Music Wire is one of the most widely used products by the Spring Making Industry
ASTM A228
Standard Specification for Steel Wire, Music Spring Quality (Music wire is supplied with many types of finish such as bright, phosphate, tin, zinc and others.)
It offers uniform tensile strength which, when coupled with a good wire spring design, will offer many thousands of cycles of spring life.
Chemistry
|
Element
|
Composition, %
|
|
Carbon
|
0.70 - 1.00
|
|
Magnese
|
0.20 - 0.70
|
|
Phosphorus, max
|
0.025
|
|
Sulfur, max
|
0.030
|
|
Silicon
|
0.10 - 0.30
|
Tensile Requirements
|
Diameter (Inch)
|
Tensile Strength KSI Min
|
Tensile Strength KSI Max
|
|
0.004
|
439
|
485
|
|
0.005
|
426
|
471
|
|
0.006
|
415
|
459
|
|
0.007
|
407
|
449
|
|
0.008
|
399
|
441
|
|
0.009
|
393
|
434
|
|
0.010
|
387
|
428
|
|
0.011
|
382
|
422
|
|
0.012
|
377
|
417
|
|
0.013
|
373
|
412
|
|
0.014
|
369
|
408
|
|
0.015
|
365
|
404
|
|
0.016
|
362
|
400
|
|
0.018
|
356
|
393
|
|
0.020
|
350
|
387
|
|
0.022
|
345
|
382
|
|
0.024
|
341
|
377
|
|
0.026
|
337
|
373
|
|
0.028
|
333
|
368
|
|
0.030
|
330
|
365
|
|
0.032
|
327
|
361
|
|
0.034
|
324
|
358
|
|
0.036
|
321
|
355
|
|
0.038
|
318
|
352
|
|
0.040
|
315
|
349
|
|
0.042
|
313
|
346
|
|
0.045
|
309
|
342
|
|
0.048
|
306
|
339
|
|
0.051
|
303
|
335
|
|
0.055
|
300
|
331
|
|
0.059
|
296
|
327
|
|
0.063
|
293
|
324
|
|
0.067
|
290
|
321
|
|
0.072
|
287
|
317
|
|
0.076
|
284
|
314
|
|
0.080
|
282
|
312
|
|
0.085
|
279
|
308
|
|
0.090
|
276
|
305
|
|
0.095
|
274
|
303
|
|
0.100
|
271
|
300
|
|
0.102
|
270
|
299
|
|
0.107
|
268
|
296
|
|
0.110
|
267
|
295
|
|
0.112
|
266
|
294
|
|
0.121
|
263
|
290
|
|
0.125
|
261
|
288
|
|
0.130
|
259
|
286
|
|
0.135
|
258
|
285
|
|
0.140
|
256
|
283
|
|
0.145
|
254
|
281
|
|
0.150
|
253
|
279
|
|
0.156
|
251
|
277
|
|
0.162
|
249
|
275
|
|
0.177
|
245
|
270
|
|
0.192
|
241
|
267
|
|
0.207
|
238
|
264
|
|
0.225
|
235
|
260
|
|
0.250
|
230
|
255
|
Permissible Variations in Wire Diameter
|
Diameter (Inch)
|
Permissible Plus and Minus
|
Permissible Out of Round
|
|
0.004 to 0.010, incl.
|
0.0002
|
0.0002
|
|
Over 0.010 to 0.028, incl.
|
0.0003
|
0.0003
|
|
Over 0.028 to 0.063, incl.
|
0.0004
|
0.0004
|
|
Over 0.063 to 0.080, incl.
|
0.0005
|
0.0005
|
|
Over 0.080 to 0.250, incl.
|
0.001
|
0.001
|
The above notes are intended to provide general information about product specifications. Please contact InterWire so that our expert staff can provide more detailed product specifications and work with you to find the best products for your requirements.