Stainless Steel Full Thread Stud Bolt | Dimensions | Specifications | Stainless Steel Fasteners Data | Diameters | Size | Fasteners Weight Calculator | Price in India
Key Specifications / Features Keywords: Full Thread Stud Bolt. Name: full thread stud bolt. Size: 5/8 Inch X 3-3/4 Inch. Material: ASTM A193 B7. Standard: ANSI/ASME B18.2.1.
MATERIALS-STUDBOLTS ASTM A193 B8
ASTM A193 specification covers alloy steel and stainless steel bolting material for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.Several grades are covered, including ferritic steels and austenitic stainless steels designated B5, B8,B8M and so forth. Selection will depend upon design, service conditions, mechanical properties, and high temperature characteristics.Material according to ASTM A193 B8M is often available in national coarse (UNC) thread pitches, if being used in traditional applications, threads are specified 8 threads per inch (tpi) for diameters above one inch.
ASTM A193 specification covers alloy steel and stainless steel bolting material for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.Several grades are covered, including ferritic steels and austenitic stainless steels designated B5, B8, and so forth. Selection will depend upon design, service conditions, mechanical properties, and high temperature characteristics.Material according to ASTM A193 B8 is often available in national coarse (UNC) thread pitches, if being used in traditional applications, threads are specified 8 threads per inch (tpi) for diameters above one inch.
ASTM A320 specification covers alloy steel bolting materials for pressure vessels, valves, flanges, and fittings for low-temperature service. Each alloy shall conform to the prescribed chemical composition requirements. The material, as represented by the tension specimens, shall conform to the requirements as to tensile properties such as tensile strength, yield strength, elongation, and hardness. The material shall meet the prescribed impact energy absorption requirements and the recommended test temperature. According to ASTM A320 mechanical tests shall be conducted on the material, namely: impact testing, tension testing, and hardness testing. Inside ASTM A320 several grades are covered, including both ferritic and austenitic steels designated L7, B8, etc. Selection will depend on design, service conditions, mechanical properties, and low-temperature characteristics The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. Like the ASTM A193 specification, unless otherwise specified, the 8UN thread series is specified on fastener larger than 1 ” in diameter. ASTM A320, Grade L7 - This grade is intended for low-temperature service down to minus 150ºF and has a minimum Charpy impact value of 15 ft-lb at this temperature. Sizes 2-1/2 in. and under.
Stud bolt, A193, Gr.B7, Heavy Hex Nuts, A194 Gr.2H, Washers,
Product Name : Stud bolt, A193, Gr.B7, Heavy Hex Nuts, A194 Gr.2H, Washers,
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ASTM A193 B7 (Cr- Mo AISI 4140,4142,4145 ) ASTM A1193 B7M (Cr- Mo AISI 4140,4142,4145 ) ASTM A193 B16 (Cr- Mo -V ) ASTM A193 B5 (5% Cr AISI 501) ASTM A320-L7 (Cr- Mo AISI 4140,4142,4145 ) ASTM A 320 L7M ASTM A194 Gr.2H ASTM A194 Gr.2HM ASTM A194 Gr.4
In Petro and chemical industry for flange connections Stud Bolts and Hex Bolts are used. The Stud Bolt is a threaded rod with 2 heavy hexagon nuts, while the Hex Bolt has a head with one nut. Nuts and head are both six sided.
STUD BOLTS GENERAL
The quantity of bolts for a flange connection will be given by the number of bolt holes in a flange, diameter and length of bolts is dependent of flange type and Pressure Class of flange.
Stud Bolt length are defined in ASME B16.5 standard. The length in inches is equal to the effective thread length measured parallel to the axis, from the first to the first thread without the chamfers (points). First thread is defined as the intersection of the major diameter of the thread with the base of the point.
The length of metric Stud Bolts measured parallel to axis, is the distance from each Stud Bolt, including the point.
To allow the use of hydraulic tensioning equipment, larger dimension studs shall be often one diameter longer than "standard". That bolts to have plastic end cap protection.
THREADS OF STUD BOLTS
Bolts threading are defined in ASME B1.1 Unified Inch Screw Threads, (UN and UNR Thread Form). The most common thread is a symmetrical form with a V-profile. The included angle is 60°. This form is widely used in the Unified thread (UN, UNC, UNF, UNRC, UNRF) form as the ISO / metric threads. The advantage of a symmetrical threads is that they are easier to produce and inspect compared with non-symmetrical threads. These are typically used in general-purpose fasteners. Thread series cover designations of diameter/pitch combinations that are measured by the number of threads per inch (TPI) applied to a single diameter.
STANDARD THREAD PITCHES
Coarse thread series (UNC/UNRC) is the most widely used thread system and applied in most of the screws, bolts and nuts. Coarse threads are used for threads in low strength materials such as iron, mild steel, copper and softer alloy, aluminium, etc.. The coarse thread is also more tolerant in adverse conditions and facilitate quick assembly.
Fine thread series (UNF/UNRF) is commonly used in precision applications and in there where require a higher tensile strength than the coarse thread series.
8 - Thread series (8UN) is the specified thread forming method for several ASTM standards including A193 B7, A193 B8/B8M, and A320. This series is mostly used for diameters one inch and above.
Hex nuts (dimensional data) are defined in ASME B18.2.2, and even as bolts the threading in ASME B1.1. Depending on a customer specification, nuts must be both sites chamfered or with on one side a washer-face.
Dimensions of above mentioned nuts, can be found on page Heavy Hex Nuts of this website.
THE HEIGHT OF A NUT FOR A STUD BOLT IS THE SAME AS THE DIAMETER OF THE THREAD ROD
MATERIALS FOR STUD BOLTS
Dimensions from Stud Bolts are defined in the ASME B16.5 standard. The material qualities for studs are defined in the different ASTM standards, and are indicated by Grade. Frequently used grades are A193 for thread rods and A194 for the nuts.
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.
MARKING OF STUD BOLTS
Thread rods and nuts must be marked by the manufacturer with a unique identifier to identify the manufacturer or private label distributor, as appropriate. Below a number of ASTM examples.
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.
GRADE THREAD RODS
-195° to 102°C
ASTM A182 Gr. F304, F304L, F316, F316L, F321, F347
A320 Gr.B8 Class2
-101° to -47°C
ASTM A350 Gr.LF3
-46° to -30°C
ASTM A350 Gr.LF2
-29° to 427°C
428° to 537°C
ASTM A182 Gr.F11, F22
538° to 648°C
ASTM A182 Gr.F11, F22
A193 Gr.B8 Class1
649° to 815°C
ASTM A182 Gr. F304H, F316H
A193 Gr.B8 Class1
GRADE THREAD RODS
Compleate Information About Stainless Steel Full Thread Stud Bolt
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