SAE 6493 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: 2025-03

Número total de actualizaciones: 2

Historial de actualizaciones

2018-10

Este material cuenta con 104 propiedades — aquí solo se muestra una parte.

Accede a todas las propiedades del material, incluyendo valores detallados según temperatura y condiciones.

SAE 6493 Composición química

Criterios

Valor

Unidad

Número CAS

Criterios

Valor

0.17 – 0.22

Unidad

Número CAS

7440-44-0

Criterios

Valor

0.80 – 1.20

Unidad

Número CAS

7440-47-3

Criterios

Valor

0.30 – 0.60

Unidad

Número CAS

7439-96-5

Criterios

Valor

val1

Unidad

Número CAS

7439-98-7

Criterios

Valor

val1

Unidad

Número CAS

7440-02-0

Criterios

Valor

val1

Unidad

Número CAS

7723-14-0

Criterios

Valor

val1

Unidad

Número CAS

7704-34-9

Criterios

Valor

val1

Unidad

Número CAS

7440-21-3

SAE AMS 6493C: 2024 / Barras, piezas forjadas, cañerías y material para forja de acero 1.0Cr - 3.25Ni - 0.40Mo (0.17 - 0.22C) refundido con electroescoria o refundido en vacío con electrodo consumible, calidad de aeronaves premium

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SAE 6493 Propiedades físicas

Temperatura

0 - 30°C

Propiedad/Valor

Módulo de elasticidad

190 — 210 GPa

Desbloquea todos los detalles

Densidad

7.67 — 7.86 kg/dm³

Desbloquea todos los detalles

Coeficiente de Poisson

0.27 — 0.3

Desbloquea todos los detalles

Este material cuenta con 104 propiedades — aquí solo se muestra una parte.

Consulta propiedades físicas detalladas en distintas temperaturas y condiciones.

SAE 6493 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 650-690°C, any setpoint within this range is acceptable (temperatures below 704°C are sub-critical annealing treatments and are air cooled to room temperature). 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 900-950°C, any setpoint within this range is acceptable. 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 820-870°C, any setpoint within this range is acceptable. 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 air, 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 862-1034 MPa, HRC 26-34 and oil or polymer quenchant is 620°C
for TS 1034-1172 MPa, HRC 33-38 and oil or polymer quenchant is 550°C
for TS 1103-1241 MPa, HRC 36-40 and oil or polymer quenchant is 500°C
for TS 1241-1379 MPa, HRC 40-43 and oil or polymer quenchant is 420°C
for TS 1379-1517 MPa, HRC 43-46 and oil or polymer quenchant is 300°C
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 having minimum tensile strength below 180 ksi (1241 MPa), straightening may be accomplished cold without stress relieving. 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.
Austenitized by heating to 824°C ± 14 (1515°F ± 25), holding at heat for a time commensurate with section thickness, heating equipment, and procedure used, oil quenched to below 32°C (90°F) followed by tempering for 2 hours minimum at 141°C ± 6 (285°F ± 10).

SAE 6493 Propiedades mecánicas

Temperatura

0 - 30°C

Propiedad/Valor

Resistencia a la Tracción

≥ 950 MPa

Desbloquea todos los detalles

Dureza Brinell (HB)

≤ 310

Desbloquea todos los detalles

Alargamiento, A

≥ 11 %

Desbloquea todos los detalles

Tamaño de grano

val1

Desbloquea todos los detalles

Energía de Impacto

val1 J

Desbloquea todos los detalles

Límite elástico, Rp0.2

val1 MPa

Desbloquea todos los detalles

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SAE 6493 Materiales equivalentes internacionales

Mostrando 3 de 43 resultados.

Material

Estándar

País / Productor

Categoría de Equivalencia

Material

K41910

Estándar

UNS

País / Productor

Estados Unidos

Categoría de Equivalencia

Oficial

Material

FDG

Estándar

PATENTADO

País / Productor

Categoría de Equivalencia

Implícito

Material

6492

Estándar

SAE

País / Productor

Estados Unidos

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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43Referencias cruzadas

8Composición
11Propiedades mecánicas
3Propiedades físicas
2Tratamiento térmico
-Metalografía
-Maquinabilidad

-Esfuerzo-Deformación
-Conformabilidad
-Fatiga
-Fractura
-Bicho raro

-Uniones
-Revestimientos
36Dimensiones
-Tribología

-Corrosión
-Envejecimiento
-Resistencia a la intemperie
-Irradiación

1Proveedores Totales