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    SELECTION FOR SERVICE CONDITION

    SERVICE CONDITION
    STUDBOLTS
    NUTS
    WORKING TEMPERATURE

    High Pressure
    High Temperature

    ASTM A193 Gr.
    BV6
    B7
    B7M
    B16

    ASTM A 194
    6
    2H
    2HM
    4 Or 7

    0-480 C
    50-450

    50-450

    High Temperature
    High Corrosive
    ASTM A 193 Gr. B8
    B8M
    B8T
    ASTM A 194 Gr.8
    8M
    8T
    540-800
    540-800
    540-800
    High Pressure
    Low Temperature
    ASTM A320 Gr.L7
    ASTM A 194 Gr4 or 7
    100-50
    Low Temperature
    ASTM A320 Gr.B8
    B8M
    B8T
    ASTM A 194Gr.8
    8M
    8t

    250-100
    250-100
    250-100

    MECHANICAL PROPERTIES
    ASTM / SAE / STANDARDS

    GRADES
    STUD BOLT- GRADES
    NUT -GRADES
    B7
    B7M
    B6
    B8
    B8M
    B8T
    B16
    L7
    2H
    2HM
    G4
    G7
    G6
    G8
    8M
    8T
    UTS KgS /mm2 (min)
    87.9
    70.3
    77.3
    52.7
    52.7
    52.7
    87.9
    87.9
     
     
     
     
     
     
     
     
    Yield Stress
    Kg /mm2(min)
    73.8
    50.2
    59.8
    21.1
    21.1
    21.1
    73.8
    73.8
     
     
     
     
     
     
     
     
    Elongation %(min)
    16
    18
    15
    30
    30
    30
    18
    16
     
     
     
     
     
    30
    30
    30
    Reduction Area %(min)
    50
    50
    50
    50
    50
    50
    50
    50
     
     
     
     
     
    50
    50
    50
    Hardness
     
    99HRB
    Max
     
    95.5
    HRB
    Max
    95.5
    HRB
    Max
    95.5
    HRB
    Max
     
     
    24-38
    HRC
    22
    HRC
    Max
    24-38
    HRC
    24-38
    HRC
    20-38
    HRC
    60-105
    HRC
    60-105
    HRC
    60-105
    HRC

    IS 1367 Part III / LSO / DIN STANDARDS

    Mechanical Property
    4.6
    4.8
    5.6
    5.8
    6.8
    8.8
    <16
    8.8
    >16
    9.8
    10.9
    12.9
    Tensile strenght Rm N/mm2
    Nom
    400
    400
    400
    400
    600
    800
    800
    900
    1000
    1200
    Min
    400
    420
    500
    520
    600
    800
    830
    900
    1040
    1220
    Yield stress N/mm2
    Min
    240
    320
    300
    400
    480
     
     
     
     
     
    Max
    240
    340
    300
    420
    480
     
     
     
     
     
    Elongation %
    Min
    22
    14
    20
    10
    8
    12
    12
    10
    9
    8
    Brinell Hardness
    Min
    114
    124
    147
    152
    181
    219
    242
    266
    295
    353
    Max
     
    209
     
     
    238
    285
    319
    342
    362
    412
    Rock well Hardness HRC
    Min
     
     
     
     
     
    22
    23
    27
    32
    39
    Max
     
     
     
     
     
    32
    34
    36
    39
    44

    CHEMICAL REQUIREMENTS
    ASTM / SAE STANDARDS

    Grades
    Material
    Carbon
    Manganese
    Phosphorus
    Sulphur
    Silicon
    Chromium
    Nickel
    Molybdenum
    Titanium Vanadium
     
     
    %
    %
    %
    %
    %
    %
    %
    %
    %
    %
    2.2HM
    &2H
    Carbon
    0.40min
    1.00max
    0.040max
    0.050max
    0.40max
     
     
     
       
    4
    Carbonmoly
    - bdenum
    0.04-0.50
    0.70-0.90
    0.035max
    0.040max
    0.15-0.35
     
     
    0.20-0.30
       
    6
    AISI
    410
    0.15max
    1.00max
    0.040max
    0.030max
    1.00max
    11.50-
    13.50
     
     
       
    B 7
    B 7M
    AISI
    4140
    4142/
    4145
    4140H
    4142H
    4145H
    0.37-0.49
    0.65
    0.04max
    0.04max
    0.15-
    0.35
    0.75-
    1.20max
     
    0.15-
    0.25
       
    B8/B8A
    AISI304
    0.08max
    2.00max
    0.045max
    0.030max
    1.00max
    18.00-
    20.00
    8.00-10.50
       
    B8M/8MA
    AISI316
    0.08max
    2.00max
    0.045max
    0.030max
    1.00max
    16.00-
    18.00
    10.00-
    14.00
    2.00-
    3.00
       
    B8T/
    B8TA
    AISI321
    0.08max
    2.00max
    0.045max
    0.030max
    1.00max
    17.00-
    19.00
    9.00-
    12.00
     
    5*Carbon
    content min
     
    B16
     
    0.36-
    0.44
    0.45-
    0.70
    0.035max
    0.040max
    0.15-
    0.35
    0.8.-
    1.15
     
    0.50-
    0.65
      0.25-
    0.35
    L7
     
    0.38-
    0.48
    0.75-
    1.00
    0.035max
    0.040max
    0.15-
    0.35
    0.80--
    1.10
     
    0.15-
    0.25
       

    IS /ISO/ DIN STANDARDS

    Grades
    Material
    Min
    Carbon
    Manganese
    Phosphorus
    Sulphur
    Silicon
    Chromium
    Nickel
    Molybdenum
    Min
     
     
     
     
     
     
     
     
    Max
    0.23
    1.5
    0.050
    0.050
     
     
     
     
    Min
    0.35
    0.60
     
     
    0.05
     
     
     
    Max
    0.45
    1.00
    0.060
    0.06
    0.35
     
     
     
    Min
    0.35
    0.50
     
     
    0.10
    0.90
     
    0.20
    Max
    0.45
    0.80
     
     
    0.35
    1.50
     
    0.40
    Min
    0.35
    0.45
     
     
    0.10
    0.90
    1.30
    0.20
    Max
    0.45
    0.70
     
     
    0.35
    1.40
    1.80
    0.35
    4.6
    4.8
    En-3B
    IS-2062
    5.6
    5.8
    6.8/8.8
    En-8
    En-9
    9.8
    10.9
    En-19
    12.9
    En-24

    COMPARSION OF DIFFERENT STRENGTH GRADES

    SAE
    B.S.
    I.S.
    I.S.O.
    DIN
    ULTIMATE TENSILE STRENGTH
    HARDNESS
    Tonnes/in2
    (Kgf/mm2)
    Newtons/mm2
    Min
    (Kgf/mm2)
    pounds/in3
    Min
    (Kgf/mm2)
    BHN
    HRb
    HRc
     
     
    4.6
     
    400
    (40.8)
     
    114
    209
    67
    95
     
    GRADE
    1
     
     
     
     
    60,000
    (42.3)
    (121)
    (241)
    70
    100
     
     
     
    4.8
     
    420
    (42.8)
     
    124
    209
    71
    95
     
     
     
    5.6
     
    500
    (51.0)
     
    147
    209
    79
    95
     
    GRADE
    2
     
     
     
     
    74,000
    (52.1)
    (154)
    (241)
    80
    100
     
     
     
    5.8
     
    520
    (53.0)
     
    152
    209
    82
    95
     
     
    P
     
    35/45
    (55.2/71.0)
     
     
    152
    207
     
     
     
     
    6.8
     
    600
    (61.2)
     
    181
    238
    89
    99
     
     
    R
     
    45/55
    (71.0/86.8)
     
     
    201
    285
     
     
     
    S
     
    50/60
    (78.9/94.7)
     
     
    223
    310
     
    (20/33)
     
     
    8.8
     
    800<M16
    830>M16
    (81.6)
    (84.6)
     
    219/285
    242/319
     
    20/30
    23/34
    GRADE
    5
     
     
     
     
    1,20,000
    (84.6)
    (266)
    (318)
     
    25/34
     
    T
     
    55/65
    (86.8/102.6)
     
     
    248
    335
     
    (24/36)
     
    U
     
    60/70
    (94.7/110.5)
     
     
    269
    331
     
    (28/36)
     
    V
     
    65/75
    (102.6/118.4)
     
     
    293
    370
     
    (31/40)
    GRADE
    8
     
     
     
     
    1,50,000
    (105.7)
    (311)
    (362)
     
    33/39
     
     
    10.9
     
    1,040
    (106.0)
     
    295
    362
     
    31/39
     
    W
     
    70/80
    (110.5/126.3)
     
     
    311
    375
     
    (33/41)
     
    X
     
    75/85
    (118.4/134.2)
     
     
    341
    410
     
    (37/44)
     
     
    12.9
     
    1,220
    (124.4)
     
    353
    412
     
    38/44
     
    Y
     
     
    80/90
    126.3/142.0)
     
    363
    429
     
    (39/46)
     
    Z
     
     
    100Min.
    (157.8)
     
    444
     
    (47)