ASTM A276 UNS S30403 Stainless Steel 304L Round Bars Manufacturer, Supplier and Stockist in India

Steel House India is a manufacturer, supplier, and stockist of ASTM A276 UNS S30403 Stainless Steel 304L Round Bars for industrial fabrication systems, process engineering infrastructure, pressure assemblies, hygienic processing systems, and corrosion-resistant engineering applications. SS304L round bars are widely used across industries requiring reliable weldability, low carbon composition, dimensional stability, and resistance against intergranular corrosion after fabrication.

ASTM A276 Type 304L stainless steel round bars belong to the austenitic stainless steel family and are commonly used for fabrication-heavy industrial environments where welding performance and corrosion resistance are critical. Stainless steel 304L bright bars and cold drawn SS304L round bars are extensively used for pharmaceutical systems, food-grade processing infrastructure, fabrication assemblies, process piping systems, heat exchangers, and structural engineering applications requiring long-term corrosion-resistant performance.

Stainless Steel 304L Round Bars for Corrosion Resistant Fabrication Applications

ASTM A276 UNS S30403 stainless steel 304L round bars provide balanced corrosion resistance, fabrication flexibility, dimensional stability, and mechanical strength for industrial engineering systems requiring reliable welding performance and corrosion-resistant operation. The reduced carbon composition improves resistance against intergranular corrosion after welding and supports fabrication-heavy applications.

SS304L bright bars are also preferred for applications requiring smoother surface finish, precision dimensional tolerances, and fabrication-ready material performance. Their oxidation resistance, polishing capability, and fabrication compatibility make them suitable for pressure systems, hygienic engineering assemblies, process infrastructure, and industrial fabrication environments requiring long operational service life.

Chemical Composition and Mechanical Properties of ASTM A276 UNS S30403 Stainless Steel 304L Round Bars

ASTM A276 Type 304L stainless steel round bars are manufactured with controlled chemical composition and mechanical properties to maintain weldability, corrosion resistance, fabrication compatibility, and dimensional consistency across industrial fabrication and processing environments.

Chemical Composition of UNS S30403 Stainless Steel 304L Round Bars

Condition	Carbon C %	Manganese Mn %	Silicon Si %	Phosphorus P %	Sulfur S %	Chromium Cr %	Nickel Ni %	Nitrogen N %	Iron Fe
ASTM A276 Type 304L	0.03 Max	2.00 Max	1.00 Max	0.045 Max	0.030 Max	18.00–20.00	8.00–12.00	0.10 Max	Balance
UNS S30403	0.030 Max	2.00 Max	1.00 Max	0.045 Max	0.030 Max	18.00–20.00	8.00–12.00	0.10 Max	Balance
Cold Drawn SS304L	0.025	1.80	0.55	0.040	0.020	18.20	8.50	0.08	Balance
Bright Drawn SS304L	0.024	1.75	0.50	0.038	0.018	18.30	8.80	0.07	Balance
Annealed SS304L	0.026	1.85	0.60	0.040	0.022	18.10	8.60	0.08	Balance
Precision Ground SS304L	0.022	1.70	0.50	0.035	0.018	18.40	8.90	0.07	Balance

Mechanical Properties of ASTM A276 Type 304L Round Bars

Product Condition	Tensile Strength MPa	Yield Strength MPa	Elongation %	Hardness HB	Hardness HRB	Density g/cm³	Elastic Modulus GPa	Shear Modulus GPa
Annealed	485	170	40	187	90	8.00	193	77
Cold Drawn	690	390	36	205	94	8.00	193	77
Bright Drawn	720	420	34	215	95	8.00	193	77
Hot Rolled	610	250	38	201	92	8.00	193	77
Forged Condition	640	280	36	207	93	8.00	193	77
Centerless Ground	710	410	35	210	94	8.00	193	77

Physical Properties of SS304L Bright Bars

Property Type	Density kg/m³	Melting Range °C	Thermal Conductivity W/mK	Electrical Resistivity µΩ.m	Thermal Expansion µm/m°C	Specific Heat J/kgK	Magnetic Permeability	Elastic Modulus GPa
SS304L Bright Bars	8000	1400–1450	16.2	0.72	17.2	500	1.02	193
Cold Drawn SS304L	8000	1400–1450	16.1	0.71	17.1	500	1.01	193
Hot Rolled SS304L	8000	1398–1450	16.0	0.70	17.0	500	1.01	193
Precision Ground SS304L	8000	1400–1448	16.3	0.72	17.3	500	1.02	193
Annealed SS304L	8000	1400–1450	16.2	0.71	17.2	500	1.01	193

ASTM A276 Stainless Steel 304L Round Bar Specifications and Size Range

Steel House India supplies ASTM A276 UNS S30403 stainless steel 304L round bars in bright drawn, cold drawn, hot rolled, forged, peeled, polished, and centerless ground conditions for industrial fabrication systems and corrosion-resistant engineering applications requiring dimensional consistency and fabrication-ready material specifications.

SS304L round bars are available in multiple diameter ranges and finish conditions for pressure systems, fabrication assemblies, hygienic infrastructure, process engineering systems, and industrial processing applications requiring reliable corrosion-resistant performance.

SS304L Round Bar Dimensions and Product Forms

Product Form	Diameter Range	Metric Sizes	Inch Sizes	Length Range	Surface Finish	Manufacturing Process	Custom Cutting
Bright Bars	3 mm – 100 mm	M3 – M100	1/8" – 4"	3–6 Meter	Bright	Cold Drawn	Yes
Cold Drawn Bars	5 mm – 120 mm	M5 – M120	3/16" – 5"	3–6 Meter	Smooth	Cold Finished	Yes
Hot Rolled Bars	16 mm – 350 mm	M16 – M350	5/8" – 14"	3–6 Meter	Black	Hot Rolled	Yes
Peeled Bars	20 mm – 150 mm	M20 – M150	3/4" – 6"	3–6 Meter	Peeled	Peeled & Straightened	Yes
Forged Bars	130 mm – 500 mm	M130 – M500	5" – 20"	Custom	Rough Forged	Forged	Yes
Centerless Ground Bars	5 mm – 90 mm	M5 – M90	3/16" – 3.5"	3–6 Meter	Ground	Precision Ground	Yes

Tolerance Specifications for Stainless Steel 304L Bright Bars

Diameter Range	h8 Tolerance mm	h9 Tolerance mm	h11 Tolerance mm	Straightness Deviation	Ovality mm	Surface Roughness Ra µm	Length Tolerance mm
3–6 mm	±0.022	±0.036	±0.090	0.5 mm/m	0.01	0.8	±2
6–12 mm	±0.027	±0.043	±0.110	0.5 mm/m	0.01	0.8	±2
12–30 mm	±0.033	±0.052	±0.130	0.5 mm/m	0.02	0.8	±2
30–50 mm	±0.039	±0.062	±0.160	0.8 mm/m	0.03	1.0	±3
50–80 mm	±0.046	±0.074	±0.190	0.8 mm/m	0.03	1.2	±3
80–120 mm	±0.054	±0.087	±0.220	1.0 mm/m	0.05	1.6	±5

Surface Finish Specifications of UNS S30403 Round Bars

Finish Type	Roughness Ra µm	Dimensional Accuracy	Straightness Quality	Fabrication Suitability	Surface Appearance	Precision Engineering Use	Manufacturing Process
Bright Finish	0.8	High	Excellent	Excellent	Smooth Metallic	High	Cold Drawn
Polished Finish	0.4	Precision	Excellent	Excellent	Reflective Surface	High	Polished
Peeled Finish	1.2	High	Very Good	Excellent	Clean Surface	Moderate	Peeled
Black Finish	3.2	Standard	Standard	Moderate	Oxide Scale	Low	Hot Rolled
Ground Finish	0.2	Precision	Excellent	Excellent	Fine Smooth	High	Ground
Matt Finish	1.8	Medium	Good	Good	Satin Surface	Moderate	Finished

Hot Rolled, Cold Drawn and Bright Drawn Stainless Steel 304L Round Bars

Hot rolled stainless steel 304L round bars are commonly used for structural engineering systems, fabrication assemblies, industrial processing infrastructure, and heavy engineering applications requiring larger diameters and machining allowance. These bars are suitable for fabrication systems where broader dimensional availability and industrial forming capability are required.

Cold drawn and bright drawn SS304L round bars provide tighter dimensional tolerances, smoother surface finish, improved straightness, and better fabrication compatibility for hygienic systems, process engineering assemblies, pharmaceutical infrastructure, pressure systems, and precision industrial fabrication applications.

Hot Rolled, Cold Drawn and Bright Drawn Stainless Steel 304L Round Bars

ASTM A276 UNS S30403 stainless steel 304L round bars are widely preferred for welding applications because of their reduced carbon composition, which minimizes carbide precipitation during welding operations and improves corrosion resistance across heat-affected zones.

SS304L round bars are extensively used for welded fabrication systems, process piping infrastructure, pressure assemblies, hygienic fabrication environments, and industrial processing systems where corrosion resistance after welding is important for long-term operational reliability and fabrication stability.

Applications involving higher chloride exposure, coastal processing environments, marine engineering systems, and aggressive chemical processing infrastructure often evaluate Stainless Steel 316 Round Bars Manufacturers in India for improved molybdenum-based corrosion resistance and enhanced protection against chloride-induced corrosion compared to standard SS304L round bars.

Carbide Precipitation Resistance of ASTM A276 Type 304L Round Bars

Property	SS304L	Conventional Stainless Grades
Carbon Percentage	0.03 Max	Higher
Weldability	Excellent	Moderate to High
Corrosion Resistance After Welding	Excellent	Moderate
Heat Affected Zone Stability	High	Moderate
Intergranular Corrosion Resistance	Excellent	Moderate
Fabrication Suitability	Excellent	Good
Post Weld Performance	Excellent	Moderate
Pressure System Compatibility	Excellent	Good

Welding and Fabrication Performance of SS304L Round Bars

Fabrication Property	Performance Level
TIG Welding Compatibility	Excellent
MIG Welding Compatibility	Excellent
Formability	Excellent
Machining Capability	Good
Structural Fabrication	Excellent
Pipe Fabrication	Excellent
Pressure Vessel Fabrication	Excellent
Hygienic System Fabrication	Excellent

ASTM A276 UNS S30403 Stainless Steel 304L Round Bars for Industrial Engineering Applications

SS304L round bars are widely used across pharmaceutical systems, food processing infrastructure, fabrication assemblies, process piping systems, hygienic engineering applications, pressure vessels, and industrial processing systems requiring corrosion-resistant stainless steel material with reliable fabrication compatibility.
Cold drawn and bright drawn stainless steel 304L round bars are also used across heat exchangers, fabrication assemblies, industrial engineering systems, polished processing equipment, structural fabrication applications, and corrosion-resistant engineering environments requiring long-term dimensional stability and welding reliability.

Stainless Steel 304L Bright Bars for Precision Engineering and Machining Applications

Stainless steel 304L bright bars are extensively used for precision engineering applications requiring smooth surface finish, tighter dimensional tolerances, improved straightness, and machining-ready material conditions. Bright drawn and centerless ground SS304L bars are commonly selected for shafts, machined fittings, polished components, fabrication systems, and industrial engineering assemblies requiring precision finish quality.
Precision ground stainless steel 304L round bars are widely used across fabrication systems and hygienic processing infrastructure requiring controlled tolerances, smoother finish quality, and fabrication-ready stainless steel material for machining and industrial assembly operations.

ASTM A276 Compliance Standards for UNS S30403 Stainless Steel 304L Round Bars

ASTM A276 establishes standard specifications for stainless steel bars used across fabrication systems, process engineering infrastructure, pressure assemblies, and industrial manufacturing environments. The standard defines dimensional tolerances, mechanical properties, finish conditions, straightness limits, inspection procedures, and material verification requirements for stainless steel round bars.
ASTM A276 compliant SS304L round bars are manufactured to maintain dimensional stability, fabrication compatibility, corrosion resistance, and inspection consistency across industrial engineering and processing applications requiring reliable material performance.

Equivalent Standards of ASTM A276 UNS S30403 Stainless Steel 304L Round Bars

ASTM Standard	AISI Grade	UNS Number	EN Equivalent	DIN Standard	JIS Standard	Werkstoff Number	ISO Grade
ASTM A276	304L	S30403	X2CrNi18-9	1.4307	SUS304L	1.4307	304L
ASTM A479	304L	S30403	X2CrNi18-9	1.4307	SUS304L	1.4307	304L
ASTM A182	F304L	S30403	X2CrNi18-9	1.4307	SUS304L	1.4307	304L

Material Testing and Inspection Standards for SS304L Round Bars

Testing Method	Inspection Type	Acceptance Standard	Frequency	Certification	Applicable Standard	Verification Purpose	Inspection Category
PMI Testing	Spectrometer	Grade Compliance	Batch Wise	Available	ASTM	Material Verification	Chemical
Tensile Testing	UTM	Mechanical Compliance	Batch Wise	Available	ASTM E8	Strength Validation	Mechanical
Hardness Testing	Brinell/Rockwell	Hardness Range	Batch Wise	Available	ASTM E18	Hardness Validation	Mechanical
Ultrasonic Testing	UT Inspection	Internal Soundness	As Required	Available	ASTM A388	Defect Detection	NDT
Dimensional Inspection	Micrometer	Tolerance Compliance	100%	Available	ASTM A276	Size Verification	Dimensional
Surface Inspection	Visual & Ra Testing	Finish Quality	100%	Available	ASTM A480	Surface Validation	Visual

Why Choose Steel House India for ASTM A276 UNS S30403 Stainless Steel 304L Round Bars

Steel House India supplies ASTM A276 UNS S30403 stainless steel 304L round bars for fabrication systems, process engineering infrastructure, pressure assemblies, hygienic processing applications, and corrosion-resistant industrial environments requiring dimensional consistency and fabrication-ready material specifications.
The supplied SS304L round bars are available in bright drawn, cold drawn, hot rolled, forged, peeled, polished, and centerless ground conditions for industrial engineering systems requiring precision finish quality, dimensional stability, controlled tolerances, and corrosion-resistant fabrication performance.

Stainless Steel 304L Round Bar Supplier for Fabrication and Corrosion Resistant Engineering Systems

Industrial fabrication systems, process piping infrastructure, hygienic engineering environments, pressure-compatible assemblies, and corrosion-resistant processing applications require stainless steel round bars with reliable weldability, dimensional consistency, and stable corrosion-resistant performance. ASTM A276 Type 304L stainless steel round bars are widely used across industrial engineering systems requiring low carbon stainless steel material for fabrication-heavy environments.
Steel House India supplies stainless steel 304L round bars for industrial applications requiring fabrication compatibility, corrosion resistance, dimensional accuracy, and ASTM-compliant stainless steel material specifications across process engineering, structural fabrication, hygienic systems, and industrial manufacturing infrastructure. Industries sourcing broader stainless steel product requirements often evaluate a trusted stainless steel round bar manufacturer in India for complete stainless steel round bar supply capability and engineering-grade material solutions.