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Home Page > Products > THREADED RODS & NUT > ASTM A193 B7/B7M > Studs ASTM A193 B7 / ASTM A194 2HPRODUCTS

Studs ASTM A193 B7 / ASTM A194 2H

Description

Standard: ASTM A193 B7—ASTM A194 2H
                   ASTM A193 B7M—ASTM A194 2HM
                   ASTM A320 L7—ASTM A194 GR.7
                   ASTM A320 L7M—ASTM A194 GR7M

MATERIAL: 1040,1045,4140,4142

Surface protection: Plain, Hot dip galvanized, Galvanization, Dacroment, Xylan .

Packing: Standard packing or According to customers' requirements

According to customers' Drawings and/or samples 

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


  • Studs ASTM A193 B7 / ASTM A194 2H
  • Stud bolts ASTM A193 B7—ASTM A194 2H
  • Threaded rods ASTM A193 B7
  • Socket cap fasteners Din 912
  • Din912 Socket cap fasteners
  • Din7991
  • A325/A563/F436 Heavy hex structural bolts
  • A490/A490M Heavy hex structural bolts
  • ASTM A325/325M/A490/490M
  • A325/A325M ZP Heavy hex structural bolts
  • A194 2H/2HM / A563 Heavy Hex Nuts
  • ASTM A307 Carriage Bolts
  • IFI Hex Cap Bolts
  • Din931
  • Din933
  • Din558
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