Threaded fasteners made of stainless steel of the AISI 300 series are covered by the ASTM A193 specification standard, including studs and bolts. B8 bolts and ASTM A193 B8M Bolts are comparable. The distinction is that B8M fasteners are made of stainless steel grade 316, whereas B8 fasteners are made of grade 304 stainless steel. India's top supplier of B8M studs.
Table of Content
Bolts according to ASTM A193 Grade B8M are constructed out of type 316 stainless steel, which resists corrosion better. Automobile and mechanical industries both frequently utilise ASTM A193 B8m Class 2 bolts. The high temperature and high pressure capabilities of ASTM A193 B8m Nuts make them suitable for use in process industries like chemicals and petroleum where pressure vessels are frequently used.
Austenitic stainless steel in the 304 and 316 grades is frequently used to make fasteners and is widely accessible in the market. The main components of the alloy that makes up grade 316 stainless steel are chromium, nickel, and molybdenum. The B8M Stud & ASTM A193 B8M Bolts' improved properties can be attributed to all of these metals. The A193 Gr B8m Material's excellent performance in terms of strength at high temperatures is another trait.
Due to the additional molybdenum in its alloy, Type 316 stainless steel offers superior corrosion resistance in comparison to grade 304. These fasteners are known as Marine grade stainless steel due to the excellent corrosion resistance of the A193 Gr B8m Material fasteners made from 316 grade stainless steel in marine, seawater, or brine environments.
A193 Gr B8m Material Class 1 fasteners must undergo carbide solution treatment, often known as solution annealing. A193 B8m fasteners are available in two classes. Fasteners that are A193 B8m Class 2 Bolts must undergo an additional strain hardening operation in order to be processed. The A193 B8m Stud Bolts alloy's tensile strength will increase as a result of this strain hardening process. In addition to boosting tensile strength, the hardening procedure helps make B8M Stud & A193 B8m Class 2 fasteners less prone to galling.
The ASTM A193 Gr B8m Studs Class 2 fasteners are labelled as B8MSH with the grade symbol highlighted, which is another way to distinguish between the two classes. Chemical and construction applications, as well as industries like petroleum, make extensive use of the Grade B8m Bolts specification.
ASTM A193 B8M Fasteners
|
Price
|
a193 B8M a194 8 stud anti-theft bolt and nut price list
|
US$ 0.971-US$ 1.44 / Kilogram
|
A193 B8/ B8M(A) Stainless Steel ANSI Hex Heavy Bolt
|
US$ 0.001-US$ 0.05 / Piece
|
ASTM a193 B8/B8M hex bolt
|
US$ 0.01-US$ 0.10 / Piece
|
stainless steel B8M B8Mm long stud bolt astm a193
|
US$ 1.60-US$ 1.63 / Piece
|
stainless steel B8M B8Mm stud bolt astm a193
|
US$ 0.003-US$ 0.20 / Piece
|
ASTM A193 stainless steel SS316 B8M B8Mm stud bolt
|
US$ 500.00-US$ 900.00 / Ton
|
ASTM A193 Gr B8M / B8MA Hex Heavy Structural Bolt
|
US$ 0.012-US$ 0.05 / Piece
|
Standard size a193 B8M a194 8 stud bolt and nut
|
US$ 0.01 / Piece
|
Standards
|
Designation
|
---|---|
ASTM
|
A193 B8M: Class 1 Stainless Steel, AISI 316
|
Dimensions
|
ASME B18.2.1, B18.3
|
---|---|
Melt Origin
|
South America/East Europe/JapanKorea/
|
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
**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
|
159.60
|
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.
|
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
|
1.1/8
|
127
|
297
|
424
|
1.1/4
|
179
|
417
|
596
|
1.3/8
|
186
|
435
|
622
|
1.1/2
|
246
|
574
|
821
|
1.9/16
|
168
|
392
|
560
|
1.5/8
|
191
|
445
|
636
|
1.3/4
|
240
|
561
|
801
|
1.7/8
|
298
|
696
|
994
|
2
|
366
|
853
|
1219
|
2.1/4
|
529
|
1234
|
1762
|
2.1/2
|
733
|
1709
|
2442
|
2.3/4
|
986
|
2300
|
3285
|
3
|
1289
|
3008
|
4297
|
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
|
1.1/8
|
172
|
403
|
575
|
1.1/4
|
243
|
565
|
808
|
1.3/8
|
252
|
590
|
843
|
1.1/2
|
334
|
778
|
1113
|
1.9/16
|
228
|
531
|
759
|
1.5/8
|
259
|
603
|
862
|
1.3/4
|
325
|
761
|
1086
|
1.7/8
|
404
|
944
|
1348
|
2
|
496
|
1157
|
1653
|
2.1/4
|
717
|
1673
|
2389
|
2.1/2
|
994
|
2317
|
3311
|
2.3/4
|
1337
|
3118
|
4454
|
3
|
1748
|
4078
|
5826
|
SPEC
|
GRADE
|
TEMPERATURE deg F (deg C)
|
|||||||||
650
|
700
|
750
|
800
|
850
|
900
|
950
|
1000
|
1050
|
1100
|
||
343
|
371
|
399
|
427
|
454
|
482
|
510
|
538
|
566
|
593
|
||
ASTM A193
|
B6
|
21.2
|
21.2
|
21.2
|
19.5
|
15.6
|
12
|
||||
ASTM A193
|
B7(*)
|
||||||||||
ASTM A193
|
B7M
|
25
|
25
|
23.6
|
21
|
17
|
12.5
|
8.5
|
4.5
|
||
ASTM A193
|
(*)
|
20
|
20
|
20
|
18.5
|
16.2
|
12.5
|
8.5
|
4.5
|
||
ASTM A193
|
B8-CL1
|
11.2
|
11
|
10.8
|
10.5
|
10.3
|
10.1
|
9.9
|
|||
ASTM A193
|
B8-CL2
|
25
|
|||||||||
ASTM A193
|
(* *)
|
25
|
25
|
25
|
25
|
23.5
|
20.5
|
16
|
11
|
6.3
|
2.8
|
ASTM A193
|
B16
|
||||||||||
ASTM A320
|
L7
|
25
|
25
|
||||||||
BS
|
B17B
|
20
|
19.8
|
19.8
|
19.8
|
19.7
|
19.7
|
19.6
|
19.4
|
19.3
|
16.6
|
ASTM 453
|
660
|
20.2
|
20.1
|
20
|
19.9
|
19.9
|
19.9
|
19.8
|
19.8
|
(*) FOR BOLT DIAMETERS < 2 1/2"
PLEASE NOTE THAT THE ABOVE VALUES ARE FOR REFERENCE PURPOSES ONLY. VALUES SHOULD BE EXTRACTED FROM ASME OR BS 5500.
(**) FOR BOLT DIAMETERS < 3/4"
MATERIAL
|
TEMPERATURE °C ( °F )
|
|
MIN.
|
MAX.
|
|
CARBON STEEL
|
-29 (-20)
|
300 (572)
|
B7, L7
|
-73 (-100)
|
400 (752)
|
B6
|
0 (32)
|
500 (932)
|
B8
|
-200 (-325)
|
575 (1067)
|
B16
|
0 (32)
|
520 (968)
|
B17B
|
-29 (-20)
|
650 (1202)
|
INC 718
|
0 (32)
|
750 (1382)
|
660
|
-29 (20)
|
538 (1000)
|
Element
|
B8M (AISI 316)
|
---|---|
Carbon
|
0.08% max
|
Manganese
|
2.00% max
|
Phosphorus, max
|
0.045%
|
Sulfur, max
|
0.030%
|
Silicon
|
1.00% max
|
Chromium
|
16.0 – 18.0%
|
Nickel
|
10.0 – 14.0%
|
Molybdenum
|
2.00 – 3.00%
|
Grade
|
Size
|
Tensile ksi, min
|
Yield, ksi, min
|
Elong, %, min
|
RA % min
|
HBW
|
HRC
|
---|---|---|---|---|---|---|---|
B8M Class 1
|
All
|
75
|
30
|
30
|
50
|
223 max
|
96 max
|
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
|
ASTM A193 Grand B8M Stud Bolt
|
ASTM A193 B8M Stud Bolts
|
Stainless Steel B8M Draw Bolt Supplier
|
B8M Grub Screw
|
B8M Stainless Steel Stud bolts
|
ASTM A 193 B8M Studs Manufacturer
|
ASTM A 193 B8M Lag Bolt Exporter
|
ASTM A193 B8M Stud Bolts
|
ASTM A 193 Eye Bolt Supplier
|
SS B8M Plow Bolt Distributor
|
SA193 Nuts Exporter
|
ASTM A193 J Bolt
|
SS B8M Step Bolt
|
ASTM A 193 B8M Stud Bolt
|
Stainless Steel B8M Threaded Rod
|
B8M Hanger Bolt
|
ISO Approved ASTM A193 U Bolts
|
Stainless Steel B8M Studs Manufacturer
|
ASTM A 193 B8M Heavy Hex Bolts
|
A193 B8M Hex Nut
|
ASTM A 193 Tie Rod
|
ASTM A193 stud bolts Supplier
|
ASME SA193 B8m Class 1
|
SA 193 Grade B8m
|
A193 Gr.B8m Cl.2
|
A193 B8m 316
|
ASTM A193 B8m 316l
|
Werkstoff A193 B8m
|
ASTM A193 B8 Anchor Bolt
|
B8 Shoulder Bolt
|
ASTM A193 B8M Anchor Bolt
|
B8M Shoulder Bolt
|