Steel House India is an ASTM A276 AISI 304 stainless steel round bar manufacturer, supplier, and stockist in India supplying industrial-grade stainless steel bars for machining, fabrication, process engineering, pressure-compatible systems, and corrosion-resistant industrial infrastructure. ASTM A276 AISI 304 stainless steel round bars are widely used across pharmaceutical processing, food-grade manufacturing, chemical processing plants, fabrication industries, pressure assemblies, and industrial engineering applications where corrosion resistance, dimensional consistency, weldability, and machining stability directly influence operational reliability and fabrication quality.
Industrial procurement teams sourcing ASTM A276 AISI 304 stainless steel round bars generally evaluate material traceability, surface finish quality, tolerance accuracy, welding compatibility, and mechanical consistency before procurement. Applications involving fabrication-intensive manufacturing systems, hygienic process infrastructure, and CNC machining operations commonly require stainless steel materials capable of maintaining corrosion resistance and structural integrity under industrial operating conditions.
AISI 304 Stainless Steel Round Bar
ASTM A276 AISI 304 Stainless Steel Round Bar
ASTM A276 AISI 304 S S Round Bar
ASTM A276 AISI 304 Stainless Steel Round Bar
ASTM A276 covers hot-finished and cold-finished stainless steel bars used in machining, fabrication, structural engineering, and industrial processing systems requiring controlled dimensional tolerances and reliable mechanical properties. AISI 304 stainless steel, also designated as UNS S30400 and EN 1.4301, is one of the most widely used austenitic stainless steel grades because of its balanced corrosion resistance, fabrication compatibility, oxidation resistance, and weldability across industrial engineering applications.
ASTM A276 AISI 304 stainless steel round bars are extensively used in fabrication systems, industrial machinery, process piping infrastructure, pressure assemblies, rotating equipment, and hygienic processing environments requiring corrosion-resistant and fabrication-compatible materials.
ASTM A276 AISI 304 Stainless Steel Round Bar Chemical Composition
| Element | Percentage (%) | ASTM Limit | Typical Value | Industrial Relevance | Testing Method |
|---|---|---|---|---|---|
| Carbon (C) | 0.08 Max | ≤ 0.08 | 0.05 | Weldability | Spectrometer |
| Chromium (Cr) | 18.00 – 20.00 | 18.00 – 20.00 | 18.40 | Corrosion Resistance | PMI Testing |
| Nickel (Ni) | 8.00 – 10.50 | 8.00 – 10.50 | 8.20 | Toughness & Ductility | Spectrometer |
| Manganese (Mn) | 2.00 Max | ≤ 2.00 | 1.45 | Hot Working Stability | Chemical Analysis |
| Silicon (Si) | 1.00 Max | ≤ 1.00 | 0.48 | Oxidation Resistance | Spectrometer |
| Phosphorus (P) | 0.045 Max | ≤ 0.045 | 0.030 | Structural Stability | Chemical Analysis |
| Sulfur (S) | 0.030 Max | ≤ 0.030 | 0.015 | Machining Behavior | Spectrometer |
| Nitrogen (N) | 0.10 Max | ≤ 0.10 | 0.06 | Strength Enhancement | PMI Testing |
Mechanical Properties of ASTM A276 AISI 304 Stainless Steel Round Bars
| Property | Value | ASTM Requirement | Typical Industrial Range | Unit | Industrial Importance |
|---|---|---|---|---|---|
| Tensile Strength | 515 | ≥ 515 | 515 – 720 | MPa | Structural Reliability |
| Yield Strength | 205 | ≥ 205 | 205 – 310 | MPa | Load Handling |
| Elongation | 40 | ≥ 40 | 40 – 60 | % | Fabrication Flexibility |
| Hardness | 201 Max | ≤ 201 | 170 – 201 | HB | Machining Stability |
| Density | 8.0 | Standard | 7.9 – 8.0 | g/cm³ | Material Weight |
| Melting Point | 1400 – 1450 | Standard | 1400 – 1450 | °C | Thermal Performance |
| Modulus of Elasticity | 193 | Standard | 190 – 200 | GPa | Structural Rigidity |
| Thermal Conductivity | 16.2 | Standard | 15 – 17 | W/mK | Heat Transfer |
ASTM A276 AISI 304 Stainless Steel Round Bar Specifications
| Diameter Range | Manufacturing Condition | Tolerance | Surface Finish | Length Range | Straightness |
|---|---|---|---|---|---|
| 6 mm – 18 mm | Cold Drawn | h9 / h11 | Bright Finish | 3 – 6 Meter | 0.5 mm/m |
| 20 mm – 50 mm | Peeled | h11 | Smooth Machined | 3 – 6 Meter | 0.8 mm/m |
| 55 mm – 100 mm | Hot Rolled | h13 | Black Finish | 3 – 12 Meter | 1.5 mm/m |
| 100 mm – 300 mm | Forged | ASTM Tolerance | Rough Turned | Custom Length | 2.0 mm/m |
| 10 mm – 80 mm | Centerless Ground | h8 / h9 | Polished Finish | 2 – 6 Meter | 0.3 mm/m |
| 12 mm – 60 mm | Bright Drawn | h9 | Bright Polished | 3 – 6 Meter | 0.5 mm/m |
| 25 mm – 90 mm | Annealed | h11 | Matte Finish | 4 – 7 Meter | 1.0 mm/m |
| 80 mm – 250 mm | Hot Finished | ASTM Standard | Mill Finish | Custom Length | 1.8 mm/m |
Hot Rolled, Cold Drawn and Bright ASTM A276 AISI 304 Stainless Steel Round Bars
Hot Rolled SS 304 Round Bars
Hot rolled ASTM A276 AISI 304 stainless steel round bars are commonly used in heavy engineering systems, industrial supports, structural fabrication applications, and machining operations requiring larger diameters and high mechanical strength.
Cold Drawn SS 304 Round Bars
Cold drawn SS 304 round bars are widely used in CNC machining, shaft manufacturing, industrial fasteners, precision engineering systems, and fabrication applications requiring tighter dimensional tolerances and improved surface finish quality.
Bright and Centerless Ground SS 304 Round Bars
Bright bars and centerless ground ASTM A276 AISI 304 stainless steel round bars are extensively used in rotating equipment, precision-machined components, pump shafts, conveyor systems, and industrial assemblies requiring tighter tolerances and superior surface finish quality.
Machining and Fabrication Characteristics of ASTM A276 AISI 304 Stainless Steel Round Bars
ASTM A276 AISI 304 stainless steel round bars provide reliable machining behavior and fabrication compatibility across industrial engineering applications involving welding, forming, machining, and structural fabrication. Stable hardness values and controlled surface finish quality improve tooling performance during CNC machining operations and reduce dimensional inconsistencies during industrial production processes.
Industries operating in fabrication-intensive environments commonly use SS 304 round bars for process fabrication assemblies, industrial supports, pressure piping systems, hygienic processing equipment, rotating assemblies, and machining applications requiring long-term corrosion resistance and fabrication reliability.
Surface Finish and Dimensional Accuracy
Surface Finish Specifications
| Surface Finish | Roughness Value (Ra) | Manufacturing Process | Straightness | Industrial Usage | Surface Condition |
|---|---|---|---|---|---|
| Bright Finish | 0.8 – 1.6 | Cold Drawn | 0.5 mm/m | CNC Machining | Smooth |
| Black Finish | 6.3 – 12.5 | Hot Rolled | 1.5 mm/m | Structural Fabrication | Oxide Layer |
| Peeled Finish | 1.6 – 3.2 | Peeled Bars | 0.8 mm/m | Shaft Manufacturing | Machined |
| Polished Finish | 0.4 – 0.8 | Centerless Ground | 0.3 mm/m | Precision Engineering | Reflective |
| Matte Finish | 2.0 – 4.0 | Annealed | 1.0 mm/m | Fabrication Systems | Uniform |
| Ground Finish | 0.6 – 1.2 | Precision Ground | 0.2 mm/m | Rotating Equipment | Fine Smooth |
| Mill Finish | 5.0 – 8.0 | Hot Finished | 1.8 mm/m | Industrial Supports | Raw |
| Satin Finish | 1.0 – 2.0 | Mechanical Polishing | 0.5 mm/m | Hygienic Systems | Low Reflective |
Tolerance and Dimensional Accuracy
| Parameter | Standard Range | Typical Value | Unit | Industrial Relevance | Inspection Method |
|---|---|---|---|---|---|
| Diameter Tolerance | h8 – h13 | h9 | ISO Standard | Precision Machining | Vernier / Micrometer |
| Straightness | 0.5 – 1.5 | 0.8 | mm/m | Shaft Manufacturing | Straightness Gauge |
| Length Tolerance | ±1 – ±5 | ±2 | mm | Fabrication Precision | Tape Measurement |
| Surface Roughness | 0.4 – 6.3 | 1.6 | Ra | CNC Machining Quality | Roughness Tester |
| Hardness Range | 180 – 201 | 190 | HB | Wear Resistance | Hardness Tester |
| Roundness | 0.02 – 0.08 | 0.04 | mm | Rotating Assemblies | Dial Gauge |
| Concentricity | 0.03 – 0.10 | 0.05 | mm | Precision Components | Precision Indicator |
| Flatness Variation | 0.05 – 0.15 | 0.08 | mm | Assembly Fitment | Surface Plate |
Industrial Applications of ASTM A276 AISI 304 Stainless Steel Round Bars
| Industry | Application | Operating Environment | Industrial Requirement | Common Bar Type | Surface Requirement |
|---|---|---|---|---|---|
| Pharmaceutical | Clean Room Assemblies | Hygienic | Corrosion Resistance | Bright Bar | Polished |
| Food Processing | Conveyor Systems | Moisture Exposure | Sanitary Surface | Cold Drawn | Satin Finish |
| Chemical Processing | Handling Equipment | Chemical Exposure | Oxidation Resistance | Hot Rolled | Pickled |
| CNC Engineering | Precision Components | Machining | Tight Tolerance | Centerless Ground | Bright |
| Marine Engineering | Structural Supports | Coastal Atmosphere | Corrosion Protection | Peeled Bar | Polished |
| Pressure Systems | Pipe Supports | High Pressure | Structural Stability | Forged Bar | Machined |
| Fabrication Industry | Structural Assemblies | Industrial Exposure | Weldability | Hot Finished | Mill Finish |
| Industrial Machinery | Pump Shafts | Rotating Load | Dimensional Stability | Ground Bar | Precision Finish |
ASTM A276 AISI 304 vs ASTM A276 AISI 304L Stainless Steel Round Bars
ASTM A276 AISI 304 and ASTM A276 AISI 304L stainless steel round bars are both austenitic stainless steel grades widely used in fabrication and corrosion-resistant industrial applications. However, SS 304L contains lower carbon content, improving resistance against carbide precipitation during welding operations.
Applications involving heavy welding and corrosive fabrication environments commonly prefer ASTM A276 AISI 304L Stainless Steel Round Bar because of improved corrosion resistance after welding and better suitability for welded industrial processing systems.
| Property | SS 304 | SS 304L | Industrial Impact | Welding Performance | Corrosion Resistance |
|---|---|---|---|---|---|
| Carbon Content | 0.08 Max | 0.03 Max | Weld Stability | Better in 304L | Higher in 304L |
| Tensile Strength | 515 MPa | 485 MPa | Structural Load | Similar | Similar |
| Yield Strength | 205 MPa | 170 MPa | Load Handling | Moderate | Moderate |
| Weldability | Good | Excellent | Fabrication | Better in 304L | Improved |
| Intergranular Corrosion | Moderate | Lower | Process Systems | Improved | Better |
| Fabrication Usage | General | Heavy Welding | Industrial Selection | Better in 304L | Higher |
| Pressure Systems | Suitable | Suitable | Mechanical Systems | Comparable | Comparable |
| Pharmaceutical Usage | Common | Preferred | Hygienic Systems | Better in 304L | Better |
Testing, Inspection and Certification
| Testing Method | Standard | Inspection Scope | Equipment Used | Industrial Importance | Certification |
|---|---|---|---|---|---|
| PMI Testing | ASTM A276 | Grade Verification | PMI Analyzer | Material Authenticity | EN 10204 3.1 |
| Hardness Testing | ASTM E10 | Hardness Validation | Brinell Tester | Wear Resistance | Test Report |
| Tensile Testing | ASTM E8 | Mechanical Strength | UTM Machine | Structural Reliability | MTC |
| Ultrasonic Testing | ASTM A388 | Internal Defect Detection | UT Equipment | Material Integrity | UT Report |
| Dimensional Inspection | ISO Standards | Size Accuracy | Micrometer | Precision Fitment | Inspection Report |
| Surface Finish Inspection | Ra Standard | Roughness Control | Roughness Tester | Machining Quality | QC Certificate |
| Straightness Testing | ASTM Standard | Bar Alignment | Straightness Gauge | Shaft Applications | Inspection Record |
| Visual Inspection | Internal QC | Surface Defects | Manual Inspection | Surface Quality | QC Clearance |
ASTM A276 AISI 304 Stainless Steel Round Bar Price Reference
Industrial procurement costs for ASTM A276 AISI 304 Stainless Steel Round Bars vary depending on diameter, manufacturing condition, tolerance requirements, surface finish, quantity, inspection requirements, and project volume. The following table provides indicative market reference pricing for commonly sourced SS 304 round bar specifications.
| Product Description | Grade Equivalent | Diameter Range (mm) | Supply Condition | Surface Finish | Indicative Price (USD/Ton) |
|---|---|---|---|---|---|
| ASTM A276 AISI 304 Round Bar | UNS S30400 | 5.5 – 500 | Hot Rolled | Mill Finish | US $1,000 – $2,000 |
| DIN 1.4301 Stainless Steel Round Bar | EN 1.4301 | 5.5 – 500 | Hot Rolled / Forged | Black Finish | US $1,400 – $3,600 |
| Inox 304 Stainless Steel Round Bar | UNS S30400 | 6 – 400 | Bright Drawn | Bright Finish | US $3,000 – $5,000 |
| SS DIN 1.4301 Round Bar | EN 1.4301 | 6 – 200 | Cold Drawn | Smooth Finish | US $650 – $1,650 |
| SUS 304 Stainless Steel Round Bar | JIS SUS304 | 5.5 – 500 | Bright Drawn | Polished Finish | US $1,100 – $2,684 |
Factors Affecting ASTM A276 AISI 304 Stainless Steel Round Bar Price
| Pricing Factor | Impact on Cost |
|---|---|
| Nickel Market Fluctuation | High |
| Diameter Size | Moderate to High |
| Surface Finish Requirement | Moderate |
| Bright Drawn Processing | High |
| Centerless Grinding | High |
| PMI Testing Requirement | Moderate |
| Custom Cutting | Moderate |
| Quantity Ordered | Can Reduce Unit Cost |
| Packaging Requirements | Moderate |
| Project-Based Procurement Volume | Can Improve Commercial Pricing |
Why Choose Steel House India for ASTM A276 AISI 304 Stainless Steel Round Bars
Steel House India supplies ASTM A276 AISI 304 stainless steel round bars for industrial applications requiring controlled tolerances, machining consistency, fabrication compatibility, and long-term corrosion resistance. Industrial engineering systems involving CNC machining, hygienic fabrication infrastructure, pressure assemblies, and structural fabrication applications commonly require stainless steel materials with reliable mechanical properties and dimensional accuracy.
Our ASTM A276 AISI 304 stainless steel round bars are available in hot rolled, cold drawn, bright, peeled, polished, and centerless ground conditions for industrial applications requiring fabrication-ready and machining-compatible stainless steel materials. We supply precision-engineered stainless steel bars with material traceability, inspection support, and controlled surface finish quality for pharmaceutical processing, food-grade systems, industrial fabrication, process engineering, and machining applications.
ASTM A276 AISI 304 Stainless Steel Round Bars for Industrial Procurement and Engineering Applications
Industrial applications involving machining, fabrication, hygienic processing systems, and pressure-compatible infrastructure require stainless steel round bars with controlled dimensional tolerances, reliable corrosion resistance, and stable machining behavior. Material consistency directly affects fabrication quality, welding performance, tooling life, and operational reliability across industrial engineering systems.
Steel House India supplies ASTM A276 AISI 304 stainless steel round bars for industrial procurement applications requiring corrosion-resistant performance, fabrication compatibility, dimensional accuracy, and machining-ready inventory across pharmaceutical processing, food manufacturing, fabrication infrastructure, process engineering systems, and industrial manufacturing applications.