Chung Metal supplies top-notch Stainless Steel 347H Hex Bars, which are a high-carbon version of SS 347 for enhanced creep strength at high temperatures. The stabilized stainless steel resists corrosion in intergranular areas and is ideal for parts which contain pressure and are exposed to thermal stress. The hex bar profile provides a perfect fit to handle the structure and torque transference applications. SS 347H is a material of choice in boiler tubes, superheater parts, and high-temperature welded structures. Chung Metal carefully ensures that every 347H hex bar has strict dimensional and metallurgical requirements for long-term strength and heat resistance in industrial use.
SS 347H contains 17–19% chromium, 9–13% nickel, and more carbon (0.04–0.10%) than 347. Niobium is used for stabilization against carbide precipitation. Tensile strength is 550–750 MPa, yield strength approximately 200–300 MPa, with elongation of 30–40%. The material is non-magnetic and oxidation-resistant up to 900°C. The hex bar configuration assists in mechanical torque applications and secure fitting assemblies. Chung Metal supplies 347H hex bars in diameters and conditions suited for pressure, temperature, and corrosion resistance.
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.
347H hex bars are applied in assemblies welded at high temperatures, heat exchanger tubing, high-pressure boilers, petrochemical pipelines, and power plant structures. Their strong creep strength makes them ideal for long-term service under high temperatures, especially where welding conditions exist. The hex profile is ideal for torque-based fastening in engineered equipment, flanged connections, and mechanical connectors. 347H hex bars find common applications in aerospace, energy, and chemical sectors. Chung Metal provides 347H hex bars of uniform quality for service where resistance to stress rupture, oxidation, and thermal distortion is necessary.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Chung Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Da Nang, Vietnam
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