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ASTM A307 Grade B Studs Manufacturer & Exporter in India

Explore ASTM A307 Grade B 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 B Studs?

ASTM A307 Grade B studs are carbon steel threaded rods or double-end studs manufactured to the ASTM A307 specification, specifically designed for use in flange bolting and pressure piping applications. These studs are produced from low-carbon steel and are supplied with either plain, zinc-plated, or hot-dip galvanized finishes, depending on service requirements.

Grade B designates higher mechanical properties than Grade A, with a minimum tensile strength of 60 ksi (414 MPa), making them suitable for medium-strength bolted joints in piping, valves, and pressure vessels. ASTM A307 Grade B studs are widely used in refineries, chemical plants, and general industrial construction where moderate strength and reliable performance are required.

Quick Specifications

MaterialCarbon Steel
ASTM GradeA307 Grade B
UNS NumberK02200
DIN Number1.1151
Material StandardASTM A307
Stud Standard (Metric)DIN 976 / ISO 898-1
Stud Standard (Inch)ASME B16.5 / B18.31.2
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M100 / ¼"-4"
Tensile Strength414 MPa (60 ksi) min
Yield Strength207 MPa (30 ksi) min
HardnessMax 100 HB
? All material supplied with EN 10204 3.1 certification. Third-party inspection available on request.

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 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 B Bolts
ASTM A307 Grade B Nuts
ASTM A307 Grade B Screws
ASTM A307 Grade B Washers
ASTM A307 Grade B Threaded Rods

Technical Data

ASTM A307 Grade B Studs Dimensions, Sizes & Thread Standards

ASTM A307 Grade B Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 976 (metric) / ASME B16.5 (inch). Custom cut lengths available in 5mm or ½” increments. Inch and metric threads supplied as required. All ASTM A307 Grade B studs dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Stud Dimensions - Metric (DIN 976)

Size (M)Pitch (mm)Thread Length (mm)Min L (mm)Max L (mm)
M61.01820200
M81.252225250
M101.52630300
M121.753035400
M162.03840500
M202.54450600
M243.05460800
M303.566701000
M364.078801200
M424.5901001500
M485.01021202000
M565.51141402000
M646.01261602500
M726.01381802500
M806.01502003000
M1006.01802503000

Dimensional & Material Standards

StandardCoversThread
DIN 976Threaded rods & studsMetric
ASME B16.5Stud bolts for flangesUNC
ASME B18.31.2Continuous threaded rodsUNC/UNF
ISO 898-1Mechanical propertiesMetric
ISO 965-1Thread tolerancesMetric
Material StandardRequirement
ASTM A307Carbon steel studs
ASTM F1554 Gr.36Alternative for anchor rods
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

ASTM A307 Grade B Chemical Composition

ASTM A307 Grade B 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)0.27% max
Manganese (Mn)0.60-0.90%
Phosphorus (P)0.04% max
Sulfur (S)0.15% max
Silicon (Si)0.15-0.30%
Copper (Cu)0.20% max
Iron (Fe)Balance
? All heats verified by spectrographic analysis. Material traceability maintained from mill to finished stud.

Why ASTM A307 Grade B Alloy Composition Matters for Studs

Low Carbon Content — Weldability & Ductility
The low carbon content (=0.27%) ensures good weldability and ductility, making ASTM A307 Grade B studs suitable for field welding and easy installation in piping and structural applications.
Manganese & Silicon — Strength & Toughness
Manganese and silicon additions improve the strength and toughness of the studs, providing reliable performance in moderate temperature and pressure environments.
Phosphorus & Sulfur Control — Prevents Brittleness
Strict limits on phosphorus and sulfur prevent embrittlement, ensuring the studs maintain integrity under vibration and cyclic loading.

Fastener Performance

ASTM A307 Grade B Studs Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for ASTM A307 Grade B Studs per ASTM. ASTM A307 Grade B 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)
M12604822
M1615012040
M2030024063
M2452041691
M301050840145
M3618001440210
M4227002160290
M4839003120390
?? Anti-seize: Use molybdenum-based or graphite-based anti-seize for carbon steel studs. Lubricated values assume K=0.16. Avoid copper-based anti-seize in corrosive environments.

Industry Applications

ASTM A307 Grade B Studs Applications — Industries & End Uses

ASTM A307 Grade B 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 B studs are the standard for flange bolting in refinery and petrochemical piping systems, including ASME B16.5 and B16.47 flanges, valves, and pressure vessels operating at moderate temperatures and pressures.
Used for bolting pipe flanges, pumps, and mechanical joints in water treatment and distribution systems, where reliable carbon steel fasteners are required for non-corrosive or mildly corrosive environments.
Studs for ductwork, fire sprinkler flanges, and mechanical equipment mounting in commercial and industrial buildings, offering cost-effective fastening for non-critical service.
Employed in steel-to-steel connections, base plates, and anchor assemblies in building construction, bridges, and infrastructure projects where moderate strength is sufficient.

ASTM A307 Grade B Studs Standards & International Certifications

ASTM A307 Grade B 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/EUCE MarkingThird Party Inspection

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

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

Browse expert answers to common questions about ASTM A307 Grade B 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 B studs selection and pricing.
ASTM A307 Grade B studs are manufactured to ASTM A307 for material and mechanical properties, DIN 976 for metric threaded rods, ASME B16.5 for flange bolting, and ASME B18.31.2 for inch continuous threaded rods. ISO 898-1 covers mechanical properties for metric sizes. All studs are supplied with full certification and traceability.
Grade A covers general-purpose bolts and threaded rods for non-critical applications, while Grade B is specifically for flange bolting with higher mechanical property requirements (minimum 60 ksi tensile strength). Grade B studs are used in pressure piping, valves, and vessels, whereas Grade A is for general construction.
Yes, ASTM A307 Grade B studs can be supplied with hot-dip galvanized, zinc-plated, or plain finishes. Hot-dip galvanizing provides enhanced corrosion resistance for outdoor or wet environments. Threads are typically tapped oversize to accommodate the coating thickness as per ASTM A563 and ASME B1.1.
There is no formal MOQ for standard sizes (M12-M36 or ½”-1½”) held in stock – we supply from single pieces for urgent requirements. Custom sizes or coatings may require a minimum batch of 10 kg. Bulk price breaks 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