Stainless Steel 347 Square Rods
Rose Metal Industries stands as a trusted manufacturer, stockist and exporter of Stainless Steel 347 Square Rods, offering top-quality, reliable stainless steel products to customers across India and around the world. SS 347, stabilized with niobium, is designed for applications that demand high temperature resistance, excellent weldability, and outstanding corrosion resistance — even under severe operating conditions.
We supply SS 347 Square Rods to major industrial and fabrication hubs across Tamil Nadu, Andhra Pradesh, Karnataka, Telangana, Puducherry (Pondicherry), and the Andaman & Nicobar Islands. These regions frequently require high‑performance stainless steel for chemical plants, offshore structures, marine installations, refinery units, and infrastructural projects. Our products meet the stringent requirements of such demanding environments..
Using advanced production and quality‑control systems, Rose Metal Industries ensures that our SS 347 Square Rods comply with international standards including ASTM, ASME, EN, DIN, and ISO. The rods offer excellent creep strength, resistance to oxidation, and mechanical stability at elevated temperatures — making them suitable for industrial furnaces, heat exchangers, exhaust systems, chemical processing equipment, and heavy structural fabrication.
Our inventory includes a wide range of square rod sizes, custom cut‑to‑length options, and multiple surface finishes (bright, black, peeled & turned). With ready stock available, we can deliver swiftly across Chennai, Bengaluru, Hyderabad, Coimbatore, Visakhapatnam, Mysuru, Port Blair, and other locations. We also support customized orders, export‑quality packaging, and third‑party inspection on request
Specifications & Standards
| Property | Details |
|---|---|
| Grade | Stainless Steel 347 |
| Standards | ASTM A276 / A479, EN, DIN, ASME |
| Form | Square Rods / Bars |
| Size Range | 10 mm × 10 mm up to 250 mm × 250 mm (other sizes on request) |
| Finish | Bright, Black, Peeled & Turned, Polished (on request) |
| Testing & Certification | MTC 3.1 / 3.2, PMI, Mechanical & Chemical Test Reports, Third‑party inspection (on demand) |
Chemical Composition (typical for SS 347)
| Element | % (max / range) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 13.0 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Niobium (Nb) | 10×C to 1.0 max |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
Mechanical Properties (typical values)
| Property | Value | Condition / Notes |
|---|---|---|
| Tensile Strength (UTS) | ≥ 515 MPa | Annealed condition |
| Yield Strength (0.2% offset) | ≥ 205 MPa | Annealed |
| Elongation | ≥ 40% | Good ductility |
| Hardness | Max 95 HRB | Annealed |
Equivalent Grades / Designations
| Standard Type | Equivalent Grade / Name |
|---|---|
| UNS | S34700 |
| EN / DIN | 1.4550 / X6CrNiNb18‑10 |
| BS | 347S31 |
| JIS / Others | Applicable on request |
Dimension Chart — Square Rods
| Side (mm) | Typical Length (mm) | Tolerance |
|---|---|---|
| 10 × 10 | 1000 – 3000 | ±0.5 mm |
| 20 × 20 | 1000 – 3000 | ±0.5 mm |
| 30 × 30 | 2000 – 4000 | ±0.8 mm |
| 50 × 50 | 2000 – 6000 | ±1.0 mm |
| 100 × 100 | 3000 – 6000 | Custom on request |
| Custom Sizes | As per requirement | On request |
Typical Applications
- Furnace parts and high-temperature structural components
- Heat exchangers & refinery equipment
- Petrochemical & chemical processing plants
- Exhaust manifolds & aerospace components
- Food processing, pharmaceutical & marine engineering equipment
- Marine structural fabrication and coastal installations in Tamil Nadu, Puducherry, Andhra Pradesh & Andaman Islands
Industries such as petrochemical, marine, food-processing, pharmaceutical, and structural engineering rely on our SS 347 Square Rods for their durability, resistance to intergranular corrosion, and consistent performance under cyclic heating or corrosive conditions. Coastal regions like Chennai, Puducherry, Visakhapatnam, and the Andaman Islands particularly benefit from SS 347’s resilience against chloride attack and salt‑spray corrosion.
With a strong commitment to quality, reliability, and customer satisfaction, Rose Metal Industries continues to expand its reach — exporting SS 347 Square Rods to markets in Middle East, Europe, Africa, Southeast Asia, and beyond. Our global‑supply credentials, combined with deep presence across South India, make us a preferred partner for stainless steel procurement and supply.
Frequently Asked Questions (FAQ)
Q1: What advantages does SS 347 have over SS 304 / 316?
A: SS 347 is stabilized with niobium, which prevents carbide precipitation during welding and high-temperature exposure, offering better resistance to intergranular corrosion and high-temperature strength than standard SS 304.
Q2: Do you supply to South Indian states and island territories?
A: Yes — we supply SS 347 Square Rods across Tamil Nadu, Andhra Pradesh, Karnataka, Telangana, Puducherry (Pondicherry), and the Andaman & Nicobar Islands with ready stock and efficient logistics.
Q3: Are custom sizes and finishes available?
A: Yes — we offer custom sizes, cut‑to‑length supply, various surface finishes (bright, black, polished), and special tolerances as per customer requirements.
Q4: Do you provide mill test certificates (MTC) and inspection?
A: Yes — we provide standard MTC (3.1 / 3.2) along with chemical analysis, mechanical test reports, and can facilitate third‑party inspections on request.
Q5: For which industries is SS 347 Square Rod most suitable?
A: SS 347 Square Rods are ideal for industries such as petrochemical, marine engineering, power generation, chemical processing, aerospace, food & pharmaceuticals — especially where high-temperature stability and corrosion resistance are critical.