注释NOTES1. 螺栓材料的补焊是不允许的。
Repair welding of bolting material is not permitted. 2. 在此，奥氏体螺栓材料经过碳化溶液的处理，但是没有经过应变硬化，因此归在ASTM A193的类别1或类别1A。推荐采用相应材料的ASTM A194螺母。
Where austenitic bolting materials have been carbide solution treated but not strain hardened, they are designated Class 1 or Class 1A in ASTM A193. ASTM A194 nuts of corresponding material are recommended. 3. 在此奥氏体螺栓材料经过碳化溶液处理和应力硬化处理，因此归在ASTM A193类别2里。推荐采用相应材料的ASTM A194螺母。
Where austenitic bolting materials have been carbide solution treated and strain hardened, they are designated Class 2 in ASTM A193. ASTM A194 nuts of corresponding material are recommended. 4. 关于应用的范围和强度等级，参阅ASME B16.34段5.1.1.
For limitations of usage and strength levels, see ASME B16.34 para. 5.1.1. 5. 被钻孔或头部尺寸太小的螺栓不能使用。
Bolts with drilled or undersize heads shall not be used. 6. 对于应用在低温环境的铁素体螺栓材料，推荐采用ASTM A194等级4或等级7螺母。
For ferritic bolting materials intended for service at low temperatures, ASTM A194 Gr. 4 or Gr. 7 nuts are recommended. 7. 可用于经过淬火和回火的钢螺栓的螺母材料可以是ASTM A194等级2和2H.
Acceptable nuts for use with these quenched and tampered steel bolts are ASTM A194 Grade 2 and 2H. 8. 柱头螺栓的机械性能要求与螺栓相同。
Mechanical property requirements for studs shall be the same as those for bolts. 9. 这些是适用于高温应用环境的奥氏体不锈钢阀门的螺栓材料。
These are bolting materials suitable for high temperature service with austenitic stainless steel valve materials. 10. 只有等级651和660材料才能被采用。
Only Grades 651 and 660 shall be used. 11. 可以采用相同材料的螺母，或者可以采用可兼容的ASTM A194等级材料。
Nuts may be of the same material or may be of compatible grade of ASTM A194. 12. 不允许具有可锻性，除非生产商对这些部件做过最后的热处理或加工，并且经过检测证实满足相同规格说明和认证下其它许可条件的要求，包括这些材料的最终张力，屈服力，及伸展特性都等于或优于其它许可条件之一的要求。
Forging quality not permitted unless the producer last heating or working these parts tests them as required for other permitted conditions in the same specification and certifies their final tensile, yield, and elongation properties to equal or exceed the requirements for one of the other permitted conditions. 13. 最高工作温度设定为260oC，除非材料经过退火，溶液退火，或者热处理，因为最高硬度的冷轧钢反过来会影响到蠕变破裂温度范围的设计应力。
Maximum operating temperature is arbitrarily set at 500oF (260oC) unless material has been annealed, solution annealed, or hot finished, because hard temper adversely affects design stress in the creep-rupture temperature range |
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