欢迎词英文宝钢双相不锈钢B2205
（Plate sheet and coil for duplex Stainless Steel B2205）
---------------------------------------------------------------------------------------------------------------------------------1、B2205概述Brief introduction of B2205
双相不锈钢B2205是由奥氏体和铁素体两相组成的双相不锈钢，具有优良的耐腐蚀性能和力学性能，其屈服强度是300系列不锈钢的两倍，被广泛应用于油气、石化、桥梁、海水淡化以及化学品船等行业。
Duplex stainless steel B2205is characterized by a ferrite-austenite microstructure,which leads to a good combination of corrosion resistance and mechanical properties.The yield strength of B2205is nearly twice as that of300ries stainless steel.B2205is widely ud in industry such as oil and gas, petrochemical,bridge,a water desalinization,chemical cargo ship and so on.
图1双相不锈钢B2205典型组织
Figure1Typical microstructure of B2205
2、相关标准Related standards
●GB2437-2007022Cr22Ni5Mo3N、022Cr23Ni5Mo3N；
GB24511-2009S22253，S22053
rubberduck●UNS S31803，S32205
●EN 1.4462
3、化学成分Chemical composition
表1B2205化学成分
Table1Chemical Composition of B2205
牌号Steel grade
厦门电脑
标准号
International Standards
化学成分，wt％，典型值
Chemical composition,wt%,Typical values
C N Cr Ni Mo
B2205S318030.020.1621.5 5.3 2.8 S322050.020.1722 5.5 3.1
4、力学性能Mechanical properties
表2B2205退火态力学性能墨尔本大学排名
Table2Mechanical properties of B2205in solution annealed state
牌号厚度（mm）
Thickness
力学性能典型值（Typical Mechanical Properties）
屈服强度(MPa)
Yield Strength
R p0.2
抗拉强度(MPa)
Tensile Strength
Rm
延伸率(%)
Elongation
硬度(HV)
Hardness
B2205P(15mm)55076846225 H(4mm)57081530230 C(0.6mm)62388930250
表3B2205退火态高温力学性能
Table3Mechanical properties at high temperature of B2205for solution annealed product 温度(℃)
最小值（Minimum values)典型值(Typical values) R0.2(MPa)Rm(MPa)EL(%)R0.2(MPa)Rm(MPa)EL(%) 1003706302545371737 1503456002543368335 2003305802240566532 2503205702039565829 3003105602037365528
50100150200
250300-200
-150-100-50050
Temperature(℃)
A k v (J )
图2不同温度下B2205的冲击功（试样尺寸10×10mm ，Charpy-V ）
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Figure 2Typical impact strength at different temperature (Specimen size:10×10mm ，Charpy-V)
5、耐腐蚀性能Corrosion resistance
5.1耐点腐蚀性能Pitting corrosion resistance
图3按照ASTM G150测试获得的B2205临界点蚀温度（CPT ）
Figure 3Critical pitting temperature (CPT)of B2205measured according ASTM G150
表4按照ASTM A92306C 测试获得的B2205点腐蚀速率Table 4Pitting corrosion rate of B2205according ASTM A92306C
试验温度（℃）Testing temperature
试验时间（h ）Testing time
腐蚀率（mg/dm 2.day ）
Corrosion rate
B2205
25±1
24
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5.2耐应力腐蚀性能Stress corrosion resistance
对B2205钢板进行抗硫化物应力腐蚀开裂恒负荷拉伸试验，试验按照标准GB/T4157-2006进行，同时参照美国腐蚀工程师协会NACE TM0177-1996。
Stress corrosion cracking test for B2205against sulfide under constant loading tensile is carried out in the light of GB/T4157-2006,which is referred to NACE TM0177-1996.
表5B2205耐应力腐蚀性能
Table5Stress corrosion resistance of B2205
试验标准Test standard 载荷(KN)
Stress
浸泡时间(h)
Time
断否
Cracking or not
评定
Evaluation
GB/T4157-20060.8R P0.2720hours否(No)
合格(Qualified)
5.3耐晶间腐蚀试验Inergranular corrosion resistance
表6按照GB/T4334.3-2000测试获得的B2205耐晶间腐蚀性能Table6Inergranular corrosion resistance of B2205measured according GB/T4334.3-2000
B2205
loca
时间（小时）
Time(hour)
是否发生晶间腐蚀48(h)96(h)144(h)
否(No)网站培训
腐蚀率（g/m2•h）
Corrosion rate
0.3850.1240.120
6、热处理Heat treatment
双相不锈钢B2205的固溶处理温度为1020～1100℃，处理后需要进行快速冷却，以保持恰当的两相比例并避免有害金属间化合物的析出。
B2205is solution annealed at1020～1100℃.Rapid cooling is recommended after the annealing to ensure proper pha proportion and avoid precipitation of detrimental intermetallic phas.
7、冷成形Cold forming
双相不锈钢B2205退火态的初始强度较高，冷加工中需要提供大于奥氏体不锈钢的变形力。
Due to the high proof strength of B2205,greater working forces than tho required for austenitic steel are usually needed for cold forming of duplex steel.
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图4双相不锈钢B2205的冷加工性能
Figure4Mechanical Properties of B2205after cold working
