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ASTM A307 Grade B Threaded Rods Manufacturer & Exporter in India

Explore ASTM A307 Grade B 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 A307 Grade B Threaded Rods?

ASTM A307 Grade B threaded rods are carbon steel fasteners manufactured to meet the requirements of ASTM A307 for mechanical properties and dimensional tolerances. These rods are designed for use in cast iron flanged joints in piping systems, as well as in general construction and structural applications where moderate strength is required. Grade B rods are produced from low-carbon steel and are supplied with coarse threads, making them suitable for bolting flanged joints and other assemblies where high tensile strength is not critical.

ASTM A307 Grade B threaded rods are widely specified for waterworks, fire protection, and low-pressure piping systems, and are recognized for their reliability, ease of installation, and cost-effectiveness. They are available in a range of diameters and lengths, with full or partial threading, and can be supplied plain, hot-dip galvanized, or zinc-plated for enhanced corrosion resistance.

Quick Specifications

MaterialCarbon Steel
ASTM GradeA307 Grade B
UNS NumberK02200
DIN Number1.1151
Material StandardASTM A307
Threaded Rod StandardASME B18.31.3 / DIN 976
Thread FormUNC / Metric Coarse
Diameter RangeM6-M64 / ¼"-2½"
Tensile Strength414 MPa (60 ksi) min
Yield StrengthNot specified
HardnessMax 85 HRB
? All rods supplied with full traceability and test certification. Hot-dip galvanized and zinc-plated options available.

Complete the Fastener Set

Other ASTM A307 Grade B Fastener Products Available from RealBolt

RealBolt also manufactures the complete ASTM A307 Grade B fastener range — ASTM A307 Grade B Bolts, ASTM A307 Grade B Nuts, ASTM A307 Grade B Screws, ASTM A307 Grade B Washers, ASTM A307 Grade B Studs — from certified bar stock per ASTM with full EN 10204 MTC 3.1/3.2 documentation and fast Mumbai dispatch.
ASTM A307 Grade B Bolts
ASTM A307 Grade B Nuts
ASTM A307 Grade B Screws
ASTM A307 Grade B Washers
ASTM A307 Grade B Studs

Technical Data

ASTM A307 Grade B Threaded Rods Dimensions, Sizes & Thread Standards

ASTM A307 Grade B Threaded Rods are available in metric M6–M100 and inch ¼″–4″ as standard. Per ASME B18.31.3 (inch series) and DIN 976 (metric series). Custom lengths available in 50mm increments. Hot-dip galvanized and zinc-plated finishes supplied to order.

Threaded Rod Dimensions - Metric (DIN 976)

Size (M)Pitch (mm)Rod Diameter (mm)Standard Lengths (mm)
M61.06.01000, 2000
M81.258.01000, 2000
M101.510.01000, 2000, 3000
M121.7512.01000, 2000, 3000
M162.016.01000, 2000, 3000
M202.520.01000, 2000, 3000
M243.024.01000, 2000, 3000
M303.530.01000, 2000, 3000
M364.036.01000, 2000, 3000
M424.542.01000, 2000, 3000
M485.048.01000, 2000, 3000
M565.556.01000, 2000, 3000
M646.064.01000, 2000, 3000

Dimensional & Material Standards

StandardCoversThread
ASME B18.31.3Threaded rods (inch)UNC
DIN 976Threaded rods (metric)Metric
ISO 898-1Mechanical propertiesMetric
ASTM A307Carbon steel rodsUNC/Metric
Material StandardRequirement
ASTM A307Grade B, carbon steel
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC
ASTM F2329Hot-dip galvanizing
ASTM B633Zinc plating

Material Chemistry

ASTM A307 Grade B Chemical Composition

ASTM A307 Grade B 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 A307

ElementComposition (%)
Carbon (C)0.27% max
Manganese (Mn)0.60-0.90%
Phosphorus (P)0.04% max
Sulfur (S)0.15% max
Iron (Fe)Balance
? All heats verified by spectrometry. Material test certificates supplied with every batch.

Why ASTM A307 Grade B Alloy Composition Matters for Threaded Rods

Low Carbon Content — Weldability & Ductility
The low carbon content (=0.27%) ensures good weldability and ductility, making ASTM A307 Grade B threaded rods suitable for on-site fabrication and easy installation in piping and structural assemblies.
Manganese — Strength & Toughness
Manganese (0.60–0.90%) improves the strength and toughness of the rods, providing reliable performance in moderate load applications such as flange bolting and general construction.
Phosphorus & Sulfur — Controlled for Machinability
Phosphorus and sulfur are controlled to enhance machinability without compromising the mechanical integrity of the threaded rods, ensuring consistent threading and ease of use.

Fastener Performance

ASTM A307 Grade B Threaded Rods Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for ASTM A307 Grade B Threaded Rods per ASTM. ASTM A307 Grade B 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)
M12655223
M1616012841
M2032025665
M2455044094
M301100880151
M3619001520219
M4229502360299
M4843503480398
?? Anti-galling: Use molybdenum-based or graphite anti-seize for carbon steel. Lubricated values assume K=0.16. For galvanized rods, reduce torque by 10%.

Industry Applications

ASTM A307 Grade B Threaded Rods Applications — Industries & End Uses

ASTM A307 Grade B 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 A307 Grade B threaded rods are the standard for bolting cast iron flanged joints in water supply, wastewater, and fire protection piping systems. Their moderate strength and reliable performance make them ideal for valve, hydrant, and flange connections in municipal and industrial waterworks.
Used for anchoring, bracing, and joining structural steel members in commercial and industrial buildings. Grade B rods are specified for non-critical load-bearing applications, including curtain wall anchors, equipment supports, and general construction assemblies.
Threaded rods are widely used for suspending HVAC ductwork, pipe hangers, and mechanical equipment. Their compatibility with standard nuts and washers ensures easy installation and adjustment in building services.
ASTM A307 Grade B rods are suitable for bolting low-pressure process piping flanges, tank nozzles, and vessel manways in chemical, food processing, and utility plants where high strength is not required.

ASTM A307 Grade B Threaded Rods Standards & International Certifications

ASTM A307 Grade B 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 9001:2015EN 10204 3.1PED 2014/68/EUNABL LabMTC 3.1 / 3.2

Buy ASTM A307 Grade B Threaded Rods from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified ASTM A307 Grade B 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 A307 Grade B Threaded Rods — Frequently Asked Questions

Browse expert answers to common questions about ASTM A307 Grade B 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 A307 Grade B threaded rods selection and pricing.
ASTM A307 Grade B threaded rods are available to ASME B18.31.3 (inch series), DIN 976 (metric series), and ISO 898-1 for mechanical properties. They can be supplied with UNC or metric coarse threads. Hot-dip galvanized and zinc-plated finishes are available per ASTM F2329 and ASTM B633. Custom cut lengths and threading options are available on request.
Yes, ASTM A307 Grade B threaded rods can be used outdoors when supplied with hot-dip galvanized or zinc-plated coatings for corrosion protection. For highly corrosive environments, hot-dip galvanizing per ASTM F2329 is recommended. Always specify the required coating for your application.
Yes, the low carbon content of ASTM A307 Grade B rods allows for good weldability. However, welding should be performed by qualified personnel, and post-weld cleaning or coating may be required to maintain corrosion resistance, especially for galvanized rods.
Standard sizes (M10-M36, 1m-3m lengths) are available ex-stock with no formal MOQ-single pieces can be supplied for urgent needs. Custom diameters or cut lengths may require a minimum order of 10 rods or 20 kg. Quantity discounts apply at 50, 200, and 500 rods.

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