Sanicro 28

Sanicro 28 (UNS N08028, W.Nr. 1.4563, EN X1NiCrMoCu31-27-4, GB NS1104 / 00Cr27Ni31Mo3Cu), tambien conocida como Alloy 28, es un acero inoxidable austenitico de muy alta aleacion desarrollado por Sandvik en Suecia durante los anos 1960 especificamente para la produccion de acido fosforico por via humeda. Con un 27% de cromo, 31% de niquel, 3.5% de molibdeno y 1% de cobre, ofrece una resistencia excepcional en entornos con acidos mixtos, cloruros, fluoruros y sulfuro de hidrogeno, posicionandose como el material metalico mas utilizado en tubos de evaporadores de acido fosforico a nivel mundial. Suministrada por SHUNFU METAL bajo certificaciones ISO 9001 y API Q1, con aprobacion para servicio bajo ASME Calderas y Recipientes a Presion secciones I, III y VIII.

Perfil de la Aleacion Sanicro 28

El Sanicro 28 ocupa un nicho estrategico entre los aceros inoxidables superausteniticos (como el 904L) y las aleaciones base niquel (como los Hastelloy serie C). Su elevado contenido de cromo (26-28%) y molibdeno (3-4%) le confiere un PREN de 38-47, superando ampliamente al 316L (PREN 24) y al 904L (PREN 35), mientras que el 31% de niquel garantiza inmunidad practica a la corrosion bajo tension por cloruros. El cobre (0.6-1.4%) potencia la resistencia en acido sulfurico y el ultra bajo carbono (max. 0.02%) elimina la precipitacion de carburos durante la soldadura, permitiendo su uso en estado soldado. Su diseno original como material para tubos de evaporadores en plantas de acido fosforico ha sido validado por mas de 10 anos de servicio continuo en multiples instalaciones, reemplazando intercambiadores de grafito que sufrian roturas frecuentes. Industrias objetivo: produccion de acido fosforico y fertilizantes, procesamiento de acido sulfurico, petroleo y gas en pozos amargos, energia nuclear, sistemas de agua de mar y desulfuracion de gases. SHUNFU METAL produce Sanicro 28 mediante fusion AOD con control preciso de nitrogeno y analisis OES en cada colada, cumpliendo ASTM B668, B709, EN 10216-5 y los requisitos de NACE MR0175 / ISO 15156 para materiales resistentes al agrietamiento por H2S en equipos de campos petroleros.

Grados Equivalentes de Sanicro 28

Como aleacion de origen sueco con adopcion global, el Sanicro 28 esta registrado en los sistemas normativos mas exigentes, incluyendo codigos ASME para recipientes a presion. SHUNFU METAL certifica la conformidad con cada norma solicitada mediante certificado EN 10204 tipo 3.1 con trazabilidad completa.

Norma / Sistema Designacion Especificacion
ASTM / ASME UNS N08028 B668 (tubo), B709 (placa), B829 (tubo)
EN / DIN 1.4563 / X1NiCrMoCu31-27-4 EN 10088-2, EN 10216-5
ISO 4563-080-28-I ISO 9723
GB (China) NS1104 / 00Cr27Ni31Mo3Cu GB/T 15007
SS (Suecia) 2584 SS 14 25 84
AFNOR (Francia) Z1NCDU31-27-03 NFA 49-217
JIS (Japon) G 4303 / G 4305 JIS G 4303
NACE / ISO NACE MR0175 / MR0103 ISO 15156-3 (servicio amargo)
Codigo ASME Code Case 1325-18 Secciones I, III, VIII division 1
Tubo de aleacion Sanicro 28 SHUNFU METAL
Tubo Sanicro 28
SHUNFU METAL

Aplicaciones Industriales de Sanicro 28

Acido Fosforico y Fertilizantes

Tubos de evaporadores en produccion de H3PO4 via humeda (material de referencia mundial, mas de 10 anos de servicio), concentradores de acido fosforico, intercambiadores de calor en plantas de superfosfato, recuperacion de yeso con fluoruros.

Acido Sulfurico

Tuberias e intercambiadores de calor en H2SO4 40-70% desaireado y superior al 85%, rendimiento comparable a Alloy C en H2SO4 al 98%, condensadores de acido sulfurico, sistemas de dilucion y distribucion de acido.

Petroleo y Gas en Pozos Amargos

Tuberia de produccion, casing y liners en pozos profundos con gas acido (H2S/CO2), suministrado laminado en frio de alta resistencia, wirelines para instrumentacion en pozos profundos, tuberias de transporte de crudo corrosivo, intercambiadores en plantas de tratamiento de superficie.

Energia Nuclear

Intercambiadores de calor en centrales nucleares (resistencia superior a SCC, picaduras y resquicios), sistemas de tuberias criticas, componentes aprobados bajo ASME Seccion III, equipos de refrigeracion de emergencia en reactores.

Agua de Mar y Cloruros

Tuberias de agua de mar, intercambiadores refrigerados por agua marina, sistemas que soportan paradas de hasta un mes sin drenaje (T agua inferior a 30 °C), circuitos de refrigeracion industrial con cloruros, reemplazo de aleaciones de niquel y Cu-Ni que fallaron por corrosion.

FGD y Emisiones con Fluoruros

Lavadores y conductos en sistemas de desulfuracion de gases, manejo de gases de escape con fluoruros en plantas de fertilizantes, recuperacion de yeso fluorado, chimeneas y revestimientos en control de contaminacion acida, torres de absorcion de gases corrosivos.

El Sanicro 28 es el unico material que ha demostrado mas de una decada de servicio continuo como tubo de evaporador en las condiciones mas agresivas de la produccion de acido fosforico. SHUNFU METAL inspecciona cada pieza mediante UT, corrientes inducidas (ECT) y PT segun ASME Seccion V, con certificados EN 10204 tipo 3.1 y opcion de ensayos de corrosion en acido fosforico contaminado bajo el sistema API Q1.

Rango de Suministro de Sanicro 28

SHUNFU METAL suministra Sanicro 28 con enfasis en tuberia sin costura para evaporadores de acido fosforico y equipos de pozos petroleros, manteniendo inventario estrategico de los formatos de mayor rotacion. Plazos de entrega de 3 a 5 semanas en formatos comerciales y de 5 a 8 en produccion especial. Toda la produccion bajo los sistemas integrados ISO 9001 y API Q1.

Forma Proceso Rango Dimensional Norma
Tubo sin Costura Extrusion / laminacion en frio Diam. ext. 6 mm – 325 mm ASTM B668 / EN 10216-5
Placa Laminada Laminacion en caliente Esp. 3 mm – 80 mm, Ancho max. 2500 mm ASTM B709 / EN 10088-2
Chapa Laminada en Frio Laminacion en frio Esp. 0.5 mm – 6 mm, Ancho max. 2000 mm ASTM B709 / EN 10088-2
Barra Redonda Laminacion en caliente / forja Diam. 6 mm – 300 mm EN 10088-3 / EN 10272
Forja / Anillo Forja libre / laminacion de anillo Diam. 80 mm – 800 mm Segun especificacion del cliente

Composicion Quimica de Sanicro 28 (ASTM B668 / EN 10088-2)

La microestructura completamente austenitica del Sanicro 28 se estabiliza gracias a su alto contenido de niquel (30-34%), mientras que el cromo (26-28%), el molibdeno (3-4%) y el cobre (0.6-1.4%) actuan sinergicamente para proporcionar resistencia en medios oxidantes, reductores y ambientes mixtos con cloruros y fluoruros. El nitrogeno controlado (tipicamente 0.06-0.10%) eleva el limite elastico sin comprometer la ductilidad ni la soldabilidad. SHUNFU METAL produce mediante fusion AOD con control preciso del balance Cr/Ni/Mo/Cu/N y analisis OES en cada colada.

Elemento Simbolo Contenido (%)
Hierro Fe Balance (~29-40)
Niquel Ni 30.00 – 34.00
Cromo Cr 26.00 – 28.00
Molibdeno Mo 3.00 – 4.00
Cobre Cu 0.60 – 1.40
Manganeso Mn Max. 2.00
Silicio Si Max. 0.70
Nitrogeno N Max. 0.10 (tipico 0.06-0.10)
Carbono C Max. 0.020
Fosforo P Max. 0.020
Azufre S Max. 0.010

El PREN del Sanicro 28 se situa en 38-47 (PREN = %Cr + 3.3x%Mo + 16x%N), muy superior al 904L (PREN ~35) y al 316L (PREN ~24). La clave de su exito en acido fosforico radica en la combinacion de alta resistencia a la corrosion por picaduras y resquicios (gracias al Cr y Mo) con la tolerancia al acido sulfurico (gracias al Cu) y la inmunidad a la corrosion bajo tension por cloruros (gracias al alto Ni), todo ello en una matriz de hierro que mantiene el coste bajo control. SHUNFU METAL controla el PREN calculado de cada colada como parametro de calidad interno, con valores objetivo superiores a 40, documentado en el certificado quimico bajo el sistema ISO 9001.

Propiedades Mecanicas de Sanicro 28 (Recocido por Solucion)

Tratamiento termico: recocido por solucion a 1040-1100 °C con enfriamiento rapido en agua o aire forzado. Este ciclo disuelve todas las fases secundarias en la matriz austenitica y alivia las tensiones residuales de la conformacion. Para aplicaciones en pozos petroleros (tuberia de produccion y casing), el Sanicro 28 se suministra en condicion laminada en frio de alta resistencia, alcanzando hasta el doble del limite elastico de la condicion recocida. El laboratorio de SHUNFU METAL, acreditado bajo API Q1, certifica las propiedades de cada lote mediante ensayos ASTM E8 y dureza ASTM E18.

Propiedad Valor Unidad Norma
Resistencia a la Traccion (Rm) 500 – 700 MPa ASTM B668 / EN 10088-2
Limite Elastico (Rp0.2) 220 (min.) MPa ASTM B668 / EN 10088-2
Alargamiento (A5) 35 (min.) % ASTM B668 / EN 10088-2
Dureza Max. 240 HBW HBW ASTM B668
Modulo de Elasticidad (20 °C) 200 GPa Calculado
Densidad 8.00 g/cm³ Calculado
Punto de Fusion 1350 – 1410 °C Rango

Para aplicaciones downhole en pozos petroleros, SHUNFU METAL suministra Sanicro 28 laminado en frio de alta resistencia con limites elasticos superiores a 690 MPa, cumpliendo NACE MR0175 / ISO 15156-3. La aleacion registra solo 0.03 mm/ano de corrosion en acido superfosforico al 95% contaminado a 200 °C, frente a 0.23 mm/ano del UNS N08020, consolidandose como el material de referencia para evaporadores de acido fosforico. SHUNFU METAL entrega los protocolos completos con cada despacho bajo el sistema API Q1.

Productos relacionados

We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.
Cookies settings
Accept
Privacy & Cookie policy
Privacy & Cookies policy
Cookies list
Cookie name Active

Privacy Policy

What information do we collect?

We collect information from you when you register on our site or place an order. When ordering or registering on our site, as appropriate, you may be asked to enter your: name, e-mail address or mailing address.

What do we use your information for?

Any of the information we collect from you may be used in one of the following ways: To personalize your experience (your information helps us to better respond to your individual needs) To improve our website (we continually strive to improve our website offerings based on the information and feedback we receive from you) To improve customer service (your information helps us to more effectively respond to your customer service requests and support needs) To process transactions Your information, whether public or private, will not be sold, exchanged, transferred, or given to any other company for any reason whatsoever, without your consent, other than for the express purpose of delivering the purchased product or service requested. To administer a contest, promotion, survey or other site feature To send periodic emails The email address you provide for order processing, will only be used to send you information and updates pertaining to your order.

How do we protect your information?

We implement a variety of security measures to maintain the safety of your personal information when you place an order or enter, submit, or access your personal information. We offer the use of a secure server. All supplied sensitive/credit information is transmitted via Secure Socket Layer (SSL) technology and then encrypted into our Payment gateway providers database only to be accessible by those authorized with special access rights to such systems, and are required to?keep the information confidential. After a transaction, your private information (credit cards, social security numbers, financials, etc.) will not be kept on file for more than 60 days.

Do we use cookies?

Yes (Cookies are small files that a site or its service provider transfers to your computers hard drive through your Web browser (if you allow) that enables the sites or service providers systems to recognize your browser and capture and remember certain information We use cookies to help us remember and process the items in your shopping cart, understand and save your preferences for future visits, keep track of advertisements and compile aggregate data about site traffic and site interaction so that we can offer better site experiences and tools in the future. We may contract with third-party service providers to assist us in better understanding our site visitors. These service providers are not permitted to use the information collected on our behalf except to help us conduct and improve our business. If you prefer, you can choose to have your computer warn you each time a cookie is being sent, or you can choose to turn off all cookies via your browser settings. Like most websites, if you turn your cookies off, some of our services may not function properly. However, you can still place orders by contacting customer service. Google Analytics We use Google Analytics on our sites for anonymous reporting of site usage and for advertising on the site. If you would like to opt-out of Google Analytics monitoring your behaviour on our sites please use this link (https://tools.google.com/dlpage/gaoptout/)

Do we disclose any information to outside parties?

We do not sell, trade, or otherwise transfer to outside parties your personally identifiable information. This does not include trusted third parties who assist us in operating our website, conducting our business, or servicing you, so long as those parties agree to keep this information confidential. We may also release your information when we believe release is appropriate to comply with the law, enforce our site policies, or protect ours or others rights, property, or safety. However, non-personally identifiable visitor information may be provided to other parties for marketing, advertising, or other uses.

Registration

The minimum information we need to register you is your name, email address and a password. We will ask you more questions for different services, including sales promotions. Unless we say otherwise, you have to answer all the registration questions. We may also ask some other, voluntary questions during registration for certain services (for example, professional networks) so we can gain a clearer understanding of who you are. This also allows us to personalise services for you. To assist us in our marketing, in addition to the data that you provide to us if you register, we may also obtain data from trusted third parties to help us understand what you might be interested in. This ‘profiling’ information is produced from a variety of sources, including publicly available data (such as the electoral roll) or from sources such as surveys and polls where you have given your permission for your data to be shared. You can choose not to have such data shared with the Guardian from these sources by logging into your account and changing the settings in the privacy section. After you have registered, and with your permission, we may send you emails we think may interest you. Newsletters may be personalised based on what you have been reading on theguardian.com. At any time you can decide not to receive these emails and will be able to ‘unsubscribe’. Logging in using social networking credentials If you log-in to our sites using a Facebook log-in, you are granting permission to Facebook to share your user details with us. This will include your name, email address, date of birth and location which will then be used to form a Guardian identity. You can also use your picture from Facebook as part of your profile. This will also allow us and Facebook to share your, networks, user ID and any other information you choose to share according to your Facebook account settings. If you remove the Guardian app from your Facebook settings, we will no longer have access to this information. If you log-in to our sites using a Google log-in, you grant permission to Google to share your user details with us. This will include your name, email address, date of birth, sex and location which we will then use to form a Guardian identity. You may use your picture from Google as part of your profile. This also allows us to share your networks, user ID and any other information you choose to share according to your Google account settings. If you remove the Guardian from your Google settings, we will no longer have access to this information. If you log-in to our sites using a twitter log-in, we receive your avatar (the small picture that appears next to your tweets) and twitter username.

Children’s Online Privacy Protection Act Compliance

We are in compliance with the requirements of COPPA (Childrens Online Privacy Protection Act), we do not collect any information from anyone under 13 years of age. Our website, products and services are all directed to people who are at least 13 years old or older.

Updating your personal information

We offer a ‘My details’ page (also known as Dashboard), where you can update your personal information at any time, and change your marketing preferences. You can get to this page from most pages on the site – simply click on the ‘My details’ link at the top of the screen when you are signed in.

Online Privacy Policy Only

This online privacy policy applies only to information collected through our website and not to information collected offline.

Your Consent

By using our site, you consent to our privacy policy.

Changes to our Privacy Policy

If we decide to change our privacy policy, we will post those changes on this page.
Save settings
Cookies settings