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牌号 X2CrNiMoN18-12-4
1.4434
對應标準 NF EN 10028-7-2000
壓力容器用不鏽鋼扁平產品
Flat products made of steels for pressure purposes Part 7: Stainless steels
歸類 奧氏體不鏽鋼
标簽 特殊等級
X2CrNiMoN18-12-4 化學元素成分含量(%)
成分 C Si Mn P S Cr Ni Mo N
最小值 - - - - - 16.5 10.5 3 0.1
最大值 0.03 1 2 0.045 0.015 19.5 14 4 0.2
◎ 未經買方同意,不得随意向鋼中添加表中未列的元素,冶煉精加工除外。采取一切必要措施以防在廢鋼和生產原料中帶入這些元素,因為其會削弱鋼的機械性能,降低鋼的适用性。
X2CrNiMoN18-12-4 機械性能
條件 熱處理或狀态
抗拉強度
σb
Mpa
屈服點
σs
Mpa
斷後伸長率或延伸率
δ
%
沖擊吸收能量
KV2
J
C:T ≤ 6 +AT 570~770 Rp0.2:≥290
Rp1.0:≥320
①②
T < 3mm: ≥35
T ≥ 3mm: ≥ 35
②③
20℃:
(l: ≥100;t: ≥60)
-196℃:
(t: ≥60)
H:T ≤ 12 +AT 570~770 Rp0.2:≥270
Rp1.0:≥310
①②
T < 3mm: ≥35
T ≥ 3mm: ≥ 35
②③
20℃:
(l: ≥100;t: ≥60)
-196℃:
(t: ≥60)
P:T ≤ 75 +AT 540~740 Rp0.2:≥270
Rp1.0:≥310
①②
T < 3mm: ≥40
T ≥ 3mm: ≥ 40
②③
20℃:
(l: ≥100;t: ≥60)
-196℃:
(t: ≥60)
◎C- 冷軋帶鋼; H- 熱軋帶鋼; P- 熱軋中厚闆;T- 厚度;t- 橫向;l-縱向。
◎+A=軟化退火;+AT=固溶退火;+QT=淬火及回火;+RA=再結晶退火。
◎ 如果熱加工和随後冷卻的條件符合ENISO3651-2中對產品機械性能和抗晶間腐蝕性的要求,則可以省略固溶處理。
*抗晶間腐蝕根據EN ISO 3651-2進行測試。在交貨條件下:有;在緻敏狀态下:有。
① 對于連續熱軋產品,可在詢價和訂購時商定Rp0.2(即表中σs)的最小值提高20MPa,Rp1.0的最小值提高10MPa。
② 如果在軋制寬度<300mm的帶材情況下,采用縱向試驗件,最小值減小如下:屈服強度-15MPa,恒定标距的延伸率-5%,比例标距延伸率-2%。
③ T<3mm:該值适用于标距為80mm、寬度為20mm的試件,也可以使用标距為50mm、寬度為12.5mm的試件。T ≥3mm:該值适用于标距為5.65√S的試件。

  • 高溫下的最小屈服強度

    Material designationHeat treatment
    condition
    Minimum 0.2% proof strength Rp0.2,MPa
    at a temperature (in°C) of:
    Name Number100150200250300350400450500550600
    X2CrNiMoN18-12-4 1.4434+AT211185167155145140135131129127-
    Minimum 1.0% proof strength Rp1.0,MPa
    at a temperature (in°C) of:
    100150200250300350400450500550600
    246218198183175169164160158157-

  • 高溫下的最小抗拉強度

    Material designationMinimum tensile strength Rm,MPa
    at a temperature (in°C) of:
    Name Number100150200250300350400450500550600
    X2CrNiMoN18-12-41.4434500470440430420415415415410390-

  • 熱處理指南

    Material designationHot formingHeat
    treatment
    symbol
     Solution anneailing
    ①②
    Post weld heat 
    treatment
    steels with ≤ 0.03% C
    Name NumberTemperature
    Type of
    cooling
    Temperature
    ℃ ③④
    Type of
    cooling
    Temperature
    ℃ ⑥
    Type of
    cooling
    X2CrNiMoN18-12-41.44341150 to 850air+AT1070 to 1150water,air ⑤960 to 1040 ⑦forced air 
    ◎ a=air; o=oil; w=water.
    ◎ Scale and annealing colours produced during hot forming, heat treatment or welding may adversely affect the corrosion resistance. They should be removed as far as possible before use, e.g. by pickling.
    ◎ The temperatures of annealing should be agreed for simulated heat treated test pieces.
    ① The solution treatment may be omitted if the conditions for hot working and subsequent cooling are such that the requirements for the mechanical properties of the product and the resistance to intergranular corrosion as defined in EN ISO 3651-2 are obtained and provided these requirements are met even after appropriate subsequent solution annealing.
    ② Re-crystallizing annealing.
    ③ If heat treatment is carried out in a continuous furnace, the upper part of the range specified is usually preferred, or even exceeded.
    ④ The lower end of the range specified for solution annealing should be aimed at for heat treatment as part of further processing,because otherwise the mechanical properties might be affected. If the temperature of hot forming does not drop below the lower temperature for solution annealing.a temperature of 980℃ is adequate as a lower limit for Mo-free steels,a temperature of 1000℃ for steels with Mo contents up to 3% and a temperature of 1020℃ for steets with Mo contents exceeding 3%.
    ⑤ cooling sufficiently rapid.

    ⑥ Minimum holding time:30min.

    ⑦ Not recommended if welded with stabilized filler medal.

近似對照表 奧氏體不鏽鋼
中國 中國台灣 日本 韓國 美國 國際标準組織 德國 法國 歐标
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN 數字牌号
022Cr19Ni13Mo4N S31753 317LN SUS 317LN STS 317LN 317LN S31753 X2CrNiMoN 18-12-4 X2CrNiMoN 18-12-4 1.4434 X2CrNiMoN 18-12-4 X2CrNiMoN 18-12-4 1.4434
X2CrNiMoN18-12-4 對應不同标準
1 EN 10088-1-2005 不鏽鋼 第1部分:不鏽鋼的清單
2 ISO TS 15510-2003 技術規範 不鏽鋼-化學成分
3 ISO 15510-2014 技術規範 不鏽鋼-化學成分
4 ISO 9328-7-2018 不鏽鋼承壓扁鋼制品
5 NF EN 10088-2-2005 普通用途不鏽鋼闆和鋼帶的交貨技術條件
6 NF EN 10088-1-2005 不鏽鋼 - 第1部分:不鏽鋼清單
7 NF EN 10028-7-2008 壓力容器用不鏽鋼扁平產品
8 NF EN 10028-7-2000 壓力容器用不鏽鋼扁平產品
注:數據僅供參考!如有疑問,請填寫"我要糾錯"!
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