The ASTM A193 B8m Class 1 fasteners such as bolts and threaded studs are produced from AISI 304 grade stainless steel. Grade 304 specification Sa193 B8 Class 2 is the most common and widely used grade of stainless steel in the fastener industry. The tensile strength of the ASTM A193 Grade B8 Class 2 Bolts ranges between a minimum of 100 Ksi to 125 Ksi.
Table of Content
ASTM A193 B8m Class 2 Bolts have a high tensile strength as well as good corrosion properties which are inherited from the austenitic nature of the alloy. A193 B8 Class 1 specified Fasteners manufactured from this grade of austenitic stainless steel can be treated with carbide solution. Carbide solution treatment, also known as solution annealing, is a process where the fasteners like the ASTM A193 Gr B8m Studs or stainless bars are first treated by heating followed by water quenching. This ensures that the Sa193 B8 Cl.1 gains maximum corrosion resistance.
ASTM A193 B8m Nut is strain hardened after being treated to a solution of carbide. This solution treatment done on the A193-B8 Cl.2 helps them to achieve increased strength characteristics. Treating the A193 B8 Cl1 to carbide solution also reduces the potential for galling.
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
Standards |
Designation |
---|---|
ASTM |
A193 B8 Class 2: Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened |
ASTM A193 B8 Class 2 Fasteners |
Price |
Stainless Steel ASTM A193 B8 Class 2 Hex Bolt |
US$ 0.005-US$ 0.10 / Piece |
A193 B8 Class 2 B8 Class 2M(A) Stainless Steel ANSI Hex Heavy Bolt |
US$ 0.001-US$ 0.05 / Piece |
a193 B8 Class 2 a194 8 stud anti-theft bolt and nut price list |
US$ 0.971-US$ 1.44 / Kilogram |
ASTM A193 stainless steel SS316 B8 Class 2 B8 Class 2m stud bolt |
US$ 500.00-US$ 900.00 / Ton |
ASTM a193 B8 Class 2/B8 Class 2M hex bolt |
US$ 0.01-US$ 0.10 / Piece |
ASTM A193 Gr B8 Class 2 / B8 Class 2A Hex Heavy Structural Bolt |
US$ 0.012-US$ 0.05 / Piece |
stainless steel B8 Class 2 B8 Class 2m stud bolt astm a193 |
US$ 0.003-US$ 0.20 / Piece |
Standard size a193 B8 Class 2 a194 8 stud bolt and nut |
US$ 0.01 / Piece |
ASTM A193 B8 Class 2 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. |
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 |
1¼ |
179 |
417 |
596 |
1⅜ |
186 |
435 |
622 |
1½ |
246 |
574 |
821 |
19/16 |
168 |
392 |
560 |
1⅝ |
191 |
445 |
636 |
1¾ |
240 |
561 |
801 |
1⅞ |
298 |
696 |
994 |
2 |
366 |
853 |
1219 |
2¼ |
529 |
1234 |
1762 |
2½ |
733 |
1709 |
2442 |
2¾ |
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 |
1¼ |
243 |
565 |
808 |
1⅜ |
252 |
590 |
843 |
1½ |
334 |
778 |
1113 |
19/16 |
228 |
531 |
759 |
1⅝ |
259 |
603 |
862 |
1¾ |
325 |
761 |
1086 |
1⅞ |
404 |
944 |
1348 |
2 |
496 |
1157 |
1653 |
2¼ |
717 |
1673 |
2389 |
2½ |
994 |
2317 |
3311 |
2¾ |
1337 |
3118 |
4454 |
3 |
1748 |
4078 |
5826 |
TABLE 1 / TORQUE NM - ASTM A193 AND ASTM A320 GRADE B8, CL2 STUD 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 | - |
Grade |
Size |
Tensile ksi, min |
Yield, ksi, min |
Elong, %, min |
RA % min |
HBW |
HRC |
---|---|---|---|---|---|---|---|
B8 Class 2 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 B8 Class 2 Stud Bolt |
ASTM A193 B8 Class 2 Stud Bolts |
SS B8 Class 2 Step Bolt |
ASTM A 193 B8 Class 2 Stud Bolt |
Stainless Steel B8 Class 2 Threaded Rod |
B8 Class 2 Hanger Bolt |
ISO Approved ASTM A193 U Bolts |
Stainless Steel B8 Class 2 Studs Manufacturer |
ASTM A 193 B8 Class 2 Heavy Hex Bolts |
A193 B8 Class 2 Hex Nut |
ASTM A 193 Tie Rod |
ASTM A193 stud bolts Supplier |
Stainless Steel B8 Class 2 Draw Bolt Supplier |
B8 Class 2 Grub Screw |
ASTM A193 B8 Class 2 Anchor Bolt |
B8 Class 2 Shoulder Bolt |
B8 Class 2 Stainless Steel Stud bolts |
ASTM A 193 B8 Class 2 Studs Manufacturer |
ASTM A 193 B8 Class 2 Lag Bolt Exporter |
ASTM A193 B8 Class 2 Stud Bolts |
ASTM A 193 Eye Bolt Supplier |
SS B8 Class 2 Plow Bolt Distributor |
ASTM A193 B8 Cl2 |
ASTM A193 B8 Cl1 |
ASTM A193 And ASTM A320 Grade B8 Cl2 Stud Bolts |
A320 Gr B8 Class 2 |
ASTM A320 B8 Cl2 |
ASTM A320 Gr.B8 Cl.2 |
SA193 Nuts Exporter |
ASTM A193 J Bolt |