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The SAE steel grades system is a standard … The SAE steel grades system is a standard alloy numbering system (SAE J1086 - Numbering Metals and Alloys) for steel grades maintained by SAE International. In the 1930s and 1940s, the American Iron and Steel Institute (AISI) and SAE were both involved in efforts to standardize such a numbering system for steels. These efforts were similar and overlapped significantly. For several decades the systems were united into a joint system designated the AISI/SAE steel grades. In 1995 the AISI turned over future maintenance of the system to SAE because the AISI never wrote any of the specifications. Today steel quotes and certifications commonly make reference to both SAE and AISI, not always with precise differentiation. For example, in the alloy/grade field, a certificate might refer to "4140", "AISI 4140", or "SAE 4140", and in most light-industrial applications any of the above is accepted as adequate, and considered equivalent, for the job at hand, as long as the specific specification called out by the designer (for example, "4140 bar per ASTM-A108" or "4140 bar per AMS 6349") is certified to on the certificate. The alloy number is simply a general classifier, whereas it is the specification itself that narrows down the steel to a very specific standard. The SAE steel grade system's correspondence to other alloy numbering systems, such as the ASTM-SAE unified numbering system (UNS), can be seen in cross-referencing tables (including the ones given below). The AISI system uses a letter prefix to denote the steelmaking process. The prefix "C" denotes open-hearth furnace, electric arc furnace or basic oxygen furnace steels, while "E" specifies only electric arc furnace steel. A letter "L" within the grade name indicates lead as an added ingredient; for example, 12L14 is a common grade that is 1214 with lead added for machinability. Suffixes may be added to the steel grade which specify the forming process used to create a part. These may include cold working (CDS), hot working (HR), quenching and tempering (Q&T), and other methods.nd tempering (Q&T), and other methods.
, A classificação normativa SAI é a classifi … A classificação normativa SAI é a classificação dos aços segundo as normas da SAE (Society of Automotive Engineers - EUA), a mais utilizada em todo o mundo para aços (aços sem adição de elementos de liga, além dos que permanecem em sua composição no processo de fabricação) e aços de baixa liga (aços com baixas porcentagens de elementos de liga). A classificação SAE é baseada na composição química do aço. A cada composição normalizada pela SAE corresponde a uma numeração com 4 ou 5 dígitos. A mesma classificação também é adotada pela AISI (American Iron and Steel Institute-EUA). Um extrato contendo exemplos das classificações de alguns aços mais comuns é apresentado na listagem a seguir. No total são previstas muitas dezenas de classificações. Nelas, os 2 dígitos finais XX indicam os centésimos da porcentagem de C (Carbono) contida no material, podendo variar entre 05, que corresponde a 0,05% de C, a 95, que corresponde a 0,95% de C. Se a porcentagem de C atinge ou ultrapassa 1,00%, então o final tem 3 dígitos (XXX) e a classificação tem um total de 5 dígitos.a classificação tem um total de 5 dígitos.
, La norma AISI (también conocida por ser un … La norma AISI (también conocida por ser una clasificación de aceros y aleaciones de materiales no ferrosos). Es la más común en los Estados Unidos. AISI es el acrónimo en inglés de American Iron and Steel Institute (Instituto americano del hierro y el acero), mientras que SAE es el acrónimo en inglés de Society of Automotive Engineers (Sociedad de Ingenieros Automotrices). En 1912, la SAE promovió una reunión de productores y consumidores de aceros donde se estableció una nomenclatura y composición de los aceros que posteriormente AISI expandió. En este sistema los aceros se clasifican con cuatro dígitos. El primero especifica la aleación principal, el segundo indica el porcentaje aproximado del elemento principal y con los dos últimos dígitos se conoce la cantidad de carbono presente en la aleaciónantidad de carbono presente en la aleación
, La Society of Automotive Engineers (SAE) d … La Society of Automotive Engineers (SAE) designa gli acciai grado SAE (SAE steel grades). Quattro cifre che rappresentano la composizione chimica standard per acciai. L'American Iron and Steel Institute (AISI) iniziò un lavoro simile. Una lettera è usata come prefisso per denotare il procedimento di fabbricazione. Il prefisso "C" denota Forno Martin-Siemens, Forno elettrico ad arco o Processo LD, mentre la lettera "E" denota Forno elettrico ad arco. Prima del 1995 la AISI fu coinvolta, e lo standard chiamato AISI/SAE steel grades. AISI fermò la collaborazione, nessuno standard fu mai pubblicato da parte sua.o standard fu mai pubblicato da parte sua.
, Třídy oceli určují její vlastnosti a jakost. Ve světě se používá značení evropské EN 10027, německé DIN, americké ASTM a SAE. V České republice se používá značení dané českými státním normami (ČSN). V tomto článku je popsáno jen značení podle ČSN.
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La Society of Automotive Engineers (SAE) d … La Society of Automotive Engineers (SAE) designa gli acciai grado SAE (SAE steel grades). Quattro cifre che rappresentano la composizione chimica standard per acciai. L'American Iron and Steel Institute (AISI) iniziò un lavoro simile. Una lettera è usata come prefisso per denotare il procedimento di fabbricazione. Il prefisso "C" denota Forno Martin-Siemens, Forno elettrico ad arco o Processo LD, mentre la lettera "E" denota Forno elettrico ad arco. Prima del 1995 la AISI fu coinvolta, e lo standard chiamato AISI/SAE steel grades. AISI fermò la collaborazione, nessuno standard fu mai pubblicato da parte sua.o standard fu mai pubblicato da parte sua.
, A classificação normativa SAI é a classifi … A classificação normativa SAI é a classificação dos aços segundo as normas da SAE (Society of Automotive Engineers - EUA), a mais utilizada em todo o mundo para aços (aços sem adição de elementos de liga, além dos que permanecem em sua composição no processo de fabricação) e aços de baixa liga (aços com baixas porcentagens de elementos de liga).baixas porcentagens de elementos de liga).
, Třídy oceli určují její vlastnosti a jakost. Ve světě se používá značení evropské EN 10027, německé DIN, americké ASTM a SAE. V České republice se používá značení dané českými státním normami (ČSN). V tomto článku je popsáno jen značení podle ČSN.
, La norma AISI (también conocida por ser un … La norma AISI (también conocida por ser una clasificación de aceros y aleaciones de materiales no ferrosos). Es la más común en los Estados Unidos. AISI es el acrónimo en inglés de American Iron and Steel Institute (Instituto americano del hierro y el acero), mientras que SAE es el acrónimo en inglés de Society of Automotive Engineers (Sociedad de Ingenieros Automotrices). En 1912, la SAE promovió una reunión de productores y consumidores de aceros donde se estableció una nomenclatura y composición de los aceros que posteriormente AISI expandió.s aceros que posteriormente AISI expandió.
, The SAE steel grades system is a standard … The SAE steel grades system is a standard alloy numbering system (SAE J1086 - Numbering Metals and Alloys) for steel grades maintained by SAE International. In the 1930s and 1940s, the American Iron and Steel Institute (AISI) and SAE were both involved in efforts to standardize such a numbering system for steels. These efforts were similar and overlapped significantly. For several decades the systems were united into a joint system designated the AISI/SAE steel grades. In 1995 the AISI turned over future maintenance of the system to SAE because the AISI never wrote any of the specifications.ISI never wrote any of the specifications.
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, SAE steel grades
, Acciai grado SAE
, Třídy oceli
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