| 牌號 | 25CrMo4 |
|---|---|
| 1.7218 | |
| 對應標準 | NF EN 10269-1999
用于高溫或低溫條件下的緊固件用鋼及鎳合金 Steels and Nickel Alloys for Fasteners with Specified Elevated and/or Low Temperature Properties |
| 歸類 | 合金鋼 |
| 性能 | 淬透性 |
| 標簽 | 淬火回火鋼 |
| 密度 | 7.85 g/cm3 |
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交付條件下在高溫下的最小屈服強度
Material designation Heat treatment
conditionDiameter
d
mmMinimum 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 - - -
-
低溫最小沖擊吸收能量（縱向）
Material designation Heat treatment
conditionDiameter
d
mmMinimum 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
-
符合本歐洲標準的產品熱處理指南
Material designation Heat treatment
conditionNormalizing,quenching
or solution annealing
temperature
°CType of
cooling①Tempering or
precipitation
treatment (and time)
°CName Number 25CrMo4 1.7218 +QT 840 to 880 w,o 540 to 680 ◎ 根據原件相關規定，如果允許矯直后消除應力，應選擇消除應力的溫度，以獲得規定的性能。 ① a=air; o=oil; w=water
-
蠕變性能
Designation Temperature Strength for
1% (plastic)
creep strain ①Creep rupture
strength for ②Name 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.
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