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Stainless Steel Bright Bars Manufacturer, Supplier & Exporter – Inox Steel India

Inox Steel India is a trusted manufacturer, supplier, and exporter of Stainless Steel Bright Bars in grades 304, 316, 303, 410, and 431, supplying precision-engineered materials to industries across India, GCC countries, the Middle East, Africa, Europe, and the Americas. Our bright bars are developed for applications where tight dimensional tolerances, smooth surface finish, corrosion resistance, and consistent mechanical properties are essential for long-term performance.

Stainless steel bright bars from Inox Steel India are produced using controlled secondary processing such as cold drawing, peel turning, polishing, and centerless grinding. These processes enhance straightness, roundness, and surface integrity, making the bars ideal for high-speed CNC machining, rotating components, and critical mechanical assemblies.

Table of Contents

What Are Stainless Steel Bright Bars & How Are They Made?

Stainless Steel Bright Bars are cold-finished bars manufactured from hot-rolled stainless steel rods that undergo precision finishing operations to achieve improved surface quality and dimensional accuracy.

Manufacturing Steps — How ERW Pipes Are Produced

The ERW Pipe manufacturing process is fully automated and includes:

  1. Billet & Grade Selection – High-quality stainless steel billets of grades 304, 316, 303, 410, and 431
  2. Hot Rolling / Forging – Primary shaping into round, square, or hex bars
  3.  Cold Drawing / Peeling – Improves tensile strength and dimensional tolerance
  4. Heat Treatment (Annealing / Q&T as applicable) – Ensures uniform metallurgical structure
  5. Polishing / Centerless Grinding – Achieves superior surface finish and roundness
  6. Inspection & Testing – Dimensional, mechanical, chemical, and surface check

This controlled manufacturing process ensures that every stainless steel bright bar delivers repeatable machining performance, reduced tool wear, and excellent surface finish on final components.

Key Advantages of Stainless Steel Bright Bars

✔ Superior surface finish compared to hot-rolled bars
✔ Tight dimensional tolerances (h8 / h9 / h10)
✔ Enhanced machinability and reduced machining time
✔ Excellent corrosion resistance (304 & 316 grades)
✔ High strength options for mechanical loads (410 & 431 grades)
✔ Consistent quality with full heat traceability

Grades & Performance Overview

  • SS 304 Bright Bars – General corrosion resistance, excellent formability, widely used in food, pharma, and structural components
  • SS 316 Bright Bars – Molybdenum-alloyed grade offering superior resistance to chlorides and marine environments
  • SS 303 Bright Bars – Free-machining stainless steel ideal for high-speed CNC operations
  • SS 410 Bright Bars – Martensitic grade with higher strength for shafts and valves
  • SS 431 Bright Bars – High-tensile stainless steel suitable for heavy-duty and aerospace components

Each grade is supplied with EN 10204 3.1 certification, ensuring full compliance with international standards.

Applications of Stainless Steel Bright Bars by Grade & Industry

Stainless Steel Bright Bars supplied by Inox Steel India are extensively used in precision-driven and load-bearing applications where dimensional accuracy, strength, corrosion resistance, and machinability directly impact component life and performance. Selection of the correct grade depends on service environment, machining complexity, and mechanical load.

 STAINLESS STEEL BRIGHT BARS – MASTER TECHNICAL DATA SHEET 

Grades: 304 | 316 | 303 | 410 | 431

Parameter / Property SS 304 SS 316 SS 303 SS 410 SS 431
Material Type Austenitic Stainless Steel Austenitic Stainless Steel Free-Machining Stainless Steel Martensitic Stainless Steel Martensitic Stainless Steel
UNS Number S30400 S31600 S30300 S41000 S43100
ASTM Standard ASTM A276 / A479 ASTM A276 / A479 ASTM A276 / A479 ASTM A276 / A479 ASTM A276 / A479
EN Equivalent EN 1.4301 EN 1.4401 EN 1.4305 EN 1.4006 EN 1.4057
DIN Equivalent X5CrNi18-10 X5CrNiMo17-12-2 X8CrNiS18-9 X12Cr13 X17CrNi16-2
IS Standard IS 6603 IS 6603 IS 6603 IS 6603 IS 6603
Manufacturing Process Cold Drawn / Peeled / Polished / Centerless Ground Same as SS 304 Same as SS 304 Same as SS 304 Same as SS 304
Available Forms Round, Square, Hex, Flat Bright Bars Round, Square, Hex, Flat Bright Bars Round, Square, Hex, Flat Bright Bars Round, Square, Hex, Flat Bright Bars Round, Square, Hex, Flat Bright Bars
Diameter Range (Round) 3 – 150 mm 3 – 150 mm 3 – 150 mm 3 – 150 mm 3 – 150 mm
Square / Hex Size 5 – 100 mm 5 – 100 mm 5 – 100 mm 5 – 100 mm 5 – 100 mm
Standard Length 3 – 6 meters 3 – 6 meters 3 – 6 meters 3 – 6 meters 3 – 6 meters
Custom Cut Lengths As per drawing / requirement As per drawing / requirement As per drawing / requirement As per drawing / requirement As per drawing / requirement
Tolerance h8 / h9 / h10 h8 / h9 / h10 h8 / h9 / h10 h8 / h9 / h10 h8 / h9 / h10
Surface Finish Bright Cold Drawn / Polished / Centerless Ground Same as SS 304 Same as SS 304 Same as SS 304 Same as SS 304
Tensile Strength (MPa) ≥ 515 ≥ 515 ≥ 500 480 – 700 850 – 1000
Yield Strength (MPa) ≥ 205 ≥ 205 ≥ 190 ≥ 275 ≥ 650
Elongation (%) ≥ 40 ≥ 40 ≥ 35 ≥ 20 ≥ 15
Hardness (HB max) ≤ 201 ≤ 217 ≤ 229 ≤ 217 ≤ 269
Chemical Composition – Cr (%) 18 – 20 16 – 18 17 – 19 11.5 – 13.5 15 – 17
Chemical Composition – Ni (%) 8 – 10.5 10 – 14 8 – 10 — 1.25 – 2.5
Chemical Composition – Mo (%) — 2 – 3 — — —
Carbon (C % max) 0.08 0.08 0.15 0.15 0.20
Sulphur (S %) ≤ 0.03 ≤ 0.03 0.15 – 0.35 ≤ 0.03 ≤ 0.03
Testing Performed Chemical, Mechanical, Dimensional, PMI Same as SS 304 Same as SS 304 Same as SS 304 Same as SS 304
Certification EN 10204 3.1 / 3.2, ISO 9001 EN 10204 3.1 / 3.2, ISO 9001 EN 10204 3.1 / 3.2, ISO 9001 EN 10204 3.1 / 3.2, ISO 9001 EN 10204 3.1 / 3.2, ISO 9001
HSN / HS Code 7222 7222 7222 7222 7222
Typical Applications Machining, Food, Pharma, Structural Marine, Chemical, Pharma High-Speed CNC Machining Shafts, Valves, Mechanical Parts Aerospace, High-Strength Shafts
Packaging HDPE Wrap / Wooden Crate / Export Seaworthy Same as SS 304 Same as SS 304 Same as SS 304 Same as SS 304

 

 

Grade-Wise Application Overview

  • SS 304 Bright Bars
    Widely used for general-purpose applications requiring corrosion resistance and hygiene.
    Typical Uses: Food processing equipment, pharmaceutical machinery, architectural fittings, general engineering components.
  • SS 316 Bright Bars
    Preferred for aggressive and chloride-rich environments due to molybdenum content.
    Typical Uses: Marine components, chemical processing equipment, valves, pump shafts, offshore fasteners.
  • SS 303 Bright Bars
    Designed for excellent machinability with minimal tool wear.
    Typical Uses: CNC-turned parts, connectors, bushings, threaded fasteners, precision pins.
  • SS 410 Bright Bars
    Offers higher strength and moderate corrosion resistance.
    Typical Uses: Shafts, valve parts, pump components, mechanical spindles.
  • SS 431 Bright Bars
    High tensile strength and good toughness after heat treatment.
    Typical Uses: Aerospace shafts, heavy-duty fasteners, high-load rotating components.

Size Range & Dimensional Capabilities

INOX Steel India supplies stainless steel bright bars in a wide range of sizes to meet OEM and project-specific requirements.

  • Round Bars: 3 mm to 150 mm
  • Square / Hex Bars: 5 mm to 100 mm
  • Standard Lengths: 3 to 6 meters
  • Custom Cut Lengths: As per drawing or tolerance requirement
  • Dimensional Tolerances: h8 / h9 / h10

Tight tolerances ensure reduced secondary machining and consistent interchangeability in mass production.

Surface Finish & Machining Benefits

  • Cold Drawn Bright Bars: Improved straightness and strength
  • Polished Bright Bars: Smooth surface finish for visible or precision parts
  • Centerless Ground Bright Bars: Excellent roundness and diameter control
  • Peel Turned Bars: Clean surface suitable for further machining

These finishes result in:
✔ Reduced tool wear
✔ Better surface finish after machining
✔ Lower production cycle time
✔ Improved dimensional repeatability

Indicative Stainless Steel Bright Bar Price (INR & USD)

Grade Approx. Price (INR / kg – Ex-Mumbai) Approx. Price (USD / kg – FOB India)
SS 304 ₹ 280 – ₹ 350 $ 3.40 – $ 4.25
SS 316 ₹ 340 – ₹ 420 $ 4.10 – $ 5.05
SS 303 ₹ 300 – ₹ 380 $ 3.65 – $ 4.55
SS 410 ₹ 240 – ₹ 310 $ 2.90 – $ 3.75
SS 431 ₹ 480 – ₹ 620 $ 5.80 – $ 7.45

Prices are indicative and vary based on size, finish, tolerance, and order quantity.

HSN / HS Code

  • HSN Code (India): 7222
  • HS Code (Export): 7222.20 / 7222.30 (depending on form and finish)

Testing & Quality Assurance

Every stainless steel bright bar supplied by Inox Steel India undergoes stringent quality checks:

  • Chemical Composition Analysis
  • Tensile & Yield Strength Testing
  • Dimensional & Straightness Inspection
  • Surface Finish Verification
  • PMI (Positive Material Identification)
  • Optional Third-Party Inspection (SGS / BV / TÃœV)

All supplies are backed with EN 10204 3.1 / 3.2 Mill Test Certificates ensuring full traceability.

Why Choose Inox Steel India for Stainless Steel Bright Bars

Inox Steel India is more than a material supplier — we are a solution-oriented manufacturer and global exporter of stainless steel bright bars, supporting OEMs, EPC contractors, and machining units with consistent quality and dependable supply.

Key Advantages:

✅ Manufacturer & Stockist with ready inventory
✅ Wide grade coverage: 304, 316, 303, 410, 431
✅ Precision finishes: Cold drawn, polished, centerless ground
✅ Tight tolerances: h8 / h9 / h10
✅ Full traceability with EN 10204 3.1 / 3.2
✅ Custom cut lengths to reduce machining waste
✅ Competitive INR & USD pricing
✅ Export-ready packing and documentation

Our focus is long-term reliability, not just supply.

Industries & Applications We Serve

Industry Typical Applications Preferred Grades
Machining & CNC Shafts, pins, bushings, turned parts 303, 304
Automotive & Engineering Gears, spindles, axles 410, 431
Fasteners & Fittings Bolts, nuts, connectors 304, 316
Marine & Offshore Pump shafts, marine fittings 316
Aerospace & Defence High-strength shafts & components 431

Each application is matched with the right grade, finish, and tolerance to ensure performance and safety.

Export Readiness & Packaging

All stainless steel bright bars are packed as per international export standards:

  • HDPE wrapped for corrosion protection
  • Wooden pallets / crates for safe handling
  • Bar-wise marking: Grade · Size · Heat No · Standard
  • Seaworthy packing for container shipments

Regular Export Destinations:
UAE · Saudi Arabia · Oman · Qatar · Nigeria · South Africa · Germany · Italy · UK · USA · Brazil

Ports of Dispatch:
JNPT (Mumbai) · Mundra · Hazira

SS 303 is preferred for high-speed CNC machining due to excellent machinability, while SS 304 is used for general-purpose machining.

SS 316 contains molybdenum, offering superior resistance to chlorides and marine environments compared to SS 304.

Bright bars are supplied in h8, h9, and h10 tolerances depending on size and finish.

The standard HSN code is 7222 for stainless steel bars and rods.

we supply custom cut lengths as per drawing to reduce machining time and material wastage.

Inox Steel India regularly exports stainless steel bright bars to GCC, Africa, Europe, and the Americas.

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