B16 Case 4 13 Cr Stainless Steel ASME B16.5 and ASME B16.47 Flanges ASTM A182 F6a Class 1, A182 F6a Class 2, and A217 CA15 Material

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1 CASES OF THE B16 VALVE, FLANGES, FITTINGS AND GASKETS STANDARDS Approval Date: May 27, 2016 Cases will remain available for use until annulled by the applicable Standards Committee B16 Case 4 13 Cr Stainless Steel ASME B16.5 and ASME B16.47 Flanges ASTM, Class 2, and A217 CA15 Material Inquiry: May ASTM and Class 2 forgings (UNS S41000) and ASTM A217 CA15 castings (UNS J91150) conforming to the chemical requirements shown in Tables 1A and 1B, the mechanical properties listed in Tables 2A and 2B, and otherwise conforming to the applicable requirements in the specifications listed in Table 3 and in this Case be used for the construction of B16.5 and B16.47 flanges? Reply: It is the opinion of the Committee that the material described in the inquiry may be used with the applicable requirements of ASME B16.5 and ASME B16.47 for the construction of flanges, provided the following additional requirements are met. (a) The pressure temperature ratings shall be in accordance with Tables 4A (metric bar units) and 4B (U.S. Customary psig units) as developed in accordance with ASME B16.5, Appendix A. (b) Service temperatures for Class 2 and A217 CA15 materials shall not exceed 650 C (1200 F). Service temperature for shall not exceed 538ºC (1000ºF). (c) 50 flanges shall be limited to 538ºC (1000ºF) service as noted in Tables 4A and 4B. (d) The material described in the inquiry (martensitic stainless steel) shall be considered a Material Group 2 material for B16.5 and B16.47 applications. (e) This Case number shall be included in the marking of the flange and including on the Material Test Report. 1

2 Table 1A Chemical Requirements ASTM and Class 2 Element Chemical Composition Limits, % max. Carbon 0.15 Manganese 1.00 Phosphorous Sulfur Silicon 1.00 Nickel 0.50 Chromium Molybdenum Columbium Titanium Other Elements Table 1B Chemical Requirements ASTM A217 CA15 Element Chemical Composition Limits, % max. Carbon 0.15 Manganese 1.00 Phosphorous Sulfur Silicon 1.50 Nickel Chromium Molybdenum 0.50 Columbium Titanium Vanadium 2

3 A182 F6a A217 CA15 Table 2A Mechanical Property Requirements Metric Units A217 CA15 Stress A217 CA15 Stress Temp C to (2) (1) NOTE: (1) stresses for temperatures of 480 C and above are values obtained from time-dependent properties. (2) stresses for temperatures of 455 C and above are values obtained from time-dependent properties. 3

4 A182 F6a Class 2 Table 2A continued Mechanical Property Requirements Metric Units Class 2 Class 2 Stress Temp C to (1) NOTE: (1) stresses for temperatures of 455 C and above are values obtained from time-dependent properties. 4

5 A182 F6a Class 2 Class 2 Table 2B Mechanical Property Requirements U.S. Customary Units Class 2 A217 CA15 A217 CA15 A182 CA15 Temp F -20 to (1) (1) NOTE: (1) stresses for temperatures of 850 F and above are values obtained from time-dependent properties. 5

6 Table 2B continued Mechanical Property Requirements U.S. Customary Units A182 F6a Temp F -20 to (1) NOTE: (1) stresses for temperatures of 900 F and above are values obtained from time-dependent properties. Forgings Castings Table 3 Specification ASTM A182/A182M ASTM A217/A217M 6

7 Table 4A (Metric) Pressure-Temperature Ratings for Group 2 Materials Nominal Designation Forgings Castings Plates 13Cr A182 Gr. F6a (1) A217 CA A182 Gr. 6a Class 2 Temperature C Working Pressures by Classes, bar Class to (2) NOTES: (1) Not to be used over 538 C. (2) 50 flange ratings terminate at 538 C. 7

8 Table 4B (U.S. Customary) - Pressure-Temperature Ratings for Group 2 Materials Nominal Designation Forgings Castings Plates 13Cr A182 Gr. F6a (1) A217 CA A182 Gr. F6a Class 2 Temperature F Working Pressures by Classes, psig Class to (2) NOTES: (1) Not to be used over 1000 F. (2) 50 flange ratings terminate at 1000 F. 8