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Titanium Grade 7 Washers Manufacturer & Exporter in India

Explore Titanium Grade 7 Washers Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
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-250

Min Temp

600

Max Temp

🌡

600

Suitable for continuous service up to approximately 600°C under typical operating conditions.

⚡

900

Typical tensile strength around 900 MPa depending on product form and heat treatment.

🛡

Outstanding

Outstanding corrosion resistance in a wide range of industrial environments.

⚖

4.5

Typical density is approximately 4.5 g/cm³.

Product Overview

What are Titanium Grade 7 Washers?

Titanium Grade 7 washers are corrosion-resistant fastener components manufactured from titanium alloy UNS R52400, which is essentially Grade 2 titanium stabilized with a small addition of palladium (0.12-0.25%). This alloy is renowned for its exceptional resistance to reducing acids, especially in chloride-rich and acidic environments, making it the preferred choice for critical chemical process and marine applications.

These washers are produced in accordance with ASTM B381 and ASTM B348 standards, ensuring high purity, mechanical integrity, and traceability. Titanium Grade 7 washers are widely specified for use with titanium bolts and nuts in flange assemblies, pressure vessels, and piping systems where maximum corrosion resistance is required, particularly in environments where Grade 2 titanium may be susceptible to crevice corrosion.

Quick Specifications

MaterialTitanium Grade 7
UNS NumberR52400
DIN Number3.7235
Material StandardASTM B381 / ASTM B348
Washer Standard (Metric)DIN 125 / DIN 127 / ISO 7089
Washer Standard (Inch)ASME B18.22.1
TypeFlat, Spring, Tab, Serrated
Diameter RangeM3-M64 / 1/8"-2½"
Tensile Strength345 MPa (50 ksi) min
Yield Strength275 MPa (40 ksi) min
HardnessMax 160 HB
? All washers supplied with full traceability and PMI certification. Third-party inspection available.

Complete the Fastener Set

Other Titanium Grade 7 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Titanium Grade 7 fastener range from certified titanium alloy bar stock, including Titanium Grade 7 Bolts, Titanium Grade 7 Nuts, Titanium Grade 7 Screws, Titanium Grade 7 Studs, and Titanium Grade 7 Threaded Rods. All Titanium Grade 7 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Titanium Grade 7 Bolts
Titanium Grade 7 Nuts
Titanium Grade 7 Screws
Titanium Grade 7 Studs
Titanium Grade 7 Threaded Rods

Technical Data

Titanium Grade 7 Washers Dimensions, Sizes & Thread Standards

Titanium Grade 7 Washers are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 125 (flat), DIN 127 (spring), ISO 7089 (plain), and ASME B18.22.1 (inch). Custom OD/ID and thickness available on request. All Titanium Grade 7 washers dimensions are verified against applicable DIN, ISO, and ASME B18

Flat Washer Dimensions - Metric (DIN 125 / ISO 7089)

Size (M)Inner Ø (mm)Outer Ø (mm)Thickness (mm)
M33.270.5
M66.4121.6
M88.4161.6
M1010.5202.0
M1213.0242.5
M1617.0303.0
M2021.0373.0
M2425.0444.0
M3031.0564.0
M3637.0665.0
M4243.0786.0
M4849.0926.0
M5657.01058.0
M6465.01158.0

Dimensional & Material Standards

StandardCoversType
DIN 125Flat washersMetric
DIN 127Spring lock washersMetric
ISO 7089Plain washersMetric
ASME B18.22.1Plain & lock washersInch
ISO 7090Chamfered washersMetric
Material StandardRequirement
ASTM B381Forged washers - UNS R52400
ASTM B348Bar/rod for machining
ASME SB-381Pressure equipment
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Titanium Grade 7 Chemical Composition

Titanium Grade 7 Washers are manufactured from commercially pure or alloyed titanium with elemental limits strictly controlled per ASTM and AMS specifications. Oxygen and nitrogen contents govern strength and ductility in CP grades; aluminium and vanadium additions in Ti-6Al-4V (Grade 5) deliver 896 MPa tensile strength at 4.43 g/cm³ density.

Chemical Composition per ASTM B348 / B381

ElementComposition (%)
Titanium (Ti)Balance
Palladium (Pd)0.12-0.25
Iron (Fe)0.30 max
Oxygen (O)0.25 max
Carbon (C)0.08 max
Nitrogen (N)0.03 max
Hydrogen (H)0.015 max
Other Elements (each)0.10 max
Other Elements (total)0.40 max
? All heats verified by spectrometry and certified to ASTM B348/B381. PMI and third-party inspection available.

Why Titanium Grade 7 Alloy Composition Matters for Washers

Palladium (0.12–0.25%) — Enhanced Acid Resistance
The addition of palladium to commercially pure titanium dramatically increases resistance to crevice corrosion and attack by reducing acids, especially hydrochloric and sulfuric acid. This makes Grade 7 washers ideal for chemical process and desalination plants.
Low Interstitials — High Ductility
Strict limits on oxygen, nitrogen, and carbon ensure excellent ductility and formability, allowing washers to be cold-formed or machined without embrittlement or cracking.
No Alloying with Aluminum or Vanadium
Unlike Grades 5 and 23, Grade 7 is unalloyed titanium with palladium only, ensuring maximum corrosion resistance and biocompatibility for critical applications.

Fastener Performance

Titanium Grade 7 Washers Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Titanium Grade 7 Washers per ASTM. Titanium Grade 7 washers achieve 900 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Bolt SizeRecommended Washer OD (mm)Recommended Thickness (mm)
M6121.6
M8161.6
M10202.0
M12242.5
M16303.0
M20373.0
M24444.0
M30564.0
M36665.0
?? Installation: Always use clean, burr-free washers with titanium fasteners. For critical joints, use a thin film of molybdenum disulfide or PTFE-based lubricant to prevent galling.

Industry Applications

Titanium Grade 7 Washers Applications — Industries & End Uses

Titanium Grade 7 Washers from RealBolt are specified across aerospace, marine, chemical processing, and medical devices where outstanding corrosion resistance and 900 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples. Select an industry below to see specific Titanium Grade 7 washers application details and RealBolt stock availability.
Titanium Grade 7 washers are the industry standard for flange assemblies, vessel manways, and piping supports in hydrochloric, sulfuric, and nitric acid service. Their palladium-stabilized composition ensures long-term resistance to crevice and pitting corrosion in aggressive chemical environments, outperforming stainless steel and Grade 2 titanium in reducing acids.
Flat and spring washers for seawater intake structures, evaporator brine circuits, and reverse osmosis plant hardware. Grade 7’s immunity to crevice corrosion in chloride-rich environments makes it ideal for submerged and splash-zone applications.
Washers for GMP-compliant process vessels, clean-in-place (CIP) systems, and sterile piping where ultra-high corrosion resistance and biocompatibility are required. Grade 7 is non-toxic and resists leaching, making it suitable for critical pharmaceutical environments.
Used in washers for bleaching towers, digester closures, and chemical dosing systems exposed to chlorine dioxide and acidic bleach liquors. Grade 7’s resistance to oxidizing and reducing acids ensures long service life and minimal maintenance.

Titanium Grade 7 Washers Standards & International Certifications

Titanium Grade 7 Washers 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, AMS material certification, AS 9100D traceability for aerospace grades, and NABL lab reports — available on request for all orders.
Standards
DIN 125A DIN 127 ISO 7089 ISO 7090 ASME B18.21.1 IS 1367
Certifications
ISO 9001:2015NABL LabPED 2014/68/EUEN 10204 3.1 / 3.2

Buy Titanium Grade 7 Washers from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Titanium Grade 7 Washers — 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.
022-6743-7972
+91 90226 36025
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Answers for Buyers

Titanium Grade 7 Washers — Frequently Asked Questions

Browse expert answers to common questions about Titanium Grade 7 Washers from RealBolt — covering grade selection, ASTM B348/F467, seawater immunity, weight saving, galling precautions, and certification. Contact our technical team directly for project-specific guidance on Titanium Grade 7 washers selection and pricing.
Titanium Grade 7 washers are available to DIN 125 (flat), DIN 127 (spring), ISO 7089 (plain), ISO 7090 (chamfered), and ASME B18.22.1 (inch). Custom OD, ID, and thickness can be supplied to client drawings. All washers are manufactured from ASTM B381 or B348 certified material with full traceability.
Yes – Titanium Grade 7 washers are specifically designed for superior resistance to hydrochloric acid and other reducing acids due to their palladium addition. They are the preferred choice for flange and vessel assemblies in HCl, outperforming Grade 2 and stainless steel in both pitting and crevice corrosion resistance.
Absolutely. Grade 7’s palladium-stabilized titanium is immune to crevice corrosion in seawater, making these washers ideal for desalination plants, offshore structures, and marine piping systems. No special coatings or cathodic protection are required for most marine applications.
There is no formal MOQ for standard sizes (M6-M24) held in stock – we supply from single pieces for urgent maintenance. Custom sizes or special profiles may require a 5 kg minimum. Quantity 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