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牌號(hào) X2CrNiN18-7
1.4318
對(duì)應(yīng)標(biāo)準(zhǔn) NF EN 10028-7-2000
壓力容器用不銹鋼扁平產(chǎn)品
Flat products made of steels for pressure purposes Part 7: Stainless steels
歸類 奧氏體不銹鋼
標(biāo)簽 標(biāo)準(zhǔn)等級(jí)
X2CrNiN18-7 化學(xué)元素成分含量(%)
成分 C Si Mn P S Cr Ni N
最小值 - - - - - 16.5 6 0.1
最大值 0.03 1 2 0.045 0.015 18.5 8 0.2
◎ 未經(jīng)買方同意，不得隨意向鋼中添加表中未列的元素虽惭，冶煉精加工除外。采取一切必要措施以防在廢鋼和生產(chǎn)原料中帶入這些元素桥滨，因?yàn)槠鋾?huì)削弱鋼的機(jī)械性能，降低鋼的適用性弛车。
X2CrNiN18-7 機(jī)械性能
條件 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
% 		沖擊吸收能量
KV2
J
C：T ≤ 6 +AT 650~850 Rp0.2：≥350
Rp1.0：≥380
①②		 T ＜ 3mm: ≥35
T ≥ 3mm: ≥ 40
②③		 20℃：
(l: ≥90齐媒；t: ≥60)
H：T ≤ 12 +AT 650~850 Rp0.2：≥330
Rp1.0：≥370
①②		 T ＜ 3mm: ≥35
T ≥ 3mm: ≥ 40
②③		 20℃：
(l: ≥90；t: ≥60)
P：T ≤ 75 +AT 650~850 Rp0.2：≥330
Rp1.0：≥370
①②		 T ＜ 3mm: ≥35
T ≥ 3mm: ≥ 40
②③		 20℃：
(l: ≥90纷跛；t: ≥60)
◎C- 冷軋帶鋼; H- 熱軋帶鋼; P- 熱軋中厚板里初；T- 厚度；t- 橫向忽舟；l-縱向。
◎+A=軟化退火淮阐；+AT=固溶退火叮阅；+QT=淬火及回火；+RA=再結(jié)晶退火。
◎ 如果熱加工和隨后冷卻的條件符合ENISO3651-2中對(duì)產(chǎn)品機(jī)械性能和抗晶間腐蝕性的要求浩姥，則可以省略固溶處理凡宅。
*抗晶間腐蝕根據(jù)EN ISO 3651-2進(jìn)行測(cè)試。在交貨條件下：有簸眼；在致敏狀態(tài)下：有钓闲。
① 對(duì)于連續(xù)熱軋產(chǎn)品，可在詢價(jià)和訂購(gòu)時(shí)商定Rp0.2(即表中σs)的最小值提高20MPa疤削，Rp1.0的最小值提高10MPa拉盘。
② 如果在軋制寬度<300mm的帶材情況下，采用縱向試驗(yàn)件撬彭，最小值減小如下:屈服強(qiáng)度-15MPa当糯，恒定標(biāo)距的延伸率-5%，比例標(biāo)距延伸率-2%据钱。
③ T＜3mm：該值適用于標(biāo)距為80mm捧练、寬度為20mm的試件，也可以使用標(biāo)距為50mm箭谴、寬度為12.5mm的試件风居。T ≥3mm：該值適用于標(biāo)距為5.65√S的試件。

  • 高溫下的最小屈服強(qiáng)度

    Material designationHeat treatment
    condition    		Minimum 0.2% proof strength Rp0.2,MPa
    at a temperature (in°C) of:
    Name Number100150200250300350400450500550600
    X2CrNiN18-71.4318+AT265200185180170165-----
    Minimum 1.0% proof strength Rp1.0,MPa
    at a temperature (in°C) of:
    100150200250300350400450500550600
    300235215210200195-----
    ① Determined by linear interpolation.

  • 高溫下的最小抗拉強(qiáng)度

    Material designationMinimum tensile strength Rm,MPa
    at a temperature (in°C) of:
    Name Number100150200250300350400450500550600
    X2CrNiN18-71.4318530490460450440430-----

  • 熱處理指南

    Material designationHot formingHeat
    treatment
    symbol    		 Solution anneailing
    ①②    		Post weld heat 
    treatment
    Steel with ≤ 0.03% C
    Name NumberTemperature
    ℃    		Type of
    cooling    		Temperature
    ℃ ③④    		Type of
    cooling    		Temperature
    ℃ ⑥    		Type of
    cooling
    X2CrNiN18-71.43181150 to 850air+AT1020 to 1100water,air ⑤900 to 940air 
    ◎ 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.


X2CrNiN18-7 對(duì)應(yīng)不同標(biāo)準(zhǔn)
1 EN 10088-1-2005 不銹鋼 第1部分:不銹鋼的清單
2 EN 10296-2-2005 機(jī)械工程和一般工程用焊接圓鋼管.交貨技術(shù)條件.第2部分:不銹鋼
3 ISO TS 15510-2003 技術(shù)規(guī)范 不銹鋼-化學(xué)成分
4 ISO 15510-2014 技術(shù)規(guī)范 不銹鋼-化學(xué)成分
5 ISO 9328-7-2018 不銹鋼承壓扁鋼制品
6 NF EN 10088-2-2005 普通用途不銹鋼板和鋼帶的交貨技術(shù)條件
7 NF EN 10088-1-2005 不銹鋼 - 第1部分：不銹鋼清單
8 NF EN 10028-7-2008 壓力容器用不銹鋼扁平產(chǎn)品
9 NF EN 10296-2-2005 機(jī)械和一般工程用焊接圓鋼管-交貨技術(shù)條件-第2部分:不銹鋼管
10 NF EN 10028-7-2000 壓力容器用不銹鋼扁平產(chǎn)品
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