Round Bars
Round bar and rod for shafts, machining and fasteners — hot-rolled and bright (cold-finished) in carbon, alloy, stainless and duplex grades.
Technical specification
| Parameter | Specification |
|---|---|
| Product | Hot-rolled & bright (cold-finished) bars — round, square, hex, flat |
| Dimensional standard | EN 10060 (round) · 10059 (square) · 10058 (flat) · 10061 (hex) |
| Finish | Hot-rolled · cold-drawn · ground · peeled |
| Tolerance | h9 / h11 (bright bar) · product-standard (hot-rolled) |
| Size range | 5 – 250 mm |
| Material specifications | ASTM A276, A479, A582, A29 · EN 10088-3 / 10083 |
| Condition | Annealed · solution-annealed · quenched & tempered |
| Documentation | EN 10204 3.1 / 3.2, PMI |
How it is made
Bars are hot-rolled or forged from bloom/billet, then optionally cold-finished — cold-drawn, centreless-ground or turned/peeled — for close tolerance (h9/h11) and a bright surface. Stainless is solution annealed and pickled; free-machining 303 has controlled sulphur for machinability; alloy steels are quenched & tempered to the required condition. Because carbon and alloy bar mechanicals depend on the heat-treatment condition and section size, those values are given as typical for the condition and confirmed on the MTC; stainless and duplex bar carry the ASTM A276/A479 specification minima.
Grades & materials
All grades supplied for this product family, with representative chemistry. Exact grade, class and condition are confirmed per order.
| Material family | Grades | UNS | Standard | Service |
|---|---|---|---|---|
| Austenitic stainless | A276/A479 304, 304L, 316, 316L, 321, 310, 347 | — | ASTM A276 / A479 | Corrosion |
| Free-machining SS | A582 303, 303Se | S30300 | ASTM A582 | Machined parts |
| Martensitic SS | A276 410, 420, 431 | — | ASTM A276 | Wear / strength |
| Duplex / super duplex | A276/A479 S31803 (2205), S32750 (2507) | — | ASTM A276 / A479 | Chloride / sour |
| Alloy steel | 4140, 4340, EN19, EN24 | — | ASTM A29 / EN 10083 | High strength |
| Carbon steel | EN8, EN9, 1045, EN1A (bright) | — | ASTM A29 / EN | General engineering |
| Nickel alloys | B446/B637 (625, 718) | — | ASTM | Severe corrosion |
Chemical composition (representative)
| Grade | C | Mn | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|
| A276 304 | 0.08 max | 2.00 max | 18.0–20.0 | 8.0–10.5 | — | — |
| A276 316 | 0.08 max | 2.00 max | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | — |
| A582 303 | 0.15 max | 2.00 max | 17.0–19.0 | 8.0–10.0 | — | S 0.15 min |
| A276 410 | 0.08–0.15 | 1.00 max | 11.5–13.5 | — | — | — |
| A276 S31803 (2205) | 0.030 max | 2.00 max | 21.0–23.0 | 4.5–6.5 | 2.5–3.5 | N 0.08–0.20 |
| 4140 (alloy) | 0.38–0.43 | 0.75–1.00 | 0.80–1.10 | — | 0.15–0.25 | — |
Standards & specifications
Dimensional & product
- EN 10060/10059/10058/10061 round/square/flat/hex
- ASTM A276/A479 stainless bars
- ASTM A582 free-machining SS
- ASTM A29 / EN 10083 carbon & alloy
Finish & tolerance
- Hot-rolled or bright (cold-drawn/ground/peeled)
- Tolerance h9/h11 for bright bar
- Straightness and surface per order
- Condition (annealed / QT) per grade
Mechanical properties (representative grades)
Representative grades — full MTC values on request. Values are ASTM/ASME specification minima or ranges at room temperature.
| Grade | Condition | Tensile (MPa) | Yield min (MPa) | Elong min (%) | Hardness |
|---|---|---|---|---|---|
| 304 / 304L | Annealed | 515 / 485 | 205 / 170 | 40 | ≤ 201 HBW |
| 316 / 316L | Annealed | 515 / 485 | 205 / 170 | 40 | ≤ 217 HBW |
| 321 | Annealed | 515 | 205 | 40 | ≤ 217 HBW |
| 310 | Annealed | 515 | 205 | 40 | ≤ 217 HBW |
| 347 | Annealed | 515 | 205 | 40 | ≤ 201 HBW |
| 303 (free-machining) | Annealed | 515 | 205 | 35 | ≤ 262 HBW |
| 410 | Annealed | 450 | 205 | 20 | ≤ 217 HBW |
| 410 | Q & T | 620 | 415 | 15 | — |
| 431 | Q & T | 795 | 620 | 15 | — |
| S31803 (2205) | Solution annealed | 620 | 450 | 25 | ≤ 293 HBW |
| S32750 (2507) | Solution annealed | 795 | 550 | 15 | ≤ 310 HBW |
| 1045 carbon | Hot-rolled (typical) | 570–700 | 310 | 16 | 170–210 HBW |
| 4140 alloy | Q & T (typical) | 850–1000 | 650 | 12 | 28–34 HRC |
| 4340 alloy | Q & T (typical) | 930–1080 | 740 | 10 | 30–36 HRC |
Testing, inspection & documentation
| Test / document | Detail |
|---|---|
| Chemical / PMI | Composition to the spec; PMI on stainless/alloy |
| Tensile | Tensile, yield and elongation per grade/condition |
| Hardness | Brinell/Rockwell per grade and condition |
| Corrosion | IGC per ASTM A262 (austenitic) where specified |
| Ultrasonic | For larger sections where required |
| Certification | EN 10204 3.1 as standard; 3.2 with third-party endorsement |
Applications & industries served
Available forms, sizes & range
Provide with your enquiry
- Section and size (dia / across-flats / width×thk).
- Material grade and condition.
- Finish (hot-rolled / bright) and tolerance.
And the commercial detail
- Length and cutting tolerance.
- Standard and required tests.
- Quantity and any drawing or BOQ.
Frequently asked questions
Hot-rolled or bright round bar?
Hot-rolled bar suits general fabrication; bright (cold-drawn/ground) bar gives close tolerance (h9/h11) and a smooth surface for direct machining or fitting.
What sizes and grades?
Roughly 5–250 mm diameter in stainless, duplex, alloy and carbon grades, cut to length, with condition and tests per order.
What tolerance can I get?
Bright bar to h9/h11 (or as specified); hot-rolled to the product-standard tolerance.
Request a quote
Send your requirement to Sagiant Piping Industries and our team responds with grade, material selection, availability and pricing for round bars. Attach a BOQ, line list or drawing for a faster, more accurate quotation.
- Fast RFQ response with grade & material-selection support
- EN 10204 3.1 / 3.2 certification, PMI & third-party inspection
- BOQ & line-list project supply — India & export
Mechanical & chemical values shown are ASTM/ASME specification figures; certified heat-specific values appear on the MTC. Availability is confirmed with the quotation.
