SAE 4330V Aceros estructurales y de construcción
Grupo de materiales:
Aleaciones Ferrosas / Aceros estructurales y de construcción
País/Estándar:
Estados Unidos / SAE
Actualizaciones de datos
Última actualización: 2019-12
Número total de actualizaciones: 4
Historial de actualizaciones
2019-09
2019-01
2018-10
Este material cuenta con 111 propiedades — aquí solo se muestra una parte.
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SAE 4330V Propiedades físicas
Temperatura
Módulo de elasticidad
190 — 210
GPa
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Densidad
7.67 — 7.86
kg/dm³
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Coeficiente de Poisson
0.27 — 0.3
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Este material cuenta con 111 propiedades — aquí solo se muestra una parte.
Consulta propiedades físicas detalladas en distintas temperaturas y condiciones.
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SAE 4330V Tratamiento Térmico
- Preheating: Preheating until furnace stabilization in the 900 to 1200°F (482 to 649°C) range is recommended before heating parts above 1300°F (704°C) if the parts have previously been heat treated to a hardness greater than 35 HRC, have abrupt changes of section thickness, have sharp reentrant angles, have finished machined surfaces, have been welded, have been cold formed or straightened, have holes, or have sharp or only slightly-rounded notches or corners.
Annealing: Heated to 843-857°C, any set point within this range is acceptable (temperatures ≥ 704°C are to be cooled at a rate not to exceed 111°C per hour to below 427°C). Soaking time (for annealing, normalizing and austenitizing) is specified below. Air cooled to ambient temperature. Isothermal annealing treatments may be used provided equivalent hardness is obtained (heated to annealing temperature, soaked for the time specified above, cooled to a temperature below the critical, held for sufficient time to complete transformation, and air cooled to ambient temperature).
Subcritical annealing: When required, subcritical annealing shall be accomplished prior to hardening by heating to a set temperature between 1150 and 1250°F (621 and 677°C). Cooling to ambient temperature.
Pre-hardening stress relief: When required, pre-hardening stress relieving shall be done in accordance with AMS2759/11 prior to hardening by heating to a set temperature between 1000 and 1250°F (538 to 677°C). Cooling to ambient temperature.
Normalizing: Heated to 899°C. Circulated air or atmosphere is recommended for thicknesses greater than 76 mm. Normalizing may be followed by tempering or subcritical annealing.
Hardening (austenitizing and quenching): Heated to 871°C. The parts shall be cooled to or below the quenchant temperature or to a temperature low enough to achieve complete transformation, before tempering. Hardening quenchant should be oil or polymer. Prior to initial tempering parts may be snap tempered for 2 hours minimum at a temperature, usually 400°F (204°C), that is lower than the tempering temperature. Welded parts, and brazed parts with a brazing temperature above the normalizing temperature, shall be normalized before hardening. For welded or brazed alloys that are not normalized, the parts shall be annealed. Welded parts should be preheated. Parts identified as damage tolerant, maintenance critical, or fracture critical shall be in the normalized condition before hardening, unless the alloy is not normalized, in which case the part shall be annealed.
Tempering: Parts should be tempered within two hours of quenching. Suggested tempering temperatures:
for TS 1241-1379 MPa, HRC 40-43 and oil or polymer quenchant is 538°C
for TS 1379-1517 MPa, HRC 43-46, and oil or polymer quenchant is 427°C (at least two tempering operations required). Steel is not recommended for other TS ranges.
Soaking time shall be not less than 2 hours plus 1 hour additional for each inch (25 mm) of thickness or fraction thereof greater than 1 inch (25 mm). Thickness is defined in AMS2759. When load thermocouples are used, the soak time shall be 2 to 3 hours. Multiple tempering cycles are permitted. When multiple tempering cycles are required, parts shall be cooled to ambient temperature between tempering treatments. When tempering cannot be started within 4 hours from the end of quenching, parts shall be snap tempered for 2 hours minimum at a temperature that is lower than the final tempering set temperature, usually 400°F (204°C). For parts hardened and tempered to minimum tensile strength of 180 ksi (1241 MPa) and higher, straightening shall be accomplished during tempering, or by heating to not higher than 50°F (28°C) below the tempering temperature. Hot or warm straightening after tempering shall be followed by stress relieving. It is permissible to retemper at a temperature not higher than the last tempering temperature after straightening during tempering.
Soak time for annealing, normalizing, and austenitizing:
t ≤ 6.35 mm, minimum soak time (air or atmosphere) is 25 minutes or 18 minutes (salt)
6.35 < t ≤ 12.70 mm, minimum soak time (air or atmosphere) is 45 minutes or 35 minutes (salt)
12.70 < t ≤ 25.40 mm, minimum soak time (air or atmosphere) is 1 hour or 40 minutes (salt)
25.40 < t ≤ 38.10 mm, minimum soak time (air or atmosphere) is 1 hour and 15 minutes or 45 minutes (salt)
38.10 < t ≤ 50.80 mm, minimum soak time (air or atmosphere) is 1 hour and 30 minutes or 50 minutes (salt)
50.80 < t ≤ 63.50 mm, minimum soak time (air or atmosphere) is 1 hour and 45 minutes or 55 minutes (salt)
63.50 < t ≤ 76.20 mm, minimum soak time (air or atmosphere) is 2 hours or 1 hour (salt)
76.20 < t ≤ 88.90 mm, minimum soak time (air or atmosphere) is 2 hours and 15 minutes or 1 hour and 5 minutes (salt)
88.90 < t ≤ 101.60 mm, minimum soak time (air or atmosphere) is 2 hours and 30 minutes or 1 hour and 10 minutes (salt)
101.60 < t ≤ 114.30 mm, minimum soak time (air or atmosphere) is 2 hours and 45 minutes or 1 hour and 15 minutes (salt)
114.30 < t ≤ 127.00 mm, minimum soak time (air or atmosphere) is 3 hours or 1 hour and 20 minutes (salt)
127.00 < t ≤ 203.20 mm, minimum soak time (air or atmosphere) is 3 hours and 30 minutes or 1 hour and 40 minutes (salt)
> 203.20 mm, minimum soak time is 4 hours and 30 minutes for every 76 mm or increment of 76 mm greater than 203 mm (air or atmosphere) or 2 hours plus 20 minutes for every 76 mm or increment of 76 mm greater than 203 mm (salt)
Thickness is the minimum dimension of the heaviest section of the part.
Parts coated with copper plate or similar reflective coatings that tend to reflect radiant heat shall have their soak time increased by at least 50%, unless load thermocouples are used. This increase does not apply to salt bath heat treating, tempering, or sub-zero processing.
The parts shall be held for sufficient time to ensure that the center of the most massive area has reached temperature and the necessary transformation and diffusion have taken place.
Maximum soak time at temperature shall not exceed three times the minimum soak time including time additions for copper plating or similar reflective coating.
Longer times may be necessary for parts with complex shapes or parts that do not heat uniformly. - Annealing temperature: 843 - 857°C (1550 - 1575°F), cool at a rate not to exceed 111°C (200°F) per hour to below 427°C (800°F). Normalizing temperature: 899°C (1650°F); Austenitizing temperature: 871°C (1600°F). Hardening quenchant: oil, polymer, inert gas. (Marquenching in a nitrate/nitrite salt bath, oil bath, or alternate quenchant operated at a set temperature applicable to the alloys processed is permitted. The parts shall be in the marquenching bath only for sufficient time to stabilize the parts at the bath temperature, but not less than 2 minutes, followed by cooling to approximately ambient temperature. Salt residues shall be removed by a hot water rinse before air tempering).
Tempering: Minimum 260°C (500°F), at least two tempering operations are required.
All parts, shall be in one of the following conditions prior to austenitizing: normalized, normalized or tempered or hardened. If those parts have been normalized only without tempering or overaging, they shall be preheated before exposure to the austenitizing temperature.
SAE 4330V Propiedades mecánicas
Temperatura
Resistencia a la Tracción
1241 — 1655
MPa
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Dureza de Rockwell (HR)
46 — 49
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SAE 4330V Materiales equivalentes internacionales
Mostrando 15 de 48 resultados.
Material
Estándar
País / Productor
Categoría de Equivalencia
Material
Estándar
EN
País / Productor
Unión Europea
Categoría de Equivalencia
Implícito
Material
Estándar
AFNOR NF
País / Productor
Francia
Categoría de Equivalencia
Implícito
Material
Estándar
B.S.
País / Productor
Reino Unido
Categoría de Equivalencia
Implícito
Material
Estándar
CSN
País / Productor
República Checa
Categoría de Equivalencia
Implícito
Las categorías de equivalencia reflejan la comparación de composición química y propiedades mecánicas — verifique siempre la idoneidad según la especificación aplicable a su aplicación.
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- 48Referencias cruzadas
- -Composición
- 5Propiedades mecánicas
- 3Propiedades físicas
- 3Tratamiento térmico
- -Metalografía
- -Maquinabilidad
- -Esfuerzo-Deformación
- -Conformabilidad
- -Fatiga
- 2Fractura
- -Bicho raro
- -Uniones
- -Revestimientos
- -Dimensiones
- -Tribología
- -Corrosión
- -Envejecimiento
- -Resistencia a la intemperie
- -Irradiación
- 50Proveedores Totales