SS AISI 321 H / UNS S32109 / 1.4878 supplier, contact us to get free quote and sample!
Stainless steel is a type of steel which is resistant to corrosion, rust and staining. It is an alloy made up of iron, carbon, and a variety of other elements. SS AISI 321 H / UNS S32109 / 1.4878 is a type of stainless steel that is specifically designed for high temperature applications. Stainless steel 1.4878 is known for its superior properties including high tensile strength, good corrosion resistance, and excellent thermal stability.
Material Properties of SS 321H (1.4878):
1. SS 321H Chemical Composition (Percentage by Weight):
Carbon (C): 0.04–0.10
Manganese (Mn): 2.00 max
Phosphorus (P): 0.045 max
Sulfur (S): 0.030 max
Silicon (Si): 0.75 max
Chromium (Cr): 17.0–19.0
Nickel (Ni): 9.0–12.0
Titanium (Ti): 5xC min, 0.70 max
2. ASTM A240 AISI 321H Stainless Steel Mechanical Properties:
- Tensile Strength: 75,000 psi (515 MPa) minimum
- Yield Strength (0.2% Offset): 30,000 psi (205 MPa) minimum
- Elongation: 40% minimum
- Hardness (Brinell): 217 maximum
3. ASTM A312 TP321H Pipe Physical Properties:
- Density: 0.289 lb/in³ (7.99 g/cm³)
- Melting Range: 2500–2590°F (1371–1421°C)
- Specific Heat Capacity: 0.12 BTU/lb-°F (502 J/kg-K) at 32–212°F (0–100°C)
4. ASTM A213 TP321H Tubing Thermal Properties:
- Thermal Conductivity: 14.6 BTU/hr-ft-°F (25.2 W/m-K) at 68°F (20°C)
- Coefficient of Thermal Expansion: 16.5 x 10^-6 in/in/°F (9.2 x 10^-6 m/m/°C) from 32 to 1000°F (0 to 538°C)
5. 321H Material Corrosion Resistance:
1.4878 (AISI 321H) exhibits excellent corrosion resistance, particularly in environments containing acidic or chloride-containing media. EN 1.4878 stainless steel is well-suited for applications in chemical processing, petrochemical, and other corrosive environments.
6. ASTM A249 UNS S32109 High-Temperature Performance:
SS 321H is designed for elevated-temperature service and maintains its mechanical properties at temperatures up to 1500°F (816°C). The thermal conductivity of alloy 321H is excellent, with a thermal conductivity of around 16 W/m-K at 100°C. This makes stainless steel 1.4878 suitable for applications in heat exchangers, annealing equipment, and other high-temperature environments.
7. 1.4878 steel Weldability:
ASTM A213 TP321H Stainless Tube offers good weldability and can be easily welded using standard processes. The titanium content helps prevent sensitization during welding, ensuring corrosion resistance in the heat-affected zone.
