17-7 PH Stainless Steel Wire

17-7 PH Stainless Steel Spring Wire

ASTM A313

The wire is first cold drawn and then precipitation hardened after fabrication. High strength and offers a standard corrosion resistance for use in specific applications. The material is slightly magnetic in spring temper format.

Chemical Requirements (Composition, %)

Stainless Steel Austenitic Grades

UNS# Type C mn p s si cr ni mo n Other
S30200 302 0.12 2.00 0.045 0.030 1.00 17.0-19.0 8.0-9.5 0.10
S30400 304 0.08 2.00 0.045 0.030 1.0 18.0-20.0 8.0-10.5 0.10
S31600 316 0.07 2.00 0.045 0.030 1.00 16.5-18.0 10.5-13.5 2.0-2.5 0.10

Stainless Steel Age-Hardenable Grades

UNS# Type C mn p s si cr ni mo n Other
S17700 631 0.09 1.00 0.040 0.030 1.00 16.0-18.0 6.5-7.8 AI 0.75-1.5

Tensile Requirements for Types 302 class I and 304

Diameter (Inch) Bend test
Min number of bends
Tensile Strength
KSI Min
Tensile Strength
KSI Max
Up to 0.009, incl N/A 325 355
Over 0.009 to 0.010, incl N/A 320 350
Over 0.010 to 0.011, incl N/A 318 348
Over 0.011 to 0.012, incl N/A 316 346
Over 0.012 to 0.013, incl N/A 324 344
Over 0.013 to 0.014, incl N/A 312 342
Over 0.014 to 0.015, incl N/A 310 340
Over 0.015 to 0.016, incl N/A 308 338
Over 0.016 to 0.017, incl N/A 306 336
Over 0.017 to 0.018, incl N/A 304 334
Over 0.018 to 0.020, incl N/A 300 330
Over 0.020 to 0.022, incl N/A 296 326
Over 0.022 to 0.024, incl N/A 292 322
Over 0.024 to 0.026, incl 8 291 320
Over 0.026 to 0.028, incl 8 289 318
Over 0.028 to 0.031, incl 8 285 315
Over 0.031 to 0.034, incl 8 282 310
Over 0.034 to 0.037, incl 8 280 308
Over 0.037 to 0.041, incl 8 275 304
Over 0.041 to 0.045, incl 8 272 300
Over 0.045 to 0.050, incl 8 267 295
Over 0.050 to 0.054, incl 8 265 293
Over 0.054 to 0.058, incl 7 261 289
Over 0.058 to 0.063, incl 7 258 285
Over 0.063 to 0.070, incl 7 252 281
Over 0.070 to 0.075, incl 7 250 278
Over 0.075 to 0.080, incl 7 246 275
Over 0.080 to 0.087, incl 7 242 271
Over 0.087 to 0.095, incl 7 238 268
Over 0.095 to 0.105, incl 5 232 262
Over 0.105 to 0.115, incl 5 227 257
Over 0.115 to 0.125, incl 5 222 253
Over 0.125 to 0.135, incl 3 217 248
Over 0.135 to 0.148, incl 3 210 241
Over 0.148 to 0.162, incl 3 205 235
Over 0.162 to 0.177, incl 3 198 228
Over 0.177 to 0.192, incl 1 194 225
Over 0.192 to 0.207, incl 1 188 220
Over 0.207 to 0.225, incl 1 182 214
Over 0.225 to 0.250, incl 1 175 205
Over 0.250 to 0.278, incl 1 168 198
Over 0.278 to 0.306, incl 1 161 192
Over 0.306 to 0.331, incl 1 155 186
Over 0.331 to 0.362, incl 1 150 180
Over 0.362 to 0.394, incl 1 145 175
Over 0.394 to 0.438, incl 1 140 170
Over 0.438 to 0.500, incl 1 135 165
Over 0.500 130 160

When wire is specified in straightened and cut lengths, the minimum tensile strength shall be 90% of the value listed in table.

Tensile Requirements for Type 316

Diameter (Inch) Bend test
Min number of bends
Tensile Strength
KSI Min
Tensile Strength
KSI Max
Up to 0.010, incl N/A 245 275
Over 0.010 to 0.015, incl N/A 240 270
Over 0.015 to 0.024, incl N/A 235 265
Over 0.024 to 0.041, incl 8 235 265
Over 0.041 to 0.047, incl 8 230 260
Over 0.047 to 0.054, incl 8 225 255
Over 0.054 to 0.062, incl 7 220 250
Over 0.062 to 0.072, incl 7 215 245
Over 0.072 to 0.080, incl 7 210 240
Over 0.080 to 0.092, incl 7 205 235
Over 0.092 to 0.105, incl 5 200 230
Over 0.105 to 0.120, incl 5 195 225
Over 0.120 to 0.148, incl 3 185 215
Over 0.148 to 0.166, incl 3 180 210
Over 0.166 to 0.177, incl 3 170 200
Over 0.177 to 0.207, incl 1 160 190
Over 0.207 to 0.225, incl 1 155 185
Over 0.225 to 0.250, incl 1 150 180
Over 0.250 to 0.312, incl 1 140 170
Over 0.312 to 0.375, incl 1 135 165
Over 0.375 to 0.500, incl 130 160
Over 0.500 125 155

When wire is specified in straightened and cut lengths, the minimum tensile strength shall be 90% of the value listed in table.

Tensile Requirements for Type 631, Condition CH – 900

Diameter (Inch) Cold Drawn
Condition C
KSI nominal
Tensile Strength
KSI Min
Tensile Strength
KSI Max
Over 0.010 to 0.015, incl 295 335 365
Over 0.015 to 0.020, incl 290 330 360
Over 0.020 to 0.029, incl 285 325 355
Over 0.029 to 0.041, incl 275 320 350
Over 0.041 to 0.051, incl 270 310 340
Over 0.051 to 0.061, incl 265 305 335
Over 0.061 to 0.071, incl 257 297 327
Over 0.071 to 0.086, incl 255 292 322
Over 0.086 to 0.090, incl 245 282 312
Over 0.090 to 0.100, incl 242 279 309
Over 0.100 to 0.106, incl 238 274 304
Over 0.106 to 0.130, incl 236 272 302
Over 0.130 to 0.138, incl 230 260 290
Over 0.138 to 0.146, incl 228 258 288
Over 0.146 to 0.162, incl 226 256 286
Over 0.162 to 0.180, incl 224 254 284
Over 0.180 to 0.207, incl 222 252 282
Over 0.207 to 0.225, incl 218 248 278
Over 0.225 to 0.306, incl 213 242 272
Over 0.306 to 0.440, incl 207 235 265
Over 0.440 to 0.625, incl 203 230 260

When wire is specified in straightened and cut lengths, the minimum tensile strength shall be 90% of the value listed in table.