SS 316 / 316L / 316Ti Washers Manufacturer & Exporter in India

Explore SS 316 / 316L / 316Ti Washers Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.

-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 SS 316 / 316L / 316Ti Washers?

SS 316 / 316L / 316Ti washers are austenitic stainless steel fastener components manufactured from UNS S31600, S31603, and S31635 flat-rolled or bar stock conforming to ASTM A240, ASTM A276, and ASTM A182. The molybdenum addition (2.0-3.0%) elevates pitting resistance well beyond standard 304 stainless, while the low-carbon 316L variant and titanium-stabilised 316Ti grade address sensitisation concerns in welded assemblies and elevated-temperature service respectively.

These washers are specified across chemical processing, marine, pharmaceutical, and food-grade industries where chloride exposure, crevice corrosion under bearing surfaces, and hygienic cleanliness requirements demand more than carbon steel or standard stainless can deliver. Available in flat, spring, and structural forms to DIN 125, DIN 127, DIN 9021, and ASME B18.21.1, SS 316 / 316L / 316Ti washers provide reliable load distribution and corrosion protection in bolted joint assemblies worldwide.

Quick Specifications

Material	SS 316 / 316L / 316Ti
UNS Number	S31600 / S31603 / S31635
DIN Number	1.4401 / 1.4404 / 1.4571
Material Standard	ASTM A240 / A276 / A182
Washer Standard (Metric)	DIN 125 / DIN 127 / DIN 9021 / ISO 7089
Washer Standard (Inch)	ASME B18.21.1 / ASME B18.21.2
Diameter Range	M3-M100 / #4-4"
Tensile Strength	515 MPa (75 ksi) min
Yield Strength	205 MPa (30 ksi) min
Hardness	Max 95 HRB / 217 HB
Finish	Plain / Passivated / Electropolished

? All material certified by NABL-accredited laboratory. PMI and EN 10204 3.1 MTC available on request.

Complete the Fastener Set

Other SS 316 / 316L / 316Ti Fastener Products Available from RealBolt

RealBolt also manufactures the complete SS 316 / 316L / 316Ti fastener range from certified bar stock per ASTM, including Bolts, Nuts, Screws, Studs, and Threaded Rods in all standard configurations. All SS 316 / 316L / 316Ti fastener types ship with EN 10204 MTC 3.1/3.2 documentation and are available in standard sizes and custom-machined specials.

SS 316 / 316L / 316Ti Bolts

SS 316 / 316L / 316Ti Nuts

SS 316 / 316L / 316Ti Screws

SS 316 / 316L / 316Ti Studs

SS 316 / 316L / 316Ti Threaded Rods

Technical Data

SS 316 / 316L / 316Ti Washers Dimensions, Sizes & Thread Standards

SS 316 / 316L / 316Ti Washers are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 125 (flat washers), DIN 127 (spring lock washers), DIN 9021 (large OD flat washers), and ISO 7089/7090. Inch dimensions available per ASME B18.21.1 and ASME B18.21.2.

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

Bolt Size (M)	Inner Dia (mm)	Outer Dia (mm)	Thickness (mm)
M3	3.2	7	0.5
M4	4.3	9	0.8
M5	5.3	10	1.0
M6	6.4	12	1.6
M8	8.4	16	1.6
M10	10.5	20	2.0
M12	13.0	24	2.5
M16	17.0	30	3.0
M20	21.0	37	3.0
M24	25.0	44	4.0
M30	31.0	56	4.0
M36	37.0	66	5.0
M42	43.0	78	7.0
M48	50.0	92	8.0
M56	58.0	105	9.0
M64	66.0	115	9.0

Dimensional & Material Standards

Standard	Covers	Type
DIN 125	Plain flat washers	Metric
DIN 127	Spring lock washers	Metric
DIN 9021	Large OD flat washers	Metric
ISO 7089	Flat washers, normal series	Metric
ISO 7090	Flat washers, chamfered	Metric
ASME B18.21.1	Flat & lock washers	Inch
ASME B18.21.2	Lock washers, inch	Inch

Material Standard	Requirement
ASTM A240	Plate/sheet - UNS S31600/S31603/S31635
ASTM A276	Bar/rod - UNS S31600/S31603/S31635
ASTM A182 F316/F316L	Forged washer blanks
EN 10204 3.1	Mill test certificate
EN 10204 3.2	TPI-witnessed MTC

Material Chemistry

SS 316 / 316L / 316Ti Chemical Composition

SS 316 / 316L / 316Ti Washers are manufactured from an iron-chromium-nickel alloy with chromium (16–26%), nickel (8–28%), and grade-specific molybdenum additions per ASTM and ASTM A193/A194. Chromium content governs the self-healing passive oxide film; molybdenum (2–6%) enhances chloride pitting resistance; and carbon content determines sensitization risk in welded assemblies.

Chemical Composition per ASTM A240 / EN 10088-3

Element	SS 316 (S31600)	SS 316L (S31603)	SS 316Ti (S31635)
Carbon (C)	0.08% max	0.03% max	0.08% max
Chromium (Cr)	16.0-18.0%	16.0-18.0%	16.0-18.0%
Nickel (Ni)	10.0-14.0%	10.0-14.0%	10.0-14.0%
Molybdenum (Mo)	2.0-3.0%	2.0-3.0%	2.0-3.0%
Titanium (Ti)	-	-	5×C min, 0.70% max
Manganese (Mn)	2.0% max	2.0% max	2.0% max
Silicon (Si)	0.75% max	0.75% max	0.75% max
Phosphorus (P)	0.045% max	0.045% max	0.045% max
Sulphur (S)	0.030% max	0.030% max	0.030% max
Nitrogen (N)	0.10% max	0.10% max	0.10% max

? All heats verified by NABL-accredited spectrometry. PMI testing available on request for every batch.

Why SS 316 / 316L / 316Ti Alloy Composition Matters for Washers

Mo (2.0–3.0%) — Crevice Corrosion Resistance Under Bearing Surfaces

Molybdenum raises the pitting resistance equivalent number (PREN) of 316 to approximately 24–26, providing meaningful resistance to chloride-induced crevice corrosion in the confined gap between washer and substrate — the most vulnerable zone in a bolted joint exposed to marine or chemical environments.

Low Carbon in 316L — Sensitisation-Free Welded Assemblies

The 316L variant limits carbon to 0.03% max, preventing chromium carbide precipitation at grain boundaries during welding or elevated-temperature service. 316L washers used in welded pipe flanges and pressure vessel nozzle connections retain full corrosion resistance in the heat-affected zone without post-weld annealing.

Titanium Stabilisation in 316Ti — High-Temperature Stability

316Ti adds titanium at a minimum of 5× the carbon content, which preferentially combines with carbon and prevents sensitisation at service temperatures up to 800°C. This makes 316Ti washers the preferred choice for exhaust flanges, heat exchanger covers, and furnace hardware where intermittent high-temperature exposure is unavoidable.

Fastener Performance

SS 316 / 316L / 316Ti Washers Mechanical Properties & Torque & Proof Load Reference

The table below lists mechanical properties and proof load reference for SS 316 / 316L / 316Ti Washers per ASTM. SS 316 / 316L / 316Ti washers achieve 620 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Washer Load & Bearing Stress Reference

Bolt Size	Washer OD (mm)	Washer ID (mm)	Thickness (mm)	Max Bearing Load (kN)
M8	16	8.4	1.6	12
M10	20	10.5	2.0	20
M12	24	13.0	2.5	32
M16	30	17.0	3.0	58
M20	37	21.0	3.0	92
M24	44	25.0	4.0	135
M30	56	31.0	4.0	215
M36	66	37.0	5.0	310

?? Anti-galling note: Apply PTFE-based or molybdenum disulphide paste to washer bearing faces in stainless-to-stainless contact to prevent galling under high clamp loads. Never use copper-based compounds on food-grade or pharmaceutical installations.

Industry Applications

SS 316 / 316L / 316Ti Washers Applications — Industries & End Uses

SS 316 / 316L / 316Ti Washers from RealBolt are specified across food and dairy, pharmaceutical, marine, chemical processing, and oil and gas where very good corrosion resistance and 620 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.

Chemical & Petrochemical Processing

SS 316 / 316L flat washers are standard in bolted flange assemblies on chemical reactors, heat exchangers, and process pipework handling dilute sulphuric acid, acetic acid, and chloride-bearing process streams. The molybdenum content provides the additional pitting resistance that 304 stainless cannot deliver in these environments. 316L is preferred for welded nozzle connections to avoid sensitisation.

Marine & Offshore Structures

316 and 316L washers are widely used in offshore platform structural connections, marine deck fittings, railing systems, and hull penetration hardware where continuous salt spray and splash-zone exposure demand reliable corrosion resistance. Large OD DIN 9021 washers distribute load effectively on GRP and aluminium deck panels without galvanic incompatibility issues.

Pharmaceutical & Food Processing Equipment

316L washers with electropolished finish are specified in pharmaceutical process equipment, food-grade conveyors, dairy processing lines, and clean-room structural connections. The low-carbon grade prevents sensitisation during CIP (clean-in-place) steam sterilisation cycles, and the smooth electropolished surface eliminates crevices that could harbour bacteria or product residue.

Water Treatment & Desalination Plants

SS 316 washers are used throughout reverse osmosis membrane housings, pressure vessel end-cap connections, and pump flange assemblies in desalination and water treatment plants. The combination of molybdenum content and passive oxide film provides long-term resistance to chlorinated water and brine concentrations encountered in RO reject streams.

SS 316 / 316L / 316Ti Washers Standards & International Certifications

SS 316 / 316L / 316Ti 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, IS 12427 compliance, ISO 3506 material certification, NACE MR0175, and PMI (XRF) reports — available on request for all orders.

Standards

DIN 125A DIN 126 DIN 127 DIN 128 DIN 433 DIN 434 DIN 436 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 IS 12427

Certifications

ISO 9001:2015PED 2014/68/EUNABL LabEN 10204 3.1 / 3.2RoHS Compliant

Buy SS 316 / 316L / 316Ti Washers from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified SS 316 / 316L / 316Ti 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.

Answers for Buyers

SS 316 / 316L / 316Ti Washers — Frequently Asked Questions

Browse expert answers to common questions about SS 316 / 316L / 316Ti Washers from RealBolt — covering ASTM A193/A194 grades, chloride resistance, temperature limits, sensitization, sizes, and MTC documentation. Contact our technical team directly for project-specific guidance on SS 316 / 316L / 316Ti washers selection and pricing.

What is the difference between SS 316, 316L, and 316Ti washers?

All three grades share the same base composition of 16-18% chromium, 10-14% nickel, and 2-3% molybdenum. The key differences are: SS 316 is the standard grade suitable for most industrial applications. SS 316L limits carbon to 0.03% max, preventing sensitisation (chromium carbide precipitation at grain boundaries) in welded assemblies and during steam sterilisation – making it the preferred choice for pharmaceutical, food-grade, and welded pipe flange applications. SS 316Ti adds titanium at 5× the carbon content minimum, which stabilises the alloy against sensitisation at continuous service temperatures up to 800°C – preferred for exhaust flanges, furnace hardware, and high-temperature process equipment where 316L’s lower carbon alone is insufficient.

Which washer standard should I specify - DIN 125, DIN 9021, or ASME B18.21.1?

DIN 125 (ISO 7089) is the standard flat washer for general bolted connections – normal OD, suitable for steel and stainless structural joints. DIN 9021 provides a significantly larger outer diameter (approximately 3× the bolt diameter) and is used where the substrate is soft, has low bearing strength, or where load must be distributed over a wider area – common in GRP, timber, aluminium, and insulation panel fixings. ASME B18.21.1 covers both flat and lock washers to inch dimensions and is specified for ASME-coded pressure vessel and piping connections in the US and export markets. If your project uses metric bolting to DIN 931/933 or ISO 4014/4017, specify DIN 125 or DIN 9021. For ASME B16.5 flange bolt sets, specify ASME B18.21.1.

Are SS 316 washers suitable for use with 316 stainless bolts and nuts without galling?

Stainless steel is inherently susceptible to galling (cold welding under high contact pressure and rotation) when stainless-to-stainless contact occurs. To prevent galling between 316 washers and 316 nuts or bolt heads, always apply a PTFE-based anti-seize compound or molybdenum disulphide paste to the washer bearing faces before assembly. Tighten to the specified torque in a single smooth motion rather than in multiple incremental passes where possible. For critical flange assemblies, consider using 316L washers with a slightly different hardness to the bolt and nut to reduce the risk of adhesive wear. Never use copper-based anti-seize on food-grade or pharmaceutical installations.

What surface finishes are available for SS 316 / 316L / 316Ti washers?

Standard supply is mill finish (2B or No. 1 hot-rolled surface) as punched or machined. Additional finishes available include: Passivated (per ASTM A967 or AMS 2700) – removes free iron from the surface and enhances the passive oxide film for improved corrosion resistance in aggressive environments. Electropolished – removes 20-30 µm from the surface, eliminating micro-crevices and producing a bright, hygienic finish specified for pharmaceutical, food-grade, and semiconductor applications. Satin / Brushed (No. 4 finish) – for architectural and decorative applications. All finishes are available with EN 10204 3.1 certification confirming compliance with the specified surface treatment standard.

Industrial Cities We Serve:

Ahmedabad
Aurangabad
Bengaluru
Chennai
Coimbatore
Faridabad
Gandhidham
Greater Noida
Gurugram
Hazira
Hosur
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Jamnagar
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Nagpur
Nashik
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