We supply Stainless Steel 321 and 321H Sheets and Plates in India and around the world. We create these sheets and plates using high-quality materials. We source these materials from trusted companies such as SAIL, Jindal, ESSAR, TATA, Bhushan, and some imported mills. This ensures quality, reliability, and consistency in every delivery.
With our modern facilities and skilled workers, we provide custom designs based on client needs and industry standards. Our products are known for their long-lasting durability, resistance to corrosion and oxidation, and strong mechanical strength. This makes them perfect for use in aerospace, chemical processing, refineries, thermal plants, power generation, and high-temperature applications.
Property | SS 321 (UNS S32100) | SS 321H (UNS S32109) |
Carbon Content | ≤ 0.08% | 0.04%–0.10% |
Titanium Stabilized | Yes (Ti = 5x(C+N)) | Yes (Ti = 4x(C+N)) |
Heat Resistance | Good | Excellent – Better suited for high-temp. |
Strength at Elevated Temps | Moderate | High – Preferred for pressure equipment |
Common Applications | Welding, aircraft, heat exchangers | Refineries, power plants, pressure vessels |
ASTM Specification | ASTM A240 | ASTM A240 |
321H is essentially the high carbon version of 321, offering enhanced creep resistance and strength at temperatures above 537°C. It is particularly used in structural and pressure-containing applications.
Specifications | ||||||
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STANDARD | UNS | WERKSTOFF NR. |
SS 321 | S32100 | 1.4541 |
SS 321H | S32109 | 1.4878 |
321H Chemical Composition | ||||||||||||||||||||||||||||||||||||||||||||||||
Typical compositional ranges for grade 321 stainless steels are given in table 1. | ||||||||||||||||||||||||||||||||||||||||||||||||
Composition ranges for 321 grade stainless steel Sheets & Plates | ||||||||||||||||||||||||||||||||||||||||||||||||
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Mechanical Properties | ||||||||||||||||||||||||||
Typical mechanical properties for grade 321 stainless steels are given in table 2. | ||||||||||||||||||||||||||
Mechanical properties of 321 grade stainless steel Plates & Sheeets | ||||||||||||||||||||||||||
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321H also has a requirement for a grain size of ASTM No 7 or coarser.
Physical Properties | |||||||||||||||||||||||||
Typical physical properties for annealed grade 321 stainless steels are given in table 3. | |||||||||||||||||||||||||
Physical properties of 321 grade stainless steel in the annealed condition | |||||||||||||||||||||||||
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Grade Specification Comparison | ||||||||||||||||||||||||||||||||||||
Approximate grade comparisons for 321 stainless steels are given in table 4. | ||||||||||||||||||||||||||||||||||||
Grade specifications for 321 grade stainless steel | ||||||||||||||||||||||||||||||||||||
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These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.
We ensure full traceability and customer confidence by including the following:
We follow safe and standard industry practices for packaging, including:
Grade | When to Use Instead of 321 |
304L | For intergranular corrosion resistance, not high temp. strength |
304H | For moderate temp. use up to 800°C |
310 / 310S | For higher temp. resistance up to 1100°C |
253MA (S30815) | For very high temp. resistance up to 1150°C |
347 | For similar corrosion resistance but with niobium stabilization |
Whether you’re based in India or shipping internationally, we’re here to make sourcing simple. We supply across the USA, Canada, Australia ,Germany, Brazil , and the United Kingdom. Fast quotes, custom sizes, and bulk orders available.
Let us know what you need—we’ll take care of the rest
| Flag | Country | Code |
|---|---|---|
| 🇮🇳 | India | IN |
| 🇺🇸 | United States | US |
| 🇬🇧 | United Kingdom | GB |
| 🇨🇳 | China | CN |
| 🇯🇵 | Japan | JP |
| 🇩🇪 | Germany | DE |
| 🇮🇹 | Italy | IT |
| 🇹🇷 | Turkey | TR |
| 🇦🇪 | United Arab Emirates | AE |
| 🇸🇦 | Saudi Arabia | SA |
| 🇶🇦 | Qatar | QA |
| 🇴🇲 | Oman | OM |
| 🇰🇼 | Kuwait | KW |
| 🇦🇺 | Australia | AU |
| 🇨🇦 | Canada | CA |
| 🇳🇱 | Netherlands | NL |
| 🇮🇩 | Indonesia | ID |
| 🇪🇬 | Egypt | EG |
