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    EN 10269 Relaxation Properties

    Reference data for residual stress and preload retention at elevated temperatures

    EN 10269 provides informative relaxation property data for selected fastener materials to help assess preload loss during long-term elevated temperature service.

    Material designation Temperature for an initial
    strain εA total
    %     		Residual stress in MPa after
    stressing duration for
    Name Number 1 000 h 10 000 h 30 000 h 100 000 h
    42CrMo5-6 1.7233 350 0,15 211 205 201 –
    400 198 179 164
    450 157 118 96
    500 93 30  
    40CrMoV4-6 1.7711 400 0,15 234 215 192 –
    450 188 157 141
    500 136 83 47
    21CrMoV5-7 1.7709 300 0,2 328 325 317 –
    350 318 300 290 280
    360 315 296 286 276
    370 311 292 282 271
    380 307 288 278 266
    390 302 282 272 260
    400 295 275 265 250
    410 287 266 254 238
    420 278 255 240 222
    430 267 242 227 205
    440 253 228 210 185
    450 240 210 190 165
    460 225 189 166 140
    470 209 162 139 111
    480 190 133 109 82
    490 171 107 81 59
    500 155 85 60 38
    510 139 68 47 28
    520 122 55 37 20
    530 107 46 28 15
    540 91 39 22 10
    550 77 33 17 7
    20CrMoVTiB
    4-10    		 1.7729 400 0,15 247 224 212 –
    450 216 188 173
    500 180 141 118
    550 134 70 42
    600 61 – –
    X22CrMoV12-1 1.4923 400 0,2 307 280 265 245
    410 294 264 249 229
    420 280 249 232 212
    430 267 232 218 197
    440 252 218 200 180
    450 238 202 185 165
    460 225 188 170 152
    470 211 175 157 139
    480 198 162 144 126
    490 183 150 132 114
    500 170 137 120 102
    510 157 124 107 90
    520 143 110 94 79
    530 130 96 81 67
    540 118 82 68 55
    550 105 70 57 43
    560 94 60 47 –
    570 84 52 39 –
    580 75 45 31 –
    590 66 38 23 –
    600 56 30 15 –
    X19CrMoNbVN11-1 1.4913 400 0,2 262 237 206 –
    410 257 231 202
    420 252 225 199
    430 246 218 195
    440 240 212 190
    450 234 206 185 –
    460 228 198 180
    470 221 191 173
    480 214 183 165
    490 207 175 157
    500 199 166 147 –
    510 190 155 136
    520 181 143 124
    530 171 130 108
    540 160 114 92
    550 149 98 79 –
    560 134 78 66
    570 118 63 53
    580 100 48 40
    590 80 39 30
    600 61 30 21 –
    X10CrNiMoMnNbVB
    15-10-1    		 1.4982 550 0,15 – 200 – –
    600 165
    625 140
    650 122
    700 55
    NiCr20TiAl 2.4952 450 0,15 280 266 256 –
    500 271 250 234 –
    510 269 245 228
    520 266 239 221
    530 263 232 213
    540 259 225 205
    550 255 218 196 –
    560 249 209 187
    570 244 201 176
    580 238 193 166
    590 231 183 155
    600 224 174 144 –
    610 216 163 133
    620 208 153 121
    630 200 141 108
    640 190 129 96
    650 0,15
    and
    0,20    		 181 119 85 –
    660 170 107 75
    670 160 97 65
    680 149 88 56
    690 138 79 48
    700 127 70 40 –
    710 117 61 33
    720 107 53 27
    730 97 45 22
    740 88 38 17
    750 79 31 13 –
    • a   The values given in this table are the mean values of the scattered band so far obtained, which will be checked from time to time as further results become available and if necessary corrected.
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