{"id":59205,"date":"2026-04-29T06:35:26","date_gmt":"2026-04-29T06:35:26","guid":{"rendered":"https:\/\/www.kaysuns.com\/?post_type=blog&p=59205"},"modified":"2026-04-29T06:35:28","modified_gmt":"2026-04-29T06:35:28","slug":"347-stainless-steel-flange","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/pt\/blog\/347-stainless-steel-flange\/","title":{"rendered":"347 Stainless Steel Flange"},"content":{"rendered":"
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347 Stainless Steel Flange Supplier: 347, 347H<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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\n\t\t\t\t\t\t\t\t\t347 stainless steel flange<\/strong> (UNS S34700) is a chromium-nickel stainless steel alloy that incorporates niobium (and a small amount of tantalum) to prevent intergranular corrosion within the carbide precipitation range of 800\u00b0F to 1500\u00b0F (427\u00b0C to 816\u00b0C).
\n347H stainless steel flange<\/strong> (UNS S34709) is a high-carbon version of 347 stainless steel flanges.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tDesde 2007, a Kaysuns fornece produtos personalizados flanges de a\u00e7o inoxid\u00e1vel<\/a> para setores como petr\u00f3leo e g\u00e1s, produtos qu\u00edmicos, opera\u00e7\u00f5es offshore e embarca\u00e7\u00f5es mar\u00edtimas. Entre em contato conosco para Obtenha sua cota\u00e7\u00e3o personalizada<\/a>.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"347\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Chemical Composition of 347 Stainless Steel Flange (347\/H)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tAccording to the ASTM A182 standard (Standard Specification for Forged or Rolled Alloy Stainless Steel Pipe Fittings, Flanges,and Valves),the primary difference between 347 and 347H stainless steel lies in their carbon content ranges.\n\n\n\n\n\n\n
Elemento<\/th>\nC<\/th>\nMn<\/th>\nP<\/th>\nS<\/th>\nSi<\/th>\nCr<\/th>\nNi<\/th>\nNb+Ta<\/th>\nFe<\/th>\n<\/tr>\n<\/thead>\n
347<\/td>\n\u2264 0.08<\/b><\/td>\n\u2264 2.00<\/td>\n\u2264 0.045<\/td>\n\u2264 0.030<\/td>\n\u2264 1.00<\/td>\n17.0 \u2013 19.0<\/td>\n9.0 \u2013 13.0<\/td>\n10 \u00d7 C Min \/ 1.10 Max<\/b><\/td>\nEquil\u00edbrio<\/td>\n<\/tr>\n
347H<\/td>\n0.04 - 0.10<\/b><\/td>\n\u2264 2.00<\/td>\n\u2264 0.045<\/td>\n\u2264 0.030<\/td>\n\u2264 1.00<\/td>\n17.0 \u2013 19.0<\/td>\n9.0 \u2013 13.0<\/td>\n8 \u00d7 C Min \/ 1.10 Max<\/b><\/td>\nEquil\u00edbrio<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Analysis of Key Ingredients<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Carbono:<\/strong>
The 347H grade specifies a lower minimum limit (0.04%),which ensures higher creep strength at high temperatures.
Ni\u00f3bio:<\/strong>
This is the core element of the 347 series.Niobium has a very strong affinity for carbon and preferentially forms niobium carbides,thereby preventing chromium from combining with carbon to form chromium carbides.This preserves the chromium content at the grain boundaries,preventing intergranular corrosion during welding or in high-temperature environments ranging from 427\u00b0C to 816\u00b0C.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Dual Certification (347\/347H)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tA 347\/347H dual-certified flange refers to a single product that meets the requirements of both ASTM A182 F347 and ASTM A182 F347H standards.
\nOn the Material Test Report (MTR), this flange is designated as \u201c347\/347H,\u201d indicating that it possesses both the general corrosion resistance of 347 and the high-temperature mechanical properties of 347H.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tDual certification is performed to strike a balance between inventory management and application flexibility.To qualify for dual certification,the carbon content must be between 0.04% and 0.08%,the grain size must be No.7 or coarser,and the material must undergo solution treatment in accordance with the requirements of 347H.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Tem um requisito?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\tA Kaysuns \u00e9 uma fornecedora profissional de flange de a\u00e7o inoxid\u00e1vel 316. Entre em contato comigo se tiver alguma necessidade.<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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Entre em contato conosco para obter mais informa\u00e7\u00f5es\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tContate-nos<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t
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Mechanical Properties of 347 Stainless Steel Flange Series<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tAccording to the ASTM A182 standard,the basic mechanical properties of 347 and 347H stainless steel flanges at room temperature are very similar.However,because 347H has a higher carbon content and requires a coarser grain size,it performs far better than standard 347 at extremely high temperatures.\n\n\n\n\n\n\n\n\n
M\u00e9tricas de desempenho<\/th>\n347<\/th>\n347H<\/th>\n<\/tr>\n<\/thead>\n
Resist\u00eancia \u00e0 trac\u00e7\u00e3o<\/td>\n\u2265 515 MPa (75 ksi)<\/td>\n\u2265 485 MPa (70 ksi)<\/td>\n<\/tr>\n
Resist\u00eancia ao escoamento 0,2%<\/td>\n\u2265 205 MPa (30 ksi)<\/td>\n\u2265 205 MPa (30 ksi)<\/td>\n<\/tr>\n
Alongamento em 50 mm<\/td>\n\u2265 30%<\/td>\n\u2265 30%<\/td>\n<\/tr>\n
Dureza<\/td>\n\u2264 187 HBW<\/td>\n\u2264 187 HBW<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Comparison of Maximum Allowable Stress (ASME BPVC Section II, Part D)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Temperatura<\/th>\n347 Flange (ksi)<\/th>\n347H Flange (ksi)<\/th>\nPerformance Gap<\/th>\n<\/tr>\n<\/thead>\n
1000\u00b0F \/ 538\u00b0C<\/td>\n13.5<\/td>\n14.2<\/td>\n347H is ~5% stronger<\/td>\n<\/tr>\n
1100\u00b0F \/ 593\u00b0C<\/td>\n10.1<\/td>\n13.2<\/td>\n347H is ~30% stronger<\/td>\n<\/tr>\n
1200\u00b0F \/ 649\u00b0C<\/td>\n6.4<\/td>\n10.5<\/td>\n347H is ~64% stronger<\/td>\n<\/tr>\n
1300\u00b0F \/ 704\u00b0C<\/td>\n3.5<\/td>\n6.5<\/td>\n347H is ~85% stronger<\/td>\n<\/tr>\n
1400\u00b0F \/ 760\u00b0C<\/td>\n1.8<\/td>\n3.8<\/td>\n347H is ~110% stronger<\/td>\n<\/tr>\n
1500\u00b0F \/ 816\u00b0C<\/td>\n0.9<\/td>\n1.9<\/td>\n347H is ~111% stronger<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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4 Manufacturing Methods for 347 Stainless Steel Flange<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Forjamento<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tForging is performed in accordance with the ASTM A182 standard.The forging process eliminates defects such as porosity that arise during smelting and optimizes the microstructure.It is the most commonly used method for manufacturing high-quality 347\/347H flanges.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Corte e usinagem de chapas<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tSteel plate cutting and machining are commonly used to manufacture slip-on flanges or blind flanges.Circular blanks are cut directly from hot-rolled and annealed 347\/347H stainless steel plates using plasma,laser,or waterjet cutting,and then precision-machined on CNC lathes.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Fundi\u00e7\u00e3o centr\u00edfuga<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tCentrifugal casting offers cost advantages in the production of large-diameter 347 series flanges.The castings have a dense microstructure and can be used to produce large-sized,annular components with uniform wall thickness.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Seamless Rolled Ring Forging<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tRing rolling is an advanced forging process specifically designed for manufacturing circular flanges.Because the metal fibers are continuously distributed in the circumferential direction,flanges produced using this method exhibit excellent impact resistance and fatigue life.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Applications of 347 Stainless Steel Flange (347\/H)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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347 Stainless Steel Flange<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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