1、This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc JUNE 2015 Page 1 of 26 NAVISTAR, INC. Material, Parts, and Process Specifications (
2、MPAPS) NUMBER: MPAPS- A-9 Former Designation: CEMS A-9 TITLE: Steel Spring Wire CURRENT REV No.: 1506 DATE: June 2015 WRITTEN/EDITED BY: W. Cook APPROVED BY: R. Goluch SUPERSEDES: December 2002 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specification may involve hazar
3、dous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the applicability of regulatory limits prior to use. Change Notice:
4、Reformated to MPAPS 1.0 APPLICATION Springs are used in a great variety of applications as return springs, balancing springs, compression springs, valve springs, etc. They are generally loaded in torsion; Strength, fatigue life, and surface quality are controlling design features. 2.0 SCOPE This spe
5、cification covers the Companys requirements for steel wire used for the manufacturing of springs. General requirements for springs are shown in Engineering Standard 146. 2.1 Restricted Chemical Substances Effective January 1, 2007, all product supplied to the requirements of this specification must
6、comply with the requirements of the MPAPS B-50 specification. 3.0 REFERENCE DOCUMENTS Unless otherwise specified, the latest issue of all referenced standards shall apply. The following standards, specifications and regulations are referenced in this specification. Quality System Standard ISO 9001 o
7、r TS-16949 ASTM A 227 ASTM A 232 CFR Title 29, Part 1910 ASTM A 228 ASTM A 313 NAVISTAR Manufacturing Std. MS-D-13 ASTM A 229 ASTM A 370 NAVISTAR Engineering Design Std A-16 ASTM A 230 ASTM A 877 NAVISTAR MPAPS B-50 ASTM A 231 INTERNATIONAL Engineering Standard 146 4.0 GENERAL REQUIREMENTS 4.1 Class
8、ification Steel spring wire is classified by material composition and strength properties. 4.2 Chemical Composition Spring wire purchased to this specification will conform to the ladle chemical composition shown in Table I for the type specified. NUMBER: MPAPS A-9 TITLE: Steel Spring Wire CURRENT I
9、SSUE DATE: JUNE 2015 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 2 of 26 TABLE I CHEMICAL COMPOSITION Internati
10、onal Type Approx ASTM Description Chemical Composition, percent (max except where shown as range) Carbon Manganese Phos- phorus Sulfur Silicon Chromium Others 1 A 227 Class II High Tensile Cold Drawn Carbon Steel 0.45-0.85* 0.60-1.30* 0.04 0.05 0.10- 0.30 - - 1H - Extra High Tensile Cold Drawn Carbo
11、n Steel 0.70-1.00* 0.20-1.30* 0.04 0.04 0.10- 0.30 - - 2 A 227 Class I Cold Drawn Carbon Steel 0.45-0.85* 0.60-1.30* 0.04 0.05 0.10- 0.30 - - 3 A 229 Class I Oil Tempered Carbon Steel 0.55-0.85 0.60-1.20 0.04 0.05 0.10- 0.30 - - 3H A 229 Class II High Tensile Oil Tempered Carbon Steel 0.55-0.85 0.60
12、-1.20 0.04 0.05 0.10- 0.30 - - 3S - Square Wire, Oil Tempered 0.55-0.75 0.60-1.20 0.04 0.05 0.12- 0.30 - - 4 A 230 Carbon Steel, Oil Tempered, Valve Spring Quality 0.65-0.75 .065-0.90 0.03 0.03 0.12- 0.35 - - 5 - Cold Drawn Carbon Steel, Valve Spring Quality 0.65-0.75 0.60-0.90 0.03 0.03 0.12- 0.30
13、- - 6 A 228 Music Wire .070-1.00 0.20-0.60 0.03 0.03 0.12- 0.30 - - 7 A 231 Chromium Vanadium, Oil Tempered, Regular Quality 0.45-0.55 0.60-0.90 0.03 0.03 0.20- 0.35 0.80-1.10 Vanadium 0.15-0.25 8 A 232 Chromium Vanadium, Oil Tempered, Valve Spring Quality 0.45-0.55 0.60-0.90 0.03 0.03 0.20- 0.35 0.
14、80-1.10 Vanadium 8A - 0.40-0.60 0.15-0.25 9 A 877 Chromium Silicon, Valve Spring Quality 0.51-0.59 0.50-0.80 0.025 0.025 1.20- 1.60 0.60-0.80 - 12 A 313 Stainless, UNS S30200 0.15 2.00 0.04 0.03 1.00 17.00-19.00 Nickel 8.00-10.00 13 A 313 Stainless, UNS S30400, Regular Quality 0.08 2.00 0.04 0.03 1.
15、00 18.00-20.00 Nickel 8.00-12.00 14 - Stainless, UNS S30400 Valve Spring Quality 0.08 2.00 0.04 0.03 1.00 18.00-20.00 Nickel 8.00-12.00 15 - 17-7 PH, Precipitation Hardening Stainless 0.09 1.00 0.04 0.03 1.00 16.00-18.00 Nickel 6.50-7.75 Aluminum 0.75-1.50 * Carbon and manganese in any one lot will
16、not vary more than 0.13 and 0.30%, respectively * Carbon and manganese in any one lot will not vary more than 0.20 and 0.30%, respectively. Type 8A is a modification of Type 8. NUMBER: MPAPS A-9 TITLE: Steel Spring Wire CURRENT ISSUE DATE: JUNE 2015 This document is restricted and may not be sent ou
17、tside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 3 of 26 4.3 Mechanical Properties Wire purchased to this specification will conform to the mechanical property requir
18、ements shown herein for the type specified. See “Methods of Test,” page 19. 4.3.1 Tensile Strength Requirements for the tensile properties are shown in Tables II thru IX. Metric equivalents are shown in Tables IIA and IXA. Approximate values shown for theoretical torsion elastic limits are for desig
19、n information only, and are not part of the specification requirements. TABLE II TENSILE PROPERTIES COLD DRAWN CARBON STEEL SPRING WIRE Wire Size Type 1 Type IH Type 2* high tensile cold drawn carbon steel extra high tensile cold drawn carbon steel cold drawn carbon steel Steel Wire Gage Dia- meter,
20、 Inch Tensile Strength Thousands, psi Torsional* Elastic Limit, Thousands, psi (Not a Requirement) Tensile Strength Thousands, psi Torsional* Elastic Limit, Thousands, psi (Not a Requirement) Tensile Strength Thousands, psi Torsional* Elastic Limit, Thousands, psi (Not a Requirement) min max min max
21、 min max 25 24 23 22 21 0.0204 0.0230 0.0258 0.0286 0.0317 324 320 316 312 307 364 360 356 352 347 178 176 174 172 169 350 346 337 332 327 387 381 373 367 361 192 190 185 193 180 283 279 275 271 266 323 319 315 311 306 142 140 138 136 133 20 19 18 17 16 0.0348 0.0410 0.0475 0.0540 0.0625 302 294 287
22、 280 273 342 332 325 316 308 166 162 158 154 150 325 314 306 301 295 359 348 339 332 325 179 173 168 166 162 261 255 248 243 237 301 293 286 279 272 130 128 124 122 118 15 14 13 12 11 0.0720 0.0800 0.0915 0.1055 0.1205 267 262 254 249 242 301 296 287 281 273 147 144 137 134 131 287 282 276 269 263 3
23、17 312 305 297 291 158 155 149 145 142 232 227 220 216 210 266 261 253 248 241 116 114 110 108 105 10 9 8 7 6 0.1350 0.1483 0.1620 0.1770 0.1920 238 235 231 226 222 269 266 261 256 251 129 127 125 120 118 258 253 249 245 241 285 280 275 270 267 139 137 134 130 128 206 203 200 195 192 237 234 230 225
24、 221 103 102 100 98 96 5 4 3 1/4 2 0.2070 0.2253 0.2437 0.2500 0.2625 219 215 213 211 211 247 243 241 239 238 116 114 113 112 112 238 235 232 230 227 264 260 257 255 252 126 125 123 122 120 190 186 183 182 180 218 214 211 210 208 95 93 92 91 90 1 1/0 5/16 11/32 3/8 0.2830 0.3065 0.3125 0.3438 0.3750
25、 209 206 201 197 194 236 233 227 223 220 111 109 107 104 103 224 220 217 213 210 249 245 242 238 235 119 117 115 113 111 178 175 174 170 167 204 201 200 196 193 89 88 87 85 84 13/32 7/16 1/2 17/32 0.4063 0.4375 0.5000 0.5312 192 191 181 178 217 216 205 202 102 101 96 94 208 206 195 190 233 231 220 2
26、10 110 109 103 101 166 165 156 154 191 190 180 178 83 82 78 77 * Type 2- Sizes below 0.0204 inch; tensile properties are subject to agreement. * Average values. NUMBER: MPAPS A-9 TITLE: Steel Spring Wire CURRENT ISSUE DATE: JUNE 2015 This document is restricted and may not be sent outside Navistar,
27、Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 4 of 26 4.3.1 Tensile Strength (Continued) TABLE III TENSILE PROPERTIES OIL TEMPERED CARBON STEEL SPRING WIRE Wire Size Type 3* Type
28、3H Oil Tempered Carbon Steel High Tensile Oil Tempered Carbon Steel Steel Wire Gage Dia- meter, Inch Tensile Strength Thousands, psi Torsional* Elastic Limit, Thousands, psi (Not a Requirement) Tensile Strength Thousands, psi Torsional* Elastic Limit, Thousands, psi (Not a Requirement) min max min m
29、ax 25 24 23 22 21 0.0204 0.0230 0.0258 0.0286 0.0317 293 289 286 283 280 323 319 316 313 310 178 176 174 173 171 324 320 317 314 311 354 350 347 344 341 198 195 193 192 190 20 19 18 17 16 0.0348 0.0410 0.0475 0.0540 0.0625 274 266 259 253 247 304 296 289 283 277 167 165 161 157 153 305 297 290 284 2
30、78 335 327 320 314 308 186 184 180 176 172 15 14 13 12 11 0.0720 0.0800 0.0915 0.1055 0.1205 241 235 230 225 220 271 265 260 255 250 149 146 143 140 136 272 266 261 256 251 302 296 291 286 281 169 165 162 159 156 10 9 8 7 6 0.1350 0.1483 0.1620 0.1770 0.1920 215 210 205 200 195 240 235 230 225 220 1
31、33 130 127 124 123 241 236 231 226 221 266 261 256 251 246 149 146 143 140 139 5 4 3 1/4 2 0.2070 0.2253 0.2437 0.2500 0.2625 190 188 187 185 185 215 213 212 210 210 120 118 118 117 117 216 214 213 211 211 241 239 238 236 236 136 135 134 133 133 1 1/0 5/16 11/32 3/8 0.2830 0.3065 0.3125 0.3438 0.375
32、0 184 183 183 181 180 209 208 208 206 205 116 112 110 109 108 210 209 209 207 206 235 234 234 232 231 132 128 125 124 122 13/32 7/16 1/2 17/32 0.4063 0.4375 0.5000 0.5312 177 175 170 167 202 200 195 192 106 105 102 100 203 201 196 193 228 226 221 218 122 121 118 116 * Type 3 Sizes below 0.0204 inch;
33、 tensile properties are subject to agreement. * Average values. NUMBER: MPAPS A-9 TITLE: Steel Spring Wire CURRENT ISSUE DATE: JUNE 2015 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required
34、to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 5 of 26 4.3.1 Tensile Strength (Continued) TABLE IV TENSILE PROPERTIES OIL TEMPERED CARBON STEEL SQUARE SPRING WIRE Type 3S Wire Size Square Wire, Oil Tempered Wire Size Square Wire, Oil Tempered Tensile Strength Thousands, psi To
35、rsional Elastic Limit, * Thousands, psi (Not a Requirement) Tensile Strength Thousands, psi Torsional Elastic Limit, * Thousands, psi (Not a Requirement) Width, inch Width, inch min max min max 0.050 0.054 0.062 0.072 0.080 253 247 241 235 230 283 277 271 265 260 162 158 154 150 147 0.162 0.177 0.19
36、2 0.207 0.225 200 195 190 188 185 225 220 215 213 210 128 125 122 120 118 0.091 0.105 0.120 0.135 0.148 225 220 215 210 205 255 250 240 235 230 144 141 138 134 131 0.250 0.312 0.375 0.437 0.500 183 180 175 170 165 208 205 200 195 190 117 115 112 109 105 * Average values TABLE V TENSILE PROPERTIES CA
37、RBON STEEL SPRING WIRE, VALVE SPRING QUALITY Wire Size Type 4* Type 5* Carbon Steel, Oil Tempered, Valve Spring Quality Cold Drawn Carbon Steel, Valve Spring Quality Steel Wire Gage Dia- meter, Inch Tensile Strength Thousands, psi Torsional* Elastic Limit, Thousands, psi (Not a Requirement) Tensile
38、Strength Thousands, psi Torsional* Elastic Limit, Thousands, psi (Not a Requirement) min max min max 13 12 11 0.0915 0.1055 0.1205 235 255 152 235 235 235 260 260 260 132 132 132 10 9 8 0.1350 0.1483 0.1620 230 250 148 225 225 225 250 250 250 126 126 126 7 6 0.1770 0.1920 225 245 145 215 215 240 240
39、 122 122 5 4 0.2070 0.2253 220 240 142 - - - 3 2 0.2437 0.2625 215 235 138 - - - * Minimum reduction of area will be 40% * Average values NUMBER: MPAPS A-9 TITLE: Steel Spring Wire CURRENT ISSUE DATE: JUNE 2015 This document is restricted and may not be sent outside Navistar, Inc. or reproduced with
40、out permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 6 of 26 4.3.1 Tensile Strength (Continued) TABLE VI TENSILE PROPERTIES MUSIC SPRING WIRE Type 6 Wire Size Tensile Strength Thousands, psi Torsional* Elastic
41、 Limit, Thousands, psi (Not a Requirement) Wire Size Tensile Strength Thousands, psi Torsional* Elastic Limit, Thousands, psi (Not a Requirement) Steel Wire Gage Dia- meter, Inch Steel Wire Gage Dia- meter, Inch min max min max 6/0 5/0 4/0 3/0 2/0 1/0 0.004 0.005 0.006 0.007 0.008 0.009 439 426 415
42、407 399 393 485 471 559 449 441 434 191 191 191 191 190 190 23 24 25 26 27 28 0.051 0.055 0.059 0.063 0.067 0.071 303 300 296 293 290 288 335 331 327 324 321 318 173 171 169 167 165 164 1 2 3 4 5 0.010 0.011 0.012 0.013 0.014 387 382 377 373 369 428 422 417 412 408 190 190 189 189 189 - - 30 31 32 3
43、3 0.072 0.076 0.080 0.085 0.090 0.095 287 284 282 279 276 274 317 314 312 308 305 303 163 161 160 158 156 155 - 6 7 8 9 10 0.015 0.016 0.018 0.020 0.022 0.024 365 362 356 350 345 341 404 400 393 387 382 377 189 188 188 188 187 186 34 - - - 36 0.100 0.102 0.107 0.110 0.112 271 270 268 267 266 300 299
44、 296 295 294 153 153 151 151 150 11 - - - - 0.026 0.028 0.030 0.032 0.034 337 333 330 327 324 373 368 365 361 358 185 184 183 182 182 - - 39 - 0.121 0.125 0.130 0.135 263 261 259 258 290 288 286 285 148 147 146 145 - - - - 20 - 0.036 0.038 0.040 0.042 0.045 0.048 321 318 315 313 309 306 355 352 349
45、346 342 339 181 179 179 178 176 174 - - - - 0.140 0.145 0.150 0.156 256 254 253 251 283 281 279 277 144 143 142 140 - - - - 0.162 0.177 0.192 0.207 249 245 241 238 275 270 267 264 - - - - * Average Values NUMBER: MPAPS A-9 TITLE: Steel Spring Wire CURRENT ISSUE DATE: JUNE 2015 This document is restr
46、icted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 7 of 26 4.3.1 Tensile Strength (Continued) TABLE VII TENSILE PROPERTIES ALLOY STEEL SPRIN
47、G WIRE Wire Size Type 7* Type 8* Type 8A* Type 9* Regular Quality Valve Spring Quality Modified Chromium Vanadium, Oil Tempered, Valve Spring Quality Chromium Silicon, Valve Spring Quality Chromium Vanadium, Oil Tempered Steel Wire Gage Dia- meter, inch Tensile Strength Thousands, psi Torsional Elastic Limit, Thousands, psi (Not a Requirement) Tensile Strength Thousands, psi Torsional Elastic Limit, Thousands, psi (Not a Requirement) Tensile Strength Thousands, psi Torsional Elastic Limit, Thousands, psi (Not a Requirement) min max min max min max 22 21 20
