8 Reasons Buyers Choose Vision Alloys for ASTM A193 B8M Bolts

M3 to M150

Wide Metric Size Range

UNS S31600

Certified Molybdenum Grade

20+ Countries

Trusted Global Exporter

EN 10204/3.1B

Mill Test Certification

-198°C to 800°C

Wide Service Temperature

Class 1 & 2

Both Heat Treatments Stocked

ASME & DIN

Standards Compliant Bolting

Direct Factory Price

No Middleman Markup

ASTM A193 B8M Bolts Specification

ASTM A193 B8M Bolts Snapshot

Metric RangeM3 to M150
Imperial Range3/4″ to 1-1/2″
Length3mm to 200mm
StandardASTM A193, ASME SA193
MTCEN 10204/3.1B
EnvironmentSalt Water & Mild Acids
Thread TypeUNJ, UNC, UNF, UNR
Temp. Range-198°C to 800°C
To know about the latest price list of ASTM A193 B8M Bolts, please Contact Us →

CE Approved ASME SA193 Gr B8M Class 1 and 2 Studs Bolt Manufacturer in India With MTC EN 10204 3.1

Vision Alloys exports fasteners to Saudi Arabia and Germany. We are a leading stockist, supplier and manufacturer in India. lobal buyers trust our export quality and delivery timelines. Singapore, Qatar, Brazil and Senegal receive regular shipments too. Fasteners available in stainless steel, nickel alloys and duplex. Vision Alloys maintains full ISO certified quality systems. Bolts, stud bolts, nuts and washers all supplied together.

We supply ASTM A193 B8M Bolts across 25+ countries worldwide. Our bolts are PED approved and CE certified products. Stock includes A193 B8M Class 1 Stud Bolts in bulk. Chemical industries rely on B8M bolts for corrosion resistance. Water treatment facilities use B8M for long service life.

 

ASTM A193 B8M Class 2 Flange Bolts

ASTM A193 B8M Class 2 Flange Bolts

  • Serrated Washer Face
  • Sizes M10 to M110
  • ASME B16.5 Flange Joints
A193 Gr B8M Countersunk Bolts

A193 Gr B8M Countersunk Bolts

  • Flush Mounted Head
  • Slotted & Phillips Drive
  • Smooth Surface Finish Fit
ASME SA 193 Gr B8M Heavy Hex Bolts

ASME SA 193 Gr B8M Heavy Hex Bolts

  • ASME B18.2.2 Wide Head
  • Class 1 & Class 2 Available
  • High Torque Flange Duty

 

ASTM A193 B8M Bolt Specification
Bolts Size
SA 193 B8M Fasteners Size
  • 3/4″ to 1-1/2″
Metric Size
ASTM A193 B8M Bolts Metric Size
  • Size: M02 to M160

 

 Length
A193 Gr B8M Nut Hardness
  • 321HBW
 Thread Pitch
A193 Gr B8M Welded Stud Bolt Thread Pitch
  • Fine
  • Coarse
 Manufacturing Methods
B8M Threaded Rod Manufacturing Methods
  • Cold Forging
  • CNC Machined
  • Hot Forging
Form
B8M Stainless Steel Studs Form
  • A
  • D
  • C
  • G
  • B
  • E

 

Temperature
SA 193 B8M Fully Threaded Studs Melting Point
  • 1371-1399°C
 Standards
B8M Studs ASTM Standards
  • ASME SA 193
  • ASTM A193
Material
A193 Grade B8m Stud Bolt Packaging Option
  • Canton
  • Wooden Pallet
  • Carton

 

Finish
ASME SA193 B8m Threaded Rod Surface Finish
  • Plain, Electric galvanized
  • Phosphating, Zinc impregnation
  • Oxidation, DACROMET
Machines
A193 B8M Class 1 Stud Bolts Machines
  • CNC Lath
  • Thread Rolling
  • Making Machines
Testing
A193 B8M Class 1 Hex Bolts Testing
  • 100% Tested ASTM A193 B8M Bolts with MTC EN 10204 3.1/3.2

 

Thread Types
SA 193 Gr B8m Threaded Rod Thread Types
  • UNC
  • UN8
  • BSW
  • UTS
  • ACME
  • UNF
  • UNR
  • UNM
  • BSF

 

Fastener Types
ASTM A193 B8M Bolts Types
  • hex bolt
  • bolt
  • nuts
  • threaded rod
  • screws
  • washers
  • stud bolt

 

Value Added Services
A193 B8M Class 1 Stud Bolts Value Added Services
  • Bagging
  • Head Shank Drilling
  • Thread Locking
  • Head Painting
 Drive Style
ASME SA193 Gr B8M Screws Drive Types
  • Oval
  • Hexagon washer
  • Pan
  • Cross
  • Truss
  • Torx
  • Round
  • Hex

 

 Head Types
A193 Grade B8M Fasteners Head Types
  • Truss
  • Flat
  • Phillips Drive
  • Socket cap head
  • Button head
  • Slotted Drive
  • Combination Drive
  • Slotted hex washer
  • Hex washer head
  • Frearson Drive
  • Pan
  • Hex head
  • Oval
 Thread Class
Stud A193 B8M Class
  • 5 CSF
  • Class 2A (Medium fit)
  • 2G
  • custom
  • 5 ONF
  • 3G
  • 4G
  • 8G
  • Class 1A (Loose fit)
  • 6G
  • Class 3A (Tight fit)
  • 5 HF

 

Request For Quote

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Buy A193 B8M Class 1 and Class 2 Stud Bolts at Low Cost Worldwide

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Grade & Type Guide

B8M Stud Bolt Grade and Type Guide




ASTM A193 B8M Cl.1Grade
S31600UNS
30 / 75 ksiYield / Tensile
Solution AnnealedHeat Treatment

Full Thread Stud Bolt

M6–M100, ASME B18.31.3

Heavy Hex Bolt

ASME B18.2.2 head

Flange Bolt

Chemical plant piping

U Bolt

Pipe support clamps

ASTM A193 B8M Cl.2Grade
S31600UNS
95 / 110 ksiYield / Tensile
Strain HardenedHeat Treatment

Full Thread Stud Bolt

Diameter ≤ M20

Heavy Hex Bolt

High torque flange joints

Flange Bolt

Marine & offshore use

U Bolt

High load pipe support

ASTM A193 B8M Cl.2Grade
S31600UNS
80 / 100 ksiYield / Tensile
Strain HardenedHeat Treatment

Full Thread Stud Bolt

Diameter M20–M30

Heavy Hex Bolt

Pharma & chemical flanges

Flange Bolt

Refinery piping joints

U Bolt

Medium load clamps

ASTM A193 B8M Cl.2Grade
S31600UNS
50 / 90 ksiYield / Tensile
Strain HardenedHeat Treatment

Full Thread Stud Bolt

Diameter M30–M36

Heavy Hex Bolt

Large diameter flanges

Flange Bolt

Structural piping racks

U Bolt

Heavy duty support

Supplier and Stockist of ASTM A193 B8M Class 2 Hex Bolt in Different Sizes M8, M10, M12 and M20

ASTM A193 Gr B8M Fasteners Size Chart

ISO Certified ASTM A193 B8M Bolts Manufacturer in India, offers various sizes with third-party inspection to the USA, Europe, Morocco, Australia and UK

Dia Length
Hex Bolt M10 – M110 (1/2″ – 4.0″) 12 – 1200mm (1/2″ – 52″)
Stud Bolt M10 – M110 (1/2″ – 4.1/2″) 12 mm – 6000 mm (1/2″ – 236″)
Eye Bolts M10 – M48
Hex Nut M6 – M110 (1/4″ – 4.5″)
Plain Washer M6 – M110 (1/2″ – 4.1/2″)

 

Price List of SA 193 Gr B8M Stud Bolt
$

Price List

Price List of ASTM A193 B8M Bolts

ASTM A193 B8M Bolts Manufacturer, Buy Class 1 and Class 2 Stud Bolts at Lowest Export Price

Get Latest Price List

Grade Comparison

Difference Between ASTM A193 B8M vs ASTM A193 B8 Bolts

B8

Standard Grade (UNS S30400)

Mo Content0%
Chloride Resist.Low
Corrosion Resist.
General boltingIndoor pipingStructural fastening
VS
B8M

Marine Grade (UNS S31600)

Mo Content2–3%
Chloride Resist.High
Corrosion Resist.
Marine hardwareChemical plantsOffshore platforms

B8M is preferred over B8 wherever chloride exposure or salt water contact is expected

Exporter of SA 193 Gr B8M Threaded Rod in Various Torque Specs With UNC, BSF and UN8 Thread

Buyer’s Guide

Which Thread Type Do You Need in SA 193 B8M Threaded Rod?

UNC Coarse

Fast assembly, higher tolerance to dirt and minor thread damage on site.

UNF Fine

Higher tensile strength per bolt, used where vibration resistance matters.

UNJ Radiused Root

Higher fatigue life for critical or repeated-load joints.

UNR Rolled Thread

Cold-rolled root radius, better fatigue strength than cut threads.

ASTM A193 B8M Bolt Torque Chart

Check ASTM A193 B8M Bolts Stockists, Gives Excellent Torque Chart for Bolts

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

 

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

 

Types of B8M Grade Stainless Steel Fasteners

View ASTM A193 B8M Bolts Supplier in India, Get A193 B8M Fasteners in UNC, UNF, Metric Threads at Low Cost

ASTM A193 B8M U Bolts

ASTM A193 B8M U Bolts

  • Pipe Support Clamping
  • Bent Rod Construction
  • Marine Grade Corrosion Resist.
SA 193 Grade B8M Square Bolts

SA 193 Grade B8M Square Bolts

  • Square Under-Head Fit
  • Anti-Rotation Locking
  • Structural Timber & Steel
ASTM A193 Gr B8M Hex Bolts

ASTM A193 Gr B8M Hex Bolts

  • Standard Six-Sided Head
  • ASME B18.2.1 Dimensions
  • General Fastening Use
A193 Gr B8M Eye Bolts

A193 Gr B8M Eye Bolts

  • Looped Head For Lifting
  • Rigging & Anchoring Use
  • M10 to M48 Range
ASTM A193 B8M Class 2 Lag Bolts

ASTM A193 B8M Class 2 Lag Bolts

  • Coarse Self-Tapping Thread
  • High Strain-Hardened Strength
  • Structural Timber Fixing
SA 193 Grade B8M Carriage Bolts

SA 193 Grade B8M Carriage Bolts

  • Round Smooth Head
  • Square Neck Anti-Turn
  • Structural Steel Assembly
ASTM A193 Gr B8M Hex Head Bolts

ASTM A193 Gr B8M Hex Head Bolts

  • Wrench-Driven Installation
  • Class 1 & Class 2 Options
  • Structural & Piping Joints
ASME SA 193 Gr B8M Anchor Bolts

ASME SA 193 Gr B8M Anchor Bolts

  • Foundation Embedment
  • L-Bend & J-Bend Styles
  • Base Plate Fixing
ASTM A193 B8M Allen Cap Bolt

ASTM A193 B8M Allen Cap Bolt

  • Hex Socket Drive Head
  • Low Profile Fit
  • Machinery & Instrumentation

Request For Quote

Get a Quote From ASTM A193 B8M Heavy Hex Bolts Stockist in India

Bulk Enquiry Support for A193 B8M Class 1 and Class 2 Bolting

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Dealer and Distributor of B8M Grade Stainless Steel Bolt Heat Treatment and A193 B8M Class 1 Studs Weight Chart

ASTM A193 B8M Bolts Standards
ASTM A193Alloy Steel Bolting
ASME SA 193Pressure Vessel Bolting
ASME B18.5Round Head Bolts
ASME B18.2.2Heavy Hex Nuts & Bolts
DIN 933 / 931Hex Bolts, Full & Half Thread
DIN 934Hex Nuts
DIN 970Stud Bolts
ISO 4014 / 4016Hex Head Bolts

A193 Grade B8M Heavy Hex Bolt Dimension

View ASTM A193 B8M Bolts Stockists, Gives Accurate Dimension Chart For Customer Requirements

Heavy Hex Bolt Dimension

Diameter (D) 3 05/8 2 1/4 03/4 1 1 3/4 1 1/8 1 3/8 1 1/4 1 1/2 2 07/8 2 1/2 01/2 2 3/4
Across the Flats (F) MIN 4.475 1.031 3.388 1.212 1.575 2.662 1.756 2.119 1.938 2.3 3.025 1.394 3.75 0.85 4.112
MAX 4.625 1.062 3.5 1.25 1.625 2.75 1.812 2.188 2 2.375 3.125 1.438 3.875 0.875 4.25
Body Diameter (D) MIN 2.961 0.605 2.214 0.729 0.976 1.716 1.098 1.345 1.223 1.47 1.964 0.852 2.461 0.482 2.711
MAX 3.081 0.642 2.305 0.768 1.022 1.785 1.149 1.404 1.277 1.531 2.039 0.895 2.559 0.515 2.827
Across the Corners © MIN 5.102 1.175 3.862 1.383 1.796 3.035 2.002 2.416 2.209 2.622 3.449 1.589 4.275 0.969 4.688
MAX 5.34 1.227 4.041 1.443 1.876 3.175 2.093 2.526 2.309 2.742 3.608 1.66 4.474 1.01 4.907
Thread Lengths (T) > 6” 6 1.75 5 2 2.5 4 2.75 3.25 3 3.5 4.5 2.25 5.5 1.5 6
< 6” 6.25 1.5 4.75 1.75 2.25 3.75 2.5 3 2.75 3.25 4.25 2 5.25 1.25 5.75
Head Height (H) MIN 1.815 0.378 1.327 0.455 0.591 1.054 0.658 0.81 0.749 0.902 1.175 0.531 1.479 0.302 1.632
MAX 2.06 0.444 1.548 0.524 0.7 1.196 0.78 0.94 0.876 1.036 1.388 0.604 1.708 0.364 1.869

 

Applications

ASTM A193 B8M Class 2 Hex Bolt Applications

Chemical Industries
Construction & Infrastructure
Petrochemical Industries
Water Treatment Facilities
Marine & Offshore
Power Plants
Refineries

What Else Do You Need With ASTM A193 B8M Bolts?
ASTM A193 B8M Stud Bolt

ASTM A193 B8M Stud Bolt

  • UNS S31600, Class 1 & 2
  • M10 to M110
  • Double end, full thread
ASTM A194 Grade 8M Hex Nut

ASTM A194 Grade 8M Hex Nut

  • Recommended pair for B8M bolts
  • M6 to M110
  • Heavy hex & standard hex
SS 316 Plain Washer

SS 316 Plain Washer

  • Recommended washer grade
  • M6 to M110
  • Load distribution under nut

A193 B8M Class 2 Stud Bolts Weight Chart

Find ASTM A193 B8M Bolts Stockists, Gives Accurate Weight Chart for Stud Bolts

A193 B8M Class 2 Stud Bolts Diameter (inches) Weight per Inch (lbs) Weight per Foot (lbs)
1/2″ 0.16 1.92
5/8″ 0.26 3.12
9/16″ 0.21 2.52
1/4″ 0.04 0.48
1-1/8″ 0.86 10.32
2″ 2.80 33.60
1-3/4″ 2.14 25.68
3/8″ 0.09 1.08
5/16″ 0.06 0.72
1-1/2″ 1.56 18.72
7/16″ 0.12 1.44
1-1/4″ 1.06 12.72
1″ 0.66 7.92
3/4″ 0.38 4.56
7/8″ 0.52 6.24

Heat Treatment of A193 B8M Class 1 vs Class 2 Studs
Heat Treatment

A193 B8M Class 1

Carbide Solution Treated
  • Solution annealed only, no cold work
  • Lower yield, higher ductility
  • General purpose bolting duty

30 / 75 ksi Yield / Tensile

A193 B8M Class 2

Solution Treated+ Strain Hardened
  • Cold worked after solution treatment
  • Higher yield, diameter-dependent strength
  • Preferred for high-pressure flange joints

Up to 95 / 110 ksi (≤M20)

Request For Quote

Get a Direct Quote From the ASTM A193 B8M Bolts Manufacturer in India

Get B8M Stud Bolts in various thread types at factory price, fast delivery in Europe and Saudi

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Check A193 Gr 8M Socket Head Cap Screw Chemical Composition, Equivalent Grades and Mechanical Properties

Advantages of Using ASTM A193 B8M class 2 Screws

CE Approved ASTM A193 B8M Bolts Manufacturer in India Provides Best Bolts With Provides Outstanding Advantage

High Temperature Strength

Rated for continuous hot service

Max Service Temp
800°C
Oxidation Resistance
High

Chloride & Pitting Resistance

Molybdenum-alloyed bolting grade

Molybdenum Content
2–3%
Pitting Resistance
High


Cryogenic Service Rated

Stable toughness in sub-zero duty

Min Service Temp
-198°C
Impact Toughness
Excellent

Non-Magnetic Property

Austenitic microstructure

Magnetic Permeability
Low
Crystal Structure
Austenitic

Weld-Friendly, Low Sensitization

Resists carbide precipitation

Carbon Content
0.08% max
Post-Weld Treatment
Not Required


High Strength-to-Weight Ratio

Strain hardened Class 2 option

Class 2 Yield (≤M20)
95 ksi
Class 2 Tensile (≤M20)
110 ksi

ASME SA193 Gr B8M Heavy Hex Bolts Chemical Composition
Chemical Composition
B8M
UNS S31600
Mn2.00 max
C0.08 max
Si1.00 max
P0.045 max
Cr18.0 – 20.0
S0.030 max
Ni8.0 – 11.0
Mo2.00 – 3.00

Check ASTM A193 B8M Bolts Supplier in India, Molybdenum-Bearing Grade for Marine and Chemical Projects

ASTM A193 Gr B8M Fasteners Delivery Time Table

Greece

4 weeks

UK

4 weeks

Poland

4 weeks

Ukraine

4 weeks

Spain

4 weeks

USA

45-60 days

Canada

60-70 days

Mexico

30-40 days

Panama

40 days

Costa Rica

50 days

Denmark

40-50 days

ASTM A193 B8M Bolts Equivalent Grades
Grade Equivalents
ASTM A193 B8M5 standards
🇺🇸 UNSS31600
🇩🇪 EN / WNR1.4401
🇬🇧 BSBS 970
🇩🇪 DINX 5 CrNiMo 17 13 2
🇺🇸 ASMESA 193 Gr B8M

Equivalent Grade Chart for Global Buyers Sourcing ASTM A193 B8M Bolts

SA 193 Gr B8M Threaded Rod Manufacturing & Testing Process
Forming
B8M Bolt Forming Method
  • Cold Forging
  • CNC Machined
  • Hot Forging
Testing
SA 193 B8M Quality Testing
  • Tensile Testing
  • Hardness Testing
  • Chemical Analysis
Inspection
A193 B8M Third Party Inspection
  • 100% Tested with MTC EN 10204 3.1/3.2

ASTM A193 B8M Stud Bolt Mechanical Properties

Vision Alloys is an ASTM A193 B8M Bolts Manufacturer in India, mechanical values vary by diameter per ASTM A193

Mechanical Properties
B8M Class 1All Diameters
Yield 30 ksi
Tensile 75 ksi
Elong. 30% in 2″HRB 96HB 223
B8M Class 2≤ M20
Yield 95 ksi
Tensile 110 ksi
Elong. 15% in 2″HRC 35HB 321
B8M Class 2M20 – M24
Yield 80 ksi
Tensile 100 ksi
Elong. 20% in 2″HRC 35HB 321
B8M Class 2M24 – M30
Yield 65 ksi
Tensile 95 ksi
Elong. 25% in 2″HRC 35HB 321
B8M Class 2M30 – M36
Yield 50 ksi
Tensile 90 ksi
Elong. 30% in 2″HRC 35HB 321

PED Approved ASTM A193 B8M Bolts Supplier in India, Offering High Strength Bolting for Pressure Retaining Joints

Project Reference

ASTM A193 B8M Bolts Client Reference

🇦🇪

United Arab Emirates

Offshore Platform Expansion

A193 B8M Class 2Heavy HexUNS S31600
🇸🇦

Saudi Arabia

Petrochemical Refinery Upgrade

A193 B8M Class 1Flange BoltFull Thread
🇩🇪

Germany

Structural Steel Framework

A193 B8M Stud BoltDIN 931Anchor Bolt
🇸🇬

Singapore

Marine Shipyard Fabrication

A193 B8M BoltsCorrosion ResistantU Bolt
🇦🇺

Australia

Desalination Plant Project

A193 B8M Class 2High Chloride Resist.Full Thread
🇧🇷

Brazil

Power Plant Piping Upgrade

A193 B8M Heavy HexASME B18.2.2Class 2

Request For Quote

Send Your Enquiry for ASTM A193 B8M Structural Stud Bolts

Custom Sizes and Coatings Available on Bulk B8M Bolt Orders

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Which ASTM A193 B8M U Bolts Should You Order For Your Load?

Class 1

All Diameters, Solution Annealed

Yield Strength30 ksi
Tensile Strength75 ksi

Class 2 (M20–M30)

Strain Hardened, Mid Diameter

Yield Strength80 ksi
Tensile Strength100 ksi

Class 2 (≤M20)

Strain Hardened, Highest Strength

Yield Strength95 ksi
Tensile Strength110 ksi

Recommended Nut and Washer for ASTM A193 B8M Bolts
Bolting Grade ASTM A193 Grade B8M, B8M2, B8M3
Recommended Washer Grade SS 316
Recommended Nut Grade ASTM A194 Grade 8M / 8MA

Global Reach

Global Supply Locations of ASTM A193 B8M Bolts

25+
Countries & Cities Served Worldwide

North & South America

🇺🇸 USA
🇨🇦 Canada
🇲🇽 Mexico
🇧🇷 Brazil

Europe

🇬🇧 UK
🇪🇸 Spain
🇵🇱 Poland
🇳🇱 Netherlands
🇩🇪 Germany
🇮🇹 Italy
🇮🇪 Ireland
🇩🇰 Denmark

Middle East

🇦🇪 UAE
🇸🇦 Saudi Arabia
🇶🇦 Qatar
🇹🇷 Turkey
📍 Doha
📍 Dammam
📍 Riyadh
📍 Abu Dhabi
📍 Al Jubail
📍 Al Khobar

Africa

🇿🇦 South Africa
🇳🇬 Nigeria

Asia Pacific

🇸🇬 Singapore
🇦🇺 Australia

FAQs

ASTM A193 B8M Bolts

What sizes are available in B8M bolts?

M3 to M150, custom up to 6″.

Difference between ASTM A193 B8 and B8M?

B8M has 2-3% Mo; B8 has none.

Difference between B8M Class 1 and Class 2?

Class 1 is annealed; Class 2 is strain hardened.

Do you provide a mill test certificate?

Yes, EN 10204/3.1B with every batch.

What is the UNS number for B8M bolts?

UNS S31600.

What is the working temperature range?

-198°C to 800°C.

Which nut grade suits B8M bolts?

ASTM A194 Grade 8M / 8MA.

What is the max yield strength of B8M Class 2?

95 ksi for diameters ≤ M20.

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