405 Stainless Steel Round Bar (UNS S40500)
405 Stainless Steel Round Bar (UNS S40500) is a chromium-based ferritic stainless steel alloyed with aluminum to provide excellent resistance to oxidation and sulfur-containing atmospheres at elevated temperatures. This grade is specifically designed for applications requiring good heat resistance, moderate corrosion resistance, and improved resistance to hardening during cooling from high temperatures. 405 stainless steel round bars are commonly used in furnace parts, refinery equipment, and other heat-resisting components.
Key Features
- UNS Number: S40500
- Aluminum-alloyed ferritic stainless steel for superior oxidation resistance
- Excellent resistance to scaling and sulfur-bearing environments
- Good resistance to hardening after high-temperature exposure
- Cost-effective, low-nickel stainless steel
- Magnetic in nature
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM / ASME | 405 |
| UNS | S40500 |
| EN | 1.4002 |
| DIN | X6CrAl13 |
| JIS | SUS 405 |
Sizes
- Diameter Range: 5 mm to 300 mm
- Length: 3 m, 6 m, or as per customer requirement
- Custom cut-to-length sizes available
405 Stainless Steel Chemical Composition
| Element | Percentage (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Chromium (Cr) | 11.5 – 14.5 |
| Aluminum (Al) | 0.10 – 0.30 |
| Nickel (Ni) | ≤ 0.50 |
| Manganese (Mn) | ≤ 1.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
UNS S40500 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 415 MPa |
| Yield Strength (0.2% Offset) | ≥ 205 MPa |
| Elongation | ≥ 20% |
| Hardness | ≤ 200 HB |
405 Physical Properties
| Property | Value |
|---|---|
| Density | 7.7 g/cm³ |
| Melting Point | 1480 – 1530°C |
| Thermal Conductivity | 24.9 W/m·K |
| Electrical Resistivity | 0.60 µΩ·m |
| Modulus of Elasticity | 200 GPa |
Types of 405 Stainless Steel Round Bar
- Hot Rolled Round Bar
- Cold Drawn Round Bar
- Bright Round Bar
- Turned and Polished Round Bar
Applications
- Furnace parts and heat-treating equipment
- Oil refinery and petrochemical components
- Heat exchangers and thermal processing equipment
- Automotive exhaust and emission systems
- Structural components exposed to high temperatures
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