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Overview
304 stainless steel is the most used grade worldwide. Its austenitic composition provides excellent corrosion resistance, strength and formability. Known as an 18/8 chromium-nickel stainless steel, it has become the benchmark material for countless industries.
Kormax supplies grade 304 stainless steel in a wide range of profiles, including round bar, sheet and custom-cut material. With fast turnaround, batch certifications and technical support, we help engineers achieve dependable results in demanding projects.
304 stainless steel suppliers recommend this grade where safety, hygiene and durability cannot be compromised. Typical applications include:
Common Applications
Food processing equipment
Kitchen benches, sinks and utensils
Water and wastewater treatment systems
Architectural and structural components
Storage tanks, piping and valves
Heat exchangers and pressure vessels
Key Features
Excellent general corrosion resistance, including in mildly acidic and oxidising environments
High toughness even at cryogenic temperatures
Non-magnetic in annealed condition (slightly magnetic when cold worked)
Excellent fabrication, welding and polishing characteristics
Hygienic and easy to clean for sanitary environments
304 Stainless Steel Material Properties
Material Profile
The properties of 304 stainless steel make it versatile for both hygienic environments and structural applications.
Chemical Composition
The chemical balance of grade 304 stainless steel explains its durability. The chromium and nickel mix ensures corrosion resistance and dependable performance.
(Typical Composition %)
| Element | Symbol | Value |
| Carbon | C | ≤0.08 |
| Silicon | Si | ≤1.0 |
| Manganese | Mn | ≤2.0 |
| Phosphorus | P | ≤0.045 |
| Sulfur | S | ≤0.03 |
| Chromium | Cr | 18–20 |
| Nickel | Ni | 8–10.5 |
| Nitrogen | N | ≤0.10 |
Mechanical Properties
The mechanical properties of 304 stainless steel make it suitable for tanks, pressure vessels and structural work.
| Property | Value |
| Tensile Strength | ≥ 515 MPa (typ. 540–750 MPa) |
| Yield Strength | ~205 MPa (0.2% offset) |
| Elongation | ≥ 40% (A50mm) |
| Hardness | ≤ 201 HB |
Tolerances Chart
Kormax supplies 304 stainless steel to precise dimensional tolerances, ensuring reliability in engineering applications. All material conforms to ASTM A276 / A479 and meets ISO dimensional standards, aligning with our broader engineered materials solutions.
| Diameter (mm) Range | Tolerance Class | Tolerance (mm) |
| Up to 19.05 | H9 | +0 / -0.036 |
| 20 and above | H11 | +0 / -0.090 to -0.18 depending on size |
Conforms to ASTM A276 / A479 and dimensional tolerances as per ISO standards.
Sizes & Availability
304 Stainless Steel Round Bar
Kormax stocks stainless steel 304 round bars in a wide range of diameters. Standard lengths are available for supply, with custom sizes and grades available upon request.
| Diameter (mm) | KG per Metre | Tolerance | Length (m) |
| 3.00 | 0.06 | H9 | 3 |
| 4.00 | 0.1 | H9 | 3 |
| 5.00 | 0.16 | H9 | 3 |
| 6.00 | 0.23 | H9 | 3 |
| 6.35 | 0.25 | H9 | 3 |
| 7.94 | 0.39 | H9 | 3 |
| 8.00 | 0.41 | H9 | 3 |
| 9.53 | 0.57 | H9 | 3 |
| 10.00 | 0.62 | H9 | 3 |
| 12.00 | 0.91 | H9 | 3 |
| 12.70 | 1.00 | H9 | 3 |
| 15.88 | 1.57 | H9 | 3 |
| 16.00 | 1.59 | H9 | 3 |
| 16.00 | 1.61 | H9 | 3 |
| 19.05 | 2.26 | H9 | 3 |
| 20.00 | 2.49 | H11 | 3 |
| 20.00 | 2.5 | H9 | 3 |
| 22.23 | 3.07 | H9 | 3 |
| 25.00 | 3.89 | H9 | 3 |
| 25.40 | 4.02 | H11 | 3 |
| 28.58 | 5.08 | H9 | 3 |
| 30.00 | 5.61 | H11 | 3 |
| 31.75 | 6.28 | H11 | 3 |
| 35.00 | 7.62 | H9 | 3 |
| 38.10 | 9.04 | H11 | 3 |
| 40.00 | 9.95 | H9 | 3 |
| 44.45 | 12.31 | H11 | 3 |
| 45.00 | 12.6 | H9 | 3 |
| 50.00 | 15.55 | H9 | 3 |
| 50.80 | 16.07 | H11 | 3 |
| 57.15 | 20.34 | H11 | 3 |
| 60.00 | 22.39 | H9 | 3 |
| 63.50 | 25.11 | H11 | 3 |
| 65.00 | 26.28 | H9 | 3 |
| 76.20 | 36.16 | H11 | 3 |
| 88.90 | 49.16 | H9 | 3 |
| 101.60 | 64.29 | H11 | 3 |
| 114.30 | 81.27 | H11 | 3 |
| 152.40 | 144.65 | H11 | 3 |
| 127.00 | 100.33 | 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 choose the right material for lasting performance.
Resources
Data Sheet
Stainless Steel 304
Blog
A Guide to the Grades of Aluminium: Choosing the Right Alloy
Resource
Engineering Metal Bar Manufacturing Methods
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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 304 Stainless Steel
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 offer world-class 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 top-tier 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 304 stainless steel, we offer 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 can balance quality and value, supporting long-term partnerships with 304 stainless steel suppliers worldwide.