Semih Metals is a leading manufacturer, distributor, and supplier of SS 347 Hex Bars and rods, known for their exceptional corrosion resistance, which is comparable to that of SS 302 Hex Bars. Our SS 347 Hex Bars are made from columbium-stabilized austenitic steel, providing excellent performance in oxidizing environments. These bars are highly resistant to intergranular corrosion, even after exposure to temperatures in the chromium carbide precipitation range of 800°F to 1500°F (427°C to 816°C). With added columbium, SS 347 Hex Bars offer superior resistance to chromium carbide formation, making them a reliable choice for harsh and high-temperature applications. Their enhanced durability and corrosion resistance ensure long-lasting performance in aggressive conditions, making SS 347 Hex Bars an ideal material for demanding environments.
SS 347H Hex Bars are made from an austenitic stainless steel alloy containing primarily iron, chromium (17-19%), nickel (9-12%), and columbium (0.4-1.0%). The higher carbon content in SS 347H (0.04-0.10%) enhances its high-temperature strength. This composition provides excellent resistance to intergranular corrosion and chromium carbide formation. The mechanical properties include a tensile strength of 75-95 ksi (515-655 MPa), yield strength of 30-60 ksi (205-415 MPa), and elongation of 40-50%. These bars are highly durable and perform well in harsh, high-temperature environments.
Dimensions : ASTM, ASME
Standard : ASTM / ASME SA A276, A479, ASTM A493
Length : Random, Fix & Cut Length
Size : 20MM to 150MM
| Element | C | Cr | Mn | Ni | P | S | Si |
| SS 347h | 0.08 max. | 17.0 – 19.0 | 2.00 max. | 9.0-13.0 | 0.045 max. | 0.03 max. | 0.75 max |
| Element | Density | Melting Range,℃ | Tensile Strength | Yield Strength | Elongation | Hardness (Brinell) |
| SS 347h | 7.96 | 1450 ℃ | 515 | 205 | 40 | 201 |
| HEXAGONS | ||
|---|---|---|
| Size(mm) | WT PER FEET IN KGS | WT PER MTR IN KGS |
| 16 | 0.55 | 1.79 |
| 18 | 0.69 | 2.27 |
| 20 | 0.85 | 2.80 |
| 22 | 1.03 | 3.39 |
| 25 | 1.33 | 4.38 |
| 28 | 1.67 | 5.49 |
| 30 | 1.92 | 6.30 |
| 32 | 2.19 | 7.17 |
| 36 | 2.77 | 9.07 |
| 38 | 3.08 | 10.11 |
| 40 | 3.41 | 11.20 |
| 45 | 4.32 | 14.18 |
| 50 | 5.34 | 17.50 |
| 56 | – | – |
| 60 | – | – |
| 65 | – | – |
| 70 | – | – |
| 75 | – | – |
| 80 | – | – |
| 90 | – | – |
| 100 | – | – |
SS 347H stainless steel contains high carbon content (0.04–0.10%), along with chromium (17–19%) and nickel (9–12%), which enhance its resistance to high temperatures and intergranular corrosion. Its stabilizing addition of tantalum or niobium prevents carbide precipitation, making it ideal for high-stress applications like hexagonal bars.
The high carbon content in SS 347H enhances its high-temperature strength and resistance to creep, making it suitable for extreme heat environments. Unlike lower-carbon steels, it stabilizes its microstructure, preventing carbide precipitation and improving oxidation resistance, which is crucial for high-temperature applications compared to other stainless steels like 304 or 316.
SS 347H Hex Bar is commonly used in the aerospace, chemical processing, and power generation industries. It is preferred for its excellent high-temperature resistance, resistance to intergranular corrosion, and stability in harsh environments. Its ability to withstand extreme temperatures and prevent carbide precipitation makes it ideal for critical applications.
SS 347H Hex Bars are widely used in high-temperature applications due to their excellent resistance to intergranular corrosion and chromium carbide formation. Common uses include components in chemical processing, power plants, and heat exchangers, as well as in welded equipment, furnace parts, and exhaust systems. Their ability to withstand temperatures up to 1500°F (816°C) makes them ideal for use in industries like petrochemical, aerospace, and automotive. SS 347H Hex Bars are also employed in applications requiring resistance to oxidation and corrosion in aggressive environments.
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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