IS 4454( Part 1 ): 2001 Wmfh?m Indian Standard STEEL WIRE FOR MECHANICAL SPRINGS — SPECIFICATION PART 1 COLD DRAWN UNALLOYED STEEL WIRE (Third Revision ) ICS 21.160; 77.140.25 0 BIS 2001 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 March 2001 Price Group 5 While reviewing the standard in the light of experience gained during these years. the Committee decided to revise it to bring it in line with the present practices being followed by the Indian industry. assistance has been derived from the following standards: a) ISO/CD 8458-1 Steel wire for mechanical springs: Part 1General requirements (Aug 98) b) ISO/CD 8458-2 Steel wire for mechanical springs: Part 2 Patented and cold-drawn unalloyed steel wire (Aug 98) c) prEN 10270-1 Steel wire for mechanical springs: Part 1 Patented and cold-drawn unalloyed steel wire (June 96) For the purpose of deciding whether a particular requirement of this standard is complied with. This standard was first published in 1967 and subsequently revised in 1975 and 1981. shall be rounded off in accordance with IS 2:1960 ‘Rules for rounding off numerical values ( revised )‘. Other parts in the series are: Part 2 Part 4 Oil hardened and tempered steel wire Stainl?ss steel wire Examples of application for cold drawn unalloyed steel wire have been given in Annex B. and c) Dimensional tolerances have been modified. Chemical composition and tensile strength values have been modified. An informative Annex A has been given for the benefit of purchaser giving particulars to be specified by the purchaser while placing order for the spring wires covered in this standard. d) Provision of wrapping test. In order to facilitate clear survey. . This variety is further increased owing to the fact that in certain cases these springs have to exhibit considerable resistance against corrosive influences and withstand elevated temperature and that the mechanical stress is imposed on them vary considerably. This part is one of the series of Indian Standards on steel wire for mechanical springs. expressing the result of a test or analysis. test have been modified. the steels are classified into three categories. the final value. In this revision following changes have been made: a) b) Grade designation has been modified.Wrought Steel Products Sectional Committee. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. It is for these reasons that a very large variety of steels maybe employed in the manufacture of steel springs. observed or calculated. MTD 4 FOREWORD This Indian Standard ( Part 1 ) ( Third Revision ) was adopted by the Bureau of Indian Standards. after the draft finalized by the Wrought Steel Products Sectional Committee had been approved by the Metallurgical Engineering Division Council. In the preparation of this standard. The properties governing the application of steels for springs maybe considerably influenced by their chemical composition as well as the modes of mechanical treatment and heat treatment applied. torsion test and decarburization e) Coating and surface finish requirements have been modified. 3 Patented Cold-Drawn Wire — Wire drawn to size by cold deformation of a starting material that has been subjected to a thermal treatment of patenting. 1 .IS 4454( Part 1 ): 2001 Indian Standard STEEL WIRE FOR MECHANICAL SPRINGS — SPECIFICATIOh~ PART 1 COLD DRAWN UNALLOYED STEEL WIRE ( 1 SCOPE This standard ( Part 1 ) covers the requirements of cold drawn unalloyed steel wires of circular cross section for the manufacture of mechanical springs for static duty and dynamic duty applications. core-less spool and cheese are synonymous with coil.1 For the purpose of this standard. constitute provisions of this standard. 2 REFERENCES The following Indian Standards contain provisions. and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below: 1SNo. 5 GRADES The grade of spring wire used depends on the stress level and onthenatureof duty The wire diameter ranges and tensile strength grades normally available for static du~ and dynamic duty are given in Table 1. 6. that is. NOTE — This does not apply to” situations frequency high stress. All standards are subject to revision. prior to drawing.2 Cast.5 Dynamic Duty — Qualifies applications where springs are subjected to frequent or predominantly dynamic Ioadingand where small coiling mtios or severe bending radius is required. or a combination of both. one complete circle of wire. The customer should be informed of the manufacturing process. / NOTE –. of low 3. the definitions given in IS 1956 (Part 5 ) and the following shall apply. Glossary of terms relating to ironaud 1956 (Part5 ): 1976 steel : Part 5 Bright steel bar and steel wire (Jrst revision) 4905:1968 6396:1983 8910:1978 Methods for random sampling Method of measuring decarburized depth of steel (first revision) General technical delivery requirerneritu for steel and steel products 3 TERMINOLOGY 3. Method for chemical analysis of steel Mechanical testing of metals-tensile testing (second revision ) Method for simple torsion test for wire ( second revision) Method for wrapping test for metallic wire (first revision ) 4 SUPPLY OF MATERIAL General requirements relating to the supply of material shall be as laid downinIS8910.1 The processes used in making the steel and in manufacturing patented and cold drawn spring steel wire are left to the discretion of the manufacturer. 228 (in Parts ) 1608:1995 1717:1985 1755:1983 Title Third Revision) 3. if he so desires.2 The steel shall be supplied in filly killed condition. 3. NOTE — The terms spool. maybe carried out as and when required. 3. which through reference in this text.6 Ring — One turn of wire from a coil.A ring of wire does not imply any specific length of wire or diameter of wire. 3. Patenting. Pitch — The way in which a single ring of wire behaves when cut from coil.4 Static Duty — Qualifies applications where springs are subjected to static stresses or infrequent dynamic loading. Helix. the editions indicated were valid. At the time of publication. 6 MANUFACTURE 6. which has to be mutually agreed to between the purchaser and the manufacturer.030 0. where the method is not given in IS 228 or its relevant parts.1.10-0.020 Max (6) 0.20 0.20 percent.45-1.00 0. The range of manganese content is so wide to cope with various processing situations and the broad size range.05-20. SM and SH. when used individually or in combination. 7. (1) Low tensile strength Medium tensile strength High tensile strength NOTE — For specific applications. Stricter compositions may be mutually agreed between the purchaser and the manufacturer. other tensile strength requirements 7 CHEMICAL COMPOSITION 7.IS 4454( Part 1 ): 2001 Table 1 Spring Wire Grades ( Clause 5 ) Tensile Strength Static Duty (2) SL Ski SH Diameter Range mm (3) 1.50 ) Percent s P Cu Max (5) 0.2.00 0.35%Max.1 Ladle analysis of the material when carried out either by the’method specified in the relevant part of IS 228 or any other established instrumental/chemical methc@ shall be as given in Table 2. which has to be mutually agreed to between the purchaser and the manufacturer.0 1%. SH DM.25% 5 6 7 Max. other than for the purpose of finishing the heat. the procedure given in the relevant part of IS 228 shall be the referee method. V or Ti. copper content shall not exceed the limits specified in Table 2.030 0. except where agreed to. llable 2 Chemical Composition (Ck. For individual sizes.zuses7.2.12 2 3 4 Micro alloying may be allowed subject to mutual agreement between the purchaser and the manufacturer.20 0. In case of dispute. DH NOTES 1 Such a wide range of carbon is stipulated to accommodate for the whole range of sizes.oss~o Max and Cu%+Ni%+Cr%=O.00 0.30-1. p~o+f$~o=o. 7.l Grade c (1) SL. Micro alloying elements like Nb.2 Product Analysis Permissible variations in case of product analysis from the limits speciiled in Table 2 shall be as given in Table 3.00 Dynamic Duty (4) — DM DH may be agreed.l Constituent.00 Diameter Range mm (5. 2 .00 0. the carbon range is substantially more restricted. 7. P%+ S%=0. However.30-20.1.025 Max (7) 0. the total content shall not exceed 0. Nitrogen content shall not exceed 0.00-10.1 In case of product analysis. For grades SL.30 0.040% Max and Cu%+Ni%+Cr%=O.1 Elements not specified in Table 2 shall not be added to the steel.7.08-20.30-20.2.7.1.SM. Mn (4) 0. the referee method shall be as agreed to between the purchaser and the manufacturer.00 s (3) 0.10-0. 0. For grades DM and DH.30 anci7.30-1. The real figures as per size shall be more restricted. (2) 0.35-1. 010 0. Wrapping test shall be earned out in accordance with IS 1755.50 18.45 0.78 2.65 0.26 0. The tensile strength of the wire shall be as given in Table 5 and shall be calculated using the actual wire diameter. Table 4 Diameter Tolerance for Coiled Wire ( Clauses Nominal Diameter of Wire Over mm (1) Up to and Including mm (2) Tolerance ( + ) Class A Claw B Over mm (3) 0.00 11. Percent.00 10.1 Tensile Test The tensile test shall be carried out in accordance with (1) Carbon Manganese Silicon Sulphur Phosphorus 8 FREEDOM FROM DEFECTS The surface of the wire shall be smooth and as free as possible fkom defects. Class B tolerance is intended for wire grades SL and SM.17 0.030 0.025 7.100 0. seams.10 14.2 The diiTenmcebetween the maximum and minimum diameter of the wire at the same cross section shall not be more than 50 percent of the total permissible deviation specified in Table 4.080 0.004 0.005 0.1 and 9.040 0.03 0.005 wire grades SL and SM.005 0.003 0.37 0. Class B tolerance is intended for IS 1608.070 0.020 0.00 10.050 0.045 0.008 0.012 0.00 mm. and any other harmful defects. on visual examination.10 9.00 5. scale.070 0. 9.65 0.05 0.045 0.010 0.10 9.30 NOTES 1 2 Class A tolerance is intended for wire grades SH. rust. die-marks.035 0.020 3 .00 11. such as grooves.30 20. DM and DH.100 — 0.26 0.01 0.17 0.01 1.035 0. Up to and Including mm (2) 2. tears. 10 MECHANICAL PROPERTIES 10.50 18.1 Tolerance on diameter of wire shall be as specified in Table 4.78 — .050 0.09 0.090 0.05 0.45 7. scratches.80 1.003 mm (4) mm (1) 1. 9 DIMENSIONS AND TOLERANCES 9.015 0. Max (2) 0. pits.080 0. Class A tolerance is intended for wire gmdes SH.2) Constituent Permissible Variations Over and Under Specified Limit.040 0.3 Sizes and tolerance other than those specified in Table 4 maybe mutually agreed to between the purchaser and the manufacturer.00 9.78 4.05 0.006 0.00 5.80 1. The wire shall not show.02 0.030 0.025 0.IS 4454( Part 1 ) :2001 Table 3 Permissible Variations for Product Analysis ( Clause 7. DM and DH. 10.09 0. — 0.0?0 0.37 6.015 0.78 4. any sign of fracture when closely coiled for at least four turns around a mandrel of diameter equal to that of the wire.090 0.2) Nominal Diameter of Wire Tolerance ( + ) Class A Class B mm (3) (4) 0. 9. which may have a noticeable adverse effect on the application of the wire.10 14.2 Wrapping Test The wrapping test shall be applied to wires with nominal diameter less than 3. 70 Tensile Strength for Grades.08 0.18 0.50 0. 10.38 0. 10.14 0.07 0. Subject to mutual agreement between the manufacturer and the purchaser. . — — .3.20 0.00 mm.53 0. The test piece shall be clamped into the device in such manner that its longitudinal axis is aligned to the clamping heads and the test piece remains straight during the test. Table 5 Tensile Strength Requirements ( Clause 10.28 0.4 The test shall be continued until the fracture occurs. the minimum number of turns as specified in Table 6 on a gauge length equivalent to 100 x d where d is nominal diameter of the wire.65 0.63 0. mm (I) 0. the test may also be carried out for wires with nominal diameters over 6. when the prirnaryfmcture shall be perpmdicular to the axis of the wire and surface shall not split.3.12 0.IS 4454( Part 1 ) :2001 10.3 Torsion Test 10.60 0.32 0. — — — — — — — — 2370-2650 2350-2630 2330-2600 2310-2580 2290-2560 2270-2550 2250-2520 2240-2500 2220-2480 2200-2470 2180-2450 2170-2430 2140-2400 2130-2380 2120-2370 2090-2350 :) — — — — — — — — — — — — — 2660-2940 2640-2920 2610-2890 2590-2870 2570-2850 2560-2830 2530-2800 2510-2780 2490-2760 2480-2740 2460-2720 2440-2700 2410-2670 2390-2650 2380-2640 2360-2610 DH (6) 2800-3520 2800-3520 2800-3520 2800-3480 2800-3430 2800-3380 2800-3350 2800-3320 2800-3250 2800-3200 2800-3160 2800-3110 2770-3080 2720-3010 2680-2970 2660-2940 2640-2920 2610-2890 2590-2890 2570-2850 2570-2830 2570-2800 2570-2780 2570-2760 2480-2740 2460-2720 2440-2700 2410-2670 2390-2650 2380-2640 2360-2610 4 .30 0.48 0.06 0.56 0. DM (4) — — — 2780-3100 2740-3060 2710-3020 2690-3000 2660-2960 2620-2910 2570-2860 2530-2820 2500-2790 2470-2760 2420-2710 2390-2670 2370-2650 2350-2630 2330-2600 2310-2580 2290-2560 2270-2550 2250-2520 2240-2500 2240-2500 2200-2470 2180-2450 2170-2430 2140-2400 2130-2380 2120-2370 2090-2350 MPa — — — — — — — — — — — — .05 0. — — —— — — — — — — — — — — — — — — — ?) — . secondary fractures may occur and these shall be ignored.10 0.11 0.25 0.1) Nominal Diameter of Wire.22 0.3 The test piece shall withstand being twisted without failure. . During fly-back of the wire.43 0.36 0. One clamping head shall be turned at an uniform speed of rotation as possible (not exceeding one rotation per second) until the test piece fractures.2 The torsion test shall be carried out in accordan% with IS 1717.3.1 The torsion test shall be applied to wires with nominal diameter from 0:70 mm up to and including 6 mm.09 0.34 0.3.16 0. 10.00 mm and up to and including 10.40 0.45 0. 80 3.00 10.05 1.25 1.20 1.40 3.50 9.50 4.80 0. DM (4) 2070-2330 2050-2300 2030-2280 2010-2260 2000-2240 1980-2220 1960-2220 1950-2190 1920-2160 1910-2130 1900-2130 1870-2100 1850-2080 1830-2050 1810-2030 1790-2010 1770-1990 1760-1970 1740-1960 1720-1930 1700-1910 1690-1890 1670-1880 1650-1850 1630-1830 1610-1810 1590-1780 1570-1760 1550-1740 1530-1730 1510-1700 1500-1680 1480-1670 1460-1650 1440-1630 1430-1610 1400-1580 1390-1560 1380-1550 1350-1530 1330-1500 1310-1480 1290-1460 1270-1440 1260-1420 1240-1400 1220-1380 1210-1370 MPa SH (5) 2340-2580 2310-2560 2290-2530 2270-2510 2250-2490 2230-2470 2210-2450 2200-2430 2170-2400 2140-2380 2140-2370 2110-2340 2090-2310 2060-2290 2040-2260 2020-2240 2000-2220 1980-2200 1970-2180 1940-2150 1920-2130 1900-2110 1890-2100 1860-2070 1840-2040 1820-2020 1790-1990 1770-1970 1750-1950 17401930 DH (6) 2340-2580 2310-2560 2290-2530 2270-2510 2250-2490 2230-2470 2210-2450 2200-2430 2170-2400 2140-2380 2140-2370 2110-2340 2090-2310 2060-2290 2040-2260 qo20 -2240 2000-2220 1980-2200 1970-2180 1940-2150 1920-2130 1900-2110 1890-2100 1860-2070 1840-2040 1820-2020 1790-1990 1770-1970 1750-1950 1740-1930 1710-1900 1690-1880 1680-1840 1660-1830 1640-1820 1620-1800 1590-1770 1570-1750 1560-1740 1540-1710 1510-1680 1490-1660 14701630 1450 -’1610 1430-1590 1410-1570 1390-1550 1380-1530 (% — — — — — 1720-1970 1710-1950 1690-1940 1670-1910 1660-1900 1640-1890 1620-1860 1600-1840 1590-1820 1570-1800 1550-1780 1540-1760 1520-1750 1510-1730 1490-1710 1470-1690 1460-1680 1450-1660 1420-1640 1410-1620 1390-1600 1370-1580 1350-1560 1340-1540 1320-1520 1310-1500 1290-1490 1270-1470 1260-1450 1240-1430 1230-1420 1210-1390 1190-1380 1180-1370 1160-1340 1140-1320 1120-1300 1110-1280 1090-1260 10701060— — 250 230 SM (3) 2070-2330 2050-2300 2030-2280 2010-2260 2000-2240 1980-2220 1960-2220 1950-2190 1920-2160 1910-2130 1900-2130 1870-2100 i850 -2080 1830-2050 1810-2030 1790-2010 1770-1990 1760-1970 1740-1960 1720-1930 1700-1910 1690-1890 1670-1880 1650-1850 1630-1830 1610-1810 1590-1780 1570-1760 1550-1740 1530-1730 1510-1700 1500-1680 1480-1670 1460-1650 1440-1630 1430-1610 1400-1580 1390-1560 1380-1550 1350-1530 1330-1500 1310-1480 1290-1460 1270-1440 1260-1420 1240-1400 1220-1380 1210-1370 1710-1900 16901880 1680-1840 1660-1830 1640-1820 1620-1800 1590-1770 1570-1750 1560-1740 1540-1710 1510-1680 1490-1660 1470-1630 1450-1610 1430-1594 1410-1570 1390-1550 1380-1530 5 .80 1.60 3.40 1.00 Tensile Strength for Grades.80 4.10 2.00 9.60 2.50 8.00 7.IS 4454( Part 1 ) :2001 Table 5 ( Continued) Nominal Diameter of Wire.00 6.50 1.75 5.75 0.25 4.30 6.95 1.00 2.70 1.90 2.50 7.60 1.00 5.50 2.50 10.90 0.00 4.00 8.85 0.25 2.30 1.50 11.00 3.60 6. mm (1) 0.40 2.20 3.10 1.00 1.30 5. 00 3. three to three and half times the nominal diameter.70 mmwithmutualagnxznent between the manufacturer and the purchaser.00 20. mm (1) 12.3. under slight but reasonably uniform tension on a mandrel.50 mm 6 and equal to three times the wire diameter for sizes above 6.40 2. DM (4) 1180-1340 1170-1320 1160-1310 1130-1280 1110-1260 1090-1230 1070-1210 1050-1190 1030-1170 1020-1150 MPa DH (6) 1350-1500 1330-1480 1320-1470 1290-1440 1270-1410 1240-1390 1220-1360 1200-1340 1180-1320 1160-1300 SM :6 (3) 1180-1340 1170-1320 1160-1310 1130-1280 1110-1260 1090-1230 1070-1210 1050-1190 1030-1170 1020-1150 :) 1350-1500 1330-1480 1320-1470 1290-1440 1270-1410 1240-1390 1220-1360 1200-1340 1180-1320 1160-1300 — — — — . SM and SH (3) 20 18 16 14 71) 50 10.5 Coiling and Stretching Test The coiling teat may be applied to wires with nominal diameternotgreater than 0. Table 6Torsion TestRequirements ( Clause 10.3) Nominal Diameter Wire.00 12.00 mm to 6.00 18.5 Theresult oftestpiecefailedinthe gripshall be ignored and fresh test piece shall be tested.00mm when mutually agreed between the manufacturer and the purchaser.IS 4454( Part 1 ) :2001 Table 5 (Concluded) Nominal Diameter of Wire. mm Over (1) 0.50 6.08mmto 0.00 3.00 10.69 1.00 16.50 13.4 Bend Test The bend test may be applied to wires with nominal diameter greater than 3.00 14. 10.00 8. specified range may be mutually agreed to.00 8. — — — — — For DHgrade in the size range O. of Minimum Number of ‘Rvists for Grades DM and DH (4) 25 22 20 18 90 71) Up to and Including (2) 1.00 lJ For guidance only. Forintermediate values of thewire diameter.50 6. A test piece approximately 500 mm in length is closely wound. on visual examination. The wires shall not show any sign of fracture.18mm.00 SL.1020kgt7mm2 arestricted tensile strength range of300MPa within the Tensile Strength for Grades.00 17. when bent through an angle of 180° to form a U around a mandrel of diameter equal to twice the wire diameter for sizes above 3.50 mm.40 2.00 NOTES 1 2 1 MPa= 1 N/mm*= 1 MN/m2=0.00 19. 10.3.00 15. thevalues 3 given forneti larger diameter are applicable. The closed coil is then stretched so that after . 0 mm diameter and above. 11. The wires shall not be kinked and wavy.00 mm. The etching shall be fidized after a reduction in diameter of about 1 percent.8. the cast requirements may be considered as being fidfilled if the following condition is satisfied: An individual ring taken from the coil and freely hung on a hook may show an axial displacement ‘~ at the ends of the ring ( see Fig. When a ring of wire is cut fromthepackage and allowedto fall on the surface.05 mm. the wire shall lie flat and not show a spiral cast. 11 COATING AND SURFACE FINISH The spring wire maybe lime.7.025 mm of diameter.1 The coil of wire shall consist of one single length of wire originating from one heat only.2 The wire may be supplied in lime coated or borax coated or phosphate coated and/or oiled condition.3 If no spec~lc finish is specified. after whichL when examined microscopically. This displacement ‘j’ shall not exceed a value given by the following inequality: 10. 13.7 Deep Etch Test Deep etch test shall be carried out only for grades DM and DH. 11.1. A metallic coating. This test shall normally be limited to wire of 1. Welds prior to the last patenting operation are allowe~ all other welds shall be removed or. and d = Nomiml diameter of the wire in mm. The surface condition of the wire and th~ reguhu~ti of the spring pitch (and individual windings) shall be inspected with the test piece in this condition.1 Other coatings may be agreed between the manufacturer and the purchaser. zinc or zinc/ahuninium alloy if mutually agreed between the manufacturer and the purchaser. borax or phosphate coated either by dry drawing or by wet drawing.3 The weight of the coils. for a period of time equivalent to two seconds for every 0. 10.7. 13 CONDITION OF DELIVERY 13. whichever is the lowest. zinc or zinc/aluminimn alloy. properly marked. 1 ). it sets to approximately three times its original length. J?J’n FIG.6. the type of finish shall beat the manufacturer’s discretion. If the testis required by the purchaser on smaller sizes of wire. 10. 13.5 percent of the nominal diameter of the wire or 0.1 The cold test pieces shall be immersed in a solution of 50 percent of concentrated hydrochloric acid and 50 percent of water at a temperature of 75° C minimum. shall not have a radial depth greater than 1.1 By mutual agreement between the mannt%turer and the purchaser. if so agreed between the purchaser and the manufacturer. 10. where require~ shall be commonly of copper. . the seam or other surface defects shall not be greater than 1 percent of the nominal diameter of the wire. for sizes up to 5.2 The wire can additionally be ordered with an oiled surface for all surface finishes. Surface finish and mass of coating and their methods of test shall be as per the mutual agreement between the purchaser and the manufacturer.1 The wires of grades DM and DH shall show no completely decarburized layer.IS 4454( Part 1 ): 2001 releasing the stress. the radial depth of 7 12 SAMPLING Unless otherwise agreed to. this shall be agreed upon at the time of enquiry and order. as indicated by grain boundary ferrite of an amount in excess of that present in the main portion or core of the section. 1 CASTOFTHE WIRE 10. with a maximum offive minutes. where J = Axial displacement in mm.6 Cast of the Wire The wire shall be uniformly cast.8 Decarburization Test Decarburization test shall be carried out only for grades DM and DH as specified in IS 6396. These may also be supplied with metallic coating of copper. 10. 11. 10. the eye dimensions and other forms of supply shall be mutually agreed to between the purchaser and the manufacturer. Partial decarburization. D = Diameter of a free ring in mm.1 It is necessary to heat the test pieces to a temperature of about 550”C for the purpose of stress relief before carrying out this test. the method of drawing representative samples of the material and the criteria for conformity shall be as prescribed in Annex C. Also for wire forms which require severe bending. . The suitable mode of packing shall be mutually agreed to between the purchaser and the manufacturer. 8 OF COLD DRAWN UNALLOYED STEEL WIRE B-1. and mainly from static nature or slightly dynamic. c) Wire diameter.4 Grade SH is used for tension. d) Surface finish.l. e) The form and condition of delive~.IS 4454( Part 1 ): 2001 14 PACKING The packing of the material shall be done in such a way that corrosion does not attack the material during transit. b) Wire grade. compression or torsion springs or wire formswhich are subjected to medium high stresses or medium level dynamic applications. if required. b) The wire grade. i) Tests required.2 The use of the Standard Mark is governed by the provisions of the Bureau of Indian Standards Act.2 Grade SM is used for tension. ANNEX A ( Foreword) INFORMATION A-1 BASIS FOR ORDER While placing order for spring steel wires covered by this standard. B-1. 1986 and the Rules and Regulations made thereunder.1.1. B-1. compression or torsion springs. 15. g) Castor batch number.1 Each coil of wire and bundle of straightened and cut lengths shall be legibly marked with the following itiormatiom a) Name of the supplier. g) Any special requirement.1.5 Grade DH is used for tension. which are subjected to medium high tensile levels of a dynamic nature. and h) Test report. e) Weight of the coilhmile.5. There shall not be any damage during normal handling in transit. TO BE GIVEN BY THE PURCHASER c) Nominal wire diamete~ d) Surface finish and coating where relevant. 15 MARKING 15. compression or torsion springs intended formediumhigh duty mainly static or almost not dynamic. compression or torsion springs intended for stress conditions requiring high tensile levels. B-1.1 The material may also be marked with the Standard Mark. and h) Date of supply. B-1. compression or torsion springs. f) Coating. which are subjected to low static stresses. ANNEX B ( Foreword) EXAMPLES OF APPLICATION B-1 FIELD OF APPLICATION The broad fields of application for the 5 grades of spring steel wire are given for general guidance of the designers in B-1.1. the purchaser should speci~ the following: a) The desired quantity. 15.3 Grade DM is used for tension. 1 Grade SL is used for tension.1.l.l to B-1. 1. The details of conditions under which the licence for the use of the Standard Mark maybe gmnted to manufacturers or producers maybe obtained from the Bureau of Indian Standards.1. of Coils for Physical Requirements (2) 2 3 5 8 13 Permissible Number of Defective (s) (3) No. C-3.2 lksts for Chemical Requirements Unless otherwise agreed. C-4 -RIAFORCONFORMITY A lot shall be considered to have conformed to the requirements of the specification if C-3. of Coils in the Lot (1) No. shall be called a defective.2 ) No. tensile.llbetaken at mndombyusing randomnumbertablea (see IS 4905). C-3. If the number of defective found is less than or equal to the permissible number of defective specified in CO13 of Table 7. size.1 andC-3. The lot shall be considered to have conformed to the chemical requirements if all the individual test pieces tested for chemical requirements pass the test. Table 7 Scale of Sampling and Permissible Number of Defective ( Clauses C-2. C-2 SAMPLING The number of coils to be taken from a lot shall be according to CO11 and 2 of Table 7. surface condition. These samples shall be tested for all the chemical requirements.1 and C-3.1S 4454( Part 1 ) :2001 ANNEX C ( Clause 12 ) SAMPLING AND CRITERIA FOR CONFORMITY C-1 LOT In any consignment. all the coils of wire of the same grade and diameter manufactured under essentially similar conditions of manufacture shall be grouped together to constitute a lot. bend. wrapping and coating tests. namely. C-1. the lot shall be considered to have conformed to physical requirements. 1 adequate length of test piece shall be cut from each end and subjected to physical tests. A test piece failing to meet anyone of the requirements. Ifa test piece ftils to meet the respective chemical requirement. 1 Tests for Physical Requirements From the coils selected from CO1 and 2 of Table 7.l Sample shall be taken from each lot and tested for conformity to the standard.2 are satisfied. C-3 PREPARATION OF SAMPLES AND NUMBER OF TESTS C-3. the following procedure shall be followed for chemical requirements: From these test pieces which have conformed to physical requirements further test pieces shall be selected at random accordingtoCO14 of Table 7. it shall be called a defective. These samples sha. of Tests for Chemical Requirements (4) 1 1 2 2 2 Up to 25 26 to 50 51 to 150 151 to 300 301 and above o 0 0 1 1 9 . 23S0442 { 2351519. Kankurgachi CALCUTTA700 054 Northern: SCO 335-336. Amendments Issued Since Publication Amend No. IUUKOT. KANPUR. LUCKNOW. GUWAHATI. if the review indicates that changes are needed. 9 Bahadur ShahZafarMarg.8327858 { 8327891. such as symbols and sizes. This Indian Standard has been developed from Doc: No. Review of Indian Standards Amendments are issued to standards as the need arises onthebasis of comments. This does not preclude the free use. PUNE. Andheri (East) MUMBAI 400093 Branches: AHMADABAD. BHOPAL. HYDEWAD. I. of necessary details. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of ‘BIS Catalogue’ and’ Standards: Monthly Additions’. P. Nopartof thesepublicatioqs maybe reprodueedin any form without the prior permission in writing of BIS.Bureau of Indian Standards BIS is a statutory institution established under the Bureau of Zndian Standards Act. NEWDELHI 110002 Eastern: New Delhi 110002 Telegrams: Manaksanstha ( Common to all offices) Telephone 9 Bahadur ShahZafarMarg 3237617 { 3233841 3378499. BANGALOR. PATNA. Road. CHANDIGARH 160022 Southern: C. marking and quality certification of goods and attending to connected matters in the country. 1986 to promote harmonious development of the activities of standardization. Campus.tlirmed when such review indicates that no changes are needed.3233375. a standard along with amendments is rea. NAGPUR. BIS. BHUBANESHWAR.2352315 8329295. Telephones: 3230131.E. Marol. type or grade designations. GHAZIABAD. FARIDABAD. Enquiries relating to copyright be addressed to the Director (Publications).3379120 603843 { 602025 23502 16. Printed at New India Printing Press. T. Seetor34-A. I. in the course of implementing the standard. MTD 4 ( 4067 ).3239402 Regional Offices: Central: ManakBhavan. COIMBATORE. JAIPUR. Khurjq India . V. Date of Issue Text AfTected BUREAU OF INDIAN STANDARDS Headquarters: ManakBhavan. it is taken up for revision. Copyright BIS has the copyright of all its publications. IV CrossRoa& CHENNAI 600113 Western: Manakalaya. Scheme VII M. Standards are also reviewed periodically.3378561 { 3378626. THIRUVANANTHAP W. I.8327892 1/14 C. T. E9 MIDC.