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ASTM A490 Bolts Manufacturer & Exporter in India

Explore ASTM A490 Bolts 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 A490 Bolts?

ASTM A490 bolts are high-strength, quenched and tempered alloy steel structural bolts designed for critical steel-to-steel connections in bridges, buildings, and heavy construction. Manufactured to ASTM A490/A490M, these bolts offer a minimum tensile strength of 150 ksi (1040 MPa) and are available in both heavy hex and tension control (TC) head styles. ASTM A490 bolts are used where higher strength is required than ASTM A325, and are supplied with a plain, zinc, or mechanical galvanized finish as specified.

These bolts are not permitted for use in atmospheres that are corrosive to high-strength steel, such as marine or chemical environments, unless protected by approved coatings. ASTM A490 bolts are commonly specified for slip-critical and bearing-type connections in steel structures, and are installed using calibrated torque or tensioning methods to ensure joint integrity.

Quick Specifications

MaterialAlloy Steel (Quenched & Tempered)
UNS NumberK10486 (typical)
DIN Number1.7225 (42CrMo4)
Material StandardASTM A490 / A490M
Bolt Standard (Metric)ISO 898-1 Class 10.9
Bolt Standard (Inch)ASME B18.2.6
Thread FormUNC / Metric Coarse
Diameter Range½"-1½" (M12-M36)
Tensile Strength150 ksi (1040 MPa) min
Yield Strength130 ksi (895 MPa) min
HardnessRockwell C 33-39
? All bolts supplied with full mechanical and chemical certification. Third-party inspection available.

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 Nuts, ASTM A490 Screws, ASTM A490 Washers, ASTM A490 Studs, 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 Nuts
ASTM A490 Screws
ASTM A490 Washers
ASTM A490 Studs
ASTM A490 Threaded Rods

Technical Data

ASTM A490 Bolts Dimensions, Sizes & Thread Standards

ASTM A490 Bolts are available in metric M6–M100 and inch ¼″–4″ as standard. Per ASME B18.2.6 (inch series heavy hex), ISO 898-1 (metric), and ASTM A490/A490M. Custom lengths available in 5mm or ¼” increments. All ASTM A490 bolts dimensions are verified against applicable DIN, ISO, and ASME B18 standards before

Heavy Hex Bolt Dimensions - Inch (ASME B18.2.6)

Nominal Size (in)Thread Pitch (TPI)Head Width (in)Head Height (in)Min Length (in)Max Length (in)
½130.8750.34416
?111.0620.4381¼8
¾101.2500.5311½10
?91.4380.6251¾10
181.6250.719212
1¼72.0000.9062½12
1½62.3751.094314

Heavy Hex Bolt Dimensions - Metric (ISO 898-1)

Size (M)Pitch (mm)Head Width (mm)Head Height (mm)Min Length (mm)Max Length (mm)
M121.75228.030200
M162.02710.035250
M202.53213.040300
M243.04115.050400
M303.55018.760500
M364.06022.570600

Dimensional & Material Standards

StandardCoversThread
ASME B18.2.6Heavy hex structural boltsUNC
ISO 898-1Metric property class 10.9Metric
ASTM A490High-strength boltsUNC/Metric
ASTM F3125Structural bolt consolidationUNC/Metric
ASME B18.2.1Hex bolts & screwsUNC
Material StandardRequirement
ASTM A490Alloy steel, quenched & tempered
ASTM F436Hardened washers
ASTM A563Heavy hex nuts
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

ASTM A490 Chemical Composition

ASTM A490 Bolts 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)0.26-0.55
Manganese (Mn)0.70-1.35
Phosphorus (P)0.035 max
Sulfur (S)0.040 max
Silicon (Si)0.15-0.35
Chromium (Cr)0.45 max
Nickel (Ni)0.25 max
Molybdenum (Mo)0.20 max
Boron (B)0.003 max
? All heats verified by spectrographic analysis. Full traceability provided with every batch.

Why ASTM A490 Alloy Composition Matters for Bolts

High Carbon Content — Strength & Hardness
The elevated carbon content in ASTM A490 bolts enables quenching and tempering to achieve the required 150 ksi tensile strength, ensuring reliable performance in high-load structural connections.
Manganese & Silicon — Toughness & Ductility
Manganese and silicon improve toughness and ductility, reducing the risk of brittle fracture under dynamic or impact loads common in steel structures.
Low Alloying — Weldability & Consistency
ASTM A490 bolts are not intended for welding, but the controlled alloy content ensures consistent mechanical properties and reliable installation in critical applications.

Fastener Performance

ASTM A490 Bolts Mechanical Properties & Torque Reference

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

Bolt SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
½"17013656
?"34027290
¾"610488146
?"970776204
1"14601168261
1¼"26002080418
1½"38003040608
?? Anti-galling: Use molybdenum-based anti-seize for alloy steel. Lubricated values assume K=0.16. Always follow RCSC or AISC installation guidelines for structural bolts.

Industry Applications

ASTM A490 Bolts Applications — Industries & End Uses

ASTM A490 Bolts 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 bolts are the standard for critical connections in steel bridge construction, including girder splices, truss joints, and bearing assemblies. Their high strength and reliability make them essential for highway, railway, and pedestrian bridges subject to dynamic loads and fatigue.
Heavy hex bolts to ASTM A490 are used in moment connections, column splices, and bracing systems in tall buildings, providing the strength needed for wind, seismic, and gravity loads in structural steel frames.
A490 bolts secure heavy machinery bases, crane rails, and structural supports in power plants, refineries, and manufacturing facilities, where high clamp load and vibration resistance are critical.
Slip-critical and bearing-type connections in stadium roof trusses, cantilevered seating structures, and long-span assemblies rely on ASTM A490 bolts for safety and long-term performance.

ASTM A490 Bolts Standards & International Certifications

ASTM A490 Bolts 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 931 DIN 933 DIN 960 DIN 961 DIN 6914 ISO 4014 ISO 4017 ISO 8676 ISO 8765 ASME B18.2.1 EN 14399 EN 15048 EN ISO 4014 EN ISO 4017 BS EN ISO 4014 BS 3692 BS 4190 IS 1363 IS 1364 IS 3757 SAE J429 UNI 5737 UNI 5739 CSN 021101 PN 82101
Certifications
ISO 9001:2015CE MarkingEN 10204 3.1EN 10204 3.2PED 2014/68/EU

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

Partner with RealBolt — India’s leading manufacturer of certified ASTM A490 Bolts — 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 A490 Bolts — Frequently Asked Questions

Browse expert answers to common questions about ASTM A490 Bolts 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 bolts selection and pricing.
ASTM A490 bolts are supplied as heavy hex head bolts per ASME B18.2.6 (inch series) and ISO 898-1 (metric). Tension control (TC) bolts are also available for automated installation. All bolts are fully threaded or partially threaded as specified, and can be supplied with matching ASTM A563 heavy hex nuts and ASTM F436 washers.
ASTM A490 bolts are not permitted to be hot-dip galvanized due to risk of hydrogen embrittlement. Mechanical galvanizing per ASTM B695 is allowed, as well as zinc-aluminum coatings or proprietary systems approved by the engineer. Always specify coating requirements at order placement.
No, ASTM A490 bolts are not weldable and should not be used in atmospheres that are corrosive to high-strength steel, such as marine or chemical plants, unless protected by approved coatings. For corrosive environments, consider ASTM A325 Type 3 (weathering steel) or stainless steel alternatives.
Standard sizes (½”-1½”) are available ex-stock with no formal MOQ – single pieces can be supplied for urgent needs. Custom sizes or special coatings may require a minimum order of 25 kg or as per project requirements. Quantity discounts apply at 100, 500, and 1000 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