The ASTM A193 specification standard covers threaded fasteners like studs and bolts that have been manufactured from AISI 300 series grade stainless steel. ASTM A193 B8M Bolts are similar to B8 bolts. The difference being that B8M fasteners are produced from 316 grade stainless steel whereas B8 fasteners are manufactured from grade 304 stainless steel. Leading Supplier of B8M Stud in India.
Table of Content
B8M Stud
ASTM A193 Grade B8M bolts are made from a more corrosion-resistant type 316 stainless steel. ASTM A193 B8m Class 2 Bolts are widely used in various industries like automobile and mechanical. ASTM A193 B8m Nut have high-temperature, high-pressure performance of these bolts and nuts make them suitable for applications in process industries, such as chemicals and petroleum where they are widely used in pressure vessels.
Both 304 & 316 grades are common grades of austenitic stainless steel used in the production of fasteners and are easily available in the markets. The alloy of grade 316 stainless steel primarily constitutes of elements like chromium, nickel and molybdenum. All of these metals are responsible for the enhanced characteristics of the B8M Stud & ASTM A193 B8M Bolts. Another feature of the A193 Gr B8m Material is its good performance in terms of its strength at elevated temperatures.
In comparison to grade 304, Type 316 stainless steel offers superior corrosion resistance due to the added molybdenum in its alloy. Because of the excellent corrosion resistance of the A193 Gr B8m Material fasteners made from 316 grade stainless steel in marine, seawater or brine environments, these fasteners are known as Marine grade stainless steel.
A193 B8m fasteners are available in two classes - A193 Gr B8m Material Class 1 fasteners are required to undergo carbide solution treatment, otherwise known as solution annealing.A193 B8m Class 2 Bolts fasteners are required to be processed by getting an additional strain hardening operation. This strain hardening operation will increase the tensile strength of the A193 B8m Stud Bolts alloy. Apart from an increase in the tensile strength, the hardening process aids in reducing the B8M Stud & A193 B8m Class 2 fasteners from being susceptible to galling.
Another point to distinguish both these classes is that the ASTM A193 Gr B8m Studs Class 2 fasteners are marked as B8MSH with the grade symbol being underlined.The Grade B8m Bolts specification is heavily utilized in industries like petroleum as well as in chemical and construction applications.
ASTM A193 B8M Fasteners |
Price |
A193 B8/ B8M(A) Stainless Steel ANSI Hex Heavy Bolt |
US$ 0.001-US$ 0.05 / Piece |
a193 B8M a194 8 stud anti-theft bolt and nut price list |
US$ 0.971-US$ 1.44 / Kilogram |
stainless steel B8M B8Mm long stud bolt astm a193 |
US$ 1.60-US$ 1.63 / Piece |
ASTM a193 B8/B8M hex bolt |
US$ 0.01-US$ 0.10 / Piece |
ASTM A193 stainless steel SS316 B8M B8Mm stud bolt |
US$ 500.00-US$ 900.00 / Ton |
stainless steel B8M B8Mm stud bolt astm a193 |
US$ 0.003-US$ 0.20 / Piece |
Standard size a193 B8M a194 8 stud bolt and nut |
US$ 0.01 / Piece |
ASTM A193 Gr B8M / B8MA Hex Heavy Structural Bolt |
US$ 0.012-US$ 0.05 / 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
ASTM A193 B8M Hex Bolt Dimension
**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 |
Other Types Of ASTM A193 B8M Bolts
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 |