Neil Metals is a trusted manufacturer and supplier of Stainless Steel 347H Square Bars and Rods, located in Kolkata, India. They specialize in high-temperature, corrosion-resistant stainless steel products that are essential for critical industrial applications. SS 347H is the high-carbon variant of SS 347, specifically engineered to enhance creep strength and durability in high-temperature environments. Neil Metals takes pride in producing these square bars with precision and quality, fully compliant with international standards. They cater to various sectors, including chemical processing, petrochemicals, heat exchangers, and power generation, ensuring consistent performance, precise dimensions, and timely deliveries both domestically and internationally.
The composition of Stainless Steel 347H Square Bars and Rods includes 17–20% chromium, 9–13% nickel, and a higher carbon content (0.04–0.10%) compared to SS 347, with columbium (niobium) added for stabilization. This unique blend boosts resistance to intergranular corrosion and enhances strength and creep resistance at elevated temperatures. SS 347H boasts a tensile strength of about 515 MPa and a yield strength of roughly 205 MPa. It remains structurally stable and resistant to oxidation at temperatures reaching up to 870°C, while also offering good weldability and mechanical durability under thermal stress.
Dimensions : ASTM, ASME
Standard : ASTM / ASME SA A582, A276, A564, ASTM A484, 484M
Surface : hrap, hot rolled pickled or sand blasting finished, cold drawn, polished, hairline
Size : Tolerance: H8, H9, H10, H11, H12, H13K9, K10, K11, K12
| Element | C | Cr | Mn | Ni | P | S | Si |
| SS 347H | 0.04 – 0.10 | 17.0 – 19.0 | 2.00 max. | 9.0-12.0 | 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 |
| STANDARD | WERKSTOFF NR. | UNS |
| SS 347H | 1.4550 | S34709 |
| SQUARES | ||
|---|---|---|
| Size(mm) | WT PER FEET IN KGS | WT PER MTR IN KGS |
| 16 | 0.62 | 2.05 |
| 18 | 0.79 | 2.59 |
| 20 | 0.76 | 2.49 |
| 22 | 1.18 | 3.87 |
| 25 | 1.52 | 5.00 |
| 28 | 1.91 | 6.27 |
| 30 | 2.19 | 7.20 |
| 32 | 2.50 | 8.19 |
| 36 | 3.16 | 10.37 |
| 38 | 3.52 | 11.55 |
| 40 | 3.90 | 12.80 |
| 45 | 4.94 | 16.20 |
| 50 | 6.10 | 20.00 |
| 56 | 7.65 | 25.08 |
| 60 | – | – |
| 65 | – | – |
| 70 | – | – |
| 75 | – | – |
| 80 | – | – |
| 90 | – | – |
| 100 | – | – |
Stainless Steel 347H Square Bars offer excellent high-temperature strength, resistance to intergranular corrosion, and superior weldability. They are ideal for applications in extreme environments, such as chemical processing and heat exchangers.
Yes, Stainless Steel 347H Square Bars are fully recyclable and retain their properties after recycling. This makes them an environmentally sustainable choice for various applications.
No, Stainless Steel 347H Square Bars are generally non-magnetic in their annealed condition. However, slight magnetism may develop after cold working.
These Stainless Steel 347H Square Bars and Rods are perfect for demanding applications that require high resistance to temperatures, thermal fatigue, and corrosion. They are commonly used in boiler tubes, superheaters, pressure vessels, heat exchangers, and various components in petroleum refineries and chemical plants. The square shape provides excellent stability, making them ideal for structural supports, frameworks, and precision-machined parts. SS 347H is particularly well-suited for welded structures operating in high-heat environments, ensuring a long service life and reliability. Its high-carbon formulation and stabilization make it a top choice for high-stress, high-temperature industrial conditions.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Neil Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Kolkata, India
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