What is a Stainless Steel Round Bar?
A stainless steel round bar is a solid cylindrical section produced by hot rolling, forging or cold drawing. Its circular cross-section spreads load evenly and avoids the localised stress points you get with angular profiles which is why the SS round bar is the default for shafts, axles, pins, valve stems, industrial rollers and machining stock.
Every stainless steel bar contains chromium, which forms a self-repairing passive oxide film on the surface. More chromium means faster repassivation and better corrosion resistance; adding molybdenum as in SS 316/316L or SS 904L extends that protection into chloride-rich and marine service.
As one of India’s established stainless steel round bar suppliers, Jade Alloys stocks material that combines high tensile strength, high-temperature tolerance and mechanical integrity for heavy-duty industrial work. The same product is often listed as a stainless steel rod, and we supply it alongside our full round bar range, sheets and plates and stainless steel fasteners.
Stainless Steel Round Bar Manufacturer in India
Jade Alloys is a Stainless Steel Round Bar manufacturer in India producing fully traceable, mill-tested, export-ready material to ASTM A276 and ASTM A479 the specifications covering hot-rolled and cold-finished bars, shapes and forgings for corrosion-resistant service.
Choice of finish follows the end use:
- Hot Rolled Stainless Steel Round Bar: Rougher surface, wider tolerance, best economy. Right where strength and corrosion resistance matter and appearance doesn’t: structural members, forging blanks, machining stock.
- Cold Drawn Stainless Steel Round Bar: Smooth bright surface, tight h8–h11 tolerance, higher yield strength from work hardening. Preferred for architectural work, outdoor fixtures and parts going straight into assembly.
- Peeled, Turned & Ground: For shafting and close-tolerance machining where concentricity is critical.
We hold stainless steel bar stock from 5 mm to 450 mm in 2 m to 6 m mill lengths, plus hex, square, flat, threaded and half-round profiles. If you need higher-alloy material, we also manufacture Duplex, Super Duplex, Inconel, Monel, Hastelloy and Titanium round bars.
Need to work out tonnage before you order? Run the numbers on our Metal Weights Calculator.
Stainless Steel Round Bar Manufacturer in India
| Specification | Details |
|---|---|
| Standards | ASTM A276, ASTM A479, ASTM A484, DIN 1013, EN 10088-3 |
| Diameter Range | 5 mm – 450 mm |
| Standard Length | 2 to 6 metres (8 to 20 feet); cut-to-length available |
| Length Tolerance | −0 / +10 mm on cut-to-length stock |
| Size Tolerance | h8, h9, h10, h11 (DIN 668 = h11, DIN 669/670/671 = h8–h9) |
| Chamfering | 30°, 45°, 60° — fully automatic both-end chamfering |
| Ultrasonic Testing | 100% UT per ASTM A388 / EN 10308 (Class 1–4) |
| Surface Finish | Cold drawn, bright drawn, centreless ground, rough turned, polished, No. 4, mirror |
| Heat Treatment | Annealed / Solution Annealed |
| Supply Condition | ANN (annealed), H&T (hardened & tempered), PH (precipitation hardened) |
| Technique | Hot rolled, cold drawn, forged |
| HSN Code | 7222 |
| Packing | Bundled, bubble-wrapped, wooden crates |
Stainless Steel Round Bar Grades
For aerospace work we supply to AMS specifications 17-4 PH to AMS-5643, 15-5 PH to AMS-5659, 304 to AMS-5639, 316 to AMS-5648, 321 to AMS-5645, 347 to AMS-5646, 410 to AMS-5613, 431 to AMS-5628 and 440C to AMS-5630. Full AMS cross-reference available on request.
Stainless Steel Round Bar Chemical Composition
The chemistry of an SS round bar dictates how it behaves under heat and in corrosive media.
| Grade | C | Mn | Si | P | S | Cr | Ni | Others |
|---|---|---|---|---|---|---|---|---|
| 304 / 304L | 0.08 / 0.03 | 2.00 | 0.75 | 0.045 | 0.030 | 18.0–20.0 | 8.0–12.0 | – |
| 309 / 309S | 0.20 / 0.08 | 2.00 | 1.00 | 0.045 | 0.030 | 22.0–24.0 | 12.0–15.0 | – |
| 310 / 310S | 0.25 / 0.08 | 2.00 | 1.50 | 0.045 | 0.030 | 24.0–26.0 | 19.0–22.0 | – |
| 314 | 0.25 | 2.00 | 1.5–3.0 | 0.045 | 0.030 | 23.0–26.0 | 19.0–22.0 | – |
| 316 / 316L | 0.08 / 0.03 | 2.00 | 0.75 | 0.045 | 0.030 | 16.0–18.0 | 10.0–14.0 | Mo 2.0–3.0 |
| 317 / 317L | 0.08 / 0.035 | 2.00 | 0.75 | 0.045 | 0.030 | 18.0–20.0 | 11.0–15.0 | Mo 3.0–4.0 |
| 321 / 321H | 0.08 / 0.04–0.10 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0–19.0 | 9.0–12.0 | Ti 5×(C+N) min |
| 329 | 0.08 | 1.00 | 0.75 | 0.040 | 0.030 | 23.0–28.0 | 2.0–5.0 | Mo 1.0–2.0 |
| 347 / 347H | 0.08 / 0.04–0.10 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0–19.0 | 9.0–13.0 | Nb 10×C min |
| 430 / 430F | 0.12 | 1.00 / 1.25 | 1.00 | 0.04 / 0.06 | 0.03 / 0.15 | 16.0–18.0 | 0.75 | – |
| 431 | 0.20 | 1.00 | 1.00 | 0.040 | 0.030 | 15.0–17.0 | 1.25–2.50 | – |
| 904L | 0.02 | 2.00 | 1.00 | 0.045 | 0.035 | 19.0–23.0 | 23.0–28.0 | Mo 4.0–5.0, Cu 1.0–2.0 |
| SMO 254 | 0.020 | 1.00 | 0.80 | 0.030 | 0.010 | 19.5–20.5 | 17.5–18.5 | Mo 6.0–6.5, N 0.18–0.22 |
% maximum unless a range is shown.
Mechanical & Physical Properties of Stainless Steel Round Bars
The chemical composition of an SS Round Bar determines its ability to resist heat and corrosion. Below is the standard composition for various grades:
| Grade | Tensile (MPa) | Yield 0.2% (MPa) | Elongation (%) | Hardness (HB) | Density (g/cm³) | Melting Point |
|---|---|---|---|---|---|---|
| 304 / 304L | 515 / 485 | 205 / 170 | 40 | 201 max | 7.93 | 1400 °C |
| 309 / 309S | 515 | 205 | 40 | 217 max | 7.90 | 1400 °C |
| 310 / 310S | 515 | 205 | 40 | 225 max | 7.90 | 1402 °C |
| 314 | 690 | 275 | 38 | 225 max | 7.90 | 1400 °C |
| 316 / 316L | 515 / 485 | 205 / 170 | 40 / 35 | 217 max | 7.98 | 1400 °C |
| 317 / 317L | 515 / 485 | 205 / 170 | 35 | 217 max | 7.95 | 1400 °C |
| 321 / 321H | 515 | 205 | 40 | 217 max | 7.95 | 1457 °C |
| 347 / 347H | 515 | 205 | 40 | 201 max | 7.95 | 1454 °C |
| 430 / 430F | 450 | 205 | 22 | 183 max | 7.70 | 1425 °C |
| 431 | 850–1000 | 635 | 11 | 285 max | 7.70 | 1450 °C |
| 329 | 590–780 | 390 | 18 | 270 max | 7.80 | 1440 °C |
| 904L | 490 | 220 | 35 | 150 max | 8.00 | 1350 °C |
| 17-4 PH | 1000–1100 | 860 | 12 | 363 max | 7.75 | 1404 °C |
Austenitic grades run a thermal conductivity of roughly 16.2 W/m·K and specific heat of ~500 J/kg·K; martensitic and PH grades conduct heat noticeably better (24–30 W/m·K), which matters for machining and welding heat input.
Stainless Round Bars Equivalent Grades
| ASTM / AISI | EN / Werkstoff | UNS | JIS | BS |
|---|---|---|---|---|
| SS 304 | X5CrNi18-10 / 1.4301 | S30400 | SUS 304 | 304S31 |
| SS 304L | X2CrNi18-9 / 1.4307 | S30403 | SUS 304L | 304S11 |
| SS 316 | X5CrNiMo17-12-2 / 1.4401 | S31600 | SUS 316 | 316S31 |
| SS 316L | X2CrNiMo17-12-2 / 1.4404 | S31603 | SUS 316L | 316S11 |
| SS 317L | X2CrNiMo18-15-4 / 1.4438 | S31703 | SUS 317L | – |
| SS 321 | X6CrNiTi18-10 / 1.4541 | S32100 | SUS 321 | – |
| SS 347 | X6CrNiNb18-10 / 1.4550 | S34700 | SUS 347 | – |
| SS 310S | X8CrNi25-21 / 1.4845 | S31008 | SUS 310S | 310S16 |
| SS 904L | X1NiCrMoCu25-20-5 / 1.4539 | N08904 | SUS 904L | 904S13 |
| SMO 254 | 1.4547 | S31254 | – | – |
Stainless Steel Round Bar Sizes
| Available Diameters (mm) | Available Diameters (mm) |
|---|---|
| 5.0 | 50.0 |
| 6.0 | 55.0 |
| 7.0 | 60.0 |
| 8.0 | 65.0 |
| 9.0 | 70.0 |
| 10.0 | 75.0 |
| 12.0 | 80.0 |
| 16.0 | 90.0 |
| 20.0 | 100.0 |
| 25.0 | 130.0 |
| 30.0 | 160.0 |
| 35.0 | 200.0 |
| 40.0 | |
| 45.0 |
Stainless Steel Round Bar Weight Chart
| Dia (mm) | kg/m | Dia (mm) | kg/m | Dia (in) | kg/m |
|---|---|---|---|---|---|
| 3 | 0.06 | 15 | 1.40 | 1/8″ | 0.06 |
| 4 | 0.10 | 16 | 1.59 | 3/16″ | 0.14 |
| 5 | 0.16 | 18 | 2.01 | 1/4″ | 0.25 |
| 6 | 0.22 | 20 | 2.48 | 5/16″ | 0.39 |
| 7 | 0.30 | 22 | 3.00 | 3/8″ | 0.56 |
| 8 | 0.40 | 24 | 3.57 | 1/2″ | 1.00 |
| 10 | 0.62 | 25 | 3.88 | 5/8″ | 1.56 |
| 12 | 0.89 | 32 | 6.31 | 3/4″ | 2.25 |
| 14 | 1.22 | 40 | 9.86 | 1″ | 4.03 |
Formula: Weight (kg/m) = Dia (mm) × Dia (mm) × 0.00623 Example: a 20 mm bar → 20 × 20 × 0.00623 = 2.49 kg/m.
For fasteners, cross-check against our Nuts Weight Chart and Bolts Weight Chart.
SS Round Bar Surface Finish Codes
| Code | Finish | Code | Finish |
|---|---|---|---|
| CG | Centreless ground | HF | Hot finished |
| P&T | Peeled and turned | RT | Rough turned / peeled |
| BD | Bright drawn | HRAP | Hot rolled annealed & pickled |
| CF | Cold finished | PR | Peeled and reeled |
| ST | Smooth turned | P | Polished |
| CD | Cold drawn | No. 4 | Brushed satin |
SS Round Bar Tolerance
Hot Rolled Stainless Steel Rod
| Finish | Plus Tolerance | Size Range (Inches) |
|---|---|---|
| Hot Rolled | + 3/64″ | Over 2.5 to 3.5, incl |
| Hot Rolled | + 0.0625″ | Over 3.5 to 4.5, incl |
| Hot Rolled | + 5/64″ | Over 4.5 to 5.5, incl |
| Hot Rolled | + 0.125″ | Over 5.5 to 6.5, incl |
| Hot Rolled | + 5/32″ | Over 6.5 to 8, incl |
| Hot Rolled | + 0.1875″ | Over 8 to 12, incl |
| Hot Rolled | + 7/32″ | Over 12 to 15, incl |
Cold Rolled Stainless Steel Rod
| Finish | Tolerance | Size Range (Inches) |
|---|---|---|
| Cold Finish | +/- 0.001″ | 0.0625 to 0.3125, excl |
| Cold Finish | +/- 0.0015″ | 0.3125 to 0.500, excl |
| Cold Finish | +/- 0.002″ | 0.500 to 1, excl |
| Cold Finish | +/- 0.0025″ | 1 to 1.5, excl |
| Cold Finish | +/- 0.003″ | 1.5 to 3.25, incl |
| Cold Finish | +/- 0.005″ | 3.25 to 4, incl |
Stainless Steel Rod Heat Treatment
| Process | Temperature |
|---|---|
| Annealing | 1040–1150 °C |
| Solution Annealing | 1040–1100 °C |
| Hardening | 1000–1050 °C |
| Quenching & Tempering | 1000–1050 °C, quench, temper |
| Stress Relieving | 400–700 °C |
| Cryogenic Treatment | Cool below −190 °C after hardening |
Stainless Steel Round Bars Manufacturing Process
Scrap, ferroalloys and DRI are melted in an Electric Arc Furnace, then refined through AOD/VOD to hit exact chromium, nickel and carbon targets. The molten steel is continuously cast into blooms or billets, reheated and hot rolled or forged into round, hex, square and flat sections. Bars are then annealed and pickled to remove scale and restore the passive layer, cold finished where required (drawn, peeled, turned, centreless ground or polished), and finally tested, marked, bundled and dispatched.
Stainless Steel Bar HSN Code
| Material | HSN Code |
|---|---|
| Stainless Round Bar | 7222 |
Testing & Certification
Every heat is tested before dispatch: tensile and yield, hardness, Charpy impact, bend, intergranular corrosion (ASTM A262 Practice A/E), 100% ultrasonic (ASTM A388 / EN 10308), PMI, spectro chemical analysis, and micro/macro examination.
Documents supplied: EN 10204 3.1 (or 3.2) Mill Test Certificate, raw material test report, third-party inspection by Lloyd’s / SGS / BV / TÜV / DNV on request, Form A / Country of Origin, fumigation certificate and packing list.
Working With SS Round Bar
Cutting — bandsaw for accurate workshop cuts, angle grinder for site work, chop saw for clean square ends, CNC/automatic saw for volume cut-to-length. Always use stainless-dedicated blades and wheels; carbon steel contamination causes surface rusting.
Welding — match the filler to the base metal (ER308L for 304, ER316L for 316), clean and degrease thoroughly, TIG for precision or MIG for speed, keep heat input controlled to avoid sensitisation, then pickle and passivate to restore corrosion resistance.
SS Round Bar Price Per Kg in India
Indicative, ex-Mumbai, subject to nickel/LME movement and USD-INR. Request a live quote for firm pricing.
| Product | INR / kg | USD / kg (UAE) |
|---|---|---|
| SS Round Bar — standard grades (304, 304L) | ₹414 – ₹578 | $20.04 – $27.98 |
| Hot Rolled SS Round Bar | ₹540 | $26.14 |
| Specialty / high-nickel grades (904L, SMO 254, PH) | ₹1,595+ | $77.21+ |
SS Round Bar Applications
Stainless steel round bars go wherever strength, hygiene and corrosion resistance have to coexist:
- Oil & Gas / Petrochemical: Valve stems, pump shafts, fasteners
- Marine & Offshore: Propeller shafts, deck hardware (316, 904L, duplex)
- Pharmaceutical & Chemical Processing: Agitator shafts, reactor internals
- Food, Beverage & Dairy: Conveyor rollers, hygienic machine parts
- Hospital & Medical Equipment: Surgical instruments, orthopaedic components
- Aerospace & Defence: Actuator rods, landing gear parts, precision machined components
- Automotive: Axles, drive shafts, hydraulic cylinders
- Construction & Architecture: Balustrades, structural anchors, dowels
- Power Generation: Turbine components, heat exchanger tie rods
- Textile & Paper: Spindles, guide rollers
Related Products
Round bars in other materials: Super Duplex Steel | Duplex Steel | Monel | Inconel | Hastelloy | Stainless Steel | Carbon Steel | Alloy Steel | Nickel Alloy | Copper Nickel | Nimonic | Titanium | Zirconium | Waspaloy | Nitronic
Other product lines: Stainless Steel Sheets & Plates · Stainless Steel Pipes & Tubes · Stainless Steel Fasteners
Countries We Export Stainless Steel Round Bars To
Get a Quote for Stainless Steel Round Bars
Looking for a trusted Stainless Steel Round Bar manufacturer, supplier and exporter? Jade Alloys supplies premium SS round bars, rods, hex bars, square bars, flat bars, bright bars and precision ground bars in all grades and finishes with complete material test certificates, export documentation and reliable worldwide delivery.
Frequently Asked Questions - Stainless Steel Round Bars
1. What is a stainless steel round bar used for?
2. Is stainless steel 100% rust proof?
3. What is the difference between hot rolled and cold drawn stainless steel round bar?
4. What sizes of SS round bar do you stock?
5. What is the price of stainless steel round bar per kg in India?
6. Which is better for marine use, 304 or 316?
7. Do you provide material test certificates?
8. How do I calculate the weight of a stainless steel round bar?
9. Do you export stainless steel round bars?
