In industrial plants, whether in the chemical, food, pharmaceutical or energy sectors, stainless steel structural profiles play a key role in ensuring durability, hygiene, and resistance to aggressive environments. Choosing the right profile means more than selecting a shape: it requires evaluating material grade, production technology, and specific application conditions. In this article, we’ll explore how to select the most suitable stainless steel profile, comparing grades and production methods such as hot extrusion and laser welding.
Why Use Stainless Steel in Industrial Applications?
Stainless steel is widely used in industrial settings due to its:
- Excellent corrosion resistance in humid, acidic, saline, or alkaline environments
- Thermal stability, ideal for high-temperature applications
- Hygienic properties and cleanability, crucial for regulated industries
- Low maintenance and long service life
This makes stainless steel ideal for frames, supports, guards, covers and structural components in industrial environments.
Choosing the Right Stainless Steel Grade
AISI 304
- Good corrosion resistance in mild environments
- Cost-effective for indoor or low-exposure installations
- Widely available and versatile
AISI 316 / 316L
- Contains molybdenum for enhanced resistance to chlorides and chemicals
- Ideal for food, chemical, marine, and pharmaceutical industries
- 316L is preferred for welded assemblies thanks to its low carbon content
Duplex S32205 (1.4462)
- Superior resistance to corrosion, fatigue, and stress cracking
- High mechanical strength
- Perfect for offshore, ventilation, and highly corrosive environments
Montanstahl also offers duplex stainless profiles, precisely laser-welded and dimensionally accurate, for demanding applications.
Hot Extrusion vs Laser Welding: Two Complementary Technologies
Depending on your design, quantity, and functional requirements, either of these two technologies may be the right choice when:
Hot Extrusion
- Ideal for solid and hollow profiles with uniform cross-sections
- Suitable for small production volumes (prototype possible)
- Possibility of profiles with undercuts
- Excellent mechanical integrity
Laser Welding (or Hybrid Welding)
- Ideal for custom and complex geometries, including asymmetric or variable-thickness designs
- Sharp-cornered profiles with the option for holes, slots, and cut-outs
- Enables tight dimensional tolerances
- Produces a clean aesthetic finish with nearly invisible weld seams ≥ 2 mm
At Montanstahl, both technologies are available, allowing full flexibility based on your project needs.
When to Use a Standard Profile and When to Go Custom?
Here’s a practical guide for choosing:
Choose a standard profile when:
- Standard grades: AISI 304L, 316L, or duplex available
- Delivery time
- Optimized production ensures controlled costs and minimal waste
- Standard dimensions and lengths meet design requirements
Choose a custom profile when:
- The environment is extremely corrosive or thermally demanding
- You need tight tolerances with custom lengths up to 15 meters
- The design includes space constraints or unique geometries
- Need for near-net-shape to avoid post processing or excessive welding on-site
Conclusion
Selecting the right stainless steel profile for your industrial plant is not just about availability, it’s about long-term performance, safety and efficiency.
By combining in-depth metallurgical know-how with advanced production capabilities, Montanstahl offers tailored stainless steel solutions that meet the most demanding technical requirements.
Whether you need an extruded AISI 316L profile for a food plant or a custom laser-welded duplex profile for an offshore ventilation system, we can support you with the right product, at the right tolerance, for the right application.
Need support with your project?
Contact us for technical consultation or explore our custom stainless steel profiles.