Common size on stock, Special sizes needs new production.Can cut to Size, cut to Shape.
EMERSONMETAL
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321 stainless steel plate is a versatile and reliable material, particularly valued for its high-temperature resistance and intergranular corrosion resistance. The addition of titanium helps stabilize the alloy composition and prevents chromium carbie precipitation during welding, significantly enhancing its corrosion resistance, especially in high-temperature environments.
Consequently, 321 stainless steel plate is highly suitable for heat-resistant and corrosion-resistant applications. For instance, in heat exchanger manufacturing, it maintains structural integrity and resists oxidation even when exposed to temperatures up to 900°C. Similarly, within exhaust systems, it withstands high temperatures and common corrosive gases.
Furthermore, its excellent formability and weldability simplify manufacturing processes, making it a practical choice for complex designs and assemblies in chemical equipment where durability and reliability are paramount.
Overall, 321 stainless steel plate serves as a reliable material across diverse industrial applications, achieving a balance between performance and workability in demanding environments.
| Product Name | Customized Support Cutting Welding 321 Stainless Steel Plate Sheet |
| Surface Treatment | Pickled Surface/2B/BA/No.4/HL/8K |
| Grade | 321 |
| Technique | Hot Rolled or Cold Rolled |
| Steel Grade Stocking | 201,301,304,304L,310S,316L,321,430,440,904L,401,410S,409L.2205,2207 and other grades. |
| Heat Treatment | Solution Annealing: 950-1120°C, rapid cooling to achieve optimum corrosion resistance; Stabilization Annealing: 850-900°C, air cooling, for welded components or parts subjected to prolonged service at 550-850°C. |
| Shape | Flat,Coil,Strip |
| Width | 60-2000mm |
| Thickness | 0.3-20mm |
| Length | Cut to Length |
| Processing | Laser Cutting ; Waterjet Cutting; Stamping, Bending, Welding. |
| Brand | TianJin Emerson |
| Delivery Time | 3days for Stock |
| Application | Petroleum exhaust combustion pipes, engine exhaust manifolds, turbocharger housings,Boiler shells, heat exchangers, furnace radiation tubes,chemical PTA oxidation reactor linings, acetic acid evaporators. |
Standard | C % max | Si max | Mn max | P max | S max | tensile strength（MPa） | yield strength（MPa） | Elongation% |
321 | 0.08 | 1 | 2 | 0.045 | 0.03 | ≥520 | ≥205 | ≥40 |
The titanium stabilization in the chemical composition of 321 stainless steel prevents chromium carbide precipitation at grain boundaries, maintaining a minimum tensile strength (σb) of ≥520 MPa even at temperatures between 500-900°C. Its oxidation weight gain is only one-third that of 304 stainless steel, endowing it with high-temperature strength and outstanding oxidation resistance.
Outstanding resistance to intergranular corrosion, capable of withstanding subsequent corrosive media immediately after welding without requiring annealing.
Excellent weldability and thermal cycling stability, suitable for all-position fusion welding, ideal for thermal fatigue components such as expansion joints and combustion chambers.
Elongation ≥40%, hardness ≤200HV, exhibits no cracking during deep drawing, rolling, or spinning, with excellent forming and machining properties. Capable of producing complex shapes such as ultra-thin-walled seamless tubes and corrugated tubes.
Petroleum exhaust combustion pipes, engine exhaust manifolds, turbocharger housings: Utilizing 900°C oxidation resistance and thermal fatigue resistance
Boiler shells, heat exchangers, furnace radiation tubes: Maintain strength and dimensional stability at sustained temperatures of 700-850°C
Aviation afterburner insulation panels, bellows compensators: Resist intergranular corrosion without post-weld heat treatment
Chemical PTA oxidation reactor linings, acetic acid evaporators: Resist intergranular corrosion from organic acids + chloride ions
Our factory can use 20000V laser cutting machines, bending machines, welding machines, punching machines, etc. to process stainless steel plates of various thicknesses.
Q: What is the fundamental difference between 321 and 304?
A: Both have similar base compositions, but 321 contains additional titanium, enabling it to maintain resistance to intergranular corrosion after welding or exposure to high temperatures.
Q:321 What is the maximum temperature resistance of stainless steel plates?
A: The upper limit for intermittent use is approximately 900°C, while continuous use can reach up to 925°C.
Q: Is heat treatment required after welding?
A: Generally not. Since titanium is carbon-stabilized, the weld and heat-affected zone retain corrosion resistance even without solution annealing post-weld.
Q: Can it be used at low temperatures?
A: Yes. Grade 321 maintains its austenitic structure at low temperatures and exhibits excellent impact toughness. It is suitable for polar or cryogenic storage and transportation equipment, addressing the intergranular corrosion risk associated with 304L at low temperatures.
Q: Can it replace 316L?
A: Only in “high-temperature + mildly corrosive” environments. If chloride ions or reducing acids are present, choose Mo-containing 316L. 321 does not offer superior pitting resistance.
