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AISI 8740 Alloy Steel (UNS G87400)

AISI 8740 Alloy Steel (UNS G87400) Image

Alloy steels contain a broad range of steels whose compositions exceed the limitations of C, Mo, Cr, Va, Mn, Ni, Si, and B associated with carbon steels. These steels are more responsive to mechanical and heat treatments than carbon steels.

 

MACHINABILITY RATINGS

APPROXIMATE SURF. FT. PER MIN.

110

Percent RELATIVE SPEED BASED ON C-1212 as 100 Percent

66

Density:

0.284 lb/in³

Thermal Properties:

323 BTU in/hr.ft².°F

Mechanical Properties:

Mechanical Properties The mechanical properties of annealed AISI 8740 alloy steel are outlined in the table below.

Properties Imperial
Tensile strength 101000 psi
Yield strength 60200 psi
Elastic modulus 27557-30458 ksi
Bulk modulus (typical for steel) 20300 ksi
Shear modulus (typical for steel) 11600 ksi
Poisson’s ratio 0.27-0.30
Elongation at break (50mm) 22.20%
Izod Impact 30.2 ft.lb
Hardness, Brinell 201
Hardness, Knoop (converted from Brinell hardness) 223
Hardness, Rockwell B (converted from Brinell hardness) 93
Hardness, Rockwell B (converted from Brinell hardness, value below normal HRC range, for comparison only) 13
Hardness, Vickers (converted from Brinell hardness) 211
Machinability (hot rolled and cold drawn, based on 100 machinability for AISI 1212 steel) 65

 

Other Designations:

 

BAR/WIRE:  SHEET/STRIP:  PLATE:
 

AMS-6322
AMS-6325
AMS-6327
ASTM-A 304
ASTM-A-322
ASTM-A-331
MIL-S-6049

 

AMS-6358

 

AMS-6358

 TUBE:  PIPE: FORGINGS:
N/A N/A AMS-6322
AMS-6325
AMS-6327

 

Chemical Composition:

Element Content (%)
Iron, Fe 96.595-97.72
Manganese, Mn 0.750-1.00
Nickel, Ni 0.400-0.700
Chromium, Cr 0.400-0.600
Carbon, C 0.380-0.430
Molybdenum, Mo 0.200-0.300
Silicon, Si 0.150-0.300
Sulfur, S 0.0400
Phosphorous, P 0.0350

 

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1-800-631-0728
Category:
Alloy Steel Grades

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    AISI 8740 Alloy Steel (UNS G87400)

    AISI 8740 Alloy Steel (UNS G87400) Image

    Alloy steels contain a broad range of steels whose compositions exceed the limitations of C, Mo, Cr, Va, Mn, Ni, Si, and B associated with carbon steels. These steels are more responsive to mechanical and heat treatments than carbon steels.

     

    MACHINABILITY RATINGS

    APPROXIMATE SURF. FT. PER MIN.

    110

    Percent RELATIVE SPEED BASED ON C-1212 as 100 Percent

    66

    Density:

    0.284 lb/in³

    Thermal Properties:

    323 BTU in/hr.ft².°F

    Mechanical Properties:

    Mechanical Properties The mechanical properties of annealed AISI 8740 alloy steel are outlined in the table below.

    Properties Imperial
    Tensile strength 101000 psi
    Yield strength 60200 psi
    Elastic modulus 27557-30458 ksi
    Bulk modulus (typical for steel) 20300 ksi
    Shear modulus (typical for steel) 11600 ksi
    Poisson’s ratio 0.27-0.30
    Elongation at break (50mm) 22.20%
    Izod Impact 30.2 ft.lb
    Hardness, Brinell 201
    Hardness, Knoop (converted from Brinell hardness) 223
    Hardness, Rockwell B (converted from Brinell hardness) 93
    Hardness, Rockwell B (converted from Brinell hardness, value below normal HRC range, for comparison only) 13
    Hardness, Vickers (converted from Brinell hardness) 211
    Machinability (hot rolled and cold drawn, based on 100 machinability for AISI 1212 steel) 65

     

    Other Designations:

     

    BAR/WIRE:  SHEET/STRIP:  PLATE:
     

    AMS-6322
    AMS-6325
    AMS-6327
    ASTM-A 304
    ASTM-A-322
    ASTM-A-331
    MIL-S-6049

     

    AMS-6358

     

    AMS-6358

     TUBE:  PIPE: FORGINGS:
    N/A N/A AMS-6322
    AMS-6325
    AMS-6327

     

    Chemical Composition:

    Element Content (%)
    Iron, Fe 96.595-97.72
    Manganese, Mn 0.750-1.00
    Nickel, Ni 0.400-0.700
    Chromium, Cr 0.400-0.600
    Carbon, C 0.380-0.430
    Molybdenum, Mo 0.200-0.300
    Silicon, Si 0.150-0.300
    Sulfur, S 0.0400
    Phosphorous, P 0.0350

     

    If you need more details about this product or would like to place an order, please call us!

    CALL US NOW
    1-800-631-0728