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牌號(hào) 20CrMoVTiB4-10
1.7729
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
標(biāo)簽 淬火回火鋼
20CrMoVTiB4-10 化學(xué)元素成分含量(%)
成分 C Si Mn P S Cr Ni Cu Mo As Ti V B Al Sn
最小值 0.17 - 0.35 - - 0.9 - - 0.9 - 0.07 0.6 0.001 0.015 -
最大值 0.23 0.4 0.75 0.02 0.02 1.2 0.2 0.2 1.1 0.02 0.15 0.8 0.01 0.08 0.02
◎ 未經(jīng)買方同意瞎嬉,不得隨意向鋼中添加表中未列的元素,冶煉精加工除外。采用一切必要措施以防在廢鋼和生產(chǎn)原料中帶入這些元素,因?yàn)槠鋾?huì)削弱鋼的機(jī)械性能,降低鋼的適用性
20CrMoVTiB4-10 機(jī)械性能
直徑
d
mm
熱處理或狀態(tài)
抗拉強(qiáng)度
σb
Mpa
屈服點(diǎn)
σs
Mpa
斷后伸長(zhǎng)率或延伸率
δ
%
斷面收縮率
ψ
%
沖擊吸收能量
KV2
J
d≤100 +QT 820~1000 ≥660 ≥15 ≥50 ≥40
100<d≤160 +QT 820~1000 ≥660 ≥15 ≥50 ≥27
◎ +AT=固溶退火妓付;+C=冷作硬化;+N=正火;+NT=正火及回火预吆;+P=沉淀硬化;+QT=淬火及回火胳泉;WW=熱作硬化拐叉;+AC=球化退火;+A=軟化退火扇商;+S=冷剪處理(treated for cold shearing)
鋼在室溫和20攝氏度交貨條件下的機(jī)械性能厨棒,符合97/23/EC的基本安全要求

  • 交付條件下在高溫下的最小屈服強(qiáng)度

    Material designationHeat treatment
    condition
    Diameter
    d
    mm
    Minimum 0.2%-proof strength Rp0.2 in MPa at a temperature (in°C) of:
    Name Number50100150200250300350400450500550600650
    20CrMoVTiB4-101.7729+QTd≤160642624603595581573559537508464406334-

  • 符合本歐洲標(biāo)準(zhǔn)的產(chǎn)品熱處理指南

    Material designationHeat treatment
    condition
    Normalizing,quenching
    or solution annealing
    temperature
    °C
    Type of
    cooling
    Tempering or
    precipitation
    treatment (and time)
    °C
    Name Number
    20CrMoVTiB4-101.7729+QT660 to 700
    +
    970 to 990
    a

    w,o
    680 to 720
    ◎ 根據(jù)原件相關(guān)規(guī)定棠吨,如果允許矯直后消除應(yīng)力,應(yīng)選擇消除應(yīng)力的溫度盟拨,以獲得規(guī)定的性能逻盅。
    ① a=air; o=oil; w=water



  • 蠕變性能

    DesignationTemperatureStrength for
    1% (plastic)
    creep strain ①
    Creep rupture
    strength for ②
    Name Number°C10000h100000h10000h100000h200000h
    20CrMoVTiB4-101.7729450--520453(430)
    460--491423(399)
    470--463394(369)
    480--437365(338)
    490--412337(307)
    500--388307(274)
    510--364276(237)
    520--340241(198)
    530--315204(162)
    540--288169(135)
    550--261142(114)
    560--231121(96)
    570--200103-
    580--170--
    590--146--
    600--127--
    ◎ 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.


  • 松弛性能

    Material designationTemperature

    for an
    initial strain
    A total
    %
    Residual stress in N/mm2
    after stressing duration for
    Name Number1000
    h
    10000
    h
    30000
    h
    21CrMoV5-71.77094000.15247224212
    450216188173
    500180141118
    5501347042
    60061--
    ◎ 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.


20CrMoVTiB4-10 對(duì)應(yīng)不同標(biāo)準(zhǔn)
1 EN 10269-2006 規(guī)定高溫和/或低溫性能的緊固件用鋼和鎳合金
2 EN 10269-2013 規(guī)定高溫和/或低溫性能的緊固件用鋼和鎳合金
3 NF EN 10269-1999 用于高溫或低溫條件下的緊固件用鋼及鎳合金
4 DIN EN 10269-2014 規(guī)定高溫和/或低溫性能的緊固件用鋼和鎳合金
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