Materials for Stud Bolts
ASTM A193 covers alloy and stainless steel bolting material for pressure vessels, Valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.
ASTM A194 covers a variety of carbon, alloy, and martensitic and austenitic stainless steel nuts. These nuts are intended for high-pressure or high-temperature service, or both.


Measuring lengths of Stud Bolts and Hex Bolts


SUS304 Stainless Steel Socket Head Screws Din 915 Set Screw 1


Grades of Stud Bolts
Below a table with materials and grades for flanges, thread rods (bolts) and nuts, arranged on design temperature, flanges, thread rods and recommended nuts.

DESIGN
TEMP. FLANGES GRADE
THREAD RODS GRADE
NUTS
-195° to 102°C ASTM A182
Gr. F304, F304L, F316,
F316L, F321, F347 A320 Gr.B8 Class2 A194 Gr.8A
-101° to -47°C ASTM A350
Gr.LF3 A320 Gr.L7 A194 Gr.7
-46° to -30°C ASTM A350
Gr.LF2 A320 Gr.L7 A194 Gr.7
-29° to 427°C ASTM A105 A193 Gr.B7 A194 Gr.2H
428° to 537°C ASTM A182
Gr.F11, F22 A193 Gr.B16 A194 Gr.2H
538° to 648°C ASTM A182
Gr.F11, F22 A193 Gr.B8 Class1 A194 Gr.8A
649° to 815°C ASTM A182
Gr. F304H, F316H A193 Gr.B8 Class1 A194 Gr.8A
DESIGN
TEMP. FLG'S GRADE
THREAD RODS GRADE
NUTS