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ASTM A307 Grade A Studs Manufacturer & Exporter in India

Explore ASTM A307 Grade A Studs 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 A Studs?

ASTM A307 Grade A studs are low carbon steel threaded rods or double-end studs manufactured to ASTM A307 specifications. These fasteners are designed for general-purpose, non-critical bolting applications where moderate strength and cost-effectiveness are required. Grade A studs are commonly supplied with a plain, zinc-plated, or hot-dip galvanized finish for enhanced corrosion resistance in atmospheric environments.

These studs are widely used for flange bolting, structural steel connections, and equipment anchoring in construction, waterworks, and light industrial applications. ASTM A307 Grade A studs are not intended for high-pressure or high-temperature service but offer reliable performance for standard bolted joints in buildings, pipelines, and machinery.

Quick Specifications

MaterialLow Carbon Steel
ASTM GradeA307 Grade A
UNS NumberK02201
DIN Number1.1151
Material StandardASTM A307
Stud Standard (Metric)DIN 976 / ISO 898-1
Stud Standard (Inch)ASME B18.31.2
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M64 / ¼"-2½"
Tensile Strength414 MPa (60 ksi) min
Yield Strength207 MPa (30 ksi) min
HardnessMax 85 HRB
? All material certified by NABL-accredited laboratory. Test reports available on request.

Complete the Fastener Set

Other ASTM A307 Grade A Fastener Products Available from RealBolt

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

Technical Data

ASTM A307 Grade A Studs Dimensions, Sizes & Thread Standards

ASTM A307 Grade A Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 976 (metric) / ASME B18.31.2 (inch). Custom lengths available in 10mm increments. Inch dimensions per ASME B18.31.2. All ASTM A307 Grade A studs dimensions are verified against applicable DIN, ISO, and ASME B18

Stud Dimensions - Metric (DIN 976)

Size (M)Pitch (mm)Thread Length (mm)Min L (mm)Max L (mm)
M61.01840300
M81.252250400
M101.52660500
M121.753070600
M162.03880800
M202.5441001000
M243.0541201200
M303.5661501500
M364.0782002000
M424.5902502500
M485.01023003000
M565.51143503500
M646.01264004000

Dimensional & Material Standards

StandardCoversThread
DIN 976Threaded rods & studsMetric
ASME B18.31.2Continuous thread studsUNC/UNF
ISO 898-1Mechanical propertiesMetric
ASTM A307Low carbon steel studsUNC/UNF
Material StandardRequirement
ASTM A307Low carbon steel, Grade A
EN 10204 3.1Mill test certificate
ISO 898-1Mechanical properties
ISO 4042Coating requirements

Material Chemistry

ASTM A307 Grade A Studs Chemical Composition

ASTM A307 Grade A 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 A307

ElementComposition (%)
Carbon (C)0.26% max
Manganese (Mn)0.60% max
Phosphorus (P)0.04% max
Sulfur (S)0.15% max
Iron (Fe)Balance
? All heats verified by NABL-accredited spectrometry. Chemical test reports available on request.

Why ASTM A307 Grade A Alloy Composition Matters for Studs

Low Carbon Content — Weldability & Ductility
The low carbon content (=0.26%) ensures ASTM A307 Grade A studs are easily weldable and maintain good ductility, making them suitable for structural and general-purpose bolting where some deformation is acceptable.
Manganese — Strength & Toughness
Manganese up to 0.60% improves the steel’s strength and toughness, providing reliable performance for moderate load applications without embrittlement.
Phosphorus & Sulfur — Controlled for Quality
Phosphorus and sulfur are tightly controlled to prevent brittleness and ensure consistent mechanical properties, supporting safe use in construction and piping systems.

Fastener Performance

ASTM A307 Grade A Studs Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for ASTM A307 Grade A Studs per ASTM. ASTM A307 Grade A 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 (Nm)Lubricated (Nm)Clamp Load (kN)
M12554418
M1613510832
M2026521250
M2446036872
M30900720117
M3615501240170
M4223501880235
M4834002720320
?? Anti-galling: Use general-purpose anti-seize for carbon steel. Lubricated values assume K=0.16. Avoid over-tightening to prevent thread stripping.

Industry Applications

ASTM A307 Grade A Studs Applications — Industries & End Uses

ASTM A307 Grade A 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 A307 Grade A studs are widely used for structural steel connections, column base plates, and beam anchoring in commercial and industrial buildings. Their moderate strength and weldability make them ideal for non-critical load-bearing joints.
These studs are specified for bolting ductile iron and cast iron pipe flanges, valves, and fittings in water treatment plants, municipal pipelines, and fire protection systems where high strength is not required.
Grade A studs are used for anchoring pumps, compressors, HVAC equipment, and machinery to concrete foundations, providing reliable hold-down in general industrial and utility installations.
Used in the assembly of tanks, enclosures, and light-duty frames, ASTM A307 Grade A studs offer cost-effective fastening for fabricated steel structures and process equipment.

ASTM A307 Grade A Studs Standards & International Certifications

ASTM A307 Grade A 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 3.1NABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy ASTM A307 Grade A Studs from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified ASTM A307 Grade A 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.
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Answers for Buyers

ASTM A307 Grade A Studs — Frequently Asked Questions

Browse expert answers to common questions about ASTM A307 Grade A 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 A307 Grade A studs selection and pricing.
ASTM A307 Grade A studs are available to DIN 976 (metric threaded rods), ASME B18.31.2 (inch continuous thread studs), and ISO 898-1 for mechanical properties. Custom thread forms (UNC, UNF, BSW, metric fine) and special lengths are available on request with typical lead times of 7-10 working days.
Yes, ASTM A307 Grade A studs can be supplied with hot-dip galvanized, zinc-plated, or plain finishes. Hot-dip galvanizing is recommended for outdoor and waterworks applications to improve corrosion resistance. Threads are typically oversize to accommodate coating thickness.
No, ASTM A307 Grade A studs are not intended for high-pressure or high-temperature service. For pressure piping, use ASTM A193 B7 or equivalent high-strength studs. Grade A is suitable for atmospheric and low-pressure bolting only.
There is no formal MOQ for standard sizes (M10-M36) held in stock – we supply from single pieces for urgent requirements. Custom sizes or finishes may require a minimum order of 25 kg. Quantity discounts apply at 100 pcs, 500 pcs, and 1000 pcs.

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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  • Mexico
  • Germany
  • UK
  • France
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  • Netherlands
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  • Sweden
  • Norway
  • Denmark
  • Turkey
  • UAE
  • Saudi Arabia
  • Qatar
  • Oman
  • Kuwait
  • Bahrain
  • South Africa
  • Egypt
  • Nigeria
  • Australia
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  • Singapore
  • Malaysia
  • Indonesia
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