Semih Metals is a leading manufacturer and supplier based in Istanbul, Turkey, and is known for producing high-quality stainless steel products. We at Semih Metals believe in excellence and provide a wide range of materials, including Stainless Steel 321H Rectangular Bars. Known for their superior strength, excellent corrosion resistance and high-temperature stability, our bars are ideal for industries requiring reliable and durable solutions. At Semih Metals, we guarantee timely delivery and excellent customer service, thus making us a favorite among all our customers, irrespective of their sectors. We focus on quality and customer satisfaction, which gives us an edge in the market.
Stainless Steel 321H rectangular bars are an alloy of iron, with additions of chromium from 17% to 19% and nickel from 9% to 12%, together with small proportions of titanium. This composition makes it resistant to corrosion, especially against intergranular corrosion. High tensile strength is up to 515-700 MPa, good yield strength is 205 MPa, and resistance against oxidation at high temperatures is very good. Advantages include superior strength, excellent corrosion resistance, high-temperature stability, and weldability, all making them appropriate for applications involving chemical processing, aerospace, or environments of extreme heat.
Standard : 321H / 1.4878
Range : 3.17mm to 350mm dia
Designation : ASTM A276, ASME SA276
Finish : Bright, Black, Polish
Thickness: 4.0mm – 100mm
Type: Bright Bar, Black Bars, Hex Bar, Square Bar, Rods, Polish Bar, Forged Bar, Round Bar
Length : Random, Fix & Cut Length
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Ti |
| 321H | 0.04 – 0.10 | 2 max | 0.75 max | 0.045 max | 0.03 max | 17 – 19 | 3 – 4 | 9 – 12 | – | 4xC min 0.60% max |
| Density | 8.0 g/cm3 |
| Melting Point | 1454 °C (2650 °F) |
| Tensile Strength | Psi – 75000 , MPa – 515 |
| Yield Strength (0.2%Offset) | Psi – 30000, MPa – 205 |
| Elongation | 35 % |
| Standard | SS 321H |
| UNS | S32109 |
| WERKSTOFF NR. / DIN | 1.4878 |
Choose Stainless Steel 321H Rectangular Bars based on their excellent high-temperature resistance and resistance to carbide precipitation in welding applications. Consider mechanical strength, corrosion resistance, and desired thermal stability for specific use cases.
Stainless Steel 321H Rectangular Bars generally do not require corrosion protection coatings due to their inherent corrosion resistance. However, coatings can be applied for enhanced protection in aggressive environments or specific applications.
Yes, Stainless Steel 321H Rectangular Bars can be welded, offering excellent weldability. However, using appropriate filler materials and controlling heat input is essential to prevent carbide precipitation and maintain corrosion resistance.
Stainless Steel 321H Rectangular Bars are widely used in industries requiring high temperature and corrosion resistance. They are ideal for applications in chemical processing, petrochemical, aerospace and power generation, particularly for components exposed to elevated temperatures. Common uses include heat exchangers, furnace parts, reactor cores and exhaust systems. Their excellent resistance to oxidation and intergranular corrosion makes them suitable for high-stress environments such as welding and their strength and durability are crucial in critical structural applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Semih Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Istanbul, Turkey
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