ASTM A193 B8 Class 2 Bolts

ASTM A193 is a specification that covers bolting material, for instance, the A193 B8 Class 2 Heavy Hex Bolts for both alloy steel as well as stainless steel. Typically the specified ASTM A193 B8 Class 2 Fasteners have been designed for use in high temperature or/and high pressure applications.

check astm a193 b8 class 2 torque chart, Keep bulk stock of ASME SA193 Grade B8 Class 2 Bolts, B8 Class 2 Stud

ASTM A193 B8 Class 2 Bolts
ASTM A193 B8 Class 2 Bolts
Sa193 Grade B8 Class 2 Stud
Sa193 Grade B8 Class 2 Stud
 A193 B8 Class 2 Fasteners
A193 B8 Class 2 Fasteners

 Hence, the A193 B8 Class 2 Material is well suited to be used for pressure vessels, valves, flanges, fittings and for other special-purpose applications. While there are different grades covered under this specification, these grades are divided into two sub-categories i.e. class 1 and class 2. ASTM A193 B8 Cl1 indicates that the fastener has been carbide solution treated, whereas ASTM A193 Grade B8 Class 2 Bolts indicates that the fasteners are not only carbide solution treated but also strain hardened.

In terms of grades, B8 would mean the alloy belongs to austenitic grade 304. To exemplify, ASTM A193 B8 Class 2 Bolts are bolts made from grade 304 which are furnished in a carbide solution treated and strain hardened condition. Since the A193 B8 Cl2 Strain Hardened Studs fall under the austenitic classes of stainless steel, the specification guides the manufacturer with the elements in the chemistry. Hence, the ASME SA193 Grade B8 Class 2 Bolts needs to conform to the chemistry without the addition of an unknown element.

Moreover, the tensile property and hardness property requirements of the B8 CL2 Torque & Yield Strength have been discussed in this specification. Click here to download the astm a193 b8 class 2 torque chart.

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B8 Class 2 Bolts
B8 Class 2 Bolts
B8 Class 2d Bolt
B8 Class 2d Bolt

 

grade standard and specification of ASTM A193 B8 Class 2 Fasteners

Standards
Designation
ASTM
A193 B8 Class 2: Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened

 

Dimensions
ASME B18.2.1, B18.3
Melt Origin
East Europe/South America/Korea/Japan
Product Origin
Made in India
Threads Configuration
ASME B1.1 2A/3A Inch Unified Threads and B1.13M 6h Metric Coarse Threads
Certification
Dual Certified As per ASTM & ASME Codes
Additional Certifications
PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified
Mandatory Requirements
Free from Mercury & Radioactive Contamination
Additional Requirements
NACE MR0103 / MR0175 / ISO 15156 Compliance

 

Related ASTM Specifications

  • ASTM A193 / A193M – 16 : Standard Specification for High-Temperature Bolting, with Expansion Coefficients Comparable to Austenitic Stainless Steels
  • ASTM A1082 / A1082M – 16 : Standard Specification for High Strength Precipitation Hardening and Duplex Stainless Steel Bolting for Special Purpose Applications
  • ASTM F2281 : Standard Specification for Stainless Steel and Nickel Alloy Bolts, Hex Cap Screws, and Studs, for Heat Resistance and High Temperature Applications Designation
  • ASTM A1014 / A1014M – 16 : Standard Specification for Precipitation-Hardening Bolting (UNS N07718) for High Temperature Service
  • ASTM A962 / A962M – 16a : Standard Specification for Common Requirements for Bolting Intended for Use at Any Temperature from Cryogenic to the Creep Range
  • ASTM A638 / A638M : Standard Specification for Precipitation Hardening Iron Base Superalloy Bars, Forgings, and Forging Stock for High-Temperature Service

 

View B8 CL2 Torque & Yield Strength, Most Trusted ASTM A193 B8 Class 2 Fasteners, A193 B8 Class 2 Stud Bolts Suppliers

 

Torque chart of ASTM A193 B8 Class 2

TORQUE FT-LBS – ASTM A193 GRADE B8 Class 2 STUD BOLTS
BOLT
DIA
TORQUE FT-LBS
30% Initial
Torque
70%
Torque
100% Final
Torque
1/2
16
36
52
9/16
23
53
75
5/8
31
73
104
3/4
55
129
184
7/8
71
166
237
1
107
249
356
1⅛
127
297
424
179
417
596
1⅜
186
435
622
246
574
821
19/16
168
392
560
1⅝
191
445
636
240
561
801
1⅞
298
696
994
2
366
853
1219
529
1234
1762
733
1709
2442
986
2300
3285
3
1289
3008
4297

 

TORQUE NM – ASTM A193 GRADE B8 Class 2 STUD BOLTS
BOLT
DIA
TORQUE NM
30% Initial
Torque
70%
Torque
100% Final
Torque
1/2
22
49
71
9/16
31
72
102
5/8
42
99
141
3/4
75
175
249
7/8
96
225
321
1
145
338
483
1⅛
172
403
575
243
565
808
1⅜
252
590
843
334
778
1113
19/16
228
531
759
1⅝
259
603
862
325
761
1086
1⅞
404
944
1348
2
496
1157
1653
717
1673
2389
994
2317
3311
1337
3118
4454
3
1748
4078
5826
TABLE 1 / TORQUE NM – ASTM A193 AND ASTM A320 GRADE B8, CL2 STUD BOLTS

Notes:

  • Bolting torque to develop 50% Bolt Yield Stress at Nut Factor, K=0.16
  • This Table is applicable to Never-Seize paste and Fel-Pro lubricant, K=0.16.
  • The above Table is applicable only for ASTM A320 Grade B8, Class 2 and A193 Grade B8, Class 2 Stud Bolts. These are 304 SS material.
  • The torque values are approved for spiral wound graphite and PTFE filled gaskets, graphite sheet gaskets GHE and GHR types, ring joint, double jacketed and Camprofile gaskets.
  • The Final Torque Value accounts for 10% bolt relaxation.
  • The yield strength for strain-hardened bolts varies with diameter. Torque values for bolts greater than 1½ in. diameter are based on 30 ksi yield strength.

 

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Price of ASTM A193 B8 Class 2 Bolts

  • ASTM a193 B8 Class 2/B8 Class 2M hex bolt: Price US$ 0.01-US$ 0.10 / Piece
  • Standard size a193 B8 Class 2 a194 8 stud bolt and nut: Price US$ 0.01 / Piece
  • a193 B8 Class 2 a194 8 stud anti-theft bolt and nut price list: Price US$ 0.971-US$ 1.44 / Kilogram
  • Stainless Steel ASTM A193 B8 Class 2 Hex Bolt: Price US$ 0.005-US$ 0.10 / Piece
  • ASTM A193 stainless steel SS316 B8 Class 2 B8 Class 2m stud bolt : Price US$ 500.00-US$ 900.00 / Ton
  • stainless steel B8 Class 2 B8 Class 2m stud bolt astm a193 Price US$ 0.003-US$ 0.20 / Piece
  • A193 B8 Class 2 B8 Class 2M(A) Stainless Steel ANSI Hex Heavy Bolt: Price US$ 0.001-US$ 0.05 / Piece
  • ASTM A193 Gr B8 Class 2 / B8 Class 2A Hex Heavy Structural Bolt: Price US$ 0.012-US$ 0.05 / Piece
  • stainless steel B8 Class 2 B8 Class 2m long stud bolt astm a193: Price US$ 1.60-US$ 1.63 / Piece
  • Astm A193 B8 Class 2 hex bolt class 2 stainless steel : Price US$ 0.002-US$ 1.00 / Piece

Please note this is an approx Cost of B8 Class 2 bolts India. For final ASTM A193 Grade B8 Class 2 Bolts price list please mail us.

 

Size Chart of ASTM A193 B8 Class 2 Bolt

ASTM A193 B8 Class 2 Bolt Size Chart

 

Mechanical Properties Chart of ASTM A193 B8 Class 2 Bolts

Grade
Size
Tensile ksi, min
Yield, ksi, min
Elong, %, min
RA % min
HBW
HRC
B8M Class 2
Up to 3/4
110
95
15
45
321 max
35 max
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 Composition Standard of SA193 B8 Class 2 Bolts

Element B8 Class 2
Carbon 0 – 0.15%
Manganese 0 – 1.00%
Phosphorus, max 0 – 0.040%
Sulfur, max 0 – 0.03%
Silicon 0 – 1.00%
Chromium 11.5 – 13.5%
Nickel
Molybdenum

 

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Dimensions Chart of ASTM A193 B8 Class 2 Heavy Hex Bolt

ASTM A193 B8 Class 2 Heavy Hex Bolt Dimensions
Diameter (D)
Body Diameter (D)
 
Across the Flats (F)
 
Across the Corners ©
 
Head Height (H)
 
Thread Lengths (T)
 
 
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
< 6”
> 6”
1/2
0.515
0.482
0.875
0.85
1.01
0.969
0.364
0.302
1.25
1.5
5/8
0.642
0.605
1.062
1.031
1.227
1.175
0.444
0.378
1.5
1.75
3/4
0.768
0.729
1.25
1.212
1.443
1.383
0.524
0.455
1.75
2
7/8
0.895
0.852
1.438
1.394
1.66
1.589
0.604
0.531
2
2.25
1
1.022
0.976
1.625
1.575
1.876
1.796
0.7
0.591
2.25
2.5
1 1/8
1.149
1.098
1.812
1.756
2.093
2.002
0.78
0.658
2.5
2.75
1 1/4
1.277
1.223
2
1.938
2.309
2.209
0.876
0.749
2.75
3
1 3/8
1.404
1.345
2.188
2.119
2.526
2.416
0.94
0.81
3
3.25
1 1/2
1.531
1.47
2.375
2.3
2.742
2.622
1.036
0.902
3.25
3.5
1 3/4
1.785
1.716
2.75
2.662
3.175
3.035
1.196
1.054
3.75
4
2
2.039
1.964
3.125
3.025
3.608
3.449
1.388
1.175
4.25
4.5
2 1/4
2.305
2.214
3.5
3.388
4.041
3.862
1.548
1.327
4.75
5
2 1/2
2.559
2.461
3.875
3.75
4.474
4.275
1.708
1.479
5.25
5.5
2 3/4
2.827
2.711
4.25
4.112
4.907
4.688
1.869
1.632
5.75
6
3
3.081
2.961
4.625
4.475
5.34
5.102
2.06
1.815
6.25
6.5

 

Dimension Standard of ASTM A193 B8 Class 2 Hex Bolt

ASTM A193 B8 Class 2 Hex Bolt Dimensions

**All measurements in millimeters**

NOMINAL SIZE (D)
BODY DIAMETER
 
HEAD THICKNEASTM A193
 
ACROASTM A193 THE FLATS
 
ACROASTM A193 CORNERS
 
 
D (MAX)
D (MIN)
H (MAX)
H (MIN)
F (MAX)
F (MIN)
C (MAX)
C (MIN)
m10
10.00
9.78
6.63
6.17
17.00
15.73
18.48
17.77
m12
12.00
11.73
7.76
4.24
19.00
17.73
20.78
20.03
m14
14.00
13.73
9.09
8.51
22.00
20.67
24.25
23.35
m16
16.00
15.73
10.32
9.68
24.00
23.67
27.71
26.75
m20
20.00
19.67
12.88
12.12
30.00
29.16
34.64
32.95
m24
24.00
23.67
15.44
14.56
36.00
35.00
41.57
39.55
m30
30.00
29.67
19.48
17.92
46.00
45.00
53.12
50.85
m36
36.00
35.61
23.38
21.63
55.00
53.80
63.51
60.79
m42
42.00
41.38
26.97
25.03
65.00
62.90
75.06
71.71
m48
48.00
47.38
31.07
28.93
75.00
72.60
86.60
82.76
m56
56.00
55.26
36.2
33.80
85.00
82.20
98.15
93.71
m64
64.00
63.26
41.32
38.68
95.00
91.80
109.70
104.65
m72
72.00
71.26
46.45
43.55
105.00
101.40
121.24
115.60
m80
80.00
79.26
51.58
48.42
115.00
111.00
132.72
126.54
m90
90.00
89.13
57.74
54.26
130.00
125.50
150.11
143.07
m100
90.00
99.13
63.9
60.10
145.00
140.00
167.43
1

 

Most commonly used Fasteners Weight Chart

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