Stainless Steel 321 Sheet Specifications

This table lists Stainless Steel 321 Sheet technical specs and measurements. Check these numbers for your application's material qualities and sizing.

Property Specification / Details
Standard ASTM A240 / ASME SA240, AMS 5510, EN 10088-2
Thickness 0.3 mm to 6.0 mm (Cold Rolled); 3.0 mm to 6.0 mm (Hot Rolled)
Width 1000mm, 1219mm, 1250mm, 1500mm, 2000mm
Length 2000mm, 2440mm, 3000mm, 6000mm
Standard Sheet Size 4' x 8', 4' x 10', 5' x 10', 1m x 2m
Finish 2B, BA, No. 4 (Brushed), No. 1 (HRAP), Dull Finish
Form Sheets, Coils, Plates, Perforated Sheet, Shim Sheet
Condition Annealed, Solution Annealed (for 321H)

Surface Finishes

Selecting the appropriate surface finish ensures your material meets both functional and aesthetic requirements. Review the available SS 321 options below:

  • 2D Finish
  • 2B Finish
  • No. 1 Finish
  • No. 4 Finish
  • BA Finish

Stainless Steel 321 Sheet Sizes

Refer to the following tables for the standard dimensional ranges and common stock sizes of SS 321 sheets.

SS 321 Sheet Standard Size Chart

View the industry-standard dimensions for width and length.

Parameter Metric Range (mm) Imperial Range (inch/ft)
Thickness Range 0.25 mm – 6.35 mm 0.010" – 0.250"
Standard Widths 610, 914, 1219 mm 24", 36", 48"
Standard Lengths Up to 3048 mm Up to 120"
Common Sheet Sizes 1219 x 2438 / 1250 x 2500 mm 4' x 8' / 4.1' x 8.2'
Tolerances ASTM A480 / ASME SA480 -

Standard Sheet Dimensions

Reference the precise thickness ranges available for your project.

Gauge (MSG) Thickness (inch) Thickness (mm) Weight (kg/m²)
26 Ga 0.0178" 0.45 mm 3.58 kg
22 Ga 0.0313" 0.80 mm 6.34 kg
18 Ga 0.0500" 1.27 mm 10.07 kg
14 Ga 0.0781" 1.98 mm 15.71 kg
11 Ga 0.1250" 3.18 mm 25.18 kg
1/4" Plate 0.2500" 6.35 mm 50.36 kg

Custom Cutting & Sizes

Sachiya Steel International offers custom-cutting for non-standard dimensions. Slit coils, precision-cut blanks, and close-tolerance widths are produced to fulfil exacting client demands in short lead times.

Stainless Steel 321 Sheet Price

Several variables influence Stainless Steel 321 sheet costs, including gauge, surface finish, and fluctuating raw material markets. Note that AMS 5510 certified stock is priced higher than basic ASTM A240 material. Regionally, you’ll find Indian rates around ₹250–₹500/kg, while US retail spans $85 to $2,900 per sheet. For precise mill quotes or volume-based savings, Sachiya Steel International is your go-to source. They help navigate these complex pricing factors easily.

Chemical Composition of Stainless Steel 321 Sheet

The table below lists the chemical composition of ASTM A240 Type 321 (UNS S32100) stainless steel sheet per ASME SA-240.

Titanium content is calculated as a multiple of combined carbon and nitrogen. It locks carbon into stable titanium carbides, preventing sensitisation during thermal cycling.

Carbon C
Max 0.08%
Manganese Mn
Max 2.00%
Phosphorus P
Max 0.045%
Sulfur S
Max 0.030%
Silicon Si
Max 1.00%
Chromium Cr
17.0 – 19.0%
Nickel Ni
9.0 – 12.0%
Titanium Ti
5×(C+N) min, 0.70% max
Nitrogen N
Max 0.10%
Iron Fe
Balance

Mechanical Properties of 321 Stainless Steel Sheet

ASTM A240 Type 321 sheet meets the following minimum mechanical property values per ASME SA-240.

The 35% minimum elongation makes 321 SS sheet well-suited for forming, bending, and deep-drawing operations.

515 / 75
MPa (ksi)
Tensile Strength
205 / 30
MPa (ksi)
Yield Strength
35%
(min)
Elongation
Property Value
Tensile Strength (min) 515 MPa / 75 ksi
Yield Strength, 0.2% Offset (min) 205 MPa / 30 ksi
Elongation in 2 in. (min) 35%
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Equivalent Designations

The table below maps Stainless Steel 321 sheet designations across international standards for procurement cross-referencing.

Standard / Region Designation
EN / DIN (Germany / EU) 1.4541 / X6CrNiTi18-10
JIS (Japan) SUS 321
GOST (Russia) 08Kh18N10T
AFNOR (France) Z6CNT18-10
GB (China) 06Cr18Ni11Ti

Stainless Steel 321 Sheet Industrial Applications

321 stainless steel sheet serves 3 primary industrial sectors: chemical processing, aerospace, and energy. Titanium stabilisation makes it the preferred choice wherever welded sheet components face sustained temperatures above 427°C (800°F).

Chemical Processing

Heat exchanger shells, reactor vessel linings, and distillation column internals use SS 321. The grade resists organic and inorganic acid intergranular attack at high service temperatures, where unstabilized grades fail.

Aerospace & Defense

Exhaust shrouds, engine cowlings, and firewalls use AMS 5510-certified 321 stainless steel sheet. Its structure survives heat cycles between ambient and operational temperatures.

Oil & Gas and Power Generation

This sector uses stack liners, expansion joints and furnace parts. SS 321 sheet resists weld zone corrosion from flue gas temperatures and thermal expansion.

321 vs 304 Stainless Steel Sheet

Refer to the following comparison table to understand how Titanium stabilisation differentiates Type 321 from standard Type 304 for high-temperature service.

Intergranular corrosion is prevented by titanium in 321 stainless steel sheets at 427°C to 816°C (800°F to 1500°F). Before sensitisation, type 304 sheet can only be used continuously at 425°C (800°F). Choose the 321 sheet for welded components over 427°C. For general corrosion resistance below that threshold, 304 is cheaper.

Feature SS 321 (Titanium Stabilised) SS 304 (Standard Austenitic)
Alloying Element Titanium (Ti) Added No Titanium
Max Service Temp Up to 816°C (1500°F) Up to 425°C (800°F)
Sensitization Risk Immune (Ti-stabilised) High (above 425°C)
Welding Suitability Excellent for high-heat use Prone to weld decay at high heat
Primary Advantage Prevents intergranular corrosion Cost-effective general resistance

321 vs 316 Stainless Steel Sheet

Use this technical comparison to decide between the heat resistance of SS 321 and the chemical composition of SS 316 for your specific environment.
321 sheet excels in high-temperature service up to 815°C (1500°F), while 316 sheet offers stronger resistance to chloride and acid corrosion at lower temperatures. The 2–3% molybdenum in 316 provides pitting resistance that 321 lacks. Choose 321 for heat-exposed welded applications and 316 for marine or chemical environments below 427°C.

Feature SS 321 (Heat Grade) SS 316 (Marine Grade)
Molybdenum (Mo) None 2.0% – 3.0%
Pitting Resistance Moderate Superior (High PREN)
Chloride Resistance Standard High (Excellent for Saltwater)
Acid Resistance Good for oxidising acids Superior for Phosphoric/Acetic acids
Best Use Case Exhausts, Aircraft, High-heat Marine, Chemical, Pharmaceutical

Shipping & Packaging

Main export packaging setup Heavy-duty wooden boxes Packing
Export Packaging Standard

We strictly follow seaworthy export handling standards to protect stainless steel 321 sheets from transit damage, moisture ingress, and surface contamination during long-distance dispatch.

  • Heavy-duty wooden boxes with moisture barrier lining
  • HDPE stretch film wrapping on all bundles
  • Edge and corner protection with plastic padding
  • Silica gel desiccants to minimize moisture exposure
  • ISPM-15 fumigated wooden packaging for export
shipping preparation Sheet Bundle Yard Staging
Shipping packaging Sheet Bundle Edge Protection
Shipping stock Wrapped Export-Ready Bundles

We Export Worldwide

Sachiya Steel International supplies stainless steel products to major industrial markets across North America, Europe, the Middle East, Asia and Africa with export-ready documentation and logistics support.

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Frequently Asked Questions:

What sizes are available for Stainless Steel 321 Sheet? +
SS 321 sheet is offered in thicknesses ranging from 0.010″ to 0.250″ (0.25–6.35 mm), widths of 24″, 36″, and 48″ (610–1219 mm), and lengths up to 120″ (3048 mm). Standard dimensions comprise 4′×8′ and 4′×10′. Custom dimensions can be provided upon request.
What is the maximum service temperature for 321 Stainless Steel Sheet? +
321 stainless steel sheet handles continuous service up to 815°C (1500°F) and intermittent service up to 870°C (1600°F). A stabilising treatment at 845–900°C provides optimum intergranular corrosion resistance.
Can 321 Stainless Steel Sheet be welded without post-weld annealing? +
Yes. Titanium in 321 sheets stabilises the alloy and eliminates heat-affected chromium carbide precipitation. Carbon is locked up by this element to prevent intergranular corrosion after high heat. Fabricators can avoid post-weld annealing for most average projects.
Is 321 Stainless Steel Sheet magnetic? +
321 stainless steel sheet is non-magnetic in the annealed condition because it's an austenitic grade. Cold working may induce slight magnetism.
What is the difference between 321 and 304 Stainless Steel Sheet? +
321 sheet contains titanium, which prevents intergranular corrosion at 427–816°C. Type 304 sheet is limited to roughly 425°C for continuous service. Choose 321 when welded components operate in sustained heat above 427°C.
What finishes are available for 321 Stainless Steel Sheet? +
321 SS sheet is commonly supplied in 2D and 2B finishes. Hot-rolled No. 1 finish and polished finishes (No. 4, BA) are available on request. Note that 321 doesn't polish as cleanly as 304.
What is the price of Stainless Steel 321 Sheet? +
Pricing depends on thickness, dimensions, quantity, finish, and market conditions. US retail cut-to-size prices range from approximately $85 to $2,900 per sheet. Request a quote for current mill and bulk pricing.
What are the main applications for 321 Stainless Steel Sheet? +
321 SS sheet is used in chemical processing (heat exchangers, vessel linings), aerospace (AMS 5510 components), oil and gas (stack liners), and power generation (expansion joints, furnace parts).

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