Steel House India is a premier ASTM A276 AISI Stainless Steel 304 Hex Bar manufacturer in India, engineering high-precision long products for machining, valves, and structural applications. Sourced from premium VOD/AOD refined billets, our inventory features high microstructural uniformity across all sizes. As a trusted ASTM A276 AISI Stainless Steel 304 hex bar supplier in India, we supply across-flats (A/F) profiles from 5.5 mm precision rods up to heavy-forged 500 mm sections in standard 3 to 6 metre lengths.
As a leading ASTM A276 AISI Stainless Steel 304 hex bar stockist in India, we support your procurement with a budget-friendly wholesale baseline starting at ₹150/kg and a flexible 1 kg minimum order quantity (MOQ). Please note that base rates fluctuate daily with London Metal Exchange (LME) alloy surcharges and raw material movements. Contact our Mumbai sales desk for real-time spot quotes. Every bar is stored in climate-controlled facilities to eliminate ambient oxidation, ensuring your order arrives free of surface defects and fully certified.
Technical Performance of Austenitic Steel: Toughness, Formability, and Machine Efficiency
Grade 304 (designated internationally under UNS S30400 and Werkstoff Number 1.4301) represents the global benchmark for versatile, non-magnetic austenitic stainless steel. While free-machining variations like Grade 303 introduce high levels of sulfur to improve chip-breaking at the cost of structural strength, Grade 304 maintains strict low-sulfur boundaries. This chemical control preserves the material's native toughness, impact strength, and long-term durability under intense mechanical load.
➤ Excellent Fusion Welding Characteristics and Joint Safety
A major engineering advantage of selecting a premium cold-drawn 304 hexagonal profile is its exceptional weldability. Because the alloy minimizes sulfur contamination, it completely avoids the risks of hot cracking (solidification cracking) within the fusion zone during cooling. This makes it fully compatible with all standard industrial welding techniques, including Tungsten Inert Gas (TIG/GTAW), Metal Inert Gas (MIG/GMAW), and shielded metal arc welding (SMAW) frameworks, ensuring long-term field safety in structural assemblies.
➤ Self-Healing Passivation and Pitting Resistance
The specialized addition of a minimum 18% Chromium and 8% Nickel creates a highly resilient, self-healing chromium oxide passive film across the bar surface. This microstructural barrier insulates the underlying steel against atmospheric moisture, organic acids, and various corrosive chemical compounds. This chemical stability prevents localized pitting and crevice degradation, ensuring extended operational lifespans in demanding processing environments.
➤ Bypassing Secondary Milling via Cold-Drawn Profiles
Procuring precision cold-drawn hexagonal rods optimizes automatic machining runs. Our drawing lines produce highly uniform across-flats dimensions and clean 60-degree corner configurations. By feeding these true-to-geometry profiles directly into automatic 3-jaw chucks, swiss collets, or high-speed CNC feeders, engineering workshops completely bypass the secondary manufacturing stage of face-milling flats onto a standard round bar. This manufacturing advantage dramatically slashes cycle times for mass-production runs of hexagonal components, including high-torque nuts, specialized bolts, and fluid power valves.
Critical Engineering Guideline:
While Grade 304 delivers exceptional protection in standard atmospheric and industrial settings, it can face limitations when exposed to marine environments or chemical processing plants with high chloride concentrations. For applications subject to severe pitting risks from saltwater spray or harsh industrial acids, we recommend upgrading to an alloy with higher molybdenum content. View our dedicated [SS 316 Hex Bar Page] to select the right material for demanding conditions.
Verified Material Specifications, Manufacturing Compliance, and Certification
The technical parameters outlined below define the strict quality and mechanical criteria maintained across our ready stock lines. All physical dimensions, mechanical tolerances, and chemical thresholds listed on this product page are cross-referenced and fully validated against our internal certified specification sheets and international mill standards.
1. General Technical Profile and Material Standards
- Material Specifications: ASTM A276, ASTM A479, ASME SA276, ASME SA479
- Dimensional Delivery Codes: EN, DIN, JIS, ASTM, BS, ASME, AISI, IS
- Across-Flats (A/F) Sizing Options: 5.5mm to 500mm (Metric and Imperial profiles)
- Standard Length Profiles: 3 Meters to 6 Meters (Custom cut-to-length options available)
- Available Finishes: Cold Finished, Drawn Finish, Bright Polished, Centerless Ground
2. International Grade Cross-Reference Matrix
| American Standard | UNS Designation | EuroNorm (EN) | German Standard (W.Nr.) | Japanese Standard | British Standard | Russian Standard | French Standard |
|---|---|---|---|---|---|---|---|
| AISI 304 | UNS S30400 | X5CrNi18-10 | 1.4301 | SUS 304 | 304S31 | 08Х18Н10 | Z7CN18-09 |
3. Certified Mechanical Strength Properties
| Mechanical Property Profile | Minimum Certified Threshold Values |
|---|---|
| Ultimate Tensile Strength | 75,000 psi (approx. 515 MPa) |
| Yield Strength (0.2% Offset) | 30,000 psi (approx. 205 MPa) |
| Elongation Percentage (in 50mm) | 40% Minimum |
| Brinell Hardness (HB) | 201 Max Hardness Value |
4. Certified Physical Property Metrics
| Physical Property Parameter | Target Engineering Values |
|---|---|
| Material Density | 8.0 g/cm³ |
| Melting Point Threshold | 1400°C (2550°F) |
| Modulus of Elasticity | 193 GPa (28 × 10⁶ psi) |
| Electrical Resistivity | 72 microhm-cm (at 20°C) |
Sizing Charts, Tolerances, and Theoretical Mass Estimations
Calculating shipping weights, bulk volume displacement, and handling constraints is critical for freight planning and logistical management. To determine the precise theoretical mass of a true stainless steel hexagonal profile per linear meter, engineers utilize the following geometric constant formula: $$\text{Across Flats (mm)} \times \{Across Flats (mm)} \times 0.0068 ={Weight in Kilograms per Meter (Kg/m)
Metric To lerance Reference Grid (Bright / Cold Finished)
The dimensional tolerances for our metric across-flats profiles follow strict engineering limits to ensure a precise fit in automated production machinery:
| Width Range Across-Flats (A/F) | Lower Tolerance Boundary | Upper Tolerance Boundary |
|---|---|---|
| Up to and including 18mm | – 0.110 mm | + 0.000 mm |
| Over 18mm up to 30mm | – 0.130 mm | + 0.000 mm |
| Over 30mm up to 50mm | – 0.160 mm | + 0.000 mm |
| Over 50mm up to 80mm | – 0.190 mm | + 0.000 mm |
| Over 80mm up to 100mm | – 0.220 mm | + 0.000 mm |
| Over 100mm up to 130mm | – 0.350 mm | + 0.000 mm |
| Over 130mm up to 160mm | – 1.000 mm | + 0.000 mm |
| Over 160mm up to 320mm | – 1.000 mm | + 1.000 mm |
Indicative Sizing Chart and Global Reference Rates
The reference pricing below indicates baseline export and regional market values for high-demand sizes. For definitive high-volume quotes or custom sizes (such as 12mm or 3/4" A/F profiles), please contact our sourcing team.
| Size Sizing Designation (A/F) | Material Grade | Indicative Export Price (USD / Kg) | Indicative Gulf Price (AED / Kg) |
|---|---|---|---|
| 16MM A/F | AISI 304 | $3.09 | 11.36 AED |
| 17MM A/F | AISI 304 | $3.09 | 11.36 AED |
| 19MM A/F | AISI 304 | $2.97 | 10.92 AED |
| 20MM A/F | AISI 304 | $2.97 | 10.92 AED |
| 65MM A/F | AISI 304 | $3.94 | 14.48 AED |
| 70MM A/F | AISI 304 | $4.19 | 15.38 AED |
| 75MM A/F | AISI 304 | $4.25 | 15.60 AED |
Supply Chain Infrastructure: The Steel House India Advantage
Sourcing industrial alloys requires a manufacturing partner capable of backing up material claims with certified quality controls, reliable processing capabilities, and efficient logistics.
Over Three Decades of Field Experience
Established in the year 1992, Steel House India has built over 30 years of manufacturing, trading, wholesaling, and retailing experience as a trusted name in premium steel products, including SS Round Bars, Stainless Steel Bars, and Stainless Steel Coils. Our professional team includes skilled technicians, metallurgical engineers, and dedicated quality controllers who ensure all products adhere strictly to active international standards and quality norms. With a supply history of over 5,000+ high-quality products distributed to a network of 2,000+ satisfied clients and 150+ global partners, we provide strong supply chain support for both domestic and international projects.
Strategic Minimal Order Volumes (1 Kg MOQ Available)
To support diverse engineering needs, we offer a highly flexible Minimum Order Quantity (MOQ) of just 1 Kilogram. This low-volume threshold makes it easy for machine shops and research teams to secure certified materials for small repair jobs, precision prototypes, or specialized custom projects without committing to large, expensive bulk contracts.
Industrial Warehousing, Secure Packaging, and Dispatch Protocols
Operating out of our primary centralized warehouse lines in Mumbai, Maharashtra, we utilize specialized packaging standards to protect materials during transit. Because cold-drawn hex profiles feature sharp 60-degree edges necessary for proper wrench clearance, they can be vulnerable to edge dings, superficial scratches, and surface damage during transport. Our logistics team implements a multi-stage protection workflow:
■ Edge-Protection Bundling: Hexagonal profiles are packed tightly face-to-face to prevent movement and internal friction during shipping.
■ Moisture-Resistant Outer Wrap: Every bundle is enclosed in heavy-duty HDPE plastic wrap to protect the steel from rain, ambient humidity, and sea-air exposure during international shipping.
■ Traceability Assurance: All shipments are systematically marked with their corresponding heat numbers and delivered with full EN 10204 3.1 Mill Test Certificates (MTC), ensuring complete traceability for your quality compliance team.
Strategic Applications Across Modern Industries
The structural strength and high corrosion resistance of Grade 304 hex bars make them highly versatile components across several major industrial fields:
■ Manufacturing and Machinery: Used in high-volume CNC automatic lathe systems to produce custom machine keys, drive shafts, pins, and hydraulic fittings.■ Construction and Architecture: Chosen for high-strength architectural framings, glass curtain wall anchors, and exposed exterior fixtures that require excellent long-term resistance to weather.
■ Oil, Gas, and Chemical Processing: Applied in chemical processing lines to manufacture fluid power coupling sleeves, manifold components, and heavy-duty high-pressure fasteners.
■ Aerospace, Automotive, and Marine Components: Integrated into demanding transportation systems where material reliability, uniform across-flats sizing, and high structural safety are essential requirements.
Sourcing Verification: Frequently Asked Questions (FAQ)
What documentation is provided with a delivery of SS 304 hex bars?
Every order shipped from our Mumbai facility is accompanied by comprehensive EN 10204 3.1 Mill Test Certificates (MTC). This documentation provides complete traceability back to the original VOD/AOD furnace heat numbers, detailing the exact chemical composition, mechanical elongation metrics, yield properties, and non-destructive testing results.
How does market volatility affect the stated starting price of ₹150/Kg?
The base rate of ₹150/Kg serves as a baseline price point for standard inventory dimensions. Real-time commercial quotes are updated daily based on global element costs (such as nickel and chromium) on the LME, specialized surface finishes, custom cut lengths, and the total tonnage requested in the RFQ.
Are full material certifications included with low-volume 1 Kg orders?
Yes. We maintain consistent documentation standards across our entire operation. Whether you buy a 1 Kg order for prototype testing or close a multi-ton contract for large-scale production, every shipment is delivered with the same traceable chemical and mechanical paperwork.
Material Integrity & Technical Review Desk
This technical documentation is compiled and verified by the editorial desk at The Steel House India. Drawing on over three decades (30+ years) of manufacturing, wholesaling, and international distribution experience within the Indian steel market, we ensure that all technical metrics, dimensional charts, and grade comparisons reflect current international standards (including ASTM, ASME, DIN, and ISO). Our long-standing partnerships with premier domestic and global production mills ensure that all chemical thresholds and mechanical properties listed here match verified field performance for precision engineering and machining workshops.
■ Corporate Office & Primary Warehouse Infrastructure: Madhavbaug, Mumbai, Maharashtra, India
■ Primary Sourcing and RFQ Desk: sales@steelhouseindia.com
■ Technical Consulting Services: Available upon formal submission of an RFQ.
Explore Related Sourcing Lines
To compare mechanical properties or select materials for different structural environments, view our complete range of technical profiles:
■ [Premium SS 316 Hex Bars ] Enhanced protection against chlorides and marine environments.■ [Certified SS 303 Hex Bars ] Optimised for high-speed mass production and automated CNC milling.