Vinit Stainless is a top-notch supplier and manufacturer of SS 347 bars in Chennai, India, providing corrosion-resistant and high-temperature stainless steel solutions. SS 347 is a niobium-stabilized austenitic stainless steel that gives outstanding resistance to intergranular corrosion following welding and exposure to high temperatures. It is especially beneficial in situations where temperatures are above 425°C. We at Vinit Stainless provide SS 347 bars with accurate finishing, close tolerances, and uniform mechanical performance. These SS 347 bars are particularly suitable for applications in aerospace, chemical processing, and petroleum refining, where weldability, heat resistance, and strength are critical requirements.
SS 347 has 17–20% chromium, 9–13% nickel, ≤0.08% carbon, and columbium (niobium) stabilization. The tensile strength of this alloy ranges from 515–585 MPa, with a minimum yield strength of 205 MPa, and elongation ranging from 35–40%. The alloy has good toughness and ductility even at cryogenic conditions. SS 347 gives excellent resistance to intergranular corrosion and mechanical stability with prolonged exposure to high temperatures. It also resists creep deformation and stress rupture and is used in welded high-temperature service.
| 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 |
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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.
SS 347 bars find application in heat exchangers, pressure vessels, superheaters, and welded piping systems. The alloy is best suited for chemical processing equipment, food processing units, and high-temperature gaskets. It‘s commonly employed in aerospace components, boiler tubing, expansion joints, and exhaust manifold parts. Because of its resistance to intergranular corrosion as well as capability to handle thermal cycling, SS 347 finds application in refinery heaters, catalytic converters, and furnace parts. The combination of weldability, oxidation resistance, and strength in the material makes it an ideal choice for long-term, high-stress industrial use.
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