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ASME B31.3-2016 Table 323.3.5 Minimum Required Charpy V-Notch Impact Values Energy [Note(2)] Fully Deoxidized Other Than Fully Specified Minimum No. of Specimens Steels Deoxidized Steels Tensile Strength [Note(1)] Joules ft-lbf Joules ft-lbf (a) Carbon and Low Alloy Steels 448 MPa (65 ksi) and less Average for 3 specimens 18 13 14 10 Minimum for 1 specimen 14 10 10 7 Over 448 to 517 MPa (75 ksi) Average for 3 specimens 20 15 18 13 Minimum for 1 specimen 16 12 14 10 Over 517 but not incl. 656 MPa (95 ksi) Average for 3 specimens 27 20 ... ... Minimum for 1 specimen 20 15 ... ... Lateral Expansion 656 MPa and over[Note (3)] Minimum for 3 specimens 0.38 mm (0.015 in.) (b) Steels in P-Nos. 6, 7,and 8 Minimum for 3 specimens 0.38 mm (0.015 in.) NOTES: (1) See para. 323.3.5(d) for permissible retests. (2) Energy values in this Table are for standard size specimens. For subsize specimens,these values shall be multiplied by the ratio of the actual specimen width to that of a full-size specimen, 10 mm (0.394 in.). (3) For bolting of this strength level in nominal sizes M 52 (2 in.) and under, the impact requirements of ASTM A320 may be applied. For bolting over M 52, requirements of this Table shall apply. 323.4 Fluid Service Requirements for Materials (1) Gray iron shall not be used above ground within 323.4.1 General. Requirements in para.323.4 apply process uit fluid service amitytemperaturesinhydrocarbon y carbove other f er(flammable nor to pressure-containing parts.They do not apply to mate- at gage pressures above 1035 kPa (150 psi). In other rials used for supports,gaskets,packing,or bolting.See locations the pressure limit shall be 2 760 kPa (400 psi). also Appendix F, para. F323.4. (2) Malleable iron shall not be used in any fluid 323.4.2 Specific Requirements service at temperatures below —29°C (-20°F) or above (a) Ductile Iron. Ductile iron shall not be used for pres- 343°C (650°F) and shall not be used in flammable fluid sure containing parts at temperatures below —29°C service at temperatures above 149°C (300°F)nor at gage (-20°F) (except austenitic ductile iron) or above 343°C pressures above 2 760 kPa (400 psi). (650°F). Austenitic ductile iron conforming to (3) High silicon iron(14.5%Si)shall not be used in ASTM A571 may be used at temperatures below—29°C flammable fluid service. The manufacturer should be (-20°F)down to the temperature of the impact test con- consulted for pressure—temperature ratings and for pre- ducted in accordance with that specification but not cautionary measures when using this material. below —196°C (-320°F). (c) Other Materials Valves having bodies and bonnets or covers made of (1) If welding or thermal cutting is performed on materials conforming to ASTM A395 and meeting the aluminum castings,the stress values in Appendix A and requirements of ASME B16.42 and additional require- component ratings listed in Table 326.1 are not applica- ments of ASME B16.34 Standard Class,API 594,API 599, ble. It is the designer's responsibility to establish such or API 609 may be used within the pressure—temperature stresses and ratings consistent with the requirements of ratings given in ASME B16.42. this Code. Welding shall not be performed in the fabrication or (2) bead and tin and their alloys shall not be used repair of ductile iron components nor in assembly of in flammable fluid services. such components in a piping system. (b) Other Cast Irons. The following shall not be used 323.4.3 Cladding and Lining Materials. Materials under severe cyclic conditions. If safeguarding is pro- with metallic cladding or metallic lining may be used vided against excessive heat and thermal shock and in accordance with the following provisions: mechanical shock and abuse,they may be used in other (a) If piping components are made from integrally services subject to the following requirements. clad plate conforming to