321 Stainless Steel

AISI 321 Stainless Steel

Overview: 321 Stainless Steel

SS321 stainless steel is an austenitic Ni-Cr-Ti alloy noted for its excellent wear resistance, high-temperature strength, and creep resistance. This grade showcases superior durability in both organic and inorganic acids across varying concentrations and temperatures, particularly in oxidizing environments. With better high-temperature resistance than 316L, SS321 closely resembles 304 stainless steel in performance. The addition of titanium as a stabilizing element enhances its high-temperature capabilities and intergranular corrosion resistance, effectively controlling chromium carbide formation.

SS321 also excels in high-temperature stress rupture behavior and creep resistance, making it ideal for welding components intended for high-temperature service. Its stress mechanical properties surpass those of 304 stainless steel, further establishing its utility in demanding thermal conditions.

What Is 321 Stainless Steel

321 Stainless Steel Features

The SS321 stainless steel is renowned for its robustness and versatility across numerous applications. Unlike other stainless steel variants, 321 steel does not harden via heat treatment but instead strengthens through cold working. It features excellent weldability without the need for post-weld annealing and offers remarkable ductility, which facilitates easy forming.

AISI 321 is particularly noted for its superior corrosion resistance to dilute organic acids, although it is susceptible to pitting and crevice corrosion in chloride-rich environments. Machining SS321 requires careful consideration due to its propensity to work harden, a characteristic influenced by its titanium addition. For successful machining, using well-maintained, rigid, and powerful equipment is recommended to reduce vibration, coupled with high-quality lubricants to keep tools sharp and prevent excessive work hardening, thus ensuring smooth machining processes.

This stainless steel grade is highly favored in sectors that demand high temperature resistance and dependable welding qualities, but it necessitates precise machining practices to preserve its structural integrity and performance.

  • Components and lining for acid-resistant containers and equipment;
  • Exhaust systems for burning petroleum waste gases;
  • Exhaust tubing for engines;
  • Shells for boilers, heat exchangers, and furnace parts;
  • Diesel engine silencers;
  • Boiler pressure containers;
  • Vehicles for transporting chemicals;
  • Compensators for thermal expansion;
  • Spiral welded tubes for furnaces and drying equipment;
  • Aviation components;
  • Various other applications.

321 Stainless Steel Application

321 Stainless Steel Tags

AISI 321, SUS 321, UNS S32100, Acero 321, Inox 321, 1.4541, Type 321, Grade 321

321 Stainless Steel Technical Sheet

SUS 321

321 Stainless Steel Chemical Compositions Sheet

Grade Standard C Si Mn P S Cr Ni Ti N

321 Stainless Steel Properties Sheet

Grade AISI/ASTM Yield Strength Rp0.2(N/mm²) Tensile Strength Rm(N/mm²) Elongation(%) Hardness HRB

Why Purchase 321 Stainless Steel from GHT

Reliable Stainless Steel Coil Inventory Assurance

Ever been in a bind due to an urgent need for substantial quantities of stainless steel coils, only to find your supplier’s inventory lacking? Such situations can disrupt your workflow and plans.

Our Advantage: With us, that scenario is a thing of the past.  Our inventory is consistently stocked to the brim, ensuring rapid fulfillment of even the largest orders, seamlessly aligning with your business timeline.

Tailored Stainless Steel Material Processing

You might have encountered situations where custom processing is needed, but finding the right supplier to meet your specific demands can be a challenge.

Our Advantage: Our robust processing capabilities are designed to cater to all your customization needs. Be it dimension adjustments, stainless steel finish surface treatments, or other specific requirements, we offer professional one-stop services.

Competitive Stainless Steel Pricing

When searching for stainless steel coil suppliers, pricing is often a key consideration. You might have had to compromise on your ideal supplier due to high costs.

Our Advantage: Through effective cost control and optimized procurement processes, we ensure competitive pricing. This means choosing us not only gets you high-quality products but also services that offer great value for money.

Varied Inventory Stainless Steel Coil Specifications

The quest for stainless steel coils with precise specifications can often lead to dead ends. Finding a supplier who understands and meets these unique requirements is crucial.

Our Advantage: Our inventory is a testament to diversity, encompassing a variety of materials, thicknesses, and widths. We pride ourselves on being able to meet your specific project needs with pinpoint accuracy.

Precision Stainless Steel Shearing Services

Accurate shearing is crucial for the use of stainless steel coils, but not all suppliers can offer such precision services.

Our Advantage: Our shearing services are both professional and efficient, ensuring precise cuts as per your requirements, guaranteeing that the products meet your exact specifications.”

Looking For 321 Stainless Steel Supplier

Send us a message to discuss your 321 stainless steel needs. We always reply within 24 hours.

How To Pack 321 Stainless Steel Sheet & Coil

In GHT, all of our stainless steel coils are packaged as per international standard to prevent any possible damage or loss. By default, for quantity less than 1 whole compete coil (our MOQ is 5 tons), we will use woven plastic bag to cover SS coils and then fix them upon wooden pallet for further protection. We can also package the SS coils as per your special requirement, though this can incur extra cost.

In GHT, all of our stainless steel sheets are packaged as per international standard to prevent any possible damage or loss. By default, we will use brown paper to cover SS sheets and then bundle them together onto wooden pallets. At times, upon some customers’ requests, we will also apply reinforced package with extra metal straps fixed on the four corners, though this can incur extra cost. For enhanced customer experience, we also accept customized package as per your requests.

321 Stainless Steel FAQs

Yes, we customize SS321 to meet specific requirements in terms of thickness, width, finish and other properties.

For trial orders, expect quick delivery within a week. Regular orders typically take between 7 to 30 days.

We ensure the highest quality of our 321 steel products through stringent inspections during manufacturing, cutting, and packaging. A mill test certificate for 321 steel is also provided.

We offer a free SS321 steel sample for quality verification; you only cover the shipping cost.

Advantages of 304 Stainless Steel:
Excellent general corrosion resistance.
Superior weldability and formability.
Suitable for a wide range of applications including food processing and construction.

Disadvantages of 304 Stainless Steel:
Limited high-temperature resistance.
Susceptibility to intergranular corrosion when heated above 800°C.

Advantages of 321 Stainless Steel:
Exceptional high-temperature resistance ideal for high-temperature chemical processes.
Enhanced weldability and minimal intergranular corrosion post-welding due to titanium stabilization.

Disadvantages of 321 Stainless Steel:
Higher cost compared to 304, reflecting specialized properties.
In some general applications, its corrosion resistance might be less optimal compared to 304.

When selecting a supplier for SS321, research their reputation, compare quotes, assess credibility through certifications and customer feedback, and verify their quality assurance measures. Negotiate terms that meet your needs and ensure all financial agreements and shipping arrangements are clear and documented. Upon receiving, inspect the coils for quality and accuracy.

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Want To Purchase 321 Stainless Steel?


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