Specialized Supplier of SA193 Gr B8 Bolts and Studs in custom sizes in india, view B8 Class 2 Torque Chart

The ASTM A193 B8 is basically the standard material specification used for austenitic stainless steel that effectively resist corrosion. The ASTM A193 B8 Bolts have high tensile strength and they are ideal for high temperature and special purpose application. The astm a193 b8 stud bolts are generally found in pressure piping and pressure vessels. The ASME SA193 Grade B8 Hex Bolts are generally heat treated and work hardened. The B8 Screws material is an austenitic stainless steel which is divided into three classes, class 1, class 2, and class 2B. The difference between astm a193 b8 class 1 vs class 2 and class 2B is that each of them comes with distinct tensile strength.
The sa 193 gr b8 chemical composition has elements like carbon, sulfur, manganese, nickel, chromium, etc., in its alloy. It is due to this composition that the astm a193 grade b8 bolts possess high strength and hardness.
The astm a193 b8 threaded rod can effectively resist the marine environment, which means they can withstand chloride related stress corrosion cracking. The A193 B8 Heavy Hex Bolts have high nickel content which makes them capable of giving good performances, even at elevated temperatures.
The A193 Gr. B8 Socket Head Cap Screws are also available in Gr.8m variant, which comes with better oxidation resistance. It also has better creep strength and resistance to pitting and crevice corrosion compared to the A193 B8 Washer material. It is also to be noted that on getting exposed to higher temperature, the astm a193 gr b8 bolt would decay faster than the gr 8m material.
The SA193 B8 Threaded Rod is available in various surface finishes like Zinc Aluminium Flake Coating, Ptfe Coated Silicon Bronze coating, Manganese Phosphate coating, etc.The surface finishes help increases the longevity of SA193 B8 Studs and help it sustain for long along with giving optimum performances.
The ASME SA193 B8 Nuts have higher tensile and yield strength compared to the B7 bolts, and other stainless steel grades. The A193 B8 Heavy Hex Bolts are available in different classes. The ASTM A193 B8 Class 1 Bolts require carbide solution treatment, whereas the class 2 products undergo additional strain hardening operations. Thus increases the strength of the A193 B8 Studs and reduces their galling susceptibility.
It is essential to use high quality A193 B8 Material to manufacture efficient products. Full customization of shapes, and dimensions are available on the A193 Gr B8 Bolts. Also, the packaging and delivery of the Hex Bolt A193 B8 should be properly done and it is to be supplied at an affordable price.
Dimensions | ASME B18.3, B18.2.1 |
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Melt Origin | East Europe/South America/JapanKorea |
ASME/ ANSI | ANSI B18.2.1, B18.3, DIN 931/ 933 |
Hex Bolt Inch Size |
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ASTM A193 B8 Bolts Metric Size |
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Hex Bolt Metric Size |
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Stud Metric Size |
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Studs Inch sizes |
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Hex Nut (DIAMETER) |
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Plain Washer (DIAMETER) |
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ASTM A193 B8 Description | ASTM A193 B8 Price |
ASTM A193 B8 B8m DIN976 Stud Bolt /Thread Rod | US $ 0.1-0.5 / Piece |
ASTM A193 Gr. B8 Threaded Rod | US $ 0.172-0.198 / Piece |
ASME A193 B18.2.1 B8 Threaded Rod | US $ 0.17-1.56 / Piece |
B8 Stud Bolts | US $ 0.1-1 / Piece |
A193 B8 Class 1 Stainless Steel Threaded Bar | US $ 2500-2600 / Ton |
ASTM A193 B8/B8m Hex Bolt | US $ 0.01-1 / Piece |
ASTM A193 Gr B8 B8m Double End Stud Bolt | US $ 0.15 / Piece |
ASTM A193 B8 Hex Bolt and Nut Washer Fasteners | US $ 0.08-0.12 / Piece |
ASTM A193 B8 Property |
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Class 2 |
Class 1 |
Class 2B |
buy directly from manufacturer of ASME SA193 Grade B8 Hex Bolts and threaded rod online and save cost, Check Astm A193 B8 Class 1 Vs Class 2

ASTM A193 B8 Bolts

ASME SA193 Grade B8 Hex Bolts

Astm A193 B8 Stud Bolts

Astm A193 B8 Class 1 Bolts

SA193 B8 Threaded Rod

A193 B8 Heavy Hex Bolts

A193 B8 Washer

ASME SA193 B8 Nuts
Are you looking for A193 Gr. B8 socket head cap screws and washers in the exact size ? View our selection online.
Specification of Nut | Specification of Washer |
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ASTM A194 Grade 8 | ASTM A240 TP304 |

NOMINIAL SIZE (D) | ACRO ASTM THE FLATS | HEAD THICKNESS | BODY DIA. | ACRO CORNERS | ||||
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F (MAXIMUM) | F (MINIMUM) | H (MAXIMUM) | H (MINIMUM) | D (MAXIMUM) | D (MINIMUM) | C (MAXIMUM) | C (MINIMUM) | |
m20 | 30.000 | 29.016 | 12.088 | 12.012 | 20.000 | 19.067 | 34.064 | 32.095 |
m14 | 22.000 | 20.067 | 9.009 | 8.051 | 14.000 | 13.073 | 24.025 | 23.035 |
m10 | 17.000 | 15.073 | 6.063 | 6.017 | 10.000 | 9.078 | 18.048 | 17.077 |
m16 | 24.000 | 23.067 | 10.032 | 9.068 | 16.000 | 15.073 | 27.071 | 26.075 |
m30 | 46.000 | 45.000 | 19.048 | 17.092 | 30.000 | 29.067 | 53.012 | 50.085 |
m24 | 36.000 | 35.000 | 15.044 | 14.056 | 24.000 | 23.067 | 41.057 | 39.055 |
m12 | 19.000 | 17.073 | 7.076 | 4.024 | 12.000 | 11.073 | 20.078 | 20.003 |
m100 | 145.000 | 140.000 | 63.09 | 60.010 | 90.000 | 99.013 | 167.043 | 159.060 |
m36 | 55.000 | 53.080 | 23.038 | 21.063 | 36.000 | 35.061 | 63.051 | 60.079 |
m48 | 75.000 | 72.060 | 31.007 | 28.093 | 48.000 | 47.038 | 86.060 | 82.076 |
m56 | 85.000 | 82.020 | 36.02 | 33.080 | 56.000 | 55.026 | 98.015 | 93.071 |
m42 | 65.000 | 62.090 | 26.097 | 25.003 | 42.000 | 41.038 | 75.006 | 71.071 |
m64 | 95.000 | 91.080 | 41.032 | 38.068 | 64.000 | 63.026 | 109.070 | 104.065 |
m80 | 115.000 | 111.000 | 51.058 | 48.042 | 80.000 | 79.026 | 132.072 | 126.054 |
m72 | 105.000 | 101.040 | 46.045 | 43.055 | 72.000 | 71.026 | 121.024 | 115.060 |
m90 | 130.000 | 125.050 | 57.074 | 54.026 | 90.000 | 89.013 | 150.011 | 143.007 |
ASTM A193 B8 Class | Grade Symbol | Manufacturer's Mark |
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Class 2 | B8SH | Jignesh Steel |
Class 1D | B94 | |
Class 1 | B8 | |
Class 2B | B9 |
We can assist with all ASME SA193 B8 Nuts and A193 B8 Heavy Hex Bolt supply needs. Offer Authentic A193 B8 Material Price
(D) Diameter | (F)Across the Flats | (D) Body Diameter | (H) Head Height | Across the Corners © | (T) Thread Lengths | |||||
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MAXIMUM | MINIMUM | MAXIMUM | MINIMUM | MAXIMUM | MINIMUM | MAXIMUM | MINIMUM | < 6” | > 6” | |
5/8 | 1.0062 | 1.0031 | 0.0642 | 0.0605 | 0.0444 | 0.0378 | 1.0227 | 1.0175 | 1.05 | 1.075 |
3/4 | 1.025 | 1.0212 | 0.0768 | 0.0729 | 0.0524 | 0.0455 | 1.0443 | 1.0383 | 1.075 | 2 |
7/8 | 1.0438 | 1.0394 | 0.0895 | 0.0852 | 0.0604 | 0.0531 | 1.066 | 1.0589 | 2 | 2.025 |
1/2 | 0.0875 | 0.085 | 0.0515 | 0.0482 | 0.0364 | 0.0302 | 1.001 | 0.0969 | 1.025 | 1.05 |
1 1/8 | 1.0812 | 1.0756 | 1.0149 | 1.0098 | 0.078 | 0.0658 | 2.0093 | 2.0002 | 2.05 | 2.075 |
1 | 1.0625 | 1.0575 | 1.0022 | 0.0976 | 0.07 | 0.0591 | 1.0876 | 1.0796 | 2.025 | 2.05 |
1 1/4 | 2 | 1.0938 | 1.0277 | 1.0223 | 0.0876 | 0.0749 | 2.0309 | 2.0209 | 2.075 | 3 |
2 3/4 | 4.025 | 4.0112 | 2.0827 | 2.0711 | 1.0869 | 1.0632 | 4.0907 | 4.0688 | 5.075 | 6 |
1 1/2 | 2.0375 | 2.03 | 1.0531 | 1.047 | 1.0036 | 0.0902 | 2.0742 | 2.0622 | 3.025 | 3.05 |
1 3/8 | 2.0188 | 2.0119 | 1.0404 | 1.0345 | 0.094 | 0.081 | 2.0526 | 2.0416 | 3 | 3.025 |
1 3/4 | 2.075 | 2.0662 | 1.0785 | 1.0716 | 1.0196 | 1.0054 | 3.0175 | 3.0035 | 3.075 | 4 |
2 1/4 | 3.05 | 3.0388 | 2.0305 | 2.0214 | 1.0548 | 1.0327 | 4.0041 | 3.0862 | 4.075 | 5 |
2 | 3.0125 | 3.0025 | 2.0039 | 1.0964 | 1.0388 | 1.0175 | 3.0608 | 3.0449 | 4.025 | 4.05 |
2 1/2 | 3.0875 | 3.075 | 2.0559 | 2.0461 | 1.0708 | 1.0479 | 4.0474 | 4.0275 | 5.025 | 5.05 |
3 | 4.0625 | 4.0475 | 3.0081 | 2.0961 | 2.006 | 1.0815 | 5.034 | 5.0102 | 6.025 | 6.05 |
ASTM A193 B8 Class | Heat Treatment Procedure |
Class 2 | Strain Hardened And Carbide Solution Treatment |
Class 1 | Carbide Solution Treatment |
Class 2B | Strain Hardened And Carbide Solution Treatment |
TORQUE | |||
ASTM A193 B8 BOLTS DIAMETER |
TORQUE FT-LBS | ||
70% Torque |
30% Initial Torque |
100% Final Torque |
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9/16 | 53 | 23 | 75 |
1/2 | 36 | 16 | 52 |
5/8 | 73 | 31 | 104 |
7/8 | 166 | 71 | 237 |
3/4 | 129 | 55 | 184 |
1 | 249 | 107 | 356 |
1¼ | 417 | 179 | 596 |
1⅜ | 435 | 186 | 622 |
1⅛ | 297 | 127 | 424 |
1½ | 574 | 246 | 821 |
1⅝ | 445 | 191 | 636 |
19/16 | 392 | 168 | 560 |
1¾ | 561 | 240 | 801 |
2 | 853 | 366 | 1219 |
1⅞ | 696 | 298 | 994 |
2¼ | 1234 | 529 | 1762 |
2¾ | 2300 | 986 | 3285 |
2½ | 1709 | 733 | 2442 |
3 | 3008 | 1289 | 4297 |
Product | ISO | UNI | DIN | ASME | |
Metric | Imperial | ||||
Hex Bolts | 4014 | 5737 | 931 | B18.2.3.5M | B18.2.1 |
Studs | -- | 6610 | 976 | B18.31.1M | B18.31.2 |
Hex Cap Screws | 4017 | 5739 | 933 | B18.2.3.1M | B18.2.1 |
Heavy Hex Bolts | 7412 | 5712 | 6914 | B18.2.3.7M | B18.2.1 |
Set Screws | 4029 | 5929 | 916 | B18.3.1M | B18.3 |
Socket Head Cap Screws | 4762 | 5931 | 912 | B18.3.1M | B18.3 |
Hex Nuts | 4032 | 5588 | 934 | B18.2.4.1M | B18.2.2 |
Countersunk Screws | 10642 | 5933 | 7991 | B18.3.1M | B18.3 |
Heavy Hex Nuts | 4775 | 5713 | 6915 | B18.2.4.6M | B18.2.2 |
We Promise to Deliver Astm A193 B8 Fasteners with All Documents, Including Mill Certificate, as Fast as Possible
ASTM A193 B8 Metric Sizes | |||
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Diameter | Class | Hardness, max | |
M48 and under | 2B | 321 HBW | 35 HRC |
Over M48 to M64, incl. | |||
Over M64 to M72, incl. | |||
All Diameters | 1 | 223 HBW | 96 HRB |
M20 and under | 2 | 321 HBW | 35 HRC |
Over M20 to M24, incl. | |||
Over M24 to M30, incl. | |||
Over M30 to M36, incl. |
Inch Sizes | |||
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Diameter | Class | Hardness, max | |
All Diameters | 1 | 223 HBW | 96 HRB |
Over ¾ to 1, incl. | 2 | 321 HBW | 35 HRC |
3/4 and under | |||
Over 1-1/4 to 1-1/2, incl. | |||
Over 1 to 1-1/4, incl. | |||
Over 2 to 2-1/2, incl | 2B | 321 HBW | 35 HRC |
.2 and under | |||
Over 2-1/2 to 3, incl. |

ASTM A193 B8 Bolt Full Thread Fastener
Mitsubishi Chemical Taiwan Co., Ltd. Taiwan

ASTM A193 Grade B8 Stainless Threaded Rods
CLARUS Technology, Brazil

ASTM A193 B8 B8m Stud Bolts
Avril, France
Element | Austenitic Stainless Steel |
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Composition A, % | |
AISI 304 / 304L | |
Nickel | 8.00 to 11.00 |
Manganese | 2.00 |
Carbon | 0.08 maximum |
Phosphorus | 0.045 maximum |
Silicon | 1.00 maximum |
Sulfur | 0.030 maximum |
Chromium | 18.00 to 20.00 |
Size | RA % min | Yield, ksi, min | Tensile ksi, min | Elong, %, min | |
All | B8 Class 1 | 50 | 30 | 75 | 30 |
1-1/8 TO 1-1/4 | B8 Class 2 | 35 | 65 | 105 | 20 |
7/8 TO 1 | 35 | 80 | 115 | 15 | |
Up to 3/4 | 35 | 100 | 125 | 12 | |
1-3/8 TO 1-1/2 | 45 | 50 | 100 | 28 |
- Agriculture equipment
- Spiral Cases and penstocks in power plants
- in bridges and other structural steel works
- Offshore industries
- Automobile industry
- Transportation equipment
- Pylons and other architectural structures