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ASTM A193 Grade B8M Threaded Rods Manufacturer & Exporter in India

Explore ASTM A193 Grade B8M Threaded Rods Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
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-196

Min Temp

870

Max Temp

🌡

870

Suitable for continuous service up to approximately 870°C under typical operating conditions.

⚡

620

Typical tensile strength around 620 MPa depending on product form and heat treatment.

🛡

Very Good

Very Good corrosion resistance in a wide range of industrial environments.

⚖

8

Typical density is approximately 8.0 g/cm³.

Product Overview

What are ASTM A193 Grade B8M Threaded Rods?

ASTM A193 Grade B8M threaded rods are high-performance fasteners manufactured from austenitic stainless steel, specifically Type 316 (UNS S31600), designed for use in high-temperature, high-pressure, and corrosive environments. These rods are solution-annealed and strain-hardened to achieve superior mechanical properties and are widely specified for critical bolted joints in chemical processing, oil & gas, and marine applications.

Grade B8M threaded rods offer enhanced resistance to pitting, crevice, and chloride-induced corrosion compared to standard 304/316 stainless, making them the preferred choice for offshore, petrochemical, and food-grade installations. All rods are produced in accordance with ASTM A193 and supplied with full traceability and test certification.

Quick Specifications

MaterialStainless Steel 316 (AISI 316)
UNS NumberS31600
DIN Number1.4401
Material StandardASTM A193
Rod Standard (Metric)DIN 975 / DIN 976
Rod Standard (Inch)ASME B18.31.3
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M64 / ¼"-2½"
Tensile Strength515 MPa (75 ksi) min
Yield Strength205 MPa (30 ksi) min
HardnessMax 223 HB / 95 HRB
? All rods supplied with EN 10204 3.1 certification. PMI and IGC test available on request.

Complete the Fastener Set

Other ASTM A193 Grade B8M Fastener Products Available from RealBolt

RealBolt also manufactures the complete ASTM A193 Grade B8M fastener range — ASTM A193 Grade B8M Bolts, ASTM A193 Grade B8M Nuts, ASTM A193 Grade B8M Screws, ASTM A193 Grade B8M Washers, ASTM A193 Grade B8M Studs — from certified bar stock per ASTM with full EN 10204 MTC 3.1/3.2 documentation and fast Mumbai dispatch.
ASTM A193 Grade B8M Bolts
ASTM A193 Grade B8M Nuts
ASTM A193 Grade B8M Screws
ASTM A193 Grade B8M Washers
ASTM A193 Grade B8M Studs

Technical Data

ASTM A193 Grade B8M Threaded Rods Dimensions, Sizes & Thread Standards

ASTM A193 Grade B8M Threaded Rods are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 975 (full thread) / DIN 976 (studs) / ASME B18.31.3. Custom lengths available up to 3 meters. Inch and metric sizes supplied as standard.

Threaded Rod Dimensions - Metric (DIN 975)

Size (M)Pitch (mm)Rod Length (mm)Thread Length (mm)
M61.01000 / 2000 / 3000Full
M81.251000 / 2000 / 3000Full
M101.51000 / 2000 / 3000Full
M121.751000 / 2000 / 3000Full
M162.01000 / 2000 / 3000Full
M202.51000 / 2000 / 3000Full
M243.01000 / 2000 / 3000Full
M303.51000 / 2000 / 3000Full
M364.01000 / 2000 / 3000Full
M424.51000 / 2000 / 3000Full
M485.01000 / 2000 / 3000Full
M565.51000 / 2000 / 3000Full
M646.01000 / 2000 / 3000Full

Dimensional & Material Standards

StandardCoversThread
DIN 975Threaded rods, full threadMetric
DIN 976Stud bolts, double endMetric
ASME B18.31.3Threaded rodsUNC/UNF
ASME B16.5Stud bolts for flangesUNC
Material StandardRequirement
ASTM A193Grade B8M, solution-annealed
ASTM A320Low temperature service
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

ASTM A193 Grade B8M Chemical Composition

ASTM A193 Grade B8M Threaded Rods are manufactured from chromium-molybdenum alloy steel with Cr (0.8–1.1%), Mo (0.15–0.65%), and vanadium additions in B16 grades, controlled per ASTM and ASME SA-193. Cr-Mo additions raise hardenability and creep rupture strength for pressure vessel service; vanadium in B16 extends the allowable service temperature to 538°C.

Chemical Composition per ASTM A193 Grade B8M

ElementComposition (%)
Chromium (Cr)16.0-18.0
Nickel (Ni)10.0-14.0
Molybdenum (Mo)2.00-3.00
Carbon (C)0.08 max
Manganese (Mn)2.00 max
Silicon (Si)1.00 max
Phosphorus (P)0.045 max
Sulfur (S)0.030 max
Nitrogen (N)0.10 max
Iron (Fe)Balance
? All heats spectro-tested and certified. IGC and PMI reports available on request.

Why ASTM A193 Grade B8M Alloy Composition Matters for Threaded Rods

Molybdenum (2–3%) — Superior Pitting Resistance
The addition of molybdenum in Grade B8M (316) stainless steel significantly improves resistance to pitting and crevice corrosion, especially in chloride-rich and marine environments, making these rods ideal for offshore and chemical plant use.
Nickel (10–14%) — Enhanced Ductility & Toughness
Nickel content ensures excellent ductility and toughness, even at sub-zero temperatures, and provides stability against stress corrosion cracking in aggressive process conditions.
Low Carbon — Weldability & Intergranular Corrosion Resistance
Low carbon content (=0.08%) prevents carbide precipitation during welding, ensuring the rods maintain corrosion resistance in the heat-affected zone and are suitable for fabrication and field assembly.

Fastener Performance

ASTM A193 Grade B8M Threaded Rods Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for ASTM A193 Grade B8M Threaded Rods per ASTM. ASTM A193 Grade B8M threaded rods achieve 620 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Rod SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M12705625
M1617013650
M2034027280
M24590472120
M301200960190
M3621001680275
M4232002560370
M4847003760480
?? Anti-galling: Use molybdenum-based or PTFE anti-seize. Lubricated values assume K=0.16. Avoid over-torquing to prevent thread galling in stainless steel.

Industry Applications

ASTM A193 Grade B8M Threaded Rods Applications — Industries & End Uses

ASTM A193 Grade B8M Threaded Rods from RealBolt are specified across oil and gas pressure vessels, power generation, and petrochemical where very good corrosion resistance and 620 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
ASTM A193 Grade B8M threaded rods are specified for bolted joints in offshore platforms, refinery piping, and pressure vessels where resistance to chloride stress corrosion and high temperatures is critical. Used for flange connections, pipe supports, and structural assemblies in sour and saline environments.
These rods are used for reactor closures, heat exchanger tie rods, and process equipment in chemical plants handling acids, chlorides, and aggressive media. Grade B8M’s molybdenum content ensures long-term reliability in corrosive process streams.
Ideal for use in desalination plants, water treatment facilities, and municipal infrastructure where exposure to chlorinated water and brine demands superior pitting and crevice corrosion resistance.
ASTM A193 Grade B8M threaded rods are chosen for dock hardware, pier construction, and marine fastenings exposed to salt spray and tidal immersion, providing long service life without rusting or seizing.

ASTM A193 Grade B8M Threaded Rods Standards & International Certifications

ASTM A193 Grade B8M Threaded Rods from RealBolt Engineering Industries are manufactured to internationally recognised fastener dimensional standards covering thread form, tolerances, strength grades, and quality requirements. Every batch ships with EN 10204 MTC 3.1/3.2, hardness test certificate, dimensional inspection report, and proof load test records — available on request for all orders.
Standards
DIN 975 DIN 976-1 ASME B18.31.2 IS 1367 IS 1364 SAE J429
Certifications
ISO 9001:2015PED 2014/68/EUNABL LabEN 10204 3.1 / 3.2

Buy ASTM A193 Grade B8M Threaded Rods from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified ASTM A193 Grade B8M Threaded Rods — for competitive pricing, EN 10204 MTC 3.1/3.2 documentation, and fast Mumbai dispatch. Standard sizes are ex-stock; custom dimensions accepted with 2–3 week lead time. Request your quote today.
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Answers for Buyers

ASTM A193 Grade B8M Threaded Rods — Frequently Asked Questions

Browse expert answers to common questions about ASTM A193 Grade B8M Threaded Rods from RealBolt — covering ASTM A193 grade, proof load, creep ratings, cryogenic L7 limits, coating options, and EN 10204 documentation. Contact our technical team directly for project-specific guidance on ASTM A193 Grade B8M threaded rods selection and pricing.
ASTM A193 Grade B8M threaded rods are supplied to DIN 975 (full thread), DIN 976 (studs), ASME B18.31.3 (inch and metric), and ASME B16.5 (flange studs). Custom thread forms such as BSW, BSF, and Whitworth are available on request with short lead times.
Always use a suitable anti-seize lubricant such as molybdenum disulfide or PTFE-based compound on threads and nut faces. Avoid over-torquing and use slow, steady wrenching. Stainless steel is prone to galling, especially in larger diameters or high preload applications.
Yes – Grade B8M (316 stainless) offers excellent resistance to pitting, crevice, and chloride-induced corrosion, making it ideal for marine, coastal, and desalination plant applications. No additional coating is required for most environments.
No MOQ for standard sizes (M8-M36) in stock – single rods can be supplied for urgent needs. Custom diameters or cut lengths may require a 10 kg minimum. Price breaks are available at 25, 100, and 500 pieces.

Industrial Cities We Serve:

  • Ahmedabad
  • Aurangabad
  • Bengaluru
  • Chennai
  • Coimbatore
  • Faridabad
  • Gandhidham
  • Greater Noida
  • Gurugram
  • Hazira
  • Hosur
  • Hyderabad
  • Jamnagar
  • Jamshedpur
  • Ludhiana
  • Mumbai
  • Mundra
  • Mysuru
  • Nagpur
  • Nashik
  • Navi Mumbai
  • Noida
  • Pune
  • Rajkot
  • Sanand
  • Surat
  • Thane
  • Tiruppur
  • Vadodara
  • Visakhapatnam

Countries We Export To:

  • US
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  • Germany
  • UK
  • France
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  • Spain
  • Netherlands
  • Belgium
  • Poland
  • Sweden
  • Norway
  • Denmark
  • Turkey
  • UAE
  • Saudi Arabia
  • Qatar
  • Oman
  • Kuwait
  • Bahrain
  • South Africa
  • Egypt
  • Nigeria
  • Australia
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  • Singapore
  • Malaysia
  • Indonesia
  • Thailand
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  • South Korea
  • Japan
  • Brazil