Inconel 617 / Alloy 617 (tambien UNS N06617, W.Nr. 2.4663, NiCr22Co12Mo9, GH617/GH4153) es una superaleacion de niquel-cromo-cobalto-molibdeno de endurecimiento por solucion solida — no por precipitacion — con una excepcional estabilidad metalurgica, resistencia a la fluencia lenta y resistencia a la oxidacion a temperaturas extremas. Es el unico material de solucion solida comercialmente disponible que mantiene valores practicos de resistencia a la fluencia hasta 1100 C (largo plazo) y 1200 C (corto plazo), gracias a la combinacion unica de Co 10-15% + Mo 8-10% + Al ~1.2% que forma una capa protectora de Cr2O3-Al2O3. En SHUNFU METAL fabricamos esta aleacion segun AMS 5887/5888/5889, ASTM B166/B168/B167/B564 y EN 10095, mediante fusion al vacio (VIM) con analisis OES por colada bajo el sistema de calidad ISO 9001 y los estandares del programa API Q1. Su composicion tipica Ni~53Cr~22Co~12Mo~9Al~1.2 le confiere una resistencia a la fluencia en 1000 C/1000 h de ~55 MPa, superando ampliamente a Inconel 625 (~980 C limite practico) y Hastelloy X (menor resistencia por encima de 900 C).

Grados Equivalentes de Inconel 617 (N06617)

Norma / Pais Designacion
EE.UU. (UNS) N06617
EE.UU. — Comerciales Inconel 617, Alloy 617, Haynes 617, Nicrofer 617, Nickelvac 617
Alemania / EU (W.Nr. / DIN EN) 2.4663; NiCr23Co12Mo, NiCr22Co12Mo9 (ISO 9722)
China (GB/T, GJB) GH617 (GH3617, GH4153) — GB/T 14992; NS3106
Reino Unido (BS) BS 3072 NA18
Rusia (GOST) ЭП617 (equivalente funcional mas cercano)
Japon (JIS) Sin equivalente JIS directo — se referencia UNS N06617
Estandares aeroespaciales / industriales AMS 5887, 5888, 5889, 5899; VdTÜV 485; ASME Code Case 2601

Nota sobre la designacion china: GH4153 es una designacion mas reciente en el sistema chino para Inconel 617, mientras que GH617/GH3617 es la mas ampliamente referenciada en GB/T 14992. La designacion NS3106 agrupa aleaciones Ni-Cr de solucion solida. No existe un equivalente GOST directo; ЭП617 es la referencia funcional mas cercana. SHUNFU METAL produce segun las especificaciones occidentales AMS y ASTM, con certificacion ISO 9001 y API Q1.

Chapa, barra y tubo Inconel 617 N06617 SHUNFU METAL
Inconel 617 | SHUNFU METAL

Aplicaciones de Inconel 617 (N06617)

Turbinas de Gas & Aviacion

Camaras de combustion (combustion cans), ductos de transicion, revestimientos de postcombustion, toberas de escape y sellos de turbina en motores aeronauticos y turbinas de gas industriales de 50-500 MW. Inconel 617 soporta temperaturas de combustion de hasta 1100 C con resistencia a la fatiga termica bajo ciclos repetidos de encendido/apagado.

Centrales Electricas USC & Nuclear

Tubos de sobrecalentador y recalentador en centrales ultra-supercriticas (USC) con vapor a 700-760 C (ASME Code Case 2601). Intercambiadores de calor y componentes de generador de vapor en reactores nucleares de alta temperatura refrigerados por gas (HTGR/VHTR), con estabilidad en helio con impurezas de H2/CO.

Petroquimica & Procesado Quimico

Tubos de horno de craqueo de etileno (secciones de conveccion y radiante), tubos de reformado de amoniaco, intercambiadores de linea de transferencia y componentes de gasificacion. Resiste corrosion por H2S a 400-600 C en unidades de hidrocraqueo, superando al acero inoxidable 310S en vida util de 1 a 5 anos.

Hornos Industriales & Tratamiento Termico

Tubos radiantes, muflas, retortas, rodillos de horno, bandejas de sinterizacion y pantallas de aislamiento de horno de vacio. Excelente resistencia a la carburizacion, nitruracion y oxidacion ciclica hasta 1150 C en atmosferas de combustion que contienen azufre y vanadio.

Energia Solar & Nuevas Energias

Tubos de transferencia de calor en receptores solares de sales fundidas (565 C) para plantas de concentracion solar (CSP), con vida util de diseno superior a 25 anos. Componentes de turbina de CO2 supercritico (700 C/25 MPa) y sistemas de refrigeracion de reactor de fusion.

Instrumentacion & Componentes Especiales

Vainas de proteccion de termopares para medicion de temperatura superior a 1000 C en metales fundidos y gases calientes. Soportes de catalizador en produccion de acido nitrico (resistencia a nitruracion) y componentes estructurales de horno con requisitos combinados de alta temperatura y carga mecanica.

Productos y Capacidades de Suministro — SHUNFU METAL

Chapa, Fleje y Banda (AMS 5888)

Chapa laminada en caliente (3.0-120 mm) y laminada en frio (0.25-3.0 mm) segun ASTM B168 / ASME SB-168 y AMS 5888/5889. Ancho maximo 2500 mm. Estado de suministro: recocido de solubilizacion 1150-1200 C + enfriamiento rapido. Aplicaciones tipicas: camaras de combustion, pantallas termicas, piezas conformadas en caliente. Inventario permanente en SHUNFU METAL.

Barra, Alambron y Forja (AMS 5887)

Barra laminada en caliente y forjada de 8-350 mm de diametro segun ASTM B166 / ASME SB-166 y AMS 5887/5899. Alambron y alambre desde 1.0 mm. Estado de suministro: recocido de solubilizacion (Rm ≥690 MPa, A ≥30%). Aplicaciones tipicas: ejes de turbina, rodillos de horno, fijaciones de alta temperatura.

Tubo Sin Soldadura y Soldado

Tubo sin soldadura segun ASTM B167/B829 / ASME SB-167 y AMS 5889, diametro exterior 6-325 mm, espesor 0.5-50 mm. Tubo soldado segun ASTM B546/B619. Aplicaciones: intercambiadores de calor HTGR, tubos de craqueo de etileno, tubos radiantes de horno. SHUNFU METAL suministra tubos con prueba hidrostatica y END 100%.

Forjas, Anillos, Bridas y Consumibles de Soldadura

Forjas y anillos segun ASTM B564 / ASME SB-564 y AMS 5887, peso unitario hasta 5000 kg. Bridas y accesorios segun ASME B16.5/B16.47. Consumibles de soldadura: alambre ERNiCrCoMo-1 (AWS A5.14 / AMS 5800) y electrodo ENiCrCoMo-1 (AWS A5.11) para uniones soldadas con identica resistencia a la corrosion y al creep que el metal base.

Composicion Quimica de Inconel 617 (N06617)

Elemento Min (%) Max (%) Funcion Clave
Ni 44.5 Matriz austenitica — resistencia a corrosion y ductilidad
Cr 20 24 Forma Cr2O3 protectora — resistencia a la oxidacion hasta 1100 C
Co 10 15 Refuerzo por solucion solida — eleva la resistencia a la fluencia a > 1000 C sin degradacion temporal
Mo 8 10 Refuerzo solucion solida + resistencia a corrosion por acidos reductores
Al 0.8 1.5 Forma Al2O3 subsuperficial — sinergia Cr+Al para oxidacion ciclica sin descascarillado
Fe 3.0 Elemento residual — control estricto para mantener la estabilidad de la matriz Ni-Co
C 0.05 0.15 Forma carburos M23C6/M6C en borde de grano — anclaje contra deslizamiento a alta temperatura
Ti 0.6 Estabilizador de carburos — forma Ti(C,N) primarios que ayudan a controlar el tamano de grano
Mn 1.0 Desoxidante de fusion — fija azufre residual como MnS
Si 1.0 Mejora la resistencia a la oxidacion — pero en exceso promueve fases fragilizantes de Laves a alta temperatura
Cu 0.5 Elemento residual — controlado para no comprometer la resistencia a la oxidacion
S 0.015 Impureza perjudicial — fragiliza bordes de grano; estrictamente limitada
B 0.006 Microaleante de borde de grano — retarda la coalescencia de carburos y mejora la ductilidad en fluencia

Mecanismo de Endurecimiento

Inconel 617 es una aleacion de endurecimiento por solucion solida unicamente. A diferencia de Inconel 718 o Waspaloy, no contiene formadores de gamma prima (el Al+Ti es insuficiente para nucleacion de Ni3(Al,Ti)). Su resistencia proviene de:

  • Solucion solida Co+Mo: atomos de Co y Mo sustituyen Ni en la matriz FCC, generando campos de tension que frenan el movimiento de dislocaciones. Este mecanismo no se degrada con el tiempo a diferencia de los precipitados gamma prima/gamma prima-prima.
  • Carburos M23C6: precipitan en bordes de grano durante el servicio a alta temperatura, anclando el deslizamiento de bordes de grano (mecanismo dominante de fluencia por encima de 800 C).
  • Capa oxida Cr2O3-Al2O3: la combinacion de 22% Cr + 1.2% Al produce una capa duplex autorregenerativa que no se descascarilla bajo ciclos termicos repetidos, protegiendo la seccion resistente subyacente.

Propiedades Mecanicas de Inconel 617 (N06617)

Propiedades a Temperatura Ambiente (Recocido de Solubilizacion)

Propiedad Minimo Tipico
Resistencia a la Traccion, Rm 690 MPa 730-830 MPa
Limite Elastico, Rp0.2 310 MPa 340-380 MPa
Alargamiento A5 30% 40-55%
Dureza Brinell 170-220 HB
Modulo de Elasticidad 211 GPa

Propiedades Mecanicas a Alta Temperatura (Tension, Direccion Transversal)

Temp. (C) Rm (MPa) Rp0.2 (MPa) A5 (%)
100 650 270 48
200 620 230 45
300 600 220 43
400 570 210 42
500 540 200 41
600 510 190 40
700 400 185 38
750 340 180 36
800 300 170 38
900 220 140 42
1000 ~190 ~90 ~50

Resistencia a la Fluencia (Creep-Rupture) a 100,000 Horas

Temperatura (C) Inconel 617 (MPa) Inconel 625 (MPa) Ventaja 617
650 ~130 ~110 +18%
760 ~55 ~42 +31%
870 ~18 ~12 +50%
980 ~6 ~3 +100%
1000 ~5 N/A* N/A

* Inconel 625 no se recomienda para aplicaciones estructurales por encima de 980 C. Datos de fluencia de Special Metals y literatura tecnica. La ventaja del 617 crece con la temperatura debido a que el Co mantiene el endurecimiento por solucion solida mientras que los precipitados gamma-prima/gamma-prima-prima del 625 se disuelven.

Propiedades Fisicas

Propiedad Valor
Densidad 8.36 g/cm3
Intervalo de Fusion 1330-1380 C
Modulo de Elasticidad (20 C) 211 GPa
Modulo de Elasticidad (800 C) ~155 GPa
Modulo de Elasticidad (1000 C) ~130 GPa
CTE (20-100 C) 11.6 x 10-6/K
CTE (20-1000 C) 15.5 x 10-6/K
Conductividad Termica (100 C) 13.4 W/(m K)
Conductividad Termica (1000 C) ~28-32 W/(m K)
Calor Especifico (20 C) ~420 J/(kg K)
Resistividad Electrica ~1.22 uO m
Coeficiente de Poisson 0.31
Magnetismo No magnetico

Comparativa: Inconel 617 vs Aleaciones Competidoras

Caracteristica Inconel 617 Inconel 625 Hastelloy X
Endurecimiento Solucion solida Co+Mo Solucion solida Mo+Nb Solucion solida Mo+W
Temp. Max. Servicio Continuo ~1100 C ~980 C ~1100 C
Creep 980 C/100 kh (MPa) ~6 ~3 ~4
Resistencia a la Oxidacion Excelente (Cr+Al) Buena (Cr+Nb) Buena (Cr)
Resistencia a Carburizacion Excelente Buena Buena
Resistencia a Corrosion Acuosa Buena Excelente Buena
Precio Relativo $$$$ $$$ $$

Tratamiento Termico y Soldabilidad

Recocido de Solubilizacion: 1150-1200 C (usualmente 1175-1190 C), mantenimiento 0.5-2 h segun espesor, seguido de temple en agua (obligatorio para maximizar resistencia a la fluencia). Para espesores inferiores a 1.5 mm se admite enfriamiento rapido al aire. Importante: no se debe realizar envejecimiento/aging posterior — Inconel 617 no es una aleacion de endurecimiento por precipitacion; un calentamiento prolongado en el rango 540-870 C precipitaria carburos M23C6 continuos en borde de grano que reducen la ductilidad en fluencia.

Soldadura: Soldabilidad generalmente buena. Metodos recomendados: TIG (GTAW), MIG (GMAW), SMAW y plasma. Consumible de aporte: ERNiCrCoMo-1 (AWS A5.14) para TIG/MIG, ENiCrCoMo-1 (AWS A5.11) para electrodo. Temperatura entre pasadas ≤100 C para minimizar la precipitacion de carburos en la ZAT. Para componentes de alta responsabilidad a temperaturas superiores a 900 C, se recomienda un recocido postsoldadura a 1150-1200 C + temple. El alivio de tensiones puede realizarse a 900-950 C con enfriamiento rapido.

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