Bulong Stud Bolts - Guzong

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Stud Bolt With A193 B7 , A194 2H PTFE Coated

  • Quy cách / Size: M8 - M42
  •  Chiều dài / Length: L = 20 - 500 mm 
  •  Bảo vệ ăn mòn / Surface treatments

            * Đen mộc / Plain           

            * Xi đen / Black oxide           

            * Mạ kẽm điện / Electric zinc coatings

            * Mạ kẽm nhúng nóng / Hot dip galvanize 

            * Mạ Dacro / Dacro coatings

             * Mạ Fluorocarbon / Fluorocarbon plated

            * Mạ Flour ethylene / Flour ethylene plated 

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

Chemical Properties

Element

B7 (AISI 4140)

B8 (AISI 304)

B8M (AISI 316)

Carbon

0.37 - 0.49%

0.08% max

0.08% max

Manganese

0.65 - 1.10%

2.00% max

2.00% max

Phosphorus, max

0.035%

0.045%

0.045%

Sulfur, max

0.040%

0.030%

0.030%

Silicon

0.15 - 0.35%

1.00% max

1.00% max

Chromium

0.75 - 1.20%

18.0 - 20.0%

16.0 - 18.0%

Nickel

 

8.0 - 11.0%

10.0 - 14.0%

Molybdenum

0.15 - 0.25%

 

2.00 - 3.00%

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

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