Stainless Steel 321 Plates
Welcome to ASC LLP, your trusted source for high-quality stainless steel products. Today, we delve into the world of 321 stainless steel plates, a material renowned for its superior qualities and versatile applications. Whether you’re an engineer, architect, or procurement manager, understanding the unique properties and advantages of stainless steel 321 plates can help you make informed decisions for your projects.
What is 321 Stainless Steel Plates?
SS 321 Plates are a type of austenitic stainless steel plate that is stabilized by titanium. This specific composition is designed to combat the adverse effects of chromium carbide precipitation, which can occur during exposure to temperatures between 800°F and 1500°F. The addition of titanium helps maintain the structural integrity of the plates, making them an ideal choice for high-temperature environments where other grades may fail.

Properties of 321 Stainless Steel Plates
- Corrosion Resistance: One of the standout properties of 321 stainless steel plates is their superior resistance to intergranular corrosion. This makes them ideal for applications where the material will be exposed to high temperatures for extended periods.
- Oxidation Resistance: These plates exhibit excellent resistance to oxidation, even at temperatures up to 900°C (1652°F). This makes them suitable for use in high-temperature environments.
- Durability: 321 stainless steel plates offer good overall durability, with resistance to stress and strain in both low and high-temperature applications.
- Weldability: The inclusion of titanium in the alloy significantly improves the weldability of 321 stainless steel plates, preventing carbide precipitation and ensuring robust weld joints.
- Mechanical Properties: These plates possess excellent mechanical properties, including high tensile and yield strength. They maintain their toughness and structural integrity under various conditions.
Advantages of 321 Stainless Steel Plates
Using SS 321 plates comes with numerous advantages, particularly for industries that operate in high-temperature environments. Here are some significant benefits:
- Enhanced Corrosion Resistance: The titanium content stabilizes the material, preventing the formation of chromium carbides at grain boundaries. This makes 321 stainless steel plates less susceptible to intergranular corrosion, a common issue in stainless steels.
- High-Temperature Performance: These plates retain their strength and resist oxidation even at high temperatures. This makes them suitable for applications like heat exchangers, aerospace parts, and high-temperature chemical processing equipment.
- Weldability and Formability: 321 stainless steel plates can be easily welded and formed into various shapes without the risk of cracking or losing their properties. This makes them versatile for a wide range of industrial applications.
- Durability in Extreme Conditions: With excellent toughness even at cryogenic temperatures, these plates are ideal for environments that experience extreme cold or rapid temperature fluctuations.
- Cost-Effective: While offering superior high-temperature performance, 321 stainless steel plates are cost-effective compared to other high-performance alloys.


Schedule and Size Chart
Thickness (mm) | Width (mm) | Length (mm) |
1.0 – 6.0 | 1000 – 2000 | 2000 – 6000 |
6.0 – 12.0 | 1000 – 2500 | 2000 – 6000 |
12.0 – 25.0 | 1000 – 3000 | 2000 – 6000 |
25.0 – 50.0 | 1000 – 3000 | 2000 – 6000 |
50.0 – 100.0 | 1000 – 3000 | 2000 – 6000 |
Mechanical Properties Chart
Property | Value |
Tensile Strength (MPa) | 515 – 750 |
Yield Strength (0.2% offset) (MPa) | 205 – 310 |
Elongation (% in 50mm) | 40 – 45 |
Hardness (Brinell) | 217 max |
Modulus of Elasticity (GPa) | 200 |
Impact Toughness (Charpy V-notch) (J) | 120 at -50°C |
Specifications Chart
Standard | Specification |
ASTM | A240 |
ASME | SA240 |
EN | 1.4541 |
JIS | SUS 321 |
UNS | S32100 |
AMS | 5510 |
Chemical Composition Chart
Element | Percentage (%) |
Carbon (C) | 0.08 max |
Manganese (Mn) | 2.00 max |
Silicon (Si) | 0.75 max |
Phosphorus (P) | 0.045 max |
Sulfur (S) | 0.030 max |
Chromium (Cr) | 17.0 – 19.0 |
Nickel (Ni) | 9.0 – 12.0 |
Titanium (Ti) | 5(C+N) min – 0.70 max |
Iron (Fe) | Balance |
Physical Properties Chart
Property | Value |
Density (g/cm³) | 7.9 |
Melting Point (°C) | 1400 – 1425 |
Thermal Conductivity (W/m·K) | 16.0 at 100°C |
Specific Heat (J/kg·K) | 500 |
Electrical Resistivity (μΩ·m) | 0.74 at 20°C |
Coefficient of Thermal Expansion (µm/m·°C) | 16.0 at 20-100°C |
Applications Chart
Industry | Application |
Aerospace | Aircraft exhaust manifolds, engine parts |
Chemical Processing | Heat exchangers, chemical tanks |
Petroleum Refining | Refinery equipment, catalytic recovery systems |
Thermal Processing | Furnace components, heat treatment fixtures |
Power Generation | Boiler casings, superheater tubes |
Food Processing | Food preparation and storage equipment |
Pharmaceutical | Pharmaceutical processing equipment |
Automotive | Exhaust systems, emission control devices |
Why Choose ASC LLP?
At ASC LLP, we pride ourselves on being a leading supplier of high-quality stainless steel products. Our SS 321 plates are sourced from trusted manufacturers and rigorously tested to ensure they meet the highest industry standards. Here’s why you should choose us:
- Quality Assurance: We ensure that all our products meet international quality standards and undergo stringent testing to guarantee their performance and durability.
- Competitive Pricing: We offer competitive prices without compromising on the quality of our stainless steel plates.
- Expertise and Experience: With years of experience in the industry, our team of experts can provide you with the best advice and solutions for your specific requirements.
- Customer Service: We are committed to providing exceptional customer service, from the initial inquiry to the delivery of your order. Our team is always available to assist you with any questions or concerns.
- Wide Range of Products: In addition to 321 stainless steel plates, we offer a wide range of stainless steel products to meet your needs, including other grades of stainless steel plates, pipes, tubes, and fittings.
SS 321 plates offer a unique combination of properties that make them ideal for high-temperature and corrosive environments. Their enhanced corrosion resistance, high-temperature performance, excellent weldability and formability, and durability in extreme conditions make them a preferred choice for various industrial applications. At ASC LLP, we provide high-quality 321 stainless steel plates that meet international standards, ensuring you receive the best products for your specific needs. Contact us today to learn more about our products and how we can assist you with your stainless steel requirements.
Global Reach
Amardeep Steel Centre boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality stainless steel 321 plates. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.

Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.