| 牌号 | 21CrMoV5-7 |
|---|---|
| 1.7709 | |
| 对应标准 | NF EN 10269-1999
用于高温或低温条件下的紧固件用钢及镍合金 |
| 归类 | 合金钢 |
| 标签 | 淬火回火钢 |
| 密度 | 7.85 g/cm3 |
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交付条件下在高温下的最小屈服强度
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 21CrMoV5-7 1.7709 +QT d≤160 542 530 515 500 480 460 435 410 380 350 - - -
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符合本欧洲标准的产品热处理指南
Material designation Heat treatment
conditionNormalizing,quenching
or solution annealing
temperature
°CType of
cooling①Tempering or
precipitation
treatment (and time)
°CName Number 21CrMoV5-7 1.7709 +QT 900 to 950 a,o 680 to 720（min.2 h） ◎ 根据原件相关规定，如果允许矫直后消除应力，应选择消除应力的温度，以获得规定的性能。 ① a=air; o=oil; w=water
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物理性能
各温度°C时静态弹性模量 20°C与各温度间热膨胀系数 热导率 比热容 电阻率 20 100 200 300 400 500 600 700 800 100°C 200°C 300°C 400°C 500°C 600°C 20°C 20°C 20°C GPa 10-6 K-1 W/m.K J/kg.K Ω.mm2/m 211 204 196 186 177 164 127 - - 11.1 12.1 12.9 13.5 13.9 14.1 33 460 n.a. n.a.: no values available
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蠕变性能
Designation Temperature Strength for
1% (plastic)
creep strain ①Creep rupture
strength for ②Name Number °C 10000h 100000h 10000h 100000h 200000h 21CrMoV5-7 1.7709 420 429 365 466 399 379 430 407 340 443 375 353 440 385 315 420 350 328 450 363 288 396 325 303 460 339 262 373 300 277 470 314 235 349 274 252 480 289 208 325 249 226 490 263 182 301 224 201 500 238 156 277 199 176 510 212 132 253 174 151 520 186 109 228 150 127 530 161 89 204 126 104 540 138 71 180 103 82 550 116 56 157 82 62 ◎ 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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松弛性能
Material designation Temperature
℃for an
initial strain
∈A total
%Residual stress in N/mm2
after stressing duration forName Number 1000 h 10000 h 30000 h 21CrMoV5-7 1.7709 300 0.2 328 325 317 350 314 299 292 400 288 262 250 410 281 252 235 420 273 242 222 430 263 227 200 440 253 211 180 450 239 186 154 460 224 163 130 470 208 138 108 480 191 117 90 490 172 98 70 500 150 81 56 510 128 67 43 520 109 53 33 530 92 41 25 540 75 33 18 ◎ 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.
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