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Monel K500 Studs Manufacturer & Exporter in India

Explore Monel K500 Studs 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

550

Max Temp

🌡

550

Suitable for continuous service up to approximately 550°C under typical operating conditions.

⚡

550

Typical tensile strength around 550 MPa depending on product form and heat treatment.

🛡

Excellent

Excellent corrosion resistance in a wide range of industrial environments.

⚖

8.8

Typical density is approximately 8.8 g/cm³.

Product Overview

What are Monel K500 Studs?

Monel K500 studs are precipitation-hardened nickel-copper alloy fasteners machined from UNS N05500 bar stock conforming to ASTM B865. The alloy combines the corrosion resistance of Monel 400 with significantly enhanced mechanical strength achieved through the addition of aluminium (2.30-3.15%) and titanium (0.35-0.85%), which form Ni3(Al,Ti) precipitates during age-hardening heat treatment.

With a minimum tensile strength of 1100 MPa in the age-hardened condition, Monel K500 studs outperform standard stainless steel and duplex fasteners in seawater, hydrofluoric acid, and sour hydrocarbon environments. They are specified under NACE MR0175/ISO 15156 for subsea wellhead assemblies, offshore riser clamps, and marine pump shafting flanges where both high strength and chloride immunity are mandatory.

Quick Specifications

MaterialMonel K500
UNS NumberN05500
DIN Number2.4375
Material StandardASTM B865
Stud Standard (Metric)DIN 938 / DIN 939 / ISO 4028
Stud Standard (Inch)ASME B18.31.2 / ASME B16.5
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M100 / ¼"-4"
Tensile Strength1100 MPa (160 ksi) min
Yield Strength790 MPa (115 ksi) min
HardnessMax 35 HRC / 330 HB
? All material certified by NABL-accredited laboratory. PMI available on request.

Complete the Fastener Set

Other Monel K500 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Monel K500 fastener range from certified nickel-copper alloy bar stock, including Monel K500 Bolts, Monel K500 Nuts, Monel K500 Screws, Monel K500 Washers, and Monel K500 Threaded Rods. All Monel K500 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Monel K500 Bolts
Monel K500 Nuts
Monel K500 Screws
Monel K500 Washers
Monel K500 Threaded Rods

Technical Data

Monel K500 Studs Dimensions, Sizes & Thread Standards

Monel K500 Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 938 (short end) / DIN 939 (long end) / ASME B18.31.2. Custom lengths in 5 mm increments. Inch dimensions available per ASME B16.5 and MSS SP-75. All Monel K500 studs dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Stud Bolt Dimensions - Metric (DIN 938 / DIN 939)

Size (M)Pitch (mm)Short End (mm)Long End (mm)Min L (mm)Max L (mm)
M61.061220200
M81.2581625250
M101.5102030300
M121.75122435400
M162.0163245500
M202.5204055600
M243.0244865700
M303.5306080900
M364.036721001000
M424.542841201200
M485.048961401500
M565.5561121601800
M646.0641281802000
M726.0721442002200
M806.0801602202500
M1006.01002002603000

Dimensional & Material Standards

StandardCoversThread
DIN 938Studs, short end engagementMetric
DIN 939Studs, long end engagementMetric
ISO 4028Studs, general purposeMetric
ASME B18.31.2Continuous thread studsUNC/UNF
ASME B16.5Stud bolts for flangesUNC
MSS SP-75Stud bolts, high-pressure fittingsUNC
ASME B1.1Unified inch screw threadsUNC/UNF
Material StandardRequirement
ASTM B865Bar/rod - UNS N05500
ASTM F467Fastener mechanical properties
NACE MR0175Sour service =35 HRC
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Monel K500 Chemical Composition

Monel K500 Studs are produced from a nickel-copper alloy containing 63% minimum nickel and 27–34% copper, with elemental limits certified to ASTM. The nickel base delivers seawater and HF acid immunity; copper additions enhance ductility; and in Monel K500, aluminium and titanium additions enable age-hardened strength above 896 MPa.

Chemical Composition per ASTM B865

ElementComposition (%)
Nickel + Cobalt (Ni+Co)63.0% min
Copper (Cu)27.0-33.0%
Aluminium (Al)2.30-3.15%
Titanium (Ti)0.35-0.85%
Iron (Fe)2.0% max
Carbon (C)0.25% max
Manganese (Mn)1.5% max
Silicon (Si)0.50% max
Sulphur (S)0.010% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Monel K500 Alloy Composition Matters for Studs

Al + Ti (2.30–3.15% / 0.35–0.85%) — Precipitation Hardening
Aluminium and titanium combine during age-hardening to form Ni3(Al,Ti) gamma-prime precipitates, raising tensile strength from approximately 550 MPa (annealed) to 1100 MPa minimum — without sacrificing the alloy's inherent corrosion resistance in seawater and reducing acids.
Cu (27–33%) — Hydrofluoric Acid & Seawater Immunity
The high copper content gives Monel K500 studs exceptional resistance to hydrofluoric acid at all concentrations and temperatures, and to flowing seawater at velocities up to 30 m/s — a critical advantage for pump and valve flange connections in marine service.
Low Carbon (0.25% max) — Thread Integrity
The controlled carbon ceiling minimises carbide precipitation at grain boundaries during machining and heat treatment, preserving thread root toughness and resistance to stress corrosion cracking in chloride-bearing environments under sustained bolt load.

Fastener Performance

Monel K500 Studs Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Monel K500 Studs per ASTM. Monel K500 studs achieve 550 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Tightening Torque Reference - Monel K500 Studs (Age-Hardened)

Stud SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M121159242
M16275220100
M20545436160
M24945756232
M3018901512368
M3632902632534
M4252504200736
M4878006240968
?? Anti-galling: Use nickel-based anti-seize (Molykote P-37 or Bostik Never-Seez Pure Nickel). Lubricated values assume K=0.15. Never use copper-based anti-seize on nickel-copper alloys - galvanic incompatibility accelerates thread corrosion.

Industry Applications

Monel K500 Studs Applications — Industries & End Uses

Monel K500 Studs from RealBolt are specified across marine, HF alkylation, desalination, and chemical processing where excellent corrosion resistance and 550 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples. Select an industry below to see specific Monel K500 studs application details and RealBolt stock availability.
Monel K500 stud bolts are the preferred fastener for ASME B16.5/B16.47 subsea wellhead flanges, BOP stack connections, and Christmas tree assemblies where simultaneous high clamping load and seawater corrosion immunity are required. Compliant with NACE MR0175/ISO 15156 for H2S sour service. Specified in Shell DEP 34.00.01 and ExxonMobil EMSP fastener standards.
Stud bolts and continuous thread studs for offshore platform riser clamps, mooring chain connectors, splash-zone structural joints, and marine propulsion shaft flange connections. Monel K500’s resistance to flowing seawater at velocities exceeding 30 m/s makes it the standard choice where cavitation-assisted corrosion eliminates stainless steel options.
Flange stud sets for multi-stage flash (MSF) and reverse osmosis (RO) desalination plant piping, seawater lift pump casings, and heat exchanger channel covers in coastal power and water treatment facilities. Monel K500 studs resist biofouling-induced crevice corrosion and chlorinated seawater attack that degrades duplex stainless steel fasteners within 18-24 months.
Stud bolt sets for hydrofluoric acid alkylation unit reactor flanges, HF transfer line connections, and fluoropolymer reactor closures where no other commercially available fastener alloy provides equivalent resistance. Also specified for sulphuric acid concentrations below 85% and organic acid service in pharmaceutical API manufacturing.

Monel K500 Studs Standards & International Certifications

Monel K500 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, Lloyds Register or DNV certification, NACE MR0175, and PMI (XRF) reports — available on request for all orders.
Standards
DIN 938 DIN 939 DIN 976-1 ASME B18.31.2 BS 1768 IS 1364 IS 1367
Certifications
ISO 9001:2015NACE MR0175NABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy Monel K500 Studs from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Monel K500 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

Monel K500 Studs — Frequently Asked Questions

Browse expert answers to common questions about Monel K500 Studs from RealBolt — covering Monel 400 vs K500 selection, seawater and HF acid resistance, ASTM B164/B865, sizes, and MTC documentation. Contact our technical team directly for project-specific guidance on Monel K500 studs selection and pricing.
Monel K500 studs are manufactured to DIN 938 (short end engagement), DIN 939 (long end engagement), ISO 4028 (general purpose), and ASME B18.31.2 (continuous thread studs) in metric and inch configurations. Flange stud bolts are supplied per ASME B16.5 for Class 150 to Class 2500 flanges and MSS SP-75 for high-pressure fittings. Custom thread forms including BSW, BSF, and BSPP are available on request with a 15 working day lead time.
Monel K500 studs are supplied in the age-hardened condition as standard – solution annealed at approximately 980°C followed by precipitation hardening at 595°C for 8 hours, then furnace cooled. This delivers a minimum tensile strength of 1100 MPa. Annealed (soft) condition is available on request for applications requiring subsequent cold forming or where NACE MR0175 hardness limits govern. All heat treatment is documented on the EN 10204 3.1 MTC.
Yes – Monel K500 has a magnetic permeability of =1.001 µ in the age-hardened condition, making it effectively non-magnetic. This is a critical selection criterion for naval vessel hull fittings, submarine pressure penetrations, and minesweeper deck hardware where magnetic signature must be minimised. Permeability test results can be included on the MTC on request.
In the age-hardened condition, Monel K500 studs are rated to 480°C continuous service. Above this temperature, the Ni3(Al,Ti) gamma-prime precipitates begin to dissolve, causing progressive strength reduction. For elevated-temperature applications above 480°C, Monel 400 (annealed) or Inconel 625 should be considered. Cryogenic performance is excellent – Monel K500 retains full toughness down to -196°C with no ductile-to-brittle transition.

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