ASTM A193 B7 All Threaded Stud Bolts

ASTM A193/A193M B7 All Threaded Stud Bolts

API 6A 6D Flange Valve Wellhead ASME/ANSI Flange All Thread Stud Bolts

Alloy steel bolting for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications.

Standard: IFI-136, ASME B16.5, DIN976

Inch Size: 1/4”-4” with various lengths

Metric Size: M6-M100 with various lengths

Other Available Grade: ASTM A193/A193M B7, B7M, B16, B8 Class 1 & 2, B8M Class 1 & 2; ASTM A320/A320M L7, L7M, L43, B8 Class 1 & 2, B8M Class 1 & 2, and so on.

Finish: Plain, Black Oxide, Zinc Plated, Zinc Nickel Plated, Cadmium Plated, PTFE etc.

Packing: Bulk about 25 kgs each carton, 36 cartons each pallet

Advantage: High Quality and Strict Quality Control, Competitive Price,Timely Delivery; Technical Support, Supply Test Reports

Please feel free to contact us for more details.

ASTM A193

Scope

Originally approved in 1936, this specification is heavily utilized in petroleum and chemical construction applications.  The ASTM standard covers alloy steel and stainless steel bolting materials for high temperature service. This specification includes fasteners intended for use in pressure vessels, valves, flanges, and fittings. Although, this material 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.

Below is a basic summary of a few of the common grades. ASTM A193 covers a number of other standard specifications not covered in this description including B5, B6, and B16.

Grades

B7 Alloy steel, AISI 4140/4142 quenched and tempered
B8 Class 1 Stainless steel, AISI 304, carbide solution treated.
B8M Class 1 Stainless steel, AISI 316, carbide solution treated.
B8 Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened
B8M Class 2 Stainless steel, AISI 316, carbide solution treated, strain hardened

Mechanical Properties

Grade Size Tensile ksi, min Yield, ksi, min Elong, %, min RA % min
B7 Up to 2-1/2 125 105 16 50
2-5/8 - 4 115 95 16 50
4-1/8 - 7 100 75 18 50
B8 Class 1 All 75 30 30 50
B8M Class 1 All 75 30 30 50
B8 Class 2 Up to 3/4 125 100 12 35
7/8 - 1 115 80 15 35
1-1/8 - 1-1/4 105 65 20 35
1-3/8 - 1-1/2 100 50 28 45
B8M Class 2 Up to 3/4 110 95 15 45
7/8 - 1 100 80 20 45
1-1/8 - 1-1/4 95 65 25 45
1-3/8 - 1-1/2 90 50 30 45

Recommended Nuts and Washers

Bolt Grade Nuts Washers
B7 A194 Grade 2H F436
B8 Class 1 A194 Grade 8 SS304
B8M Class 1 A194 Grade 8M SS316
B8 Class 2 A194 Grade 8 SS304
B8M Class 2 A194 Grade 8M SS316

Strain hardened nuts available as a supplementary requirement

Testing Lab

Workshop

Warehouse


  • ASTM A193 B7 All Threaded Stud Bolts Related Video:



    This video is the result of a project conducted by the University of Washington and the University of Illinois Urbana-Champaign. The research was funded by the National Science Foundation through the NEES Research Program and by the Charles Pankow Foundation. Visit https://www.youtube.com/user/NEESRWallProject for more videos or https://nees.org/groups/nees_2005_0104/wiki for additional information on the project.

    This video shows the damage to reinforced concrete planar wall (rectangular cross-section) specimen PW2, tested as part of the NEESR Complex Wall Project. The specimen reached a drift of 1.5% at the top of the third floor (corresponding to a drift of 1.9% at the 10th floor (see below)) prior to fail at 1.05% drift in the opposite loading direction due to a compressive failure (extensive bar buckling and core crushing) of the left boundary element.

    The image shows the bottom story (3 feet) of a 3-story 1/3 scale specimen. The wall is 10 feet long and 6 inches thick. Longitudinal reinforcement is concentrated in boundary elements and spliced in the lower half of the first floor. Lateral and overturning forces were applied to simulate the base reactions of a 10-story wall with a uniform lateral force distribution. A cyclic displacement history was applied to the walls.

    The bottom center figure shows the base moment vs 3rd drift. Figures to the left and right indicate the progression of yield under compressive and tensile strains, respectively. An open circle indicates a strain gauge that reached the yield strain of the steel. A filled circle indicates a strain gauge that has reached the strain hardening strain. A triangle indicates yield stress of the steel was reached without the yield strain having been reached. The color of the marker indicates if yield of the gauge occurred first in tension (red) or compression (blue). The solid lines represent the floor levels and the dashed line indicates the top of the spliced region.



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