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    Products
    Double headed stud for pipeline equipment
    Details
    执行标准
    Standard
    材料类别
    Material Type & Grade
    公称尺寸
    Normal Size (in.)
    长度
    Length
     螺纹
    Screw Thread
    机械性能 Mechanical Requirement
    σb
    (MPa)
    σ0.2
    (MPa)
    δ4
    (%)
    ψ
    (%)
    硬度
    Hardness
    ASME/ANSI B 16.5
    ASME/ANSI B 18.2.1
    ASME/ANSI B 1.1
    A 307
    A
    所有直径
    All diameters
    按合同
    规定
    According to order
    粗牙,8牙系列
    螺纹精度2A级
    UNC, 8UN
    Accuracy of thread Grade 2A
    ≥415
    ——
    18
    ——
    HB121~241
    B
    415~690
    HB121~212
    A 325
    1型
    1 Type
    0.5~1
    ≥827
    ——
    ——
    ——
    HB253~319
    1.125~1.5
    ≥724
    HB223~286
    A 354
    BC
    0.25~2.5
    ≥862
    ≥752
    16
    50
    HB255~331
    >2.5
    ≥793
    ≥683
    45
    HB235~311
    BD
    0.25~2.5
    ≥1034
    ≥896
    14
    40
    HB311~363
    >2.5
    ≥965
    ≥793
    HB293~363