BS ISO 3651-3:2017规定了低Cr的晶间腐蚀敏感性的测定[1] 小于16%Cr，小于0.3%Ni，小于0.3%Ti，小于0.3%Nb，小于0.3%（Ti+原子） 0.5%硫酸/硫酸铜试验中的重量比（Nb）]铁素体不锈钢。它还规定 可能分配给测试的目的。该方法适用于以轧制板材和焊管形式供应的不锈钢，以及 用于轻度氧化性酸性介质中。需要注意的是，腐蚀试验的结果仅对腐蚀性介质严格有效 在测试中使用。它构成了估算抗晶间腐蚀性的基础，但不能 用于检查对其他形式腐蚀（一般腐蚀、点蚀、应力腐蚀、， 等等）。对于用户来说，在使用钢材的地方进行规定的腐蚀试验是很重要的。这个测试是， 在任何情况下，都不能被视为金属质量的绝对标准。交叉引用:ISO 8044:2015 ASTM A763-15ISO 3651-2:1998购买本文件时，所有当前可用的修订版均包含在购买本文件中。

BS ISO 3651-3:2017 specifies the determination of the intergranular corrosion susceptibility of low-Cr [less than 16 % Cr, less than 0,3 % Ni, less than 0,3 % Ti and less than 0,3 % Nb, less than 0,3 % (Ti + Atomic weight ratio Nb)] ferritic stainless steels in the 0,5 % sulfuric acid/copper sulfate test. It also specifies the purposes which may be assigned to the test.The method is applicable to stainless steels supplied in the form of rolled sheets and welded tubes and intended for use in a mildly oxidizing acid medium.It is important to note that the result of the corrosion test is only strictly valid for the corrosive medium used in the test. It constitutes a basis for estimating the resistance to intergranular corrosion but cannot be used to check resistance to other forms of corrosion (general corrosion, pitting, stress corrosion, etc.). It is important for the user to adapt the specified corrosion test where steels are used. This test is, in no case, considered as an absolute criterion of the quality of the metal.Cross References:ISO 8044:2015 ASTM A763 - 15ISO 3651-2:1998All current amendments available at time of purchase are included with the purchase of this document.