+912267437972

+919022636025

enquiry@real-bolt.com

Contact Us

ASTM A490 Studs Manufacturer & Exporter in India

Explore ASTM A490 Studs Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
Request a Quote
View Products

-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 A490 Studs?

ASTM A490 studs are high-strength, quenched and tempered alloy steel fasteners designed for structural bolting applications requiring superior tensile and yield strength. Manufactured from alloy steel conforming to ASTM A490, these studs are intended for use in steel-to-steel structural connections, such as bridges, buildings, and heavy construction. ASTM A490 studs are characterized by their minimum tensile strength of 150 ksi (1040 MPa) and are available in both plain and mechanically galvanized finishes. They are not recommended for use in environments where they may be exposed to moisture or corrosive atmospheres unless properly protected.

These studs are commonly supplied as fully threaded rods or double-end studs, and are paired with ASTM A563 or A194 heavy hex nuts. ASTM A490 studs are strictly prohibited from being hot-dip galvanized, due to the risk of hydrogen embrittlement, and are instead offered with mechanical zinc coatings for corrosion resistance.

Quick Specifications

MaterialAlloy Steel (ASTM A490)
UNS NumberK10486
DIN Number1.7225 (approx.)
Material StandardASTM A490
Stud Standard (Metric)ISO 898-1 Class 10.9 (reference)
Stud Standard (Inch)ASME B18.31.2
Thread FormUNC / UNF / Metric
Diameter Range½"-1½" (M12-M36)
Tensile Strength150 ksi (1040 MPa) min
Yield Strength130 ksi (895 MPa) min
HardnessRockwell C 33-39
? All material tested and certified per ASTM A490. Mechanical zinc coating available for corrosion resistance.

Complete the Fastener Set

Other ASTM A490 Fastener Products Available from RealBolt

RealBolt also manufactures the complete ASTM A490 fastener range from certified alloy / carbon steel bar stock, including ASTM A490 Bolts, ASTM A490 Nuts, ASTM A490 Screws, ASTM A490 Washers, and ASTM A490 Threaded Rods. All ASTM A490 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
ASTM A490 Bolts
ASTM A490 Nuts
ASTM A490 Screws
ASTM A490 Washers
ASTM A490 Threaded Rods

Technical Data

ASTM A490 Studs Dimensions, Sizes & Thread Standards

ASTM A490 Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per ASME B18.31.2 (inch series) and ISO 898-1 (metric reference). Custom lengths available in 5mm or ¼” increments. Supplied with UNC or metric threads as specified. All ASTM A490 studs dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Stud Dimensions - Inch Series (ASME B18.31.2)

Nominal Size (in)Thread Pitch (UNC)Body Diameter (in)Length Range (in)
½130.5002-12
?110.6252-18
¾100.7502-24
?90.8752-36
181.0002-48
1¼71.2502-60
1½61.5002-72

Dimensional & Material Standards

StandardCoversThread
ASTM A490High-strength structural studsUNC/Metric
ASME B18.31.2Continuous thread & double-end studsUNC
ISO 898-1Metric property class 10.9 (reference)Metric
ASTM F436Hardened washers-
ASTM A563Heavy hex nutsUNC
ASTM A194Heavy hex nuts (alternative)UNC
Material StandardRequirement
ASTM A490Alloy steel, quenched & tempered
ASTM F3125Unified structural bolt standard
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

ASTM A490 Stud Chemical Composition

ASTM A490 Studs 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 A490

ElementComposition (%)
Carbon (C)0.35-0.53
Manganese (Mn)0.65-1.35
Phosphorus (P)0.035 max
Sulfur (S)0.040 max
Silicon (Si)0.15-0.35
Chromium (Cr)0.45-0.65
Molybdenum (Mo)0.20-0.25
Boron (B)0.0005-0.003
? All heats verified by spectrometry and certified per ASTM A490. Full traceability provided.

Why ASTM A490 Alloy Composition Matters for Studs

High Carbon & Alloy Content — Strength
The elevated carbon, chromium, and molybdenum content in ASTM A490 studs delivers the high tensile and yield strength required for critical structural connections, ensuring reliable load transfer in steel frameworks.
Boron Addition — Hardenability
Boron is added in small amounts to improve hardenability, allowing uniform properties throughout the stud even in large diameters, which is essential for consistent performance in heavy construction.
Strict Phosphorus & Sulfur Limits
Low phosphorus and sulfur levels minimize the risk of embrittlement and improve the toughness and ductility of the studs, reducing the chance of brittle fracture under dynamic loads.

Fastener Performance

ASTM A490 Studs Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for ASTM A490 Studs per ASTM. ASTM A490 studs achieve 620 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Stud SizeDry Torque (Nm)Lubricated Torque (Nm)Clamp Load (kN)
½"19015060
?"38030095
¾"670540150
?"1050850210
1"15501250275
1¼"27002150430
1½"40003200620
?? Lubrication: Use only approved lubricants for structural bolting. Lubricated values assume K=0.16. Do not use anti-seize on A490 studs.

Industry Applications

ASTM A490 Studs Applications — Industries & End Uses

ASTM A490 Studs 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 A490 studs are the standard for bolted connections in steel bridge construction, including girder splices, truss joints, and critical load-bearing assemblies. Their high strength ensures safety and reliability in dynamic and static load conditions.
Used in moment frame connections, column splices, and transfer girders in tall buildings, ASTM A490 studs provide the strength needed for seismic and wind load resistance in modern structural steel frameworks.
A490 studs are specified for anchoring heavy machinery, pressure vessels, and structural supports in power plants, refineries, and manufacturing facilities where high clamping force and fatigue resistance are essential.
Ideal for bolting together crane booms, transmission towers, and large infrastructure components, ASTM A490 studs deliver the mechanical performance required for safety-critical assemblies subject to vibration and shock.

ASTM A490 Studs Standards & International Certifications

ASTM A490 Studs 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 938 DIN 939 DIN 976-1 ASME B18.31.2 IS 1364 IS 1367 SAE J429
Certifications
ISO 9001:2015EN 10204 3.1PED 2014/68/EUNABL LabMTC 3.1 / 3.2

Buy ASTM A490 Studs from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified ASTM A490 Studs — 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.
022-6743-7972
+91 90226 36025
Email Us

Answers for Buyers

ASTM A490 Studs — Frequently Asked Questions

Browse expert answers to common questions about ASTM A490 Studs 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 A490 studs selection and pricing.
ASTM A490 studs are made from quenched and tempered alloy steel and have a minimum tensile strength of 150 ksi, while ASTM A325 studs are made from medium carbon steel with a minimum tensile strength of 120 ksi. A490 studs are used where higher strength is required, but they cannot be hot-dip galvanized due to hydrogen embrittlement risk, unlike A325.
No, ASTM A490 studs must not be hot-dip galvanized or zinc electroplated due to the risk of hydrogen embrittlement. Only mechanical zinc coatings (mechanical galvanizing) are permitted for corrosion resistance. Always specify the required coating at the time of order.
ASTM A490 studs are typically paired with ASTM A563 or A194 heavy hex nuts and ASTM F436 hardened washers. The nuts must be of equal or greater strength and properly lubricated for correct tensioning.
ASTM A490 studs are not recommended for use in corrosive or wet environments unless protected by an approved mechanical zinc coating. For severe corrosion, consider using stainless steel or weathering steel fasteners instead.

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