wraps of the coil are in contact. After the mandrel has been removed, the coil shall be pulled apart to an extent which ensures that its length, after it has been relieved of the tensile load, is equal to at least twice
30、 but not more than four times the previous coil length. 10 Marking The spools, coils or containers shall be identified by means of adhesive labels or tie-on tags. These labels or tags shall show the material designation of the alloy, the electrical resistance per metre, determined at 20 OC for the s
31、oft annealed condition (as described in sub- clause 9.1 ), and the nominal dimensions of the wire. Page4 DIN 17470 5,5 6,O 6,5 23,76 172,8 197,2 192,4 194, 187,7 185,3 168,7 171,l 173,4 28.27 188,5 234.7 229,O 231.8 223,4 220.5 200,7 203,6 206,4 33,18 204,2 275,4 268.8 272,l 262,l 258.8 235.6 238,9
32、242,2 DIN 17 470 Page 5 Table 2. Nominal dimensions and nominal masses of flat wire - Nom. inal width mm - O,3 - Nom- inal ness thick- mm 0,03 - Nom- inal cross iection mm2 0,009 - Nominal mass, in kg per 1000 m, for alloy Nominal surface area per metre of wire length cm2 6,6 NICr 80 2 2.4860 NiCr 7
33、0 3 2.4658 CrAI 20 5 i .4n7 NiCr 60 1: 2.4867 NiCr 30 2 1.4860 CrNi 25 2( 1.4843 CrAI 14 1 1.4725 CrAI 25 1.4765 0,064 0,075 0,073 0,074 0,071 0,070 0,065 0,066 0,133 0,016 0,025 0,050 0,060 0,075 0,117 O, 1 83 0,365 0,438 0,548 O, 130 0,203 0,405 0,486 O, 608 0,131 0,205 0,410 0,492 0,615 0,126 0,1
34、97 0,395 0,474 0,593 O, 125 O, 195 0,390 0,468 0,585 0,114 0,178 0,355 0,426 0,533 0,115 0,180 0,360 0,432 0,540 0,05 Oll o 0,12 0,15 11,o 12,o 12,4 13,O 0,208 0,415 0,498 0,623 0,299 0,498 0,598 0,747 0,263 0,438 0,526 0,657 0,358 0,06 Oll o Oll 2 0,15 0,07 0,08 0,l o Oll 2 Oll 5 0,20 0,OQ 0,036 0,
35、060 0,072 0,090 0,049 13,2 14,O 14,4 15,O 15,4 0,292 0,486 0,583 0,729 0,397 0,295 0,492 0,590 0,738 0,402 0,284 0,474 0,569 0.71 1 0,387 0,281 0,468 0,562 0,702 0,382 0,256 0,426 0.51 1 0,639 0,348 0,259 0,432 0,518 0,648 0,353 0,407 0,064 0,080 0,096 o, 120 O, 160 0,081 17,6 18,O 18,4 19,o 20,o 19
36、,8 0,531 0,664 0,797 0,996 1,33 0,672 0,830 0,996 1,25 1.66 0,996 1,20 1.49 1,99 1,25 1,49 1.87 2.49 0,518 0,648 0,778 0,972 1 ,a 0,656 0,506 0,632 0,758 0,948 1,26 0.640 0,790 0,948 1,19 1,58 0,499 0,624 0,749 0,936 1,25 0,632 0,467 0,584 0,701 0,876 1,17 0,591 0.525 0,656 0,787 0,984 1,31 0,644 0,
37、454 0,568 0,682 0,852 1.14 0,575 0,461 0,576 0,691 0,864 1,15 0,583 0,l o 0,12 Oll 5 0,20 o, 1 O0 o, 120 O, 1 50 0,200 22,o 22,4 23,O 24,O 0,81 O 0,972 1,22 1,62 0,820 0,984 1,23 1,64 0,780 0,936 1,17 1,56 0,710 0,852 1 ,O7 1,42 0,720 0,864 1 ,O8 1.44 0,730 0,876 1,10 1,46 0,972 1,17 1,46 1,94 0,984
38、 1.18 1,48 1,97 0,948 1.14 1,42 1,90 0,936 1,12 1,40 1 ,87 0,852 1 ,o2 1.28 1,70 0,864 1 ,O4 1,30 1,73 0,876 1 ,O5 1,31 1,75 o, 120 0,144 O, 180 0,240 O, 150 O, 180 0,225 0,300 26,O 26,4 27,O 28,O 32,O 32,4 33,O 34.0 Oll o 0,12 0,15 0,20 Oll o Oll 2 0,15 0,20 1,22 1,46 1,82 2,43 1,23 1,48 1,85 2,46
39、1,19 1.42 1.78 2,37 1,17 1,40 1,76 2,34 1 ,O7 1.28 1.60 2,13 1 ,O8 1,30 1.62 2,16 1,10 1,31 1,64 2,19 1,49 1,79 2,24 2,99 0,180 0,216 0,270 0,360 0,200 0,240 0,300 0,400 0,600 3830 38,4 39,O 40,O 42,O 42,4 43,O 44,O 46,O 1,46 1,75 2,19 2,92 1,62 1,94 2,43 3.24 4,86 1,40 1,68 2,ll 2,81 1,56 1,87 2,34
40、 3,12 4,6a 1,30 1,56 1.94 2.59 1,44 1,73 2.1 6 2.88 4.32 0,lO Oll 2 Oll 5 0,20 0,l o 0,12 Oll 5 0,20 0930 1,48 1,77 2,21 2.95 1,64 1,97 2,46 3,28 4.92 1,42 1,71 2,13 2.84 1,58 1,90 2,37 3.16 4.74 1.28 1,53 1,92 2.56 1,42 1,70 2,13 2.84 4.26 1,31 1,58 1,97 2,63 1,46 1,75 2,19 2,92 4,38 1.66 1,99 2,49
41、 1,33 4,98 0,375 0,500 0,750 1,250 0,450 0,600 0,900 1,500 - 53, O =,o 56,O 60,O 63,O 6490 66,O 70,O 304 4,05 6,08 10,l 3,65 4,86 7,29 12,2 2,96 3,95 5,93 9.88 3.55 4,74 7,ll 11,9 2,93 3,90 5,85 9,75 331 4m 7,02 11,7 0,15 0,20 0930 0,50 0,15 0,20 0,30 0,50 - 3,ll 4,15 6,23 10.4 3.74 4,98 7,47 12,5 3
42、,08 4,lO 1,15 10,3 3.69 4,92 7,38 12,3 266 3,55 5.33 8.88 3.20 4,26 6,39 10,7 - 2.70 3-60 5.40 9.00 3,24 4,32 6,48 10.8 2,74 3,65 5,48 9,13 3,29 438 6,57 11,0 Page6 DIN 17 470 Material designation Table 3. Chemical compositi Material Material 20 I 100 I 200 I 300 400 1 500 600 I 700 I 800 I 900 1000
43、 I 1100 1200 Permissible deviation I NiCr 80 20) I 2.4869) NiCr 80 20 NiCr 70 30 NiCr 60 15 NiCr3020 CrNi 25 20 CrAI 25 5 CrAI 20 5 CrAI 14 4 I NiCr 70 301) I 2.4658) * 5% + 6% - -+ 7 Oh k 8% 1,12 1,13 1,13 1,14 1,15 (1 ,W2) (1,091 *) (1,1 O) 2, (1,12) 2, (1,14) 2, 1.19 1,20 1.22 1,23 1,24 (1.1 (1,1
44、71 2, (1,18) 2, (1 ,W2) (1 ,22)2) 1,13 1.14 1,16 1.18 1,20 (1,1 Il2) (1,12)*) (1,14)2) (1,16)*) (1,18)2) 1,16 1,151 1,14 1,14 1,14 1,15 1,16 1,17 1,25 1,24 1,24 1,24 1,24 1,24 1,25 1,25 1,22 1.21 1,21 1.22 1,23 1.24 1.26 1,28 1,04 1,07 1,11 1.14 1,17 1,20 1,22 1,24 1,26 1.28 1,30 1,32 - 0,95 0,99 1,
45、03 1.07 1,11 1,15 1.18 1.20 1.22 1.24 1,26 1.28 - 1,44 1,44 1,44 1,44 1,45 1,45 1,46 1,47 1,48 1,49 1,49 1,49 1,49 1,37 1,37 1.38 1.38 1,39 1,41 1.42 1,43 1.44 1,44 1.45 1,45 1,45 1,25 1,26 1,27 1,28 1,30 1,32 1,34 1,36 1,39 1,41 1,42 1,44 - NiCr 60 15 l) NiCr 30 20 1.4860 CrNi 25 20 1.4843 CrAI 25
46、5 1.4765 CrAI 20 5 1.4767 CrAI 14 4 1.4725 2.4867 I) m, properties, use Notes I I I I I der I l I I load resistors ) See DIN 17 742 for further details. *) A moderate degree of ferromagnetism is possible in the case of NiCr 60 15 alloy. Table 4. Nominal values and permissible deviations of specific
47、electrical resistance I Specific electrical resistancel), in fi mm2/m, at “C DIN 17 470 Page 7 Nominal cross Table 5. Nominal values of electrical resistance per metre of round wire Nominal surface area per Nominal values of electrical resistance per metre, in Q, at 20 OC for alloy mrn2 length cm2 N
48、om- inal diam- eter rnm 14,7 section 1 13,4 20,4 19,4 17,7 ) 10,8 9-9 15.0 14.2 13,O 828 7,56 1 1,46 10,90 9,95 654 5,97 9,05 8,61 7,86 1 ,o9 0,920 0,784 0.676 1 ,o0 1,152 1,44 1.32 0,840 1,273 1,211 1,105 0,716 1,085 1,032 0,942 0,617 0.935 0,890 0.81 2 NiCr 80 20 NiCr 70 30 NiCr 60 15 NICr 30 20 C
49、rNi 25 20 CrAl 25 5 CrAl 20 5 CrAI 14 4 2.4869 1 2.4658 1 2.4867 I 1.4860 1 1.4843 1 1.4765 I 1.4767 I 1.4725 142,6 0,13 Q 0,14 I I 132,4 I 121,o 1 17,9 99.0 84,4 72,8 105.2 63,4 55.7 44.0 35.7 293 56,2 44,4 0,04909 1 7,85 1 22,8 0.40 0,08042 10,05 0,09621 1 1 ,O0 O, 126 f)I 9,47 1 7.10 0,159 1 14.1 1 7.04 0,196 I 15.7 I 5,70 E 0,238 I 17.3 I 4.71 E 2,94 I 4.38 I 4.00 I 6.06 I 577 I 5-26 I I 0.60 0,283 1 16.8 1 3,96 3,68 1 3.36 1 509 1 4,85 I 4,42 3,13 I 2,86 1 4.34 I 4,13 I 3.77 1.4 0,332 1 20.4 I 3,38 0,385 I 22.0 I 2.91 0,442 1 23.6 1 2.54 p 1.19 2,35 I 2,15 1 3,26 1 3,lO
