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Overview
2205 stainless steel, commonly known as duplex stainless steel 2205, is widely used where both strength and corrosion resistance are required. It combines the toughness of austenitic grades with the strength of ferritic stainless steels, delivering dependable performance in demanding conditions.
With its balanced mix of chromium, nickel and molybdenum, 2205 is built to last in harsh, chloride-rich environments where standard grades fall short. That’s why it’s trusted in offshore platforms, chemical plants and heavy-duty structural projects.
At Kormax, we supply 2205 stainless steel round bars, sheets and other profiles, cut and delivered to your specifications. Backed by our engineered materials solutions and global supply network, you’ll get reliable delivery and consistent quality every time.
Engineers choose duplex stainless steel 2205 because it stands up to tough environments and demanding service. You’ll find it in:
Common Applications
Offshore and marine structural components
Heat exchangers and pressure vessels
Chemical processing equipment
Food processing and biofuel systems
High-strength architectural supports
Water treatment and desalination plants
Key Features
Exceptional resistance to pitting, crevice corrosion and chloride stress corrosion cracking
Nearly double the yield strength of austenitic grades
Superior fatigue strength
Maintains integrity under cyclic loading and harsh environments
Good weldability and dimensional stability
Material Profile
2205 stainless steel offers nearly double the yield strength of standard austenitic grades, while keeping good weldability and dimensional stability. That makes it a versatile choice for projects where strength and corrosion resistance can’t be compromised.
Chemical Composition
Duplex stainless steel 2205 owes its strength and corrosion resistance to its balanced chemistry. High chromium and molybdenum levels deliver superior performance in aggressive settings. Every batch supplied by Kormax comes fully certified for peace of mind.
(Typical Composition %)
| Element | Symbol | Value |
| Carbon | C | ≤0.03 |
| Chromium | Cr | 22–23 |
| Nickel | Ni | 4.5–6.5 |
| Molybdenum | Mo | 3.0–3.5 |
| Nitrogen | N | 0.14–0.20 |
| Manganese | Mn | ≤2.0 |
| Silicon | Si | ≤1.0 |
| Sulfur | S | ≤0.02 |
Mechanical Properties
2205 stainless steel provides excellent fatigue strength and toughness, making it well-suited to cyclic loading and dynamic environments.
| Property | Value |
| Tensile Strength | ~655 MPa |
| Yield Strength | ≥ 485 MPa (often >550 MPa) |
| Elongation | ≥ 25% |
| Hardness | ≤ 30 HRC (~290 HB) |
Tolerances Chart
Kormax supplies 2205 stainless steel in line with ASTM A276 / A479 and ISO dimensional tolerances, so you can count on consistent quality and fit.
| Diameter (mm) | Tolerance Class | Tolerance (mm) |
| All sizes listed | H11 | +0 / -0.090 to -0.180 |
Manufactured in accordance with ASTM A276 / A479 and ISO tolerance standards.
Sizes & Availability
We stock a wide range of 2205 stainless steel round bar sizes, with custom cuts available on request. If you need a non-standard size, we can source it through our global foundry network.
Round Bars
| Diameter (mm) | KG per Metre | Tolerance | Length (m) |
| 44.45 | 12.34 | H11 | 3 |
| 50.80 | 16.11 | H11 | 3 |
* Custom grades and sizes available by request.
Explore More Stainless Steel Grades
Looking for an alternative? Explore our broader range of stainless steel materials, including:
Kormax is your reliable stainless steel supplier, helping engineers source the right materials for lasting performance.
Resources
Data Sheet
Stainless Steel 2205
Blog
A Guide to the Grades of Aluminium: Choosing the Right Alloy
Resource
Engineering Metal Bar Manufacturing Methods
PDF (298 KB)
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Quality Management
Quality materials, delivered to standard.
Kormax is ISO certified for ISO 9001, ISO 14001, and ISO 45001.
All Kormax products come with batch certifications.
Why Choose Kormax for Duplex Stainless Steel 2205
As a fourth-generation family-owned business, Kormax brings over 75 years of foundry and engineering metals experience to your project.
We operate in various sectors worldwide, utilising our leading engineering, manufacturing and global distribution capabilities to provide reliable solutions for engineers.
Expert Advice
Trusted advice on metal and profile selection for your application, backed by our engineered materials solutions.
Unique Range
Unique range of quality products, in industry-specific profiles and sizes, including casting alloys.
Top-tier Foundries
Global supply network with the ability to source specific sizes and metals through trusted stainless steel supplier partnerships.
Supply Security
For anyone working with critical materials like 2205 stainless steel, we provide custom supply options to enhance continuity.
Quality Management
With ISO 9001, ISO 14001 and ISO 45501 certification, our quality systems include complete batch traceability across all stainless steel grades.
Competitive Pricing
With a wide supplier network, Kormax balances quality and value, supporting long-term partnerships with 2205 stainless steel suppliers worldwide.