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ASTM A193 Grade B16 Washers Manufacturer & Exporter in India

Explore ASTM A193 Grade B16 Washers 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 B16 Washers?

ASTM A193 Grade B16 washers are high-strength alloy steel flat washers manufactured to support bolted joints in high-pressure, high-temperature, and petrochemical applications. Produced from chromium-molybdenum-vanadium steel, these washers are designed to complement Grade B16 bolts and studs, providing reliable load distribution and resistance to stress relaxation at elevated temperatures up to 593°C (1100°F).

ASTM A193 B16 washers are commonly specified for use with pressure vessel flanges, heat exchangers, and refinery piping systems where both mechanical strength and creep resistance are critical. All washers are supplied with full traceability and certification to ASTM A193/A194 and EN 10204 3.1 standards.

Quick Specifications

MaterialAlloy Steel (Cr-Mo-V)
UNS NumberK32045
DIN Number1.7711
Material StandardASTM A193 Grade B16
Washer Standard (Metric)DIN 125 / DIN 127 / DIN 9021
Washer Standard (Inch)ASME B18.22.1
TypeFlat, Spring, Fender, Custom
Diameter RangeM6-M100 / 1/4"-4"
Hardness35-45 HRC
Max Service Temp593°C (1100°F)
? All washers supplied with EN 10204 3.1 certification. Hardness and PMI reports available on request.

Complete the Fastener Set

Other ASTM A193 Grade B16 Fastener Products Available from RealBolt

RealBolt also manufactures the complete ASTM A193 Grade B16 fastener range — ASTM A193 Grade B16 Bolts, ASTM A193 Grade B16 Nuts, ASTM A193 Grade B16 Screws, ASTM A193 Grade B16 Studs, ASTM A193 Grade B16 Threaded Rods — from certified bar stock per ASTM with full EN 10204 MTC 3.1/3.2 documentation and fast Mumbai dispatch.
ASTM A193 Grade B16 Bolts
ASTM A193 Grade B16 Nuts
ASTM A193 Grade B16 Screws
ASTM A193 Grade B16 Studs
ASTM A193 Grade B16 Threaded Rods

Technical Data

ASTM A193 Grade B16 Washers Dimensions, Sizes & Thread Standards

ASTM A193 Grade B16 Washers are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 125 (flat), DIN 127 (spring), DIN 9021 (fender), and ASME B18.22.1. Custom OD/ID and thickness available. Metric and inch sizes supplied to order.

Flat Washer Dimensions - Metric (DIN 125)

Size (M)Inner Ø (mm)Outer Ø (mm)Thickness (mm)
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
M7273.013010.0
M8081.014010.0
M100101.018012.0

Dimensional & Material Standards

StandardCoversType
DIN 125Flat washersMetric
DIN 127Spring lock washersMetric
DIN 9021Fender washersMetric
ASME B18.22.1Plain & lock washersInch
ISO 7089Flat washersMetric
ISO 7090Chamfered washersMetric
Material StandardRequirement
ASTM A193 B16Alloy steel, quenched & tempered
ASTM A194 7Compatible nuts
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

ASTM A193 Grade B16 Chemical Composition

ASTM A193 Grade B16 Washers 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 B16

ElementComposition (%)
Carbon (C)0.37-0.48
Manganese (Mn)0.75-1.00
Phosphorus (P)0.035 max
Sulfur (S)0.040 max
Silicon (Si)0.15-0.35
Chromium (Cr)0.80-1.10
Molybdenum (Mo)0.40-0.60
Vanadium (V)0.20-0.30
Nickel (Ni)0.25 max
Copper (Cu)0.20 max
? All heats verified by NABL-accredited spectrometry. Full traceability and PMI available.

Why ASTM A193 Grade B16 Alloy Composition Matters for Washers

Cr-Mo-V Alloy — High-Temperature Strength
Chromium, molybdenum, and vanadium combine to provide ASTM A193 Grade B16 washers with excellent creep resistance and mechanical stability at temperatures up to 593°C, making them ideal for petrochemical and power plant bolted joints.
Controlled Carbon & Manganese
The specified carbon and manganese content ensures a balance of hardness and ductility, preventing washer cracking under high bolt loads and thermal cycling.
Low Phosphorus & Sulfur
Strict limits on phosphorus and sulfur minimize the risk of embrittlement and intergranular corrosion, ensuring long-term reliability in aggressive service environments.

Fastener Performance

ASTM A193 Grade B16 Washers Mechanical Properties & Hardness Reference

The table below lists mechanical properties and hardness reference for ASTM A193 Grade B16 Washers per ASTM. ASTM A193 Grade B16 washers achieve 620 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 Washer Thickness (mm)
M12242.5
M16303.0
M20373.0
M24444.0
M30564.0
M36665.0
M42786.0
M48926.0
?? Washer selection: Always match washer hardness to bolt grade. For B16 bolts, use only B16 or higher hardness washers to prevent embedding and loss of preload.

Industry Applications

ASTM A193 Grade B16 Washers Applications — Industries & End Uses

ASTM A193 Grade B16 Washers 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 B16 washers are specified for use with B16 bolts and nuts in high-pressure vessel flanges, heat exchangers, and reactor closures in refineries and petrochemical plants. Their high hardness and creep resistance ensure reliable load distribution under thermal cycling and sustained pressure.
Flat and spring washers for steam turbine casings, HRSG ducting, and boiler manways where high-temperature strength and resistance to stress relaxation are critical for maintaining gasketed joint integrity.
Used in bolted joints for process piping, reactors, and pressure vessels handling aggressive chemicals at elevated temperatures, where standard carbon steel washers would fail due to softening or corrosion.
Washers for flange joints in gas transmission pipelines, compressor stations, and metering skids, providing secure load transfer and preventing bolt head embedding in high-pressure service.

ASTM A193 Grade B16 Washers Standards & International Certifications

ASTM A193 Grade B16 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, hardness test certificate, dimensional inspection report, and proof load test records — available on request for all orders.
Standards
DIN 125A DIN 126 DIN 127 DIN 128 DIN 433 DIN 434 DIN 436 DIN 440 DIN 6796 DIN 6797 DIN 9021 ISO 7089 ISO 7090 ISO 7091 ISO 7092 ISO 7093 ISO 7094 ASME B18.21.1 EN ISO 7089 BS 4320 IS 5372 IS 1367
Certifications
ISO 9001:2015PED 2014/68/EUNABL LabMTC 3.1 / 3.2

Buy ASTM A193 Grade B16 Washers from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified ASTM A193 Grade B16 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.
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Answers for Buyers

ASTM A193 Grade B16 Washers — Frequently Asked Questions

Browse expert answers to common questions about ASTM A193 Grade B16 Washers 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 B16 washers selection and pricing.
ASTM A193 Grade B16 washers are supplied to DIN 125 (flat), DIN 127 (spring), DIN 9021 (fender), ISO 7089/7090, and ASME B18.22.1 (inch). Custom OD, ID, and thickness are available to suit flange and piping requirements. All washers are manufactured from B16 alloy steel and supplied with EN 10204 3.1 certification.
Yes – ASTM A193 Grade B16 washers are engineered for continuous service up to 593°C (1100°F) and maintain hardness and load distribution under thermal cycling. They are ideal for steam, refinery, and power plant bolted joints where standard washers would soften or lose preload.
ASTM A193 Grade B16 washers are specifically designed for use with B16 bolts and nuts, but can also be used with other high-strength alloy steel fasteners (such as B7 or L7) where matching hardness is required. Always ensure washer hardness is equal to or greater than the bolt grade to prevent embedding.
No formal MOQ for standard sizes (M12-M36) held in stock – we supply from single pieces for urgent maintenance. Custom sizes or special coatings may require a 10 kg minimum. Quantity price breaks are available at 50 pcs, 200 pcs, and 500 pcs.

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