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Product Overview
Introduction to Stainless Steel 405 / AISI 405 / UNS S40500
MOKSH TUBES & FITTINGS LLP is a trusted supplier, exporter, importer, and stockist of a comprehensive range of Stainless Steel 405 products, including Pipes & Tubes, Pipe Fittings, Flanges, Fasteners, Sheets & Plates, Coils, Wires, Round Bars, Flat Bars, Angles, Channels, Wire Mesh, and various custom or hard-to-find components.
Stainless Steel 405 is a 12% chromium ferritic stainless steel, specially designed to minimize hardening when cooled from high temperatures. The addition of aluminium (~0.10–0.30%) improves its oxidation resistance and prevents excessive hardening during welding, making it particularly useful for welded or fabricated applications where post-weld annealing is not practical.
This grade offers moderate corrosion resistance, good weldability, excellent scaling resistance, and is magnetic in all conditions. It’s frequently used in automotive exhaust systems, annealing boxes, steam nozzles, turbine blades, and structural components exposed to mild environments.
Stainless Steel 405 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 1.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.030 max |
| Chromium (Cr) | 11.5 – 14.5 |
| Aluminium (Al) | 0.10 – 0.30 |
| Nickel (Ni) | 0.75 |
| Iron (Fe) | Balance |
The aluminium addition enhances oxidation resistance and prevents air-hardening during welding — a key reason SS 405 is favored for welded components and exhaust applications.
Technical Composition
Physical Properties of Stainless Steel 405
| Property | Value |
|---|---|
| Density | 7.75 g/cm³ |
| Melting Point | 1480 – 1530 °C |
| Modulus of Elasticity | 200 GPa |
| Thermal Conductivity | 24 W/m·K (at 100 °C) |
| Electrical Resistivity | 0.60 µΩ·m |
| Magnetic Properties | Fully Magnetic (Ferritic) |
Mechanical Properties of Stainless Steel 405
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 380 – 540 MPa | 55,000 – 78,000 psi |
| Yield Strength (0.2%) | 205 – 275 MPa | 30,000 – 40,000 psi |
| Elongation | 20% | 20% |
| Hardness (Brinell) | 150 – 170 HB | 150 – 170 HB |
SS 405 offers moderate strength and hardness, but excellent thermal stability and weldability, making it ideal for fabricated components exposed to heat and mild corrosion.
Products in Stainless Steel 405
MOKSH TUBES & FITTINGS LLP supplies a wide range of Stainless Steel 405 products in various forms. These products are widely used in industries such as Chemical Processing, Power Generation, Oil & Gas, Pulp & Paper, and many other engineering sectors. Stainless Steel 405 offers excellent oxidation and scaling resistance along with good ductility and machinability, making it suitable for applications that require moderate corrosion resistance and formability under elevated temperatures. It is an ideal material for components that must maintain mechanical integrity and durability in heat and mildly corrosive environments.
MOKSH TUBES & FITTINGS LLP supplies Stainless Steel 405 in a wide variety of product forms, including:
