牌號(hào) | 25CrMo4 |
1.7218 | |
對(duì)應(yīng)標(biāo)準(zhǔn) | NF EN 10269-1999
用于高溫或低溫條件下的緊固件用鋼及鎳合金 |
歸類 | 合金鋼 |
性能 | 淬透性 |
標(biāo)簽 | 淬火回火鋼 |
密度 | 7.85 g/cm3 |
Material designation | Heat treatment condition | Diameter d mm | Minimum 0.2%-proof strength Rp0.2 in MPa at a temperature (in°C) of: | |||||||||||||
Name | Number | 50 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 550 | 600 | 650 | ||
25CrMo4 | 1.7218 | +QT | d≤100 | 435 | 428 | 420 | 412 | 392 | 363 | 333 | 304 | 275 | 235 | - | - | - |
+QT | 100<d≤150 | 414 | 403 | 393 | 382 | 372 | 344 | 324 | 294 | 265 | 226 | - | - | - |
Material designation | Heat treatment condition | Diameter d mm | Minimum fracture energy in shock bending (in J) (ISO-V specimens) at a temperature (in ℃) of: | ||||||||||||||||
Name | Number | -270 | -196 | -160 | -140 | -120 | -110 | -100 | -90 | -80 | -70 | -60 | -50 | -40 | -20 | 0 | +20 | ||
25CrMo4 | 1.7218 | +QT | d≤60 | - | - | - | - | - | - | - | - | - | - | 40 | 40 | 45 | 50 | - | 60 |
+QT | 60<d≤100 | - | - | - | - | - | - | - | - | - | - | - | 40 | 40 | 50 | - | 60 |
Material designation | Heat treatment condition | Normalizing,quenching or solution annealing temperature °C | Type of cooling① | Tempering or precipitation treatment (and time) °C | |
Name | Number | ||||
25CrMo4 | 1.7218 | +QT | 840 to 880 | w,o | 540 to 680 |
◎ 根據(jù)原件相關(guān)規(guī)定芹扭,如果允許矯直后消除應(yīng)力,應(yīng)選擇消除應(yīng)力的溫度赦抖,以獲得規(guī)定的性能舱卡。 | |||||
① a=air; o=oil; w=water |
Designation | Temperature | Strength for 1% (plastic) creep strain ① | Creep rupture strength for ② | ||||
Name | Number | °C | 10000h | 100000h | 10000h | 100000h | 200000h |
25CrMo4 | 1.7218 | 420 | 274 | 221 | 387 | 308 | - |
430 | 258 | 203 | 364 | 281 | - | ||
440 | 242 | 186 | 338 | 253 | - | ||
450 | 226 | 171 | 311 | 226 | - | ||
460 | 210 | 155 | 283 | 200 | - | ||
470 | 195 | 141 | 255 | 178 | - | ||
480 | 180 | 127 | 226 | 157 | - | ||
490 | 163 | 112 | 200 | 136 | - | ||
500 | 147 | 98 | 176 | 118 | - | ||
510 | 130 | 83 | 153 | 100 | - | ||
520 | 115 | 69 | 133 | 82 | - | ||
530 | 98 | 54 | 114 | 66 | - | ||
540 | 81 | 39 | 95 | 51 | - | ||
550 | 64 | 25 | 79 | 36 | - |
◎ The values given in this table are the mean values of the scatter band so far obtained, which will be checked from time to time as further test results become available and if necessary corrected. ◎ * and () indicate values of extended stress extrapolation or time extrapolation, respectively. ① This is the stress relative to the initial cross- section leadina to a permanent elongation of 1 % after 10000 h and 100000 h. ② This is the stress relative to the initial cross- section leading to fracture after 10000 h, 100000 h and 200000 h. |