Stainless Steel
Round Bars Manufacturer
Product Overview
Stainless steel round bars are produced via hot rolling, forging, and cold finishing to deliver a combination of corrosion resistance, dimensional accuracy, surface integrity, and mechanical strength. We supply bright, hot-rolled, forged, peeled, ground, and polished bars across common and specialty grades to meet demanding duty cycles in oil & gas, marine, chemical process, power, food & pharma, and precision engineering applications.
| Products |
|---|
|
Stainless Steel Bar |
|
Fasteners |
|
Forged Products |
|
Flanges |
|
Forged Fittings |
|
Stainless Steel Billets |
|
Round Corner Square Billets |
|
Stainless Steel Pipes |
|
Pipe Fittings |
|
Valve |
Stainless Steel Round Bars Specifications
| Property | Specification |
|---|---|
|
Material Grades |
SS 304, SS 316, SS 321, SS 410, SS 430 |
|
Diameter Range |
5mm to 500mm |
|
Length |
Up to 6 meters (custom sizes available) |
|
Surface Finish
|
Bright, Black, Polished, Rough Turned, Peeled & Ground |
|
Manufacturing Process |
Hot Rolled, Cold Drawn, Centerless Ground |
|
Tensile Strength |
515 MPa – 620 MPa |
|
Hardness |
80 – 95 HRB |
|
Standard & Compliance |
ASTM A276, ASME SA479, EN 10088, DIN 1.4301 |
Stainless Steel Round Bars Equivalent Grades
| Grade | UNS | EN / WNR |
|---|---|---|
|
SS 304 |
S30400 |
1.4301 / X5CrNi18-10 |
|
SS 316 |
S31600 |
1.4401 / X5CrNiMo17-12-2 |
|
SS 321 |
S32100 |
1.4541 / X6CrNiTi18-10 |
|
SS 410 |
S41000 |
1.4006 / X12Cr13 |
|
SS 430 |
S43000 |
1.4016 / X6Cr17 |
Manufacturing Routes & Finishes
| Finish | How It’s Made | Typical Surface (Ra, μm)* | Best For |
|---|---|---|---|
|
Hot-Rolled (HR) |
Hot rolling + scale removal |
6.3 – 12.5 |
Forging stock, general machining
|
|
Peeled/Turned
|
Scale removal by peeling/turning
|
3.2 – 6.3
|
Pre-machining, improved concentricity
|
|
Bright Drawn |
Cold drawing + straightening
|
1.6 – 3.2
|
Close tolerance, improved yield strength
|
|
Centerless Ground
|
Ground to size & finish |
0.8 – 1.6 |
Precision fits, bearings, shafts
|
|
Polished |
Mechanical polish to spec
|
≤0.8 (spec-dependent)
|
Aesthetic + hygienic surfaces
|
Typical values; tighter finishes on request.
Grades & Selection Guide
| Grade | Metallurgy | Where It Excels | When to Prefer Something Else |
|---|---|---|---|
|
304/304L |
Austenitic
|
General purpose, hygienic equipment, easy weldability |
Chlorides >200 ppm → consider 316/316L |
|
316/316L |
Austenitic, Mo-bearing
|
Chloride/acidic media, marine duty, pharma/chemical |
High hardness required → 410 or 17-4PH
|
|
410/420 |
Martensitic |
Wear resistance, hardenable shafts, pump components |
Aggressive corrosion → 316 or Duplex
|
|
17-4PH |
Precipitation-hardening
|
Very high strength with good corrosion resistance
|
Continuous service >315 °C → consult for alternatives
|
Applications of Stainless Steel Round Bars
Construction &
Infrastructure
Marine &
Offshore
Automotive &
Transportation
Manufacturing &
Heavy Equipment
Chemical &
Pharmaceutical Plants
Oil & Gas
Food & Beverage
Industry
Dimensional Capability & Tolerances
- Diameter range: 6 mm – 450 mm
- Length: up to 6 m (cut-to-length available)
- Dimensional tolerances: h9 / h10 / h11 (ISO 286) as standard; tighter to f8 upon request
- Roundness: controlled per finish and tolerance class
- Straightness: typically ≤1.0 mm/m (tighter available on request)
- Ends: square-cut, deburred/chamfered; end caps available for bright/polished bars
Standards & Compliance
- ASTM: A276, A479 (bars & shapes), A564 (17-4PH)
- ASME: SA-276 / SA-479 equivalents
- EN/DIN/JIS available on request
- Documentation: EN 10204 3.1 MTC as standard; 3.2 by arrangement
Quick Comparison — 304 vs 316 vs 410
| Property | 304/304L | 316/316L | 410 |
|---|---|---|---|
|
Corrosion (general) |
Very good
|
Excellent (chlorides, acids)
|
Moderate
|
|
Strength (room temp)
|
Moderate
|
Moderate
|
High (after hardening)
|
|
High (after hardening)
|
No
|
No
|
Yes (martensitic) |
|
Weldability |
Excellent
|
Excellent
|
Limited (preheat / PWHT as needed)
|
|
Typical Use
|
Fabrication, hygienic
|
Marine, chemical/pharma |
Shafts, tools, valve parts
|
Mechanical & Corrosion Behavior (Guidance)
- Austenitic (304/316): Non-hardenable by heat treatment; work-hardens with cold finish. 316(L) preferred for chlorides/seawater.
- Martensitic (410/420): Hardenable; balance hardness vs. toughness via tempering. Requires weld procedure controls.
- 17-4PH: Achieves very high strength via age hardening (H900–H1150 conditions).
- Duplex: Higher yield strength than austenitics and excellent SCC resistance; observe heat input control during welding.
For precise design allowables, use the relevant material standard or project specification.
Machining, Welding & Fabrication Notes
- Machining: Use carbide tooling, generous coolant, and positive rake; bright/ground bars reduce setup time.
- Work-hardening (austenitic): Avoid rubbing—cut decisively, optimize feed to stay ahead of work-hardening.
- Welding: 304/316 weld readily; for 410/420 use matching or over-alloyed fillers and apply preheat/PWHT per WPS.
- Heat Treatment:
- 410/420: harden + temper to target hardness/toughness.
- 17-4PH: solution treat + age per property class (e.g., H900/H1025).
- 410/420: harden + temper to target hardness/toughness.
- Surface Integrity: Post-machining passivation can restore corrosion performance (especially for hygienic or marine service).
Quality Assurance & Testing
Each batch is validated to specification with traceable records:
- PMI (chemical analysis) for grade verification
- Ultrasonic (UT) and eddy current (ECT) for internal/surface discontinuities
- Mechanical tests: tensile, hardness; impact when specified
- Dimensional inspection: diameter, roundness, straightness, surface finish
- Optional: intergranular corrosion (IGC), pitting potential, ferrite content (for duplex)
Supplied documents: EN 10204 3.1 MTC (heat chemistry, mechanicals, NDT); packing list; compliance statement to ordered standard.
Packing & Handling
- Corrosion protection: VCI/anti-rust wrap, end caps on bright/polished bars
- Unitization: strapped bundles on fumigated wooden pallets/crates
Marking: heat number, grade, size, finish, PO reference → full traceability
Frequently Asked Questions
Explore our FAQs for insights on materials, customization, and delivery.
What are the most commonly used stainless steel round bar grades?
The most common grades include SS 304, SS 316, SS 321, SS 410, and SS 430, each offering different strength and corrosion resistance properties.
Can stainless steel round bars be customized in size and finish?
Yes! We offer custom diameters, lengths, and surface finishes such as bright, polished, and black finishes.
Are your stainless steel round bars corrosion-resistant?
Yes, SS 316 round bars provide superior resistance to seawater, chemicals, and extreme environments.
Do you provide quality certification for stainless steel round bars?
Absolutely! All our products come with mill test reports, third-party inspection certificates, and compliance documents.
GET IN TOUCH
Our factory’s complete control ensures top-notch quality, prices, and service, reflecting our pride in what we do.
Get the Best Stainless Steel Round Bars from India's Top Manufacturer
Looking for high-quality stainless steel bars?
People Also Search For
- Stainless Steel Round Bars Manufacturer in India
- Buy SS 316 Round Bars for High-Strength Applications
- High-Quality Stainless Steel Cold Drawn Round Bars Supplier
- Best Stainless Steel Round Bars for Automotive & Construction
- Hot Rolled & Polished Stainless Steel Round Bars at Best Price
- Duplex & Super Duplex Stainless Steel Round Bars for Industrial Use
