Grades: 304, 304L, 316, 316L, 321, 347
Inox Steel India is one of the established manufacturers, suppliers, and exporters of stainless steel hex bars in India, supplying to engineering and industrial projects across GCC countries, the Middle East, African nations, Europe, and North & South America.
We supply stainless steel hex bars manufactured from premium austenitic stainless steel grades — 304, 304L, 316, 316L, 321, and 347 — conforming to ASTM A276 / ASTM A479 standards. These hex bars are widely used where torque transmission, corrosion resistance, and dimensional accuracy are critical.
With ISO-compliant manufacturing and strict quality control, stainless steel hex bars supplied by Inox Steel India offer consistent across-flat dimensions, uniform mechanical properties, and reliable machining performance for industrial applications.
A stainless steel hex bar is a solid long product with a hexagonal (six-sided) cross section, manufactured for applications requiring positive spanner grip, resistance to rotation, and precise machining. Compared to round bars, hex bars provide improved torque handling and are commonly used in fasteners, studs, nuts, bolts, and machined components.
Stainless steel hex bars are produced from solid stainless steel billets using hot rolling, cold drawing, or forging processes, followed by heat treatment and finishing operations to meet dimensional and metallurgical requirements.
These characteristics make stainless steel hex bars suitable for engineering, marine, chemical, food, and fabrication applications.
Stainless steel hex bars are supplied in the following grades:
All materials are supplied as per ASTM A276 / ASTM A479 specifications.
MASTER TECHNICAL DATA SHEET – STAINLESS STEEL HEX BARS
Grades: SS 304 | 304L | 316 | 316L | 321 | 347
Manufacturer, Supplier & Exporter: Inox Steel India
| Parameter | SS 304 | SS 304L | SS 316 | SS 316L | SS 321 | SS 347 |
|---|---|---|---|---|---|---|
| Product Form | Hexagonal Bars (Solid) | Hexagonal Bars (Solid) | Hexagonal Bars (Solid) | Hexagonal Bars (Solid) | Hexagonal Bars (Solid) | Hexagonal Bars (Solid) |
| Standard | ASTM A276 / A479 | ASTM A276 / A479 | ASTM A276 / A479 | ASTM A276 / A479 | ASTM A276 / A479 | ASTM A276 / A479 |
| Manufacturing Process | Hot Rolled / Bright / Forged | Hot Rolled / Bright / Forged | Hot Rolled / Bright / Forged | Hot Rolled / Bright / Forged | Hot Rolled / Bright / Forged | Hot Rolled / Bright / Forged |
| Surface Finish | Black / Bright / Polished | Black / Bright / Polished | Black / Bright / Polished | Black / Bright / Polished | Black / Bright / Polished | Black / Bright / Polished |
| Supply Condition | Annealed | Annealed | Annealed | Annealed | Annealed | Annealed |
| Carbon (C) % | ≤0.08 | ≤0.03 | ≤0.08 | ≤0.03 | ≤0.08 | ≤0.08 |
| Chromium (Cr) % | 18.0–20.0 | 18.0–20.0 | 16.0–18.0 | 16.0–18.0 | 17.0–19.0 | 17.0–19.0 |
| Nickel (Ni) % | 8.0–10.5 | 8.0–12.0 | 10.0–14.0 | 10.0–14.0 | 9.0–12.0 | 9.0–13.0 |
| Molybdenum (Mo) % | — | — | 2.0–3.0 | 2.0–3.0 | — | — |
| Stabilizing Element | — | — | — | — | Titanium (Ti) | Niobium (Nb) |
| Tensile Strength (MPa) | ≥515 | ≥485 | ≥515 | ≥485 | ≥515 | ≥515 |
| Yield Strength (MPa) | ≥205 | ≥170 | ≥205 | ≥170 | ≥205 | ≥205 |
| Elongation (%) | ≥40 | ≥40 | ≥40 | ≥40 | ≥40 | ≥40 |
| Hardness | ≤201 HB | ≤201 HB | ≤217 HB | ≤217 HB | ≤217 HB | ≤217 HB |
| Max Service Temperature | Up to 870 °C | Up to 870 °C | Up to 870 °C | Up to 870 °C | Up to 870 °C | Up to 900 °C |
| Corrosion Resistance | Good | Good | Excellent (Chloride) | Excellent (Chloride) | High (Heat Stable) | Very High (Creep/Weld) |
| Standard AF Sizes (mm) | 8–60 | 8–60 | 8–60 | 8–60 | 8–60 | 8–60 |
| Approx. Weight @12 mm AF | 0.98 kg/m | 0.98 kg/m | 0.98 kg/m | 0.98 kg/m | 0.98 kg/m | 0.98 kg/m |
| Approx. Weight @20 mm AF | 2.72 kg/m | 2.72 kg/m | 2.72 kg/m | 2.72 kg/m | 2.72 kg/m | 2.72 kg/m |
| Approx. Weight @30 mm AF | 6.11 kg/m | 6.11 kg/m | 6.11 kg/m | 6.11 kg/m | 6.11 kg/m | 6.11 kg/m |
| Standard Length | 3 m / 6 m | 3 m / 6 m | 3 m / 6 m | 3 m / 6 m | 3 m / 6 m | 3 m / 6 m |
| Custom Cut Length | Available | Available | Available | Available | Available | Available |
| Dimensional Tolerance | As per ASTM A276 | As per ASTM A276 | As per ASTM A276 | As per ASTM A276 | As per ASTM A276 | As per ASTM A276 |
| Straightness | ≤1/1000 of length | ≤1/1000 of length | ≤1/1000 of length | ≤1/1000 of length | ≤1/1000 of length | ≤1/1000 of length |
| Testing | Chemical, Mechanical, PMI | Chemical, Mechanical, PMI | Chemical, Mechanical, PMI | Chemical, Mechanical, PMI | Chemical, Mechanical, PMI | Chemical, Mechanical, PMI |
| Certification | EN 10204 3.1 / 3.2 | EN 10204 3.1 / 3.2 | EN 10204 3.1 / 3.2 | EN 10204 3.1 / 3.2 | EN 10204 3.1 / 3.2 | EN 10204 3.1 / 3.2 |
| HSN / HS Code | 7222.20.11 | 7222.20.11 | 7222.20.11 | 7222.20.11 | 7222.20.11 | 7222.20.11 |
| Packaging | HDPE wrap, wooden crates, steel strapped bundles | Same | Same | Same | Same | Same |
When selecting stainless steel hex bars, the following parameters should be evaluated:
Proper grade selection ensures long service life, dimensional stability, and machining efficiency.
In India, stainless steel hex bars are extensively used by fastener manufacturers, CNC machining units, valve manufacturers, and fabrication industries, particularly in industrial hubs such as Mumbai, Pune, Ahmedabad, and Coimbatore.
Export demand is driven by marine hardware, chemical processing equipment, and engineering components requiring ASTM-compliant stainless steel hex bars.
Inox Steel India supports domestic and international supply with ready stock, standard documentation, and export packaging.
Stainless steel hex bars supplied by Inox Steel India are used in applications where mechanical strength, corrosion resistance, and precise machining are required. Each stainless steel grade offers specific performance characteristics suitable for different service conditions.
SS 304 / 304L Hex Bars
SS 316 / 316L Hex Bars
SS 321 Hex Bars
SS 347 Hex Bars
Stainless steel hex bars are supplied in standard metric hex bar sizes as per ASTM tolerances.
(Refer to the Hex Bar Size Chart in mm and Standard Hex Bar Sizes in mm PDF for detailed dimensions and weights.)
| AF Size (mm) | Approx. Weight (kg/m) |
|---|---|
| 8 | 0.43 |
| 10 | 0.68 |
| 12 | 0.98 |
| 16 | 1.74 |
| 20 | 2.72 |
| 25 | 4.25 |
| 30 | 6.11 |
| 40 | 10.86 |
| 50 | 16.90 |
| 60 | 24.60 |
Weights are indicative and may vary based on tolerance and finish.
| Grade | Approx. Price INR / kg | Typical Use |
|---|---|---|
| SS 304 / 304L | ₹ 240 – ₹ 320 | General engineering |
| SS 316 / 316L | ₹ 320 – ₹ 420 | Marine & chemical |
| SS 321 | ₹ 360 – ₹ 460 | High-temperature |
| SS 347 | ₹ 380 – ₹ 480 | Welded / creep service |
Prices depend on size, finish (black / bright / polished), quantity, and market conditions.
HSN Code: 7222.20.11
Applicable for stainless steel bars and rods under Indian and international trade classification.
Stainless steel hex bars undergo inspection and testing to ensure compliance with ASTM standards.
Tests Conducted:
Material is supplied with EN 10204 3.1 / 3.2 certification and heat number traceability.
Inox Steel India supplies stainless steel hex bars with controlled manufacturing, standard compliance, and documented traceability. Material is sourced, processed, and inspected to meet project specifications for domestic and export requirements.
Key supply features include:
Stainless steel hex bars are supplied to the following industries:
Grade selection is aligned with service environment, mechanical requirement, and fabrication conditions.
Stainless steel hex bars are packed and dispatched as per standard industrial and export practices.
Dispatch is supported through JNPT (Mumbai), Mundra, and Hazira ports for export shipments.
Stainless Steel Hex Bars Manufacturer & Supplier – SS 304, 316, 321, 347 | Inox Steel India
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
steel@inoxsteelindia.in
+91 9930796690
Grades include SS 304, 304L, 316, 316L, 321, and 347. Standard across-flat sizes range from 8 mm to 60 mm. Larger sizes can be supplied on request. Yes, stainless steel hex bars can be supplied in custom cut lengths as per requirement. The applicable HSN code is 7222.20.11. Yes, material is supplied with EN 10204 3.1 / 3.2 test certification. What grades are available in stainless steel hex bars?
What are the standard hex bar sizes in mm?
Are custom cut lengths available?
What is the HSN code for stainless steel hex bars?
Are test certificates provided with supply?
Manufacturer and supplier of stainless steel hex bars in grades 304, 304L, 316, 316L, 321, and 347 as per ASTM A276 / A479. Standard and custom sizes available from Inox Steel India.