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1、J I S G*3522 91 4933b08 050L23L b JIS UDC 669.1 4.01 8.298:669.14-426669.14-124 JAPANESE INDUSTRIAL STANDARD Piano wires Translated and Published by Japanese Standards Association Printed in Japan 6s JIS G*3522 71 m 4933608 0503232 8 m In the event of any doubt arising, the original Standard in Japa
2、nese is to be final authority. -,-,- J I S 683522 93 4933608 0503233 T UDC 669.14.018.298:669.14-426: 669.14-124 f$ JAPANESE INDUSTRIAL STANDARD J r s UJ Piano wires G 3522-1991 1. ScoDe This Japanese Industrial Standard specifies the piano wires (hereafter referred to as the “wireslf). Remarks 1. A
3、pplicable standards to this Standard shall be given as follow s. JIS G 0558 Methods of Measuring Decarburized Depth for Steel JIS G 3502 Piano Wire Rods 2. JIS K 1310 Hydrochloric Acid JIS Z 2241 Method of Tensile Test for Metallic Materials Corresponding International Standards to this Standard sha
4、ll be given as follows. IS0 8458-1 : 1989 Steel wire for mechanical springs (Part i) IS0 8458-2 : 1989 Steel wire for mechanical springs (Part 2) 2. Classes, symbols and applied wire diameters Wires shall be classified into three and their symbols and applied wire diameters shall be as shown in Tabl
5、e 1. Reference Standards : JIS B 2704-Design of Helical Compression and Extension Springs JIS B 2709-Design of Helical Torsion Springs -,-,- JIS G*3522 91 E 4933608 0503234 3 E 2 G 3522-1991 Table 1. Classes, symbols and applied wire diameters Class I Symbol I Applied wire diameter I Application 0.0
6、8 mm or over up to and incl. mm for spring receiv- 0.08 mm or over up to and incl. mm Piano wire, class A SWP-A Piano wire, class B SWP-B ing principally dynamic load for valve spring ing thereto Piano wire, class V SWP-V or spring accord- *O0 mm 0 over UP to and incl. 6.00 mm 3. Mechanical properti
7、es 3.1 Tensile strength The tensile strength of the wires shall be as given in Table 2 when tested in accordance with 8.2. -,-,- J I S G*3522 73 W 4733608 0503235 3 I Reference diameter of wire (1) mm 0.08 0.09 0.10 0.12 0.14 0.16 0.18 0.20 0.23 0.26 0.29 0.32 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70
8、 0.80 0.90 1.00 1.20 1.40 1.60 1.80 2.00 2.30 2.60 2.90 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 8.00 9.00 10.0 3 G 3522-1991 Table 2. Tensile strength SWP-A 2890 to 3190 2840 to 3140 2790 to 3090 2750 to 3040 2700 to 2990 2650 to 2940 2600 to 2890 2600 to 2840 2550 to 2790 2500 to 2750 2450 to
9、2700 2400 to 2650 2400 to 2650 2350 to 2600 2300 to 2550 2300 to 2550 2260 to 2500 2210 to 2450 2210 to 2450 2160 to 2400 2110 to 2350 2110 to 2300 2060 to 2260 2010 to 2210 1960 to 2160 1910 to 2110 1860 to 2060 1810 to 2010 1770 to 1960 1770 to 1960 1720 to 1910 1670 to 1860 1670 to 1810 1670 to 1
10、810 1620 to 1770 1620 to 1770 1570 to 1710 1520 to 1670 1520 to 1670 1470 to 1620 1470 to 1620 1420 to 1570 1420 to 1570 Tensile strength N h m 2 SWP-B 3190 to 3480 3140 to 3430 3090 to 3380 3040 to 3330 2990 to 3290 2940 to 3240 2890 to 3190 2840 to 3090 2790 to 3040 2750 to 2990 2700 to 2940 2650
11、to 2890 2650 to 2890 2600 to 2840 2550 to 2790 2550 to 2790 2500 to 2750 2450 to 2700 2450 t o 2700 2400 to 2650 2350 to 2600 2300 to 2500 2260 to 2450 2210 to 2400 2160 to 2350 2110 to 2300 2060 to 2260 2010 to 2210 1960 to 2160 1960 to 2160 1910 to 2110 1860 to 2060 1810 to 1960 1810 to 1960 1770
12、to 1910 1770 to 1910 1710 to 1860 1670 to 1810 1670 to 1810 1620 to 1770 - - - SdP-V - - - - - - - - - - - - - - - - - - - - d - 2010 t o 2210 1960 t o 2160 1910 to 2110 1860 to 2060 1810 t o -2010 1770 to 1910 1720 t o 1860 1720 t o 1860 1720 to 1860 1670 to 1810 1670 to 1810 1670 to 1810 1620 t o
13、.1770 1620 to 1770 1570 to 1720 1520 t o 1670 - - - - - Note (1) Reference diameter of wires shall be in accordance with 4.1. Remarks: For the wire of intermediate diameter, the value in this table for the nearest larger size than that shall be applied. -,-,- J I S GM3522 91 4933608 050123b 5 = 4 G
14、3522-1991 3.2 Coiling The coiling of wires shall be tested in accordance with 8.3 on the wires of less than 0.70 mm in wire diameter, and neither harmful flaw nor breakage shall be generated on the surfaces of the wires. 3.3 Twisting characteristic Twisting characteristic of wires shall be tested fo
15、r the wires whose diameter are 0.70 mm or over up to and including 6.00 mm in accordance with 8.4 and the number of twists shall be shown in Table 3. In that case, the fracture shall be normal to the axis and shall be free from flaws, cracks, etc. The condition of twisting shall be uniform over all
16、the length and the Further, it shall not be wires shall be free from flaws and local twisting. remarkably spiral. Table 3. Number of twists Symbol of class SWP-A SWP-B or Wire diameter Number of twists 25 times or more 0.70 mm or over up to and incl. 2.00 mm in wire diameter 20 times or more Over 2.
17、00 mm up to and incl. 3.50 mm in wire diameter I 15 times or more Over 3.50 mm up to and incl. 6.00 mm in wire diameter 25 times or more 1.00 mm or over up to and incl.-6:00 mm in wire diameter 3.4 Bend The bend test shall be applied in accordance with 8.5 to the wire over 6.00 mm in diameter, and s
18、hall be free from detrimental flaws on its surface and shall also withstand breaking. 4. Wire diameter and tolerances 4.1 Reference diameter of wires The reference diameters of wires shall be as given in Table 4. Table 4. Reference diameter of wires Unit: mm 0.08 0.09 0.10 0.12 0.14 0.16 0.18 0.20 0
19、.23 0.26 0.29 0.32 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.80 0;90 1.00 1.20 1.40 1.60 1.80 2.00 2.30 2.60 2.90 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 8.00 9.00 10.0 -,-,- - 1 J I S G*3522 71 I 4733b08 0503237 7 5 G 3522-1991 4.2 Tolerances and permissible deviations on wire diameters of wir
20、es shall be tested in accordance with 8.6 and their toleran permissible deviations on wire diameters (2) shall be as given in Diameters es and Table 5. Note (2) The permissible deviation on wire diameter means the difference between the maximum and minimum values of diameter on the same section of w
21、ire. Table 5 . Tolerances and permissible deviations on wire diameters Unit: mm Wire diameter Permissible devia- tion on diarheter Tolerance 0.08 or over up to and incl. 0.20 2 0.004 0.004 max. Over 0.20 up to and incl. 0.50 I 0.008 0.008 max. Over 0.50 up to and incl. 1.00 2 0,010 0.010 max. Over 1
22、.00 up to and incl. 2.00 I 0.015 0.015 max. Over 2.00 up to and incl. 3.20 2 0.020 0.020 max. I !. Over 3.20 up to and incl. 5.50 1 I 0.030 I . 0.030 max. Over 5.50 up to and incl. 8.50 I 2 0.040 I 0.040 max. Over 8.50 up to and incl. 10.0 I 0.050 0.050 max. I 5. Surface conditions 5.1 Appearance Th
23、e surface of wires shall be smooth and free from d e t r i m e n v s u c h as flaws and others. 5.2 Flaw The flaw detection test shall be applied in accordance with 8.7 to t h e i r e 1.00 mm and over in diameter, and the permissible limit of depth of flaws shall be as given in Table 6 . e ? -,-,- J
24、IS Gr3.522 71 m 4733608 0503238 9 E 6 G 3522-1991 Table 6. Permissible depth of flaw Unit: mm Diameter of wire 1.00 or over up to and incl. 2.00 Over 2.00 -up to and incl. 3.00 Over 3.00 up to and incl. 4.00 Over 4.00 up to and incl. 5.00 Over 5.00 up to and incl. 6.00 Over 6.00 up to and incl. 8.00
25、 Over 8.00 up to and incl. 10.0 Permissible depth of flaw 0.02 max. 0.01 max. 0.03 max. 0.04 max. 0.02 max. 0.05 max. 0.03 max. 0.06 max. 10.03 max. 0.07 max. I - 0.08 max. - 5.3 Decarburized layer Wires of 0.70 mm or over in wire diameter are . tested in accordance with 8.8 for the decarburized lay
26、er of wires, and the condition for the decarburized layer shall be as given in Table 7. Table 7. Condition of decarburized layer Symbol of class Condition of decarburized layer SWP-A SWP-B or Detrimental decarburized layer shall not be observed. SWP-v Ferritic carburized layer shall not be observed.
27、 The depth of the total decarburized layer shall be 1.5 % or under of the diameter, and its maximum value shall be 0.05 mm. 6 . Material The wire rod conforming to the specification of JIS G 3502 shall be used for manufacturing the wire. rod for class V shall be 0.15 % or under; However, the copper
28、content of the wire 7. Method of manufacture i , Wires shall be cold processed after patenting treatment. -,-,- J I S G83522 93 4933608 0503239 O 8. Test 7 G 3522-1991 c 8.1 Sampling of test piece One test piece each for a tensile test, a coiling test, a twisting test, a bend test, a flaw detecting
29、test, and a decarburized layer depth measuring test shall be taken from one end of the wire. However, though the decarburized layer depth measuring test piece of class A and class B shall be taken from one end of one line of the wire representing a lot manufactured continuously under the same condit
30、ions, sampling may be further adopted as agreed upon between the parties concerned. 8.2 Tensile test The test method shall comply with JIS Z 2241, and the distance between both grips shall be approximately 100 mm for the wire less than 1.00 mm in diameter and be approximately 200 mm for that of 1.00
31、 mm and over. In case the test piece breaks at the gripping portion, the test results shall be regarded as invalid and a retest shall be made on the additional test pieces sampled again from the same wire. 8 . 3 Coiling test For a coiling test, a test piece is coiled 4 turns or over around a core of
32、 the same diameter as a wire diameter, and the presence of fracture and the condition for generation of flaws shall be examined. 8.4 Twisting test Near both ends of a test piece, it shall be gripped firmly. with a distance of 100 times the diameter of the wire, one end of a test piece shall be turne
33、d in the same direction being stretched not to bend until it fractures, then the number of twists, conditions of fractured section and twist shall be examined. When the test is made with a gripping distance other than 100 times the diameter of the wire, the number of twists shall be varied in direct
34、 proportion to the gripping distance. twisted shall be calculated according to that of 100 times diameter for the wire. In this case, the number to be 8.5 Bend test The test piece shall be bent at two places in directions different from each other through an angle of 90 around an arc with a radius o
35、f the wire diameter, and then the presence of fracture and the condition for generation of flaws shall be examined. 8.6 Measurement of wire diameters In measurement of wire diameters, the maximum diameter and minimum diameter at an arbitrary place of the same section shall be measured. 8.7 Flaw dete
36、ction test The residual stress relieved test piece of suitable length shall be immersed approximately 200 mm into a boiling solution that is of adequate concentration and composed of hydrochloric acid conforming to JIS K 1310 and water, and then the test piece shall be examined for the existence of
37、flaws after 1 % of the diameter of the wire being reduced without pitting. To determine the depth of flaw, usually, the irregular part is cut off until it disappears, then measurement is made on the depth of removed part by a micrometer, -,-,- i J I S G*3522 91 I 4733608 0501240 7 R 8. G 3522-1991 8
38、.8 Decarburized layer depth measuring test A decarburized layer depth measuring test shall be performed in accordance with JIS G 0558. The cross section of a test piece is polished, and the condition of decarburization shall be examined with a microscope of 100 to 500 magnification after etching. te
39、st does not conform to a specific value, a retest may be performed. that case, two test pieces shall be taken again and all the results shall conform to the specified requirements. 8.9 Retest In the case where the result of a tensile test or a twisting In 9, Inspection The inspection shall be as fol
40、lows. (1) Mechanical properties shall conform to the requirements specified in 3. (2) Wire diameter shall conform to the requirements specified in 4. (3) Surface condition shall conform to the requirements specified in 5. 10. Marking The wires which have passed the inspection shall be marked with th
41、e following information on each line. (1) Symbol of wire rod used in manufacture of wire (2) Symb.01 of class (3) Wire diameter (4) Manufacturers name or its abbreviation 11. Report In the case where requested by the purchaser, the manufacturer shall present the records of specified items. Japanese
42、Text Established by Minister of International Trade and Industry Date of Establishment: 1951-10-31 JIS G*3522 91 = 4933608 0503243 9 G 3522-1991 Edition 1 Date of Revision: 1991-09-01 Date of Public Notice in Official Gazette: 1991-09-13 Investigated by: Japanese Industrial Standards Committee Divisional Council on Iron and Steel Technical Committee on Wire Rods and Wire Products This English translation is published by: Japanese Standards Association 1-24, Akasaka 4, Minato-ku, Tokyo 107 Japan O JSA, 1992 Printed in Tokyo by Hohbunsha Co., Ltd, -,-,-