SS 321 Plate Sheet Strip has excellent resistance to oxidation and carburization and can be used up to 900°C in continuous service. The titanium content in AISI 321 helps prevent the formation of chromium carbides and has excellent resistance to intergranular corrosion. TP321 performs well in oxidizing environments but is less suitable for reducing or chloride-rich environments than the molybdenum-containing grade 316. S32100 Stainless Steel is suitable for heat exchangers, furnace components and exhaust systems.
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SS 321 Plate Chemical Composition
- Chromium (Cr): 17.0–19.0%
- Nickel (Ni): 9.0–12.0%
- Titanium (Ti): ≥ 5 × (C + N), typically 0.20–0.70%
- Carbon (C): ≤ 0.08%
- Manganese (Mn): ≤ 2.0%
- Silicon (Si): ≤ 0.75%
- Phosphorus (P): ≤ 0.045%
- Sulfur (S): ≤ 0.03%
- Iron (Fe): Balance
Alloy 321 SS Plate Mechanical Properties
- Tensile Strength: ≥ 515 MPa
- Yield Strength: ≥ 205 MPa
- Elongation: ≥ 40%
- Hardness: ≤ 217 HBW
Weldability
Due to the titanium content, 321 stainless plate has excellent weldability. Compatible with standard welding methods such as TIG, MIG and SMAW.
Processing and Fabrication
- Hot forming is performed between 900-1200°C.
- Heat treatment: Solution annealing is performed at 1050°C followed by rapid cooling.
ASTM A240 Stainless Steel 321 plates Applications
- Aerospace and aviation
- Chemical and petrochemical processing
- Power generation
- Gas turbines
- Exhaust systems
- Marine turbines
