Double headed stud for pipeline equipment
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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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