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ASTM A193 Grade B7 Threaded Rods Manufacturer & Exporter in India

Explore ASTM A193 Grade B7 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 A193 Grade B7 Threaded Rods?

ASTM A193 Grade B7 threaded rods are high-strength alloy steel fasteners manufactured from quenched and tempered chromium-molybdenum steel, typically conforming to AISI 4140/4142. These rods are designed for bolting pressure vessels, valves, flanges, and fittings for high-temperature and high-pressure service. B7 threaded rods are widely specified in petrochemical, power generation, and process industries due to their excellent mechanical properties and resistance to hydrogen embrittlement.

With a minimum tensile strength of 860 MPa (125 ksi) and hardness limited to 35 HRC, ASTM A193 B7 threaded rods are suitable for use up to 450°C (840°F). They are supplied with full-length threads or custom thread lengths, and are available in both metric and inch sizes, meeting the requirements of ASME, DIN, and ISO standards for critical bolted connections.

Quick Specifications

MaterialAlloy Steel (AISI 4140/4142)
UNS NumberK11597
DIN Number1.7225
Material StandardASTM A193 Grade B7
Rod Standard (Metric)DIN 976-1 / ISO 898-1
Rod Standard (Inch)ASME B18.31.3
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M100 / ¼"-4"
Tensile Strength860 MPa (125 ksi) min
Yield Strength720 MPa (105 ksi) min
HardnessMax 35 HRC / 321 HB
? All rods supplied with EN 10204 3.1 certification. Third-party inspection available on request.

Complete the Fastener Set

Other ASTM A193 Grade B7 Fastener Products Available from RealBolt

RealBolt also manufactures the complete ASTM A193 Grade B7 fastener range — ASTM A193 Grade B7 Bolts, ASTM A193 Grade B7 Nuts, ASTM A193 Grade B7 Screws, ASTM A193 Grade B7 Washers, ASTM A193 Grade B7 Studs — from certified bar stock per ASTM with full EN 10204 MTC 3.1/3.2 documentation and fast Mumbai dispatch.
ASTM A193 Grade B7 Bolts
ASTM A193 Grade B7 Nuts
ASTM A193 Grade B7 Screws
ASTM A193 Grade B7 Washers
ASTM A193 Grade B7 Studs

Technical Data

ASTM A193 Grade B7 Threaded Rods Dimensions, Sizes & Thread Standards

ASTM A193 Grade B7 Threaded Rods are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 976-1 (metric) / ASME B18.31.3 (inch). Custom thread lengths and cut-to-length service available. Metric and inch diameters from M6 to M100 and ¼” to 4″.

Threaded Rod Dimensions - Metric (DIN 976-1)

Size (M)Pitch (mm)Thread Length (mm)Min L (mm)Max L (mm)
M61.0Full1002000
M81.25Full1002000
M101.5Full1003000
M121.75Full1003000
M162.0Full1003000
M202.5Full1003000
M243.0Full1003000
M303.5Full1003000
M364.0Full1003000
M424.5Full1003000
M485.0Full1003000
M565.5Full1003000
M646.0Full1003000
M726.0Full1003000
M806.0Full1003000
M1006.0Full1003000

Dimensional & Material Standards

StandardCoversThread
DIN 976-1Threaded rods, full threadMetric
ASME B18.31.3Threaded rods, inchUNC/UNF
ISO 898-1Mechanical propertiesMetric
ASTM A193Material & mechanicalUNC/UNF
ASME B16.5Stud bolts for flangesUNC
Material StandardRequirement
ASTM A193 B7Alloy steel, quenched & tempered
ASTM A320 L7Low temp equivalent
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

ASTM A193 Grade B7 Chemical Composition

ASTM A193 Grade B7 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 A193 B7

ElementComposition (%)
Carbon (C)0.37-0.49%
Manganese (Mn)0.65-1.10%
Phosphorus (P)0.035% max
Sulfur (S)0.040% max
Silicon (Si)0.15-0.35%
Chromium (Cr)0.75-1.20%
Molybdenum (Mo)0.15-0.25%
Nickel (Ni)0.25% max
Copper (Cu)0.25% max
? All heats spectro-tested and certified to ASTM A193 B7. Full traceability provided.

Why ASTM A193 Grade B7 Alloy Composition Matters for Threaded Rods

Cr-Mo Alloy — High Strength & Toughness
Chromium and molybdenum additions provide ASTM A193 Grade B7 threaded rods with superior tensile strength and toughness, making them ideal for high-pressure, high-temperature bolted joints in refineries and power plants.
Controlled Carbon — Quench & Temper Response
The carbon content is optimized for hardenability and strength after quenching and tempering, ensuring consistent mechanical properties throughout the rod length.
Low P & S — Prevents Embrittlement
Strict limits on phosphorus and sulfur minimize the risk of embrittlement and ensure reliable performance in cyclic loading and pressure applications.

Fastener Performance

ASTM A193 Grade B7 Threaded Rods Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for ASTM A193 Grade B7 Threaded Rods per ASTM. ASTM A193 Grade B7 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 (Nm)Lubricated (Nm)Clamp Load (kN)
M12957638
M1623518878
M20460368122
M24800640176
M3016501320285
M3628502280415
M4245003600570
M4867005360760
?? Anti-galling: Use molybdenum-based anti-seize for assembly. Lubricated values assume K=0.15. Avoid over-torquing to prevent thread damage.

Industry Applications

ASTM A193 Grade B7 Threaded Rods Applications — Industries & End Uses

ASTM A193 Grade B7 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 A193 Grade B7 threaded rods are the industry standard for bolting pressure vessels, heat exchangers, and ASME B16.5/B16.47 flanges in oil refineries, gas processing plants, and upstream production facilities. Their high strength and temperature resistance ensure reliable sealing in critical joints.
Used for turbine casing bolting, boiler drum tie rods, and HRSG ductwork connections, B7 threaded rods withstand high thermal cycling and pressure loads in fossil and combined cycle power plants.
Threaded rods for reactor closures, column internals, and process piping supports where high mechanical strength and resistance to hydrogen embrittlement are required. Suitable for ammonia, urea, and fertilizer plants.
B7 rods are specified for high-load anchorages, pipe supports, and structural connections in water treatment plants, desalination facilities, and civil infrastructure projects.

ASTM A193 Grade B7 Threaded Rods Standards & International Certifications

ASTM A193 Grade B7 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 9001:2015EN 10204 3.1PED 2014/68/EUNABL LabMTC 3.1 / 3.2

Buy ASTM A193 Grade B7 Threaded Rods from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified ASTM A193 Grade B7 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 A193 Grade B7 Threaded Rods — Frequently Asked Questions

Browse expert answers to common questions about ASTM A193 Grade B7 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 A193 Grade B7 threaded rods selection and pricing.
ASTM A193 Grade B7 threaded rods are available with ISO metric threads (DIN 976-1), UNC/UNF threads (ASME B18.31.3), and custom thread forms such as BSW or BSF on request. Both right-hand and left-hand threads can be supplied. Full-length and double-end threaded rods are available for flange and structural applications.
Use a high-quality molybdenum-based or nickel-based anti-seize compound (such as Molykote 1000 or Jet-Lube 550) on threads and nut faces to prevent galling and facilitate disassembly. Avoid copper-based anti-seize in high-temperature or corrosive environments. Lubricated torque values should be reduced by 20% compared to dry assembly.
Yes, ASTM A193 Grade B7 threaded rods are rated for continuous service up to 450°C (840°F). For higher temperatures or low-temperature service, consider ASTM A193 B16 or ASTM A320 L7 grades. Always verify application requirements and consult with engineering for critical bolted joints.
Standard sizes (M12-M36, ½”-1½”) are available ex-stock with no formal MOQ – single rods can be supplied for urgent needs. Custom diameters or cut-to-length rods may require a minimum order of 10 kg or 10 pieces. Bulk discounts apply 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