ASTM A182 F321H
ASTM A182 F321H Stainless Steel Flange
Emirerri Steel supplies premium ASTM A182 F321H Stainless Steel Forged Products, including flanges, fittings, and bars.
F321H is a stabilized austenitic stainless steel containing titanium, which provides excellent resistance to intergranular corrosion in high-temperature environments. It is ideal for applications requiring superior heat resistance, oxidation resistance, and mechanical stability at elevated temperatures.
This grade is commonly used in chemical processing, power generation, and furnace equipment where long-term durability under high heat is essential.
Key Features
Titanium-Stabilized: Prevents carbide precipitation and intergranular corrosion.
Excellent High-Temperature Strength for continuous service.
Outstanding Oxidation and Scaling Resistance at elevated temperatures.
Good Corrosion Resistance in oxidizing and mildly reducing environments.
Superior Weldability and Fabrication without loss of corrosion resistance.
Good Ductility and Toughness even after prolonged heat exposure.
Type of Flanges
Specification
| Standard | Details |
|---|---|
| Product Standard | ASTM A182 / ASME SA182 |
| Grade | F321H |
| UNS Number | S32109 |
| Material Type | Austenitic Stainless Steel (Titanium Stabilized) |
| Manufacturing Process | Forged / Rolled / Heat Treated |
| Delivery Condition | Solution Annealed |
| Form | Round Bars, Forged Bars, Flanges, Fittings |
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | S32109 |
| EN / DIN | X6CrNiTi18-10 / 1.4878 |
| BS | 321H24 |
| JIS | SUS 321H |
| AFNOR | Z6CN18-10T |
Available Sizes
| Form | Size Range |
|---|---|
| Round Bar | 10mm to 350mm Diameter |
| Flanges | ½” to 48” (Class 150 – 2500) |
| Forged Fittings | ½” to 4” (Socket Weld / Threaded) |
| Length | 1000mm to 6000mm (Custom Cut Available) |
ASTM A182 F321H Chemical Composition
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.04 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 17.00 – 19.00 |
| Nickel (Ni) | 9.00 – 12.00 |
| Titanium (Ti) | ≥ 5×C, typically 0.70 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.03 max |
| Nitrogen (N) | 0.10 max |
| Iron (Fe) | Balance |
ASTM A182 F321H Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 515 min |
| Yield Strength (MPa) | 205 min |
| Elongation (%) | 40 min |
| Hardness (Brinell) | 217 max |
| Modulus of Elasticity (GPa) | 200 |
ASTM A182 F321H Physical Properties
| Property | Value |
|---|---|
| Density | 7.9 g/cm³ |
| Melting Point | 1400 – 1450°C |
| Thermal Conductivity (at 100°C) | 16 W/m·K |
| Electrical Resistivity (20°C) | 0.75 µΩ·m |
| Coefficient of Expansion (20–100°C) | 16.0 µm/m·°C |
Types of ASTM A182 F321H Products
F321H Forged Round Bars
F321H Flanges (WNRF, SORF, Blind, Lap Joint)
F321H Forged Fittings (Elbow, Tee, Coupling, Union)
F321H Socket Weld Fittings
F321H Threaded Fittings
F321H Pipe Nipples and Outlet Fittings
Custom Machined Components
Corrosion Resistance
F321H exhibits excellent resistance to intergranular corrosion due to titanium stabilization. It also performs well in oxidizing environments and retains corrosion resistance in welded structures, making it ideal for high-temperature service in chemical and industrial applications.
Heat Resistance
Continuous Service: Up to 870°C (1600°F)
Intermittent Service: Up to 925°C (1700°F)
Excellent resistance to oxidation and scaling in high-temperature applications, including furnace components and heat exchangers.
Heat Treatment
Solution Annealing: 1010–1120°C followed by rapid water or air quenching.
Restores corrosion resistance and mechanical properties after fabrication or welding.
Stabilization with titanium ensures minimal carbide precipitation, even in high-temperature service.
Welding
F321H can be welded using TIG, MIG, and SMAW techniques. Filler metals such as ER321 are recommended. Titanium stabilization minimizes carbide precipitation, ensuring welded joints maintain high corrosion resistance.
Fabrication
Can be hot worked at 950–1200°C and cold worked with higher force due to austenitic structure.
Solution annealing is recommended after fabrication to restore maximum corrosion resistance.
Easily machined and formed into complex components without loss of mechanical properties.
Applications
Furnace Components, Retorts, and Heat Treatment Equipment
Chemical & Petrochemical Processing Units
Boilers, Heat Exchangers, and Pressure Vessels
Aerospace Components and Gas Turbine Parts
Marine and Offshore High-Temperature Equipment
Laboratory and Industrial Reaction Vessels
Pulp & Paper Industry Heat Resistant Components