When industries demand a stainless steel grade that offers superior heat resistance, excellent strength, and reliable performance, Stainless Steel 321 Grade Sheet becomes a preferred choice. Engineered with titanium stabilization, SS 321 sheets are widely used in aerospace, petrochemical, automotive, and power generation industries.
This blog will cover everything you need to know about Stainless Steel 321 Grade Sheets, including thickness, available sizes, tolerance limits, composition, and key applications.
Stainless Steel 321 is an austenitic stainless steel alloy stabilized with titanium. This stabilization prevents carbide precipitation during welding and ensures excellent resistance to intergranular corrosion.
Unlike SS 304, Stainless Steel 321 performs better in high-temperature environments (up to 870°C continuous exposure).
In simple terms, SS 321 sheets are heat-resistant, weldable, and durable materials used where long-term performance is crucial.
| Element | Percentage (%) |
|---|---|
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 12.0 |
| Titanium (Ti) | ≥ 0.70 |
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.03 |
| Iron (Fe) | Balance |
Why this matters:
SS 321 Grade Sheets are available in a wide range of thicknesses and dimensions to suit different industrial requirements.
Standard Thickness Range:
Common Sizes Available:
Thinner sheets are used in automotive and aerospace applications, while thicker plates are used in boilers, pressure vessels, and heat exchangers.
Tolerance refers to the permissible deviation in sheet thickness, width, and flatness as per international standards.
These tolerances ensure that the SS 321 grade sheet fits precisely into fabrication and assembly requirements without the need for excess machining.
Stainless Steel 321 Grade Sheets are widely used in:
Stainless Steel 321 Grade Sheets are a high-performance material trusted for their strength, corrosion resistance, and precision tolerances. With a wide range of thicknesses and sizes, these sheets serve industries that demand reliability under extreme conditions, from aerospace and automotive to petrochemical and power generation.
At Riyaarth Overseas, we provide premium-quality Stainless Steel 321 Grade Sheets manufactured to global standards. Our products come in various sizes, thicknesses, and tolerances, ensuring you get the right material for your specific application. Contact us today for bulk or customized orders.
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