EV8 Stainless Steel Round Bar (UNS EV8 / WNr. 1.4871)
EV8 Stainless Steel Round Bar (UNS EV8, WNr. 1.4871) is a heat-resistant stainless steel grade engineered for applications involving elevated temperatures and mechanical stress. Known for its good strength retention, oxidation resistance, and reliable performance under thermal cycling, EV8 round bars are commonly used in high-temperature structural and engineering components. The alloy offers a balanced combination of corrosion resistance, mechanical stability, and fabricability, making it suitable for demanding industrial environments.
Key Features
- Material Number: WNr. 1.4871
- Grade Designation: EV8
- Good strength retention at elevated temperatures
- Excellent oxidation and scaling resistance
- Suitable for thermal cycling applications
- Good weldability with appropriate procedures
- Reliable performance in heat-resistant applications
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| EN / DIN | 1.4871 |
| DIN Designation | EV8 |
| AFNOR | Z12CNT18-10 |
| BS | 321H Type |
| ISO | X12CrNiTi18-9 |
Sizes
- Diameter Range: 6 mm to 400 mm
- Length: 3 m, 6 m, or as per customer requirement
- Custom cut lengths available
EV8 Stainless Steel Chemical Composition
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.04 – 0.10 |
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 12.0 |
| Titanium (Ti) | ≥ 5 × C |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
UNS EV8 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength (0.2% Offset) | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 217 HB |
EV8 Physical Properties
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1400 – 1425°C |
| Thermal Conductivity | 16.0 W/m·K |
| Electrical Resistivity | 0.72 µΩ·m |
| Modulus of Elasticity | 193 GPa |
Types of EV8 Stainless Steel Round Bar
- Hot Rolled Round Bar
- Bright Round Bar
- Turned Round Bar
- Polished Round Bar
- Centerless Ground Round Bar
Applications
- Heat exchangers and superheaters
- Furnace components and thermal processing equipment
- High-temperature fasteners and shafts
- Petrochemical and refinery equipment
- Power generation and boiler components
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