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ASTM A325 Threaded Rods Manufacturer & Exporter in India

Explore ASTM A325 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 A325 Threaded Rods?

ASTM A325 threaded rods are high-strength, medium carbon steel fasteners designed for structural bolting applications. Manufactured from quenched and tempered steel, these rods conform to the ASTM A325 specification, ensuring minimum mechanical properties suitable for critical load-bearing connections in steel structures. They are commonly supplied with coarse (UNC) threads and are available in plain, hot-dip galvanized, or mechanically galvanized finishes for enhanced corrosion resistance.

ASTM A325 threaded rods are widely specified for use in steel building frames, bridge construction, and heavy equipment anchoring, where high tensile and yield strength are essential. Their compatibility with A325 heavy hex nuts and structural washers ensures reliable, code-compliant assemblies for demanding environments.

Quick Specifications

MaterialMedium Carbon Steel, Quenched & Tempered
ASTM GradeA325
UNS NumberK10430
Material StandardASTM A325
Thread StandardASME B1.1 (UNC/UNF)
Diameter Range1/2"-1-1/2" (M12-M36)
FinishPlain, Hot-Dip Galvanized, Mechanically Galvanized
Tensile Strength830 MPa (120 ksi) min
Yield Strength660 MPa (95 ksi) min
Hardness24-34 HRC
? All rods supplied with full mechanical and chemical test reports. Third-party inspection available.

Complete the Fastener Set

Other ASTM A325 Fastener Products Available from RealBolt

RealBolt also manufactures the complete ASTM A325 fastener range from certified alloy / carbon steel bar stock, including ASTM A325 Bolts, ASTM A325 Nuts, ASTM A325 Screws, ASTM A325 Washers, and ASTM A325 Studs. All ASTM A325 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
ASTM A325 Bolts
ASTM A325 Nuts
ASTM A325 Screws
ASTM A325 Washers
ASTM A325 Studs

Technical Data

ASTM A325 Threaded Rods Dimensions, Sizes & Thread Standards

ASTM A325 Threaded Rods are available in metric M6–M100 and inch ¼″–4″ as standard. ASTM A325 threaded rods are supplied per ASME B18.31.3 and ASTM F568M. Custom lengths available in 25mm or 1″ increments. Inch and metric sizes available. All ASTM A325 threaded rods dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Threaded Rod Dimensions - Inch (ASTM A325)

Nominal Size (in)Thread Pitch (TPI)Core Diameter (in)Standard Lengths (in)
1/2130.40512, 24, 36, 72
5/8110.50912, 24, 36, 72
3/4100.61412, 24, 36, 72
7/890.72912, 24, 36, 72
180.83512, 24, 36, 72
1-1/870.94112, 24, 36, 72
1-1/471.05412, 24, 36, 72
1-3/861.16112, 24, 36, 72
1-1/261.26812, 24, 36, 72

Dimensional & Material Standards

StandardCoversThread
ASTM A325High-strength structural bolts & rodsUNC
ASME B18.31.3Threaded rodsUNC/UNF
ASTM F568MMetric threaded rodsMetric
ASME B1.1Unified Inch Screw ThreadsUNC/UNF
ISO 898-1Mechanical properties (metric)Metric
Material StandardRequirement
ASTM A325Quenched & tempered steel
ASTM F3125Unified high-strength bolts
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

ASTM A325 Threaded Rod Chemical Composition

ASTM A325 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 A325

ElementComposition (%)
Carbon (C)0.25-0.58
Manganese (Mn)0.60-1.35
Phosphorus (P)0.048 max
Sulfur (S)0.058 max
Silicon (Si)0.15-0.35
Copper (Cu)0.35 max
Nickel (Ni)0.25 max
Chromium (Cr)0.25 max
Molybdenum (Mo)0.06 max
? All heats verified by spectrographic analysis. Full traceability provided.

Why ASTM A325 Alloy Composition Matters for Threaded Rods

Medium Carbon Content
The controlled carbon range (0.25–0.58%) ensures high tensile and yield strength after quenching and tempering, critical for structural load transfer in steel frameworks.
Manganese for Toughness
Manganese (0.60–1.35%) improves hardenability and toughness, reducing the risk of brittle fracture in dynamic or seismic applications.
Low Phosphorus & Sulfur
Strict limits on phosphorus and sulfur prevent embrittlement and ensure ductility, making A325 threaded rods reliable for cyclic loading and fatigue resistance.

Fastener Performance

ASTM A325 Threaded Rods Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for ASTM A325 Threaded Rods per ASTM. ASTM A325 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 Torque (Nm)Lubricated Torque (Nm)Clamp Load (kN)
1/2"1209538
5/8"23018561
3/4"41033090
7/8"660530125
1"1000800170
1-1/4"18001440270
1-1/2"27002160380
?? Anti-galling: Use zinc-based or molybdenum anti-seize for galvanized rods. Lubricated values assume K=0.16. Always verify torque with calibrated tools.

Industry Applications

ASTM A325 Threaded Rods Applications — Industries & End Uses

ASTM A325 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 A325 threaded rods are the standard for structural steel connections in commercial buildings, warehouses, and industrial facilities. Used for column anchoring, beam-to-column joints, and bracing systems where high strength and code compliance are required.
Threaded rods to ASTM A325 are specified for bridge deck anchoring, expansion joint assemblies, and highway sign structures. Their high tensile strength and ductility ensure safety and longevity in dynamic load environments.
A325 threaded rods are used for anchoring heavy machinery, turbines, and compressors to concrete foundations in power plants, refineries, and manufacturing plants, providing secure, vibration-resistant connections.
These rods are used in the assembly and anchoring of wind turbine towers, transmission line pylons, and communication masts, where structural integrity and resistance to fatigue are critical.

ASTM A325 Threaded Rods Standards & International Certifications

ASTM A325 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 9001:2015CE MarkingEN 10204 3.1/3.2PED 2014/68/EUThird-Party Inspection

Buy ASTM A325 Threaded Rods from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified ASTM A325 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 A325 Threaded Rods — Frequently Asked Questions

Browse expert answers to common questions about ASTM A325 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 A325 threaded rods selection and pricing.
ASTM A325 threaded rods are supplied with Unified National Coarse (UNC) threads per ASME B1.1 as standard. Fine thread (UNF) and metric thread (per ISO 261/965 or DIN 13) options are available on request. Custom thread pitches and left-hand threads can be manufactured for special applications with a typical lead time of 2-3 weeks.
For plain finish rods, use a molybdenum-based anti-seize. For hot-dip galvanized rods, use a zinc-based anti-seize to prevent galling and ensure consistent torque. Avoid copper-based lubricants to prevent galvanic corrosion with zinc coatings. Always apply lubricant to both threads and nut bearing surfaces for optimal performance.
Yes, ASTM A325 threaded rods are available with hot-dip galvanized or mechanically galvanized coatings for enhanced corrosion resistance in outdoor, marine, or industrial environments. For highly corrosive or coastal applications, consider pairing with A563 DH nuts and F436 washers for a complete corrosion-resistant assembly.
Standard sizes (1/2″-1-1/4″) are available ex-stock with no formal MOQ-single rods can be supplied for urgent needs. Custom diameters, lengths, or coatings may require a minimum order of 10 rods or 20 kg. Quantity discounts are available at 50, 200, 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
  • 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