ISO 9001:2015 Certified Manufacturer and Supplier of Stainless Steel Hot Rolled, Cold Drawn, Peeled & Polished, Centerless Ground, Forged, Black, Bright Round Bars.
Premium Stainless Steel Round Bars for Industrial Applications: Stainless Steel Round Bars are a crucial component in industries demanding high strength, corrosion resistance, and superior mechanical properties. Available in a wide range of stainless steel grades, these round bars are used across sectors such as oil & gas, marine, aerospace, chemical processing, power plants, and construction. Designed to perform in high-pressure, high-temperature, and corrosive environments, they offer exceptional durability and reliability for critical applications.
Our SS Round Bars are manufactured as per ASTM A276, ASTM A479, ASME SA276, ASME SA479, and other international standards, ensuring precision, high tensile strength, and excellent surface finish. We offer SS Centerless Ground Round Bars, known for their tight tolerances, improved straightness, and superior machinability, making them ideal for precision components and high-accuracy machining applications. These bars are available in various surface finishes, including black, bright, and polished to meet diverse industry needs.
With diameters ranging from 3mm to 600mm and lengths up to 12 meters, our Stainless Steel Round Bars cater to a broad spectrum of applications. Whether for shafts, fasteners, structural frameworks, or specialized engineering components, our bars ensure optimal performance, ease of fabrication, and long service life. Committed to strict quality control and industry compliance, we deliver reliable, high-performance stainless steel round bars to global markets.
Get SS 304, 304L, 316, 316L, 904L, 15-5 PH, 17-4 PH, 17-7 PH, 13-8 MO Round Bars – Available in 3mm to 600mm Diameter & Custom Lengths Up to 12m.
Stainless Steel Round Bars Specifications
| Specification | Details |
|---|---|
| Standards | ASTM A276, ASTM A479, ASME SA276, ASME SA479, EN 10088-3, JIS G4303, EN 10272, ISO 683-18, DIN 17440, IS 6603, GOST 5949 |
| Grades Available | Austenitic SS 301, 302, 303, 304, 304L, 304H, 309, 309S, 310, 310S, 316, 316L, 316H, 316Ti, 317, 317L, 321, 321H, 347, 347H, 904L. Ferritic SS 405, 409, 409L, 410, 410S, 420, 430, 430F, 434, 436, 439, 441, 444. Martensitic SS 403, 410, 414, 416, 416HT, 420, 420C, 431, 440A, 440B, 440C. Precipitation Hardening SS 15-5 PH, 17-4 PH, 17-7 PH, 13-8 MO. |
| Types | Hot Rolled, Cold Drawn, Peeled & Polished, Centerless Ground, Forged, Black, Bright |
| Size Range (Diameter) | 3mm to 600mm (1/8” to 24”) |
| Length | 3m, 6m, or custom lengths up to 12m |
| Finish | Black, Bright, Polished, Centerless Ground |
| Tolerances | h9, h11, k12, k13, as per customer requirements |
| End Condition | Plain End, Beveled End, Threaded End |
| Manufacturing Process | Hot Rolled, Cold Drawn, Forged, Turned, Precision Machined |
| Heat Treatments | Annealed, Hardened & Tempered, Aged, Magnetic Annealed, Heat Treated |
| Chamfering | 30°C,45°C and 60°C, 0.5 mm to 12 mm depending on the angle |
| Application Industries | Oil & Gas, Petrochemical, Power Generation, Marine, Aerospace, Construction, Automotive, Food Processing, Chemical Processing, Heavy Engineering |
Types of Stainless Steel Round Bars
Hot Rolled Round Bars
Manufactured by hot rolling, offering excellent strength and durability.
Cold Drawn Round Bars
Precision-made with a smooth surface finish, ideal for machining.
Peeled & Polished Round Bars
Enhanced surface finish with high dimensional accuracy
Centerless Ground Round Bars
Extremely precise tolerance with a fine, smooth surface.
Forged Round Bars
High-strength bars for heavy-duty industrial applications.
Bright Round Bars
High-quality, smooth surface bars used in precision applications.
Black Round Bars
Raw, unfinished bars used in industrial applications requiring further processing.
Equivalent of Stainless Steel Round Bars
| Grade | ASTM | UNS | WNR | JIS | EN | BS |
|---|---|---|---|---|---|---|
| 405 | ASTM A276 | S40500 | 1.4002 | SUS 405 | EN 10088-3 | – |
| 409 | ASTM A276 | S40900 | 1.4512 | SUS 409 | EN 10088-3 | – |
| 409L | ASTM A276 | S40910 | 1.4510 | SUS 409L | EN 10088-3 | – |
| 410 | ASTM A276 | S41000 | 1.4006 | SUS 410 | EN 10088-3 | – |
| 410S | ASTM A276 | S41008 | 1.4000 | SUS 410S | EN 10088-3 | – |
| 420 | ASTM A276 | S42000 | 1.4021 | SUS 420 | EN 10088-3 | – |
| 430 | ASTM A276 | S43000 | 1.4016 | SUS 430 | EN 10088-3 | – |
| 430F | ASTM A276 | S43020 | 1.4104 | SUS 430F | EN 10088-3 | – |
| 434 | ASTM A276 | S43400 | 1.4113 | SUS 434 | EN 10088-3 | – |
| 436 | ASTM A276 | S43600 | 1.4510 | SUS 436 | EN 10088-3 | – |
| 439 | ASTM A276 | S43932 | 1.4510 | SUS 439 | EN 10088-3 | – |
| 441 | ASTM A276 | S44100 | 1.4509 | SUS 441 | EN 10088-3 | – |
| 444 | ASTM A276 | S44400 | 1.4521 | SUS 444 | EN 10088-3 | – |
| 15-5 PH | ASTM A564 | S15500 | 1.4545 | – | EN 10088-3 | – |
| 17-4 PH | ASTM A564 | S17400 | 1.4542 | – | EN 10088-3 | – |
| 17-7 PH | ASTM A564 | S17700 | 1.4568 | – | EN 10088-3 | – |
| 13-8 MO | ASTM A564 | S13800 | 1.4534 | – | EN 10088-3 | – |
| 301 | ASTM A276 | S30100 | 1.4310 | SUS 301 | EN 10088-3 | – |
| 302 | ASTM A276 | S30200 | 1.4319 | SUS 302 | EN 10088-3 | – |
| 303 | ASTM A276 | S30300 | 1.4305 | SUS 303 | EN 10088-3 | – |
| 304 | ASTM A276 | S30400 | 1.4301 | SUS 304 | EN 10088-3 | – |
| 304L | ASTM A276 | S30403 | 1.4307 | SUS 304L | EN 10088-3 | – |
| 304H | ASTM A276 | S30409 | 1.4948 | – | EN 10088-3 | – |
| 309 | ASTM A276 | S30900 | 1.4828 | SUS 309 | EN 10088-3 | – |
| 309S | ASTM A276 | S30908 | 1.4833 | SUS 309S | EN 10088-3 | – |
| 310 | ASTM A276 | S31000 | 1.4841 | SUS 310 | EN 10088-3 | – |
| 310S | ASTM A276 | S31008 | 1.4845 | SUS 310S | EN 10088-3 | – |
| 316 | ASTM A276 | S31600 | 1.4401 | SUS 316 | EN 10088-3 | – |
| 316L | ASTM A276 | S31603 | 1.4404 | SUS 316L | EN 10088-3 | – |
| 316H | ASTM A276 | S31609 | 1.4919 | – | EN 10088-3 | – |
| 316Ti | ASTM A276 | S31635 | 1.4571 | SUS 316Ti | EN 10088-3 | – |
| 317 | ASTM A276 | S31700 | 1.4449 | SUS 317 | EN 10088-3 | – |
| 317L | ASTM A276 | S31703 | 1.4438 | SUS 317L | EN 10088-3 | – |
| 321 | ASTM A276 | S32100 | 1.4541 | SUS 321 | EN 10088-3 | – |
| 321H | ASTM A276 | S32109 | 1.4878 | – | EN 10088-3 | – |
| 347 | ASTM A276 | S34700 | 1.4550 | SUS 347 | EN 10088-3 | – |
| 347H | ASTM A276 | S34709 | 1.4961 | – | EN 10088-3 | – |
| 904L | ASTM A276 | N08904 | 1.4539 | SUS 904L | EN 10088-3 | – |
Chemical Composition of SS Round Bars
| Grade | C (Max) | Mn (Max) | Si (Max) | P (Max) | S (Max) | Cr | Ni | Mo | N (Max) | Other Elements |
|---|---|---|---|---|---|---|---|---|---|---|
| 301 | 0.15 | 2.00 | 1.00 | 0.045 | 0.030 | 16.0-18.0 | 6.0-8.0 | – | 0.10 | – |
| 302 | 0.15 | 2.00 | 1.00 | 0.045 | 0.030 | 17.0-19.0 | 8.0-10.0 | – | – | – |
| 303 | 0.15 | 2.00 | 1.00 | 0.20 | 0.15 | 17.0-19.0 | 8.0-10.0 | – | – | S: 0.15 min |
| 304 | 0.08 | 2.00 | 0.75 | 0.045 | 0.030 | 18.0-20.0 | 8.0-10.5 | – | – | – |
| 304L | 0.03 | 2.00 | 0.75 | 0.045 | 0.030 | 18.0-20.0 | 8.0-12.0 | – | – | – |
| 310 | 0.25 | 2.00 | 1.50 | 0.045 | 0.030 | 24.0-26.0 | 19.0-22.0 | – | – | – |
| 316 | 0.08 | 2.00 | 0.75 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | – | – |
| 321 | 0.08 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0-19.0 | 9.0-12.0 | – | – | Ti: 5xC min, 0.7 max |
| 904L | 0.02 | 2.00 | 1.00 | 0.045 | 0.035 | 19.0-23.0 | 23.0-28.0 | 4.0-5.0 | – | Cu: 1.0-2.0 |
| 15-5 PH | 0.07 | 1.00 | 1.00 | 0.035 | 0.030 | 15.0-17.0 | 3.0-5.0 | 0.2-0.6 | – | Nb+Ta 0.15 max |
| 17-4 PH | 0.07 | 1.00 | 1.00 | 0.035 | 0.030 | 15.0-17.0 | 3.0-5.0 | 0.2-0.6 | – | – |
Mechanical Properties of SS Round Bars
| Grade | Tensile Strength (MPa) | Yield Strength (0.2% Proof) (MPa) | Elongation (%) | Hardness (HB Max) |
|---|---|---|---|---|
| 301 | 515-760 | 205 | 40 | 217 |
| 302 | 620 | 275 | 40 | 201 |
| 303 | 620 | 240 | 35 | 212 |
| 304 | 515-750 | 205 | 40 | 201 |
| 304L | 485 | 170 | 40 | 201 |
| 310 | 515 | 205 | 40 | 217 |
| 316 | 515-700 | 205 | 40 | 217 |
| 321 | 515-700 | 205 | 40 | 217 |
| 904L | 490-690 | 220 | 35 | 192 |
| 15-5 PH | 930 | 790 | 10 | 331 |
| 17-4 PH | 930 | 785 | 12 | 363 |
Dimension Table of SS Round Bars
| Nominal Diameter (mm) | Diameter (inches) | Cross-Sectional Area (mm²) | Theoretical Weight (kg/m) |
|---|---|---|---|
| 3 | 1/8″ | 7.07 | 0.06 |
| 4 | 5/32″ | 12.57 | 0.10 |
| 5 | 3/16″ | 19.63 | 0.15 |
| 6 | 1/4″ | 28.27 | 0.22 |
| 8 | 5/16″ | 50.27 | 0.40 |
| 10 | 3/8″ | 78.54 | 0.62 |
| 12 | 1/2″ | 113.10 | 0.89 |
| 14 | 9/16″ | 153.94 | 1.21 |
| 16 | 5/8″ | 201.06 | 1.58 |
| 18 | 11/16″ | 254.47 | 2.00 |
| 20 | 3/4″ | 314.16 | 2.47 |
| 22 | 7/8″ | 380.13 | 2.99 |
| 25 | 1″ | 490.87 | 3.85 |
| 28 | 1-1/8″ | 615.75 | 4.84 |
| 30 | 1-1/4″ | 706.86 | 5.55 |
| 32 | 1-5/16″ | 804.25 | 6.32 |
| 35 | 1-3/8″ | 962.11 | 7.56 |
| 40 | 1-1/2″ | 1256.64 | 9.87 |
| 45 | 1-3/4″ | 1590.43 | 12.49 |
| 50 | 2″ | 1963.50 | 15.41 |
| 55 | 2-3/16″ | 2375.83 | 18.63 |
| 60 | 2-3/8″ | 2827.43 | 22.19 |
| 65 | 2-1/2″ | 3318.30 | 26.06 |
| 70 | 2-3/4″ | 3848.45 | 30.23 |
| 75 | 3″ | 4417.86 | 34.72 |
| 80 | 3-1/8″ | 5026.54 | 39.51 |
| 90 | 3-1/2″ | 6361.73 | 50.00 |
| 100 | 4″ | 7853.98 | 61.62 |
Diameter Tolerances for Stainless Steel Round Bars
ASTM A484 (General Tolerances for SS Bars)
| Nominal Diameter (mm) | Hot Rolled (mm) | Cold Drawn (mm) | Ground & Polished (mm) |
|---|---|---|---|
| Up to 6 mm (1/4″) | ±0.15 | ±0.05 | ±0.02 |
| 6 – 10 mm (1/4″ – 3/8″) | ±0.20 | ±0.08 | ±0.03 |
| 10 – 18 mm (3/8″ – 3/4″) | ±0.25 | ±0.10 | ±0.04 |
| 18 – 30 mm (3/4″ – 1-1/4″) | ±0.30 | ±0.12 | ±0.05 |
| 30 – 50 mm (1-1/4″ – 2″) | ±0.40 | ±0.15 | ±0.06 |
| 50 – 80 mm (2″ – 3-1/8″) | ±0.50 | ±0.20 | ±0.08 |
| 80 – 100 mm (3-1/8″ – 4″) | ±0.80 | ±0.25 | ±0.10 |
| 100 – 150 mm (4″ – 6″) | ±1.20 | ±0.30 | ±0.12 |
| 150 – 200 mm (6″ – 8″) | ±1.50 | ±0.40 | ±0.15 |
ISO 286-2 (IT Grades for Precision Stainless Steel Bars)
| Tolerance Class | Type | Example Diameter Range (mm) | Tolerance (mm) |
|---|---|---|---|
| h6 | High Precision | 10 – 80 | -0.009 to -0.025 |
| h7 | Close Fit | 10 – 80 | -0.015 to -0.035 |
| h8 | Standard Fit | 10 – 80 | -0.022 to -0.052 |
| h9 | Loose Fit | 10 – 80 | -0.036 to -0.087 |
| h10 | General Tolerance | 10 – 80 | -0.043 to -0.108 |
EN 10060 (European Standard for Hot Rolled SS Round Bars)
| Nominal Diameter (mm) | Tolerance (mm) |
|---|---|
| 6 – 30 | ±0.4 |
| 30 – 50 | ±0.5 |
| 50 – 80 | ±0.8 |
| 80 – 100 | ±1.0 |
| 100 – 150 | ±1.3 |
| 150 – 200 | ±1.6 |
Length Tolerances for Stainless Steel Round Bars
| Type | Tolerance |
|---|---|
| Random Length | +100 / -0 mm |
| Fixed Length | ±5 mm |
Worldwide Supply of SS Round Bars
Russia, Bahrain, Cyprus, Egypt, Iran, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Palestine, Qatar, Saudi Arabia, Syria, Turkey, United Arab Emirates (UAE), Yemen, United States of America (USA), Albania, Andorra, Austria, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Montenegro, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Ukraine, United Kingdom, Vatican City.
