Email:info@htpipe.com

news

PRODUCT

Special Products
BW Fittings
Forged Fittings
Steel Pipe Tube
Flanges
Fasteners
Steel Sheet Plate
Round Bar
Welding Wire Electrodes
Prefabrication Pipe Spools

news

ASTM A193 B7 STUDS, ASTM A194 2H HEAVY HEX NUTS EXPORTER, ASTM A193 B7 DOUBLE ENDED STUD, ASTM A194 2H THREADED ROD, ASTM A193 B7 LOCK NUT SUPPLIER

share with

ASTM A193 is the standard specification for alloy-steel and stainless steel bolts used in high-temperature or high-pressure environments or other special-purpose applications. 
ASTM A194 is the standard specification for carbon and alloy steel nuts for bolts used in equivalent high-pressure or high-temperature environments.
ASTM A193 and A194 bolts and nuts from Glaser and Associates are available in a range of grades, including B7, B16 B8 and B8M to meet different design,
service conditions, mechanical properties, and high temperature requirements. ASTM A194 also covers the American Association State Highway and
Transportation Officials Standard AASHTO M-292.

These bolts and nuts are designed, manufactured and tested to comply with the standards set by ASTM A193 and A194 for chemical composition,
tensile and hardness properties and high temperature characteristics.

Grades

Grade

Material

B7

Alloy steel, AISI 4140/4142 quenched and tempered

B16

Alloy steel, Chromium-molybdenum-vanadium heat treated

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

B7, B8 and B8M are the most commonly used grades. The properties tables below provide more information on the differences between the grades.

Applications

The high-temperature, high-pressure performance of these bolts and nuts make them suitable for applications in process industries,
such as petroleum and chemicals where they are widely used in pressure vessels, valves, flanges, and fittings.

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

 

Up to 2-1/2

125

105

18

50

B16

2-5/8 - 4

110

95

17

45

 

4-1/8 - 7

100

85

16

45

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

 

Element

B7

B8

B8M

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%