SS 304 Black Round Bars are made from chromium-nickel austenitic stainless steel, designated UNS S30400. They are used for machining, fabrication and manufacturing industrial components. The black surface typically retains oxide scale from hot working, making these bars suitable for applications involving further machining or surface finishing.
Metalloy Steel supplies SS 304 Black Round Bars in India to meet industrial procurement requirements. Buyers can enquire about ASTM A276 and ASTM A479 SS 304 Round Bars, subject to the applicable product specification and material availability. Share your required diameter, length and quantity to check availability and request a quotation.
Complete mechanical, dimensional, and standard parameters for ASTM A276 / ASTM A479 UNS S30400 black bars and rods.
| Specification Parameter | Details |
|---|---|
| Product Name | SS 304 Black Round Bars |
| Material Grade | Stainless Steel 304 |
| UNS Designation | S30400 |
| Standards | ASTM A276, ASTM A479 |
| Werkstoff Number | 1.4301 |
| EN Designation | X5CrNi18-10 |
| JIS Designation | SUS 304 |
| British Standard Reference | BS 304S31 |
| Swedish Stainless Steel Reference | 2332 |
| Product Form | Round Bars / Rods |
| Surface Condition | Black / Hot-Worked Scale Finish, subject to supply condition |
| Dimensions | Diameter and length as per requirement |
| Cutting | Cut-to-length, subject to availability |
Graded chemical chemistry and physical-mechanical metrics of SS 304 (UNS S30400 / 1.4301).
| Standard / System | Grade or Designation |
|---|---|
| ASTM | 304 |
| UNS | S30400 |
| Werkstoff Number | 1.4301 |
| EN Designation | X5CrNi18-10 |
| JIS | SUS 304 |
| British Standard Reference | 304S31 |
| Swedish Stainless Steel Reference | 2332 |
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 0.75 max |
| Phosphorus (P) | 0.045 max |
| Sulphur (S) | 0.030 max |
| Chromium (Cr) | 18.00–20.00 |
| Nickel (Ni) | 8.00–11.00 |
| Property | Reference Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | Approximately 1400°C |
| Tensile Strength | 515 MPa (75,000 psi) |
| Yield Strength (0.2% Offset) | 205 MPa (30,000 psi) |
| Elongation | 35% |
For other available stainless steel and alloy grades, explore our Round Bars range.
Estimate real-time linear mass and total order weight for SS 304 and other industrial stainless steel round bars with our live 3D visualizer engine.
SS 304 Black Round Bars can be supplied in different conditions and dimensions depending on machining, fabrication and component requirements.
Supplied with a dark oxide-scale surface formed during hot rolling, commonly used as raw material for machining and fabrication.
Heat-treated to improve ductility and reduce hardness, subject to the specified supply condition.
Cut to required lengths for machining, fabrication and component manufacturing.
For applications requiring improved resistance to pitting and crevice corrosion in chloride-containing environments, explore our SS 316 Black Round Bars.
Versatile austenitic stainless steel engineered for cost-effective machining, formability, and reliable atmospheric corrosion resistance.
Suitable for producing shafts, pins, spacers and other turned components using appropriate stainless steel cutting parameters.
Can be welded using suitable procedures and compatible filler materials.
Performs well in many atmospheric and mildly corrosive environments when properly finished and maintained.
The black hot-worked surface makes these bars suitable for applications where machining or subsequent surface finishing is planned.
Typical components and engineering sectors utilizing Grade 304 austenitic stainless steel black round bars.
| Industry | Typical Components / Uses |
|---|---|
| General Engineering | Pins, shafts, spacers and machined components |
| Food Processing Equipment | Selected equipment parts and structural components, with appropriate cleaning and surface finishing |
| Chemical Processing | General-purpose fittings and components in compatible process environments |
| Construction & Fabrication | Brackets, supports, frames and fabricated assemblies |
| Machinery Manufacturing | Turned parts, bushes and non-specialised machine components |
| Water & Utility Equipment | Components for suitable water-handling and utility systems, depending on water chemistry |
Metalloy Steel can discuss inspection and documentation requirements for SS 304 Black Round Bars according to the purchase specification and order scope.
Can be requested, subject to availability, to document heat-specific chemical composition and mechanical test results.
Can help verify the material grade and distinguish SS 304 from other stainless steel grades.
Can be specified to verify the required elemental composition.
Tensile strength, yield strength, elongation and hardness testing can be requested according to applicable requirements.
Checks bar diameter, length, surface condition and specified tolerances.
Independent inspection may be arranged with an agreed agency, subject to availability and project requirements.
Clear technical answers to frequent queries regarding SS 304 black round bar supply, standards, and specifications.
SS 304 Black Round Bars are designated UNS S30400, with common equivalents including EN 1.4301 and JIS SUS 304.
ASTM A276 and ASTM A479 may apply, depending on the intended use and purchase specification.
Black bars generally retain a dark oxide-scale surface, while bright bars have a smoother, brighter finish.
Yes. They can be machined and welded using suitable tools, consumables and procedures.
Not all marine environments. Chloride exposure can cause pitting and crevice corrosion, so grade selection depends on service conditions.
Share your required diameter, length, quantity and applicable standard to enquire about availability and pricing.
Contact Metalloy Steel to enquire about SS 304 Black Round Bars in India. Share your required sizes, quantities, applicable ASTM specification and documentation requirements so the team can review availability and provide a quotation based on your order specifications.
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