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Ganpat Metal manufactures and supplies certified Stainless Steel 347 Hex Bars conforming to ASTM A276 / ASME SA276, ASTM A479. Grade 347 is a columbium/niobium-stabilized austenitic stainless steel. Niobium prevents chromium depletion at grain boundaries during extended exposure to 425–850°C, delivering superior creep-rupture strength in boiler tubes, exhaust manifolds and refineries.
Our SS 347 hexagonal bars are supplied in cold drawn, centerless turned, annealed and pickled, or precipitation hardened condition depending on standard specifications. They exhibit superior surface smoothness, precise across-flats dimensions, excellent straightness, and uniform metallurgical grain structure tailored for CNC machined components and high-tensile fastener manufacturing.
We maintain extensive inventories in sizes from 3 mm to 100 mm across flats, ready for immediate dispatch from our Mumbai central warehouse with EN 10204 Type 3.1 Mill Test Certificates and optional third-party inspection.
GM handles enquiries for SS 347 Hex Bars where buyers need to match hexagonal bar dimensions, across flats (AF) tolerances, and material grade to project drawings or purchase specifications. The supplied inventory covers precision cold drawn and hot rolled sizes beginning from 3 mm up to 100 mm across flats, with custom cut-to-length and surface finish options.
Grade selection should be based on the mechanical tensile properties, hardness, corrosion resistance, and chemical composition required by the project application. Buyers should also confirm the applicable standard specification (ASTM / ASME / EN), delivery condition (cold drawn, annealed, or quenched & tempered), inspection requirements, and documentation before finalizing an order.
| Parameter | Specification |
|---|---|
| Standard Specifications | ASTM A276 / ASME SA276, ASTM A479 |
| Grade Designation | SS 347 (UNS S34700 / W.Nr. 1.4550) |
| Size Range (AF) | 3 mm to 100 mm Across Flats (1/8" to 4") |
| Length | 100 mm to 6000 mm / Custom cut lengths |
| Form & Profile | Hexagonal Bar (Hex Bar), Cold Drawn Hex Wire |
| Condition & Temper | Cold Drawn, Solution Annealed, Normalized & Tempered / Quenched |
| Surface Finish | Bright Cold Drawn, Pickled & Passivated, Polished |
| Dimensional Tolerance | ASTM A484 / EN 10278 h9, h10, h11 |
| Testing & Quality | 100% PMI, Tensile & Yield, Hardness, Microstructure, Ultrasonic (UT) |
| Documentation | EN 10204 3.1 / 3.2 Mill Test Certificate, NABL Accredited Lab Report |
Standard chemical composition limits conform to international metallurgical standards.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.08 max |
| Niobium / Columbium (Nb+Ta) | 10xC min – 1.00 max |
| Chromium (Cr) | 17.00 – 19.00 |
| Nickel (Ni) | 9.00 – 13.00 |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 0.75 max |
| Iron (Fe) | Balance |
Minimum mechanical property requirements in designated standard delivery condition:
| Property | Value (Annealed Condition) |
|---|---|
| Tensile Strength (min) | 515 MPa (75 ksi) |
| Yield Strength 0.2% (min) | 205 MPa (30 ksi) |
| Elongation in 2" (min) | 40% |
| Hardness (Brinell max) | 217 HB |
| Hardness (Rockwell B max) | 92 HRB |
| Density | 7.96 g/cm³ |
| Standard / Country | Designation |
|---|---|
| ASTM / ASME | A276 / SA276 Type 347, A403 WP347 |
| UNS | S34700 |
| Werkstoff Nr. | 1.4550 |
| EN / DIN | X6CrNiNb18-10 |
| JIS | SUS 347 |
| BS | 347S31 |
| Form / Type | Size Range | Length / Dimensions | Condition / Standard |
|---|---|---|---|
| Cold Drawn Hex Bar | 3 mm – 65 mm AF | 1000 mm – 6000 mm | Cold Drawn, h9/h11 Tolerance |
| Hot Rolled Hex Bar | 20 mm – 100 mm AF | Up to 6000 mm / Random | Hot Rolled, Annealed & Pickled |
| Precision Ground Hex | 5 mm – 50 mm AF | Up to 4000 mm | Centerless Ground, h8/h9 |
| Custom Cut Billets | All Available AF | Custom Cut-to-length | Deburred ends, Ready to machine |
Custom dimensions, special cuts, and tailored surface conditions available on request.
Enter hex bar dimensions (across flats & length) and click Calculate to get approximate weight.
Ganpat Metal manufactures and supplies certified SS 347 Hex Bars for industrial buyers across India. All materials are sourced from premium quality mills, fully tested for chemistry, mechanical properties, and dimensional tolerances, and supplied with complete traceable Mill Test Certificates.
Whether you require standard stock dimensions or customized sizes, Ganpat Metal maintains deep inventories in Mumbai and provides rapid dispatch, custom cut-to-length services, and third-party inspection support.
India
UAE
Saudi Arabia
Oman
Australia
Malaysia
Singapore
Bangladesh
Egypt
Brazil
Russia
Kazakhstan
| Requirement | Details to Provide |
|---|---|
| Grade & Material | Stainless Steel 347 (UNS S34700 / W.Nr. 1.4550) |
| Standard | ASTM A276 / ASME SA276, ASTM A479 |
| Size Across Flats (AF) | Required AF in mm or inches |
| Length | Standard 3000 mm / 6000 mm or custom cut lengths in mm |
| Delivery Condition | Cold Drawn / Annealed & Pickled / Quenched & Tempered |
| Quantity | Required quantity in kg, meters, or number of bars |
| Testing Requirements | PMI, Ultrasonic Testing, Hardness, Tensile, Third-Party Inspection |
| Documentation | EN 10204 3.1 / 3.2 MTC with full chemical and mechanical data |
