ASTM / ASME / EN Certified

Stainless Steel 409M Sheets & Plates Manufacturer & Supplier in India

Engineering high-integrity transport fleets and heavy industrial systems demands mill-certified materials built for uncompromising structural safety. Backed by large-scale rolling facilities and ready mill inventory, Unicorn Metal Industries produces premium Stainless Steel 409M Sheets & Plates engineered for extreme dynamic loads.

As an established SS 409M Sheets & Plates Manufacturer in India, we serve as an approved supply partner for railway coach fabricators, public transport authorities, and global EPC contractors. Every batch undergoes rigorous metallurgical testing to guarantee IRS M-44 compliance, precise dimensions, and uniform finishes.

If your project scope also requires high-performance austenitic grades for chemical environments, seamlessly source our certified 304 Stainless Steel Sheets & Plates from the same plant. Partnering with a proven SS 409M Sheets & Plates Supplier in India like Unicorn Metal Industries secures direct factory pricing, complete heat traceability (EN 10204 3.1 MTC), and rapid dispatch.

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0.3 mm to 100 mmThickness Range

Up to 2000mm x 6000mmCustom Cut-to-Size

Cold Rolled / Hot Rolled / PolishedAvailable Finishes

Bundles of ASTM A240 SS 409M and RDSO C-K201 stainless steel sheets and plates stacked in a manufacturing factory yard in India.

Datasheet

Technical Specifications: SS 409M & SS Ck201

Our manufacturing setup processes premium SS 409M sheets with precision leveling, high-speed shearing, surface treatment, solution annealing, and complete non-destructive testing.

Core Technical Product Details

SHEET 01

Technical Parameter	Specification Scope & Stocking Capabilities
Governing Specifications	ASTM A240 / ASME SA240, IRS M-44, EN 10088-2, DIN, JIS
Primary Grade	SS 409M / SS Ck201 (X2CrNi12 / EN 1.4003 Equivalent)
Manufacturing Types	Cold Rolled Sheet (CR), Hot Rolled Plate (HR), Precision Shim
Standard Delivery Dimensions	Widths up to 2000mm \| Lengths up to 6000mm (Custom Cut-to-Size Available)
Thickness Range	0.3 mm to 100 mm
Surface Finish Options	HR (NO.1), CR, 2B, 2D, BA, NO.4, SATIN (Plastic Coated)

Grade Selection: SS 409M & SS Ck201 Sheets & Plates

Standard 409M Grade Characteristics: Direct Factory Stock

Standard 409M plates incorporate a stabilized 11% to 12.5% chromium matrix. As a trusted SS 409M Sheets & Plates Manufacturer in India, we fabricate high-tensile Stainless Steel 409M Sheets & Plates tailored for automotive exhaust systems, material handling chutes, and industrial structural frames.

SS Ck201 Sheets & Plates: Global Standards

Working with a reliable SS Ck201 Sheets & Plates Manufacturer in India guarantees material fully compliant with the stringent CK201 RDSO Spec. Choosing an expert SS Ck201 Sheets & Plates Supplier in India provides dual-certified RDSO C-K201 stainless steel plates that meet strict public transport engineering guidelines for 409M Plates for Railway Coaches.

Chemical Composition of Stainless Steel 409M / SS CK201

SHEET 02

Element	Material Percentage Breakdown (Weight %)
Carbon (C)	0.03% Maximum
Manganese (Mn)	0.80% – 1.50%
Silicon (Si)	1.00% Maximum
Phosphorus (P)	0.040% Maximum
Sulfur (S)	0.015% Maximum
Chromium (Cr)	11.00% – 12.50%
Nickel (Ni)	0.03% – 1.00%
Nitrogen (N)	0.030% Maximum

Mechanical & Physical Properties of SS 409M

SHEET 03

Mechanical Property	Metric Target Value
Tensile Strength	430 MPa Minimum
Minimum Yield Strength (0.2% Offset)	275 MPa Minimum
Minimum Elongation	20% Minimum
Density	7.8 g/cm³
Hardness	90 HRB Maximum

International Equivalent Grades Chart

SHEET 04

Standard / Grade	WERKSTOFF NR.	UNS Number	EN Standard	Indian Railway Standard
SS 409M / SS Ck201	1.4003	S40910 / S41003	X2CrNi12	IRS M-44 / CK201 RDSO Spec

Dimensional Standard, Size Range, and Surface Chart

Our plant processes high-precision SS 409M sheets across multiple gauges and lengths to suit exact drawing specifications.

Operational Scope	Standard Industry Capabilities
Manufacturing Standards	ASTM A240 / ASME SA240, IRS M-44, EN 10088-2
Thickness Capability	0.3 mm (Gauge) up to 100 mm (Heavy Structural Plate)
Available Product Forms	Coils, Plain Sheets, Shim Stock, Strips, Cut Blanks & Rings
Surface Treatments	Mill Finish (NO.1), Cold Rolled (2B/2D), Bright Annealed (BA), Brushed (NO.4), SATIN with Protective Film

Custom dimensions, special widths, and cut-to-length plates available upon request based on project drawings.

Applications

Applications of SS 409M & SS Ck201 Stainless Steel Sheets & Plates

Integrating premium Stainless Steel 409M Sheets & Plates protects structural assemblies against atmospheric corrosion, wet sliding wear, and mild oxidation:

APP / 01

Passenger Coach Shells

RDSO C-K201 stainless steel plates are used in LHB/Vande Bharat sidewalls, roofs, and underframes for high fatigue strength under track vibrations.

APP / 02

Freight Wagon Hoppers

Stainless Steel 409M Sheets & Plates line coal and ore hoppers, providing low friction and high resistance to wet sliding abrasion.

APP / 03

Automotive Exhaust Systems

Precision 409M sheets provide continuous heat and corrosion protection in catalytic converter shells and silencer casing modules.

APP / 04

Industrial Enclosures & Encasements

Provides versatile raw stock for outdoor electrical control cabinets, cable trays, and structural frames.

Sourcing through a verified SS 409M Sheets & Plates Supplier in India guarantees tight dimensional control and clean edge preparation for fast welding and assembly.

SS 409M Sheets & Plates Industrial Applications

Quality Assurance

Quality Testing Protocols & Certified Credentials

To maintain zero-defect manufacturing standards, every batch of SS 409M sheets and plates undergoes spectral chemical verification, mechanical load testing, and dimensional inspection.

Inspection / Test Type	Purpose & Field Advantage
ISO 9001:2015 Certification	Ensures reliable, standardized manufacturing quality.
EN 10204 3.1 Mill Test Report (MTC)	Verifies exact material strength and chemical makeup.
Microstructure & Weld Integrity Checks	Confirms high resistance to sensitization and heat-affected zone defects.
Non-Destructive Testing (NDT)	Ultrasonic and mechanical tests confirm internal soundness in heavy plates.
Export & Trade Clearances	Fully certified for hassle-free customs and international shipping.

View & Download Our Full-Resolution Quality Certificates

FAQ

Frequently Asked Questions

Why is SS Ck201 preferred over carbon steel for railway coaches?

RDSO C-K201 stainless steel plates provide higher strength-to-weight ratios and double the corrosion resistance of mild steel, enabling lighter coach designs, lower energy use, and a 30+ year service life without protective painting.

Do SS Ck201 and 409M plates meet Indian Railways RDSO and IRS M-44 specifications?

Yes. As a certified SS Ck201 Sheets & Plates Supplier in India, our supply fully complies with IRS M-44 and RDSO standards, accompanied by EN 10204 3.1 Mill Test Certificates and heat traceability.

How do 409M Plates perform in crash impact scenarios?

Grade 409M / Ck201 features high strain energy absorption upon impact, allowing passenger coach shells to absorb collision forces without brittle fracture.

Why are SS Ck201 plates specified for railway coach structures?

RDSO C-K201 stainless steel plates comply with Indian Railway technical standards, offering excellent strength, impact resistance, and corrosion stability, making them ideal for long-life passenger transport bodies.

How do SS 409M plates handle structural welding?

SS 409M plates exhibit good weldability using TIG, MIG, and arc welding methods, retaining structural integrity and ductility in welded joints.

What makes SS 409M suitable for automotive exhaust systems?

SS 409M's ferritic structure provides excellent heat resistance up to 650°C, corrosion protection against exhaust gases, and cost-effectiveness compared to austenitic alternatives.

Can I source custom thicknesses and widths of SS 409M plates from an Indian manufacturer?

Absolutely. As a dedicated SS 409M Sheets & Plates Manufacturer in India, we offer full customization including thickness ranges from 0.3mm to 100mm and widths up to 2000mm with precision edge cutting.

Request a Technical Sourcing Quote

Whether you are designing railway transport coaches or industrial material handling systems, our engineering team is ready to assist with your material submittals. Contact Unicorn Metal Industries, an established SS 409M Sheets & Plates Supplier in India, today to receive factory quotes, material test certificates, and immediate delivery schedules.

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