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Standard:
ASTM A227
Standard Specification for Steel Wire, Cold-Drawn for Mechanical Springs
Chemistry
|
Element
|
Composition, %
|
|
Carbon
|
0.45 - 0.85
|
|
Manganese
|
0.30 - 1.30
|
|
Phosphorus, max
|
0.040
|
|
Sulfur, max
|
0.050
|
|
Silicon
|
0.15 - 0.35
|
Tensile Requirements: Inch-Pound Units
|
Diameter (Inch)
|
Class I - Tensile Strength KSI Min
|
Class I - Tensile Strength KSI Max
|
Class II - Tensile Strength KSI Min
|
Class II - Tensile Strength KSI Max
|
|
0.020
|
283
|
323
|
324
|
364
|
|
0.023
|
279
|
319
|
320
|
360
|
|
0.026
|
275
|
315
|
316
|
356
|
|
0.029
|
271
|
311
|
312
|
352
|
|
0.032
|
266
|
306
|
307
|
347
|
|
0.035
|
261
|
301
|
302
|
342
|
|
0.041
|
255
|
293
|
294
|
332
|
|
0.048
|
248
|
286
|
287
|
325
|
|
0.054
|
243
|
279
|
280
|
316
|
|
0.062
|
237
|
272
|
273
|
308
|
|
0.072
|
232
|
266
|
267
|
301
|
|
0.080
|
227
|
261
|
262
|
296
|
|
0.092
|
220
|
253
|
254
|
287
|
|
0.106
|
216
|
248
|
249
|
281
|
|
0.120
|
210
|
241
|
242
|
273
|
|
0.135
|
206
|
237
|
238
|
269
|
|
0.148
|
203
|
234
|
235
|
266
|
|
0.162
|
200
|
230
|
231
|
261
|
|
0.177
|
195
|
225
|
226
|
256
|
|
0.192
|
192
|
221
|
222
|
251
|
|
0.207
|
190
|
218
|
219
|
247
|
|
0.225
|
186
|
214
|
215
|
243
|
|
0.250
|
182
|
210
|
211
|
239
|
|
0.312
|
174
|
200
|
201
|
227
|
|
0.375
|
167
|
193
|
194
|
220
|
|
0.438
|
165
|
190
|
191
|
216
|
|
0.500
|
156
|
180
|
181
|
205
|
|
0.562
|
152
|
176
|
177
|
201
|
|
0.625
|
147
|
170
|
171
|
294
|
Permissible Variations in Wire Diameter
|
Diameter (Inch)
|
Permissible Plus and Minus
|
Permissible Out of Round
|
|
0.020 to 0.028, incl.
|
0.0008
|
0.0008
|
|
Over 0.028 to 0.075, incl.
|
0.001
|
0.001
|
|
Over 0.075 to 0.375, incl.
|
0.002
|
0.002
|
|
Over 0.375 to 0.625, incl.
|
0.003
|
0.003
|
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