SS Plate Thicknesses & Dimensions – Size Chart, Tolerances & Selection Guide

What Are the Standard Thicknesses and Sizes of Stainless Steel Plates?

Stainless steel plates are available in a wide variety of thicknesses and dimensions to suit structural, pressure, marine, decorative, and hygienic applications. Thicknesses typically range from 3 mm to 100 mm and beyond, while width and length can vary based on mill output and customer-specific cut-to-size requirements. Common stainless grades like SS 304, SS 316, SS 321, and Duplex are available in both standard and custom dimensions.

Applications Based on Plate Thickness & Dimensions

Different applications require different sizes of stainless steel plates:

• Thin Plates (3–6 mm): Ideal for cladding, decorative applications, and lightweight structures
• Medium Plates (6–25 mm): Used in pressure vessels, dairy/pharma processing equipment, kitchen equipment, and tanks
• Thick Plates (25 mm–60 mm+): Suitable for marine platforms, heavy-duty machinery, oil & gas, chemical reactors, and defense equipment
• Cut-to-Size Plates: Used when exact dimensioning is required in fabrication with minimal wastage

Performance Factors Based on Thickness

Plate thickness impacts the following:

• Structural Load Bearing: Thicker plates handle higher stress
• Heat Resistance: Thick plates better withstand temperature variation
• Corrosion Resistance: Uniform thickness ensures better passivation and longevity
• Fabrication Ease: Thinner plates are easier to bend, while thicker ones require advanced cutting/welding

International Standards for SS Plate Sizes & Tolerances

Stainless steel plates are governed by global standards such as:

• ASTM A240 / A480 – for flat rolled stainless plate and sheet
• EN 10088 / EN 10028 – for European dimensional and thickness standards
• IS 6911 (BIS India) – Indian standard for dimensions and tolerances of SS plates
• ASME SA240 – for pressure vessel use in industrial applications

Standard tolerance classes:

• Thickness tolerance: ±0.3 to ±0.75 mm depending on gauge
• Width tolerance: ±10 mm (cut edge), ±20 mm (mill edge)
• Length tolerance: ±10 mm for cut lengths
• Flatness tolerance: According to ASTM A480M Table A1.1

Stainless Steel Plate Size Chart (mm & inches)

Here’s a reference chart of common stainless steel plate sizes:

Thickness (mm)	Width (mm)	Length (mm)	Notes
3.0 mm	1000 / 1250 / 1500	2500 / 3000 / 6000	Also available in coils
5.0 mm	1250 / 1500 / 2000	3000 / 6000 / 8000	Used in tanks, pharma
8.0 mm	1250 / 1500 / 2000	3000 / 6000 / 8000	Pressure vessels
10–25 mm	1500 / 2000	6000 / custom-cut	Structural & fabrication use
40–60 mm	1500 / 2000	Custom-cut	Marine, chemical plants
65 mm+	Custom	Custom	Heavily engineered projects

Custom sizes, mirror finish sheets, and plates above 80 mm thickness can be offered on request.

Plate Finishes and Flatness Control

• Mill Finish / HRAP: Standard hot rolled annealed and pickled
• 2B / BA Finish: Cold-rolled smooth finish for pharma & food industry
• No. 4 / Brush / PVC Coated: Architectural and visible surface usage
• Mirror / Super Mirror: Reflective plates for interior & décor

All plates are leveled using precision flattening machines to maintain optimal flatness tolerance.

Fabrication Guidelines Based on Plate Thickness

• Cutting: Thinner plates can be sheared; thicker plates require plasma, laser, or waterjet cutting
• Welding: SS 304/316 plates can be TIG or MIG welded; Duplex may require special electrodes
• Bending: Up to 8 mm plates can be bent in press brakes; thick plates require rolling
• Machining: Heavier plates can be machined into flanges, rings, or tank components

Custom Profile Cutting Services at Hindustan Steel Corporation

We offer CNC cutting and plate profiling services including:

• Plasma & Laser Cutting for complex shapes
• Beveling & Edge Preparation for welding
• Plate Drilling & Machining for bolted flanges and equipment
• Polishing & Surface Finishing on request

Why Buy Stainless Steel Plates from Hindustan Steel Corporation?

• Complete Inventory from 3 mm to 100 mm thickness
• Ready Stock of 304 / 316 / 321 / 904L / Duplex Grades
• Mirror & Decorative Finishes Available
• Profile Cut, Flattened, and Tested Plates
• PAN India and Global Supply Reach
• Trusted by OEMs, Fabricators, EPCs, and Process Plants

Global Export Supply & Customized Packing Options

Hindustan Steel Corporation exports stainless steel plates worldwide, especially to:

• UAE, Saudi Arabia, Qatar, South Africa, Vietnam, Kenya, and Germany
• Sector-specific shipments for pressure vessels, marine parts, architectural panels, and food-grade tanks

We offer:

• Export-grade wooden pallet or seaworthy packaging
• Markings: Heat number, grade, thickness, batch number
• Surface protection: PVC wrap, paper interleaf, edge guards, or plastic film
• Test certificates & dimensional compliance reports included

How to Select the Right SS Plate Thickness for Your Project?

Here’s a quick guide:

• 1.5 to 4 mm: Kitchen equipment, appliances, auto panels
• 4 to 8 mm: Tanks, food processing machinery, doors
• 8 to 20 mm: Pressure vessels, structural fabrication, marine hardware
• 25 mm+: Heat exchangers, chemical reactors, load-bearing bases

Tip: Always factor in load, corrosion risk, fabrication methods, and regulatory norms (ASTM/EN/ASME/IS).

Certifications & Quality Control for Plate Sizes

All plates comply with:

• ASTM A240 / EN 10028-7 / ASME SA240 dimensional tolerances
• BIS IS 6911 & ISO 9001 production standards
• Mill Test Certificates (MTC) issued with every dispatch
• Plates are ultrasonically tested (if ordered) and dimensionally verified via calibrated tools

FAQs for SS Plate Thicknesses & Dimensions