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Double headed stud for pipeline equipment
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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


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