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Hastelloy G35 Threaded Rods Manufacturer & Exporter in India

Explore Hastelloy G35 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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-200

Min Temp

1100

Max Temp

🌡

1100

Suitable for continuous service up to approximately 1100°C under typical operating conditions.

⚡

800

Typical tensile strength around 800 MPa depending on product form and heat treatment.

🛡

Excellent

Excellent corrosion resistance in a wide range of industrial environments.

⚖

8.9

Typical density is approximately 8.9 g/cm³.

Product Overview

What are Hastelloy G35 Threaded Rods?

Hastelloy G35 threaded rods are nickel-chromium-molybdenum-copper alloy fasteners manufactured from UNS N06035 bar stock conforming to ASTM B574. The alloy’s high chromium content (33.2-36.2%) combined with molybdenum (7.6-9.0%) and copper (0.3% max) delivers exceptional resistance to oxidising acids, particularly nitric and mixed acid environments, with a minimum tensile strength of 690 MPa in the annealed condition.

Hastelloy G35 threaded rods are specified for phosphoric acid production, nitric acid processing, and aggressive chemical environments where standard nickel alloys and stainless steels fail prematurely. The alloy’s outstanding resistance to intergranular corrosion and stress corrosion cracking makes it the preferred choice for chemical process flanges, reactor closures, and heat exchanger assemblies worldwide.

Quick Specifications

MaterialHastelloy G35
UNS NumberN06035
DIN Number2.4643
Material StandardASTM B574
Threaded Rod Standard (Metric)DIN 975 / DIN 976 / ISO 888
Threaded Rod Standard (Inch)ASME B18.31.3
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M100 / ¼"-4"
Tensile Strength690 MPa (100 ksi) min
Yield Strength310 MPa (45 ksi) min
HardnessMax 35 HRC / 220 HB
? All material certified by NABL-accredited laboratory. PMI available on request.

Complete the Fastener Set

Other Hastelloy G35 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Hastelloy G35 fastener range from certified nickel-molybdenum-chromium superalloy bar stock, including Hastelloy G35 Bolts, Hastelloy G35 Nuts, Hastelloy G35 Screws, Hastelloy G35 Washers, and Hastelloy G35 Studs. All Hastelloy G35 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Hastelloy G35 Bolts
Hastelloy G35 Nuts
Hastelloy G35 Screws
Hastelloy G35 Washers
Hastelloy G35 Studs

Technical Data

Hastelloy G35 Threaded Rods Dimensions, Sizes & Thread Standards

Hastelloy G35 Threaded Rods are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 975 (full thread rod) / DIN 976 (stud bolt rod) / ISO 888. Custom lengths available. Inch dimensions per ASME B18.31.3. All Hastelloy G35 threaded rods dimensions are verified against applicable DIN, ISO, and

Threaded Rod Dimensions - Metric (DIN 975 / ISO 888)

Size (M)Pitch (mm)Core Dia (mm)Stress Area (mm²)Min L (mm)Max L (mm)
M61.04.7720.11001000
M81.256.4736.61001000
M101.58.1658.01002000
M121.759.8584.31002000
M162.013.551571002000
M202.516.932451003000
M243.020.323531003000
M303.525.715611003000
M364.031.098171004000
M424.536.4811201004000
M485.041.8714701004000
M565.549.2520302005000
M646.056.6426802005000
M726.064.6434602006000
M806.072.6443402006000
M1006.092.6469902006000

Dimensional & Material Standards

StandardCoversThread
DIN 975Threaded rod, full thread, 1m/2m lengthsMetric
DIN 976-1Stud bolts, metric threadMetric
ISO 888Bolts, screws, studs - nominal lengthsMetric
ASME B18.31.3Continuous threaded rodUNC/UNF
ASME B16.5Stud bolts for flangesUNC
MSS SP-75Stud bolts, high-pressure fittingsUNC
Material StandardRequirement
ASTM B574Bar/rod - UNS N06035
ASTM B619Welded pipe - reference alloy
NACE MR0175Sour service =35 HRC
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Hastelloy G35 Chemical Composition

Hastelloy G35 Threaded Rods derive their exceptional acid corrosion resistance from a precisely controlled nickel-molybdenum-chromium composition per ASTM. High molybdenum and tungsten content suppresses pitting and reducing-acid attack; ultra-low carbon (0.01% max) eliminates sensitization risk in welded assemblies. Full elemental composition is certified in the EN 10204 MTC supplied with every Hastelloy G35 threaded rods order from RealBolt.

Chemical Composition per ASTM B574

ElementComposition (%)
Nickel (Ni)Balance (min ~58%)
Chromium (Cr)33.2-36.2%
Molybdenum (Mo)7.6-9.0%
Iron (Fe)2.0% max
Copper (Cu)0.30% max
Carbon (C)0.05% max
Manganese (Mn)1.0% max
Silicon (Si)0.70% max
Cobalt (Co)1.0% max
Tungsten (W)0.50% max
Phosphorus (P)0.04% max
Sulfur (S)0.03% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Hastelloy G35 Alloy Composition Matters for Threaded Rods

Cr (33.2–36.2%) — Oxidising Acid Resistance
The exceptionally high chromium content gives Hastelloy G35 threaded rods outstanding resistance to nitric acid and mixed acid environments at elevated concentrations and temperatures — performance that no standard nickel alloy or stainless steel can replicate in these conditions.
Mo (7.6–9.0%) — Pitting & Crevice Corrosion Protection
Molybdenum reinforces resistance to localised corrosion, including pitting and crevice attack in chloride-bearing process streams. This is critical for threaded rod assemblies where crevice conditions exist at thread roots and under nut bearing faces.
Low Carbon (0.05% max) — Intergranular Corrosion Immunity
The controlled low carbon content prevents sensitisation and carbide precipitation at grain boundaries during welding or elevated-temperature service. Hastelloy G35 threaded rods maintain full corrosion resistance in the as-welded condition without post-weld heat treatment.

Fastener Performance

Hastelloy G35 Threaded Rods Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Hastelloy G35 Threaded Rods per ASTM. Hastelloy G35 threaded rods achieve 800 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Tightening Torque Reference - Hastelloy G35 Threaded Rods

Rod SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M12725828
M1617514068
M20350280108
M24610488157
M301220976249
M3621201696362
M4233802704499
M4850104008656
?? Anti-galling: Use nickel-based anti-seize (Molykote P-37 or equivalent). Lubricated values assume K=0.15. Never use copper-based anti-seize on nickel alloys - galvanic incompatibility accelerates thread corrosion.

Industry Applications

Hastelloy G35 Threaded Rods Applications — Industries & End Uses

Hastelloy G35 Threaded Rods from RealBolt are specified across chemical processing, pharmaceutical, oil and gas, and FGD where excellent corrosion resistance and 800 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Hastelloy G35 threaded rods are the primary fastener specification for nitric acid concentrators, evaporators, and reactor vessel closures. The alloy’s ultra-high chromium content provides corrosion rates below 0.1 mm/year in boiling concentrated nitric acid – a performance level unmatched by any standard stainless steel or conventional nickel alloy.
Threaded rod assemblies in wet-process phosphoric acid (WPA) plants, including filter press frames, heat exchanger channel covers, and agitator shaft connections, rely on Hastelloy G35 for resistance to the combined attack of phosphoric acid, fluoride ions, and sulfate species present in fertiliser-grade acid production.
Hastelloy G35 threaded rods are specified for absorber tower internals, spray header supports, and mist eliminator frames in FGD scrubbers where hot dilute sulfuric acid, chloride ions, and oxidising conditions combine to rapidly corrode standard duplex and 316L stainless steel fasteners.
Reactor closure stud bolt sets and agitator flange connections in pharmaceutical API manufacturing and fine chemical synthesis use Hastelloy G35 threaded rods where product purity requirements prohibit iron contamination and where mixed organic/inorganic acid environments demand superior corrosion resistance.

Hastelloy G35 Threaded Rods Standards & International Certifications

Hastelloy G35 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, PMI (XRF), NACE MR0175/ISO 15156, and NABL-accredited lab reports — available on request for all orders.
Standards
DIN 975 DIN 976-1 ASME B18.31.2 IS 1367 IS 1364
Certifications
ISO 9001:2015NACE MR0175NABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy Hastelloy G35 Threaded Rods from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Hastelloy G35 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

Hastelloy G35 Threaded Rods — Frequently Asked Questions

Browse expert answers to common questions about Hastelloy G35 Threaded Rods from RealBolt — covering acid corrosion resistance, NACE MR0175 compliance, ASTM standards, available sizes, and MTC documentation. Contact our technical team directly for project-specific guidance on Hastelloy G35 threaded rods selection and pricing.
Hastelloy G35 threaded rods are manufactured from bar stock conforming to ASTM B574 (UNS N06035). Dimensional standards for metric threaded rods are DIN 975 (full-thread rod in 1m and 2m lengths) and DIN 976-1 (stud bolt form). Inch-series rods are produced per ASME B18.31.3. Stud bolt sets for flanged connections are supplied per ASME B16.5 or MSS SP-75. All material is certified to EN 10204 3.1 as standard, with 3.2 TPI-witnessed certification available on request.
Hastelloy G35 outperforms C276 specifically in oxidising acid environments – particularly nitric acid, mixed nitric/sulfuric acid, and phosphoric acid. C276’s higher molybdenum content (15-17%) gives it superior performance in reducing acid and chloride environments, but in strongly oxidising conditions, the ultra-high chromium of G35 (33.2-36.2%) provides significantly lower corrosion rates. For mixed service involving both oxidising and reducing acids, consult our engineering team for a site-specific recommendation.
Hastelloy G35 threaded rods should be paired with matching UNS N06035 hex nuts manufactured to ASTM B574 / ASME B18.2.2 (inch) or ISO 4032 (metric). Using matched-alloy nuts prevents galvanic corrosion at the thread interface and ensures consistent corrosion resistance across the entire fastener assembly. For flange stud bolt applications, heavy hex nuts per ASME B18.2.2 are standard. All nuts are supplied from the same heat as the rod where possible, with a single EN 10204 3.1 MTC covering the complete set.
Use a nickel-based anti-seize compound such as Molykote P-37, Jet-Lube KOPR-KOTE Pure Nickel, or Bostik Never-Seez Pure Nickel on all Hastelloy G35 threaded rod assemblies. Apply to the full thread length and nut bearing faces before assembly. Reduce calculated dry torque values by approximately 20% when using anti-seize. Copper-based and zinc-based anti-seize compounds must never be used on nickel alloy fasteners – the galvanic potential difference between copper or zinc and nickel accelerates corrosion at the thread interface, particularly in wet acid environments.

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