Harsh Metalloys is a trusted manufacturer and supplier of Stainless Steel 347 Bars in Mumbai, India, offering premium-quality solutions for demanding industrial applications. SS 347 is an austenitic stainless steel stabilized with columbium (niobium), specifically designed to resist intergranular corrosion in high-temperature environments. Our Stainless Steel 347 bars are available in various forms such as round, square, hex, and flat, and comply with international standards like ASTM A276 and ASTM A479. Known for its excellent weldability, toughness, and oxidation resistance, SS 347 bars are widely used in industries such as chemical processing, oil & gas, aerospace, and heat treatment equipment.
Stainless Steel 347 Bars contain 17–20% chromium, 9–13% nickel, and are stabilized with columbium (niobium), which prevents carbide precipitation during welding. The alloy has a tensile strength of approximately 515 MPa, a yield strength of 205 MPa, and good elongation properties. Its mechanical and corrosion-resistant properties remain stable even at elevated temperatures. SS 347 bars also maintain toughness and hardness after prolonged exposure to heat, making them suitable for high-temperature services where standard austenitic steels may fail. These properties enhance the longevity and performance of components in challenging environments.
| Specifications | ASTM A276 / ASME SA276 |
| Dimensions | ASTM, ASME |
| Range | 3.17 MM TO 350 MM DIA |
| Diameter | 25mm to 152mm |
| Length | 1 to 6 Meters, Custom Cut Length |
| Finish | Bright, Polish & Black |
| Form | Round, Square, Hex (A/F), Rectangle, Wire (Coil Form), Wiremesh, Billet, Ingot, Forging |
| Condition | Cold Drawn & Polished Cold Drawn, Centreless Ground & Polished |
|
Grade |
Mn |
N |
P |
C |
S |
Cr |
Mo |
Si |
Ni |
Other |
|
|
347 |
min. max |
2.00 |
– |
0.045 |
– 0.08 |
0.030 |
17.0 19.0 |
– |
0.75 |
9.0 13.0 |
Nb=10(C+N) 1.0 |
Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
Rockwell B (HR B) max | Brinell (HB) max | ||||
347 | 515 | 205 | 40 | 92 | 201 |
Contact us to get a quick quote for your requirement.
We ensures that all stainless steel 347 frames are rigorously tested for quality and performance. Our products are tested for technical properties, corrosion resistance and durability. We assure customers of high industry standards and compliance, offering comprehensive certifications including Mill Test Certificates (MTC) and third-party inspections.
Corrosion-resistant product with high-temperature stability, available in diameters ranging from 0.5″ to 12″. Ideal for use in aerospace, chemical processing, and power generation industries where durability is essential.
This product features exceptional resistance to oxidation, available in thicknesses from 0.25″ to 6″ and widths up to 12″. Perfect for structural components and industrial applications.
Stainless Steel 347 Square Bars are Corrosion-resistant product designed for durability, offered in sizes from 0.5″ to 6″ on each side. Suitable for use in high-temperature environments and demanding industrial applications.
This Corrosion-resistant product with dimensions ranging from 0.5″ x 1″ to 6″ x 12″. Ideal for heavy-duty applications where strength and resistance to harsh conditions are required.
Stainless Steel 347 Hexagonal Bars are Corrosion-resistant product with sizes from 0.5″ to 4″ across flats. Used in aerospace and chemical industries, offering high performance in extreme environments.
Stainless Steel 347 T-Bars dimensions from 0.5″ x 0.5″ to 6″ x 6″. Suitable for structural support and applications requiring high-temperature resistance and reliability.
Stainless Steel 347 Bars are used in a wide range of industries requiring superior heat resistance and corrosion protection. These bars are ideal for high-temperature chemical processing, furnace parts, heat exchanger tubing, aerospace components, and marine equipment. Their resistance to intergranular corrosion after welding makes them ideal for welded structures and pressure vessels. In power plants and refineries, SS 347 bars are used in boiler casings, superheaters, and re-heaters. Harsh Metalloys supplies SS 347 bars in various dimensions and finishes, tailored to meet customer-specific needs and ensure optimal performance in both structural and high-pressure environments.
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