USS Flat Washers Price - ASTM A193 B7 All Threaded Stud Bolts – Dingshen Metalworks

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 or high pressure 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


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