May I ask whether the 16Cr20Ni14Si2 material should be Fe-8-1 or Fe-8-2?
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I would like to ask whether the 16Cr20Ni14Si2 material should be Fe-8-1 or Fe-8-2. I hope someone can answer it. Can't be found in NB/T47014.
I hope someone can help me explain it.
16Cr20Ni14Si2 austenitic grade stainless steel implementation standards: GB/T 1221-199216Cr20Ni14Si2 has high high temperature strength and oxidation resistance, is sensitive to sulfur-containing atmosphere, and has a tendency to embrittle at 600°C to 800°C. It is suitable for making furnace components. Chemical composition of 16Cr20Ni14Si2: Carbon C : ≤0.20 Silicon Si: 1.50～2.50Mn: ≤1.50 sulfur S : ≤0.030 Phosphorus P : ≤0.035 ChromiumCr: 19.00～22.00 NickelNi: 12.00～15.0016Cr20Ni14Si2 mechanical properties: Tensile strengthσb(MPa): ≥590 condition yield strength σ0.2 (MPa): ≥295 elongation δ5: ≥35 Area shrinkage ψ: ≥50 hardness: ≤187HB
Well, I mainly want to know whether its group is Fe-8-1 or Fe-8-2, because it involves process evaluation issues. If it is Fe-8-1, it can be covered by the existing process assessment. If it is Fe-8-2, a new process assessment will be required.
Its material is similar to 2520, and it is recommended to use Fe-8-2. personal opinion
This post was last edited by zjq1962 on 2019-6-28 08:52 NB/T47014’s provisions for material levels refer to the ASME standard. In ASME Volume IX, S30908 (309S, equivalent to domestic 16Cr20Ni14si2 ) is classified into the Fe-8-2 group. It can be concluded that if it is to be grouped, this material should also be classified into Fe-8-2.