Reninox Steel is a trusted manufacturer, supplier, and stockist of premium-quality Stainless Steel 321 and 321H Round Bars & Rods, engineered to meet the most demanding industrial applications. Known for exceptional resistance to intergranular corrosion and high-temperature stability, these grades are widely used in industries such as petrochemical, aerospace, power generation, and heat exchangers.
Our Stainless Steel 321/321H Round Bars are stabilized with titanium, ensuring superior performance in environments exposed to elevated temperatures and oxidation. Reninox Steel ensures strict quality control, precision manufacturing, and adherence to international standards to deliver reliable and durable products.
The addition of titanium in SS 321 Square Bars helps prevent carbide precipitation during welding, making it highly resistant to intergranular corrosion. Meanwhile, SS 321H Flat Bar, with its higher carbon content, provides enhanced creep resistance and strength at elevated temperatures. These properties make them ideal for applications such as heat exchangers, furnace components, and exhaust systems.
Because of its high mechanical qualities, the ASTM A276 Stainless Steel 321 Hex Bars can be used in thermal oxidizers, chemical process equipment, exhaust manifolds, and other applications. Similar to the 321 stainless steel round bar, it is beneficial in a number of industrial areas due to its strong intergranular corrosion resistance.
The Stainless Steel 321/321H Bright Bar are highly sought after by industries that need exceptional corrosion and heat resistance. The titanium-stabilized austenitic stainless-steel method used to make these bars operates exceptionally well at high temperatures.
| Dimensions | DIN, EN, ASTM, JIS, ASME, BS, AISI |
| Standard | ASTM A479, ASTM A276, AMS 5511, AMS 5513, AMS 5647 |
| Hex Bar size | 2-100mm A/F |
| Round bar size | Diameter: 3-~800mm |
| Flat bar size | Thickness: 2 -100mm |
| Width: 10 to 500mm | |
| Angle bar size | 3mm*20mm*20mm~12mm*100mm*100mm |
| Square bar size | 4 to 100mm |
| Channel Bar | 80 x 40mm to 150 x 75mm section; 5.0 to 6.0mm thickness |
| Rectangular Bars Section | 3.0 to 12.0mm thickness |
| Threaded Bar Billet Size | 1/2 to 495mm Diameter |
| Rectangles Size | 33 x 30mm to 295 x 1066mm |
| Hollow Bar | 32mm OD x 16mm ID to 250mm OD x 200mm ID) |
| Tolerance | H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients’ requirements |
| Finish | Cold (bright) drawn, centreless ground, hot rolled, smooth turned, peeled, slit rolled edge, hot rolled annealed, Rough Turned, Bright, Polish, Grinding, Centreless Ground & Black |
| Surface | Hot Rolled Pickled, Bright, Sand Blasting Finished, Cold Drawn, Hairline,Polished |
| Condition | Hardened & tempered, annealed |
| Technique | Cold Drawn, Hot Rolled, Forged Round Bar,Cold Rolled, Rod |
| Processing | Bar cutting to 650mm |
| Form | Rod, Round, Channel Bar, T-Bar, Flat Bar, Precision Ground Bar, Blocks, Square, Rings, Round Rod, Triangle, Hollow, Rectangle, Threaded, Hex (A/F), Profiles, Half Round Bar, Ingot, Billet, I/H Bar, Forging etc. |
| STANDARD | UNS | WNR. | JIS | EN |
|---|---|---|---|---|
| SS 321 | S32100 | 1.4541 | SUS 321 | X6CrNiTi18-10 |
| SS 321H | S32109 | 1.4878 | SUS 321H | X12CrNiTi18-9 |
| % | Cr | Ni | C | Si | Mn | P | S | N | Ti | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| 321 | min:17.0 max:19.0 |
min: 9.0 max:12.0 |
max:0.08 | max:0.75 | max:2.0 | max:0.045 | max:0.03 | max:0.10 | min:5*(C+N) max:0.70 |
Balance |
| 321H | min:17.0 max:19.0 |
min: 9.0 max:12.0 |
min:0.04 max:0.10 |
min:18.0 max:20.0 |
max:2.0 | max:0.045 | max:0.03 | max:0.10 | min:5*(C+N) max:0.70 |
Balance |
| Grade | Tensile Strength ksi (min.) |
Yield Strength 0.2% Offset ksi (min.) |
Elongation - % in 50 mm (min.) |
Hardness (Brinell) MAX |
|---|---|---|---|---|
| 321/321H | 75 | 30 | 40 | 217 |
| Diameter or Width (mm) |
Weight per meter | Sectional Area | Perimeter | |||
|---|---|---|---|---|---|---|
| Square (kg) |
Round (kg) |
Square (cm²) |
Round (cm²) |
Square (cm) |
Round (cm) |
|
| 5.0 | 0.20 | 0.15 | 0.25 | 0.20 | 2.0 | 1.57 |
| 5.5 | 0.24 | 0.19 | 0.30 | 0.24 | 2.2 | 1.78 |
| 6.0 | 0.28 | 0.22 | 0.36 | 0.28 | 2.4 | 1.88 |
| 7.0 | 0.38 | 0.30 | 0.49 | 0.38 | 2.8 | 2.20 |
| 8.0 | 0.50 | 0.39 | 0.64 | 0.50 | 3.2 | 2.51 |
| 9.0 | 0.64 | 0.50 | 0.81 | 0.64 | 3.6 | 2.83 |
| 10 | 0.73 | 0.63 | 1.00 | 0.79 | 4.0 | 3.14 |
| 11 | 0.95 | 0.75 | 1.21 | 0.95 | 4.4 | 3.46 |
| 12 | 1.13 | 0.89 | 1.44 | 1.13 | 4.8 | 3.77 |
| 14 | 1.54 | 1.21 | 1.96 | 1.54 | 5.6 | 4.40 |
| 16 | 2.01 | 1.58 | 2.56 | 2.01 | 6.4 | 5.03 |
| 18 | 2.54 | 2.00 | 3.24 | 2.54 | 7.2 | 5.65 |
| 20 | 3.14 | 2.47 | 4.00 | 3.14 | 8.0 | 6.28 |
| 22 | 3.80 | 2.98 | 4.84 | 3.80 | 8.8 | 6.91 |
| 25 | 4.91 | 3.85 | 6.25 | 4.91 | 10.0 | 7.85 |
| 28 | 6.15 | 4.83 | 7.84 | 6.16 | 11.2 | 8.80 |
| 32 | 8.04 | 6.31 | 10.24 | 8.04 | 12.8 | 10.05 |
| 36 | 10.17 | 7.99 | 12.96 | 10.18 | 14.4 | 11.31 |
| 40 | 12.56 | 9.86 | 16.00 | 12.57 | 16.0 | 12.57 |
| 45 | 15.90 | 12.49 | 20.25 | 15.90 | 18.0 | 14.14 |
| 50 | 19.62 | 15.41 | 25.00 | 19.64 | 20.0 | 15.71 |
| 56 | 24.62 | 19.34 | 31.36 | 24.63 | 22.4 | 17.59 |
| 63 | 31.16 | 24.47 | 36.69 | 31.17 | 25.2 | 19.79 |
| 71 | 39.57 | 31.08 | 50.41 | 39.59 | 28.4 | 22.31 |
| 80 | 50.24 | 39.46 | 64.00 | 50.27 | 32.0 | 25.13 |
| 321/321H SS Round Bar Grade | 321/321H SS Round Bar Dimensions | 321/321H SS Round Bar Price |
| 321/321H SS Round Bar | 0.1-500mm | US $600.00-$2600.00 / Ton |
| 321/321H SS Round Bar | 5.5mm-500mm | US $600.00-$3600.00 / Ton |
| 321/321H SS Round Bar | 3mm-800mm | US $500.00-$3000.00 / Ton |
| 321/321H SS Round Bar | 5mm-300mm | US $1200.00-$3150.00 / Ton |
| 321/321H SS Round Bar | 2mm-300mm | US $600.00-$2600.00 / Ton |
| Round bar Cutting | Products cut include Round bars, Flat bars, Hex bars, Square bars, Tubing and Hollow bars, Pipe, Angles, channels, Beams and Tees. Thickness range is 1/16″ to 28″ diameter |
| Round bar Production Cutting | We can provide production cutting for product diameters up to 4″. We utilize Amanda Production Equipment to achieve these precision cuts with tight tolerances. |
| Round bar Polishing | Products polished included all tubular products, with OD & ID polishing available, Round bars, Square bars, Hex & Flat bars, Angles, Uneven Leg Angles, beams, and other shapes. |
| SRE | Slit rolled edge | BD | Bright drawn |
| RT | Rough turned/peeled | P&T | Peeled and turned |
| PR | Peeled and reeled | ST | Smooth turned |
| HRAP | Hot rolled annealed and pickled | CF | Cold finished |
| P | Polished | CD | Cold drawn |
| HF | Hot finished | CG | Centreless ground |
| US Bar | Metric | Japanese | Canadian/ASTM | ||||
|---|---|---|---|---|---|---|---|
| Diameter(Inch) | Bar Size | Diameter (millimeter) | Bar Size | Diameter (millimeter) | Bar Size | Diameter (millimeter2) | Bar Size |
| 0.250 | #2 | 5 | 5 | 6 | 6 | 100 | 10M |
| 0.375 | #3 | 5.5 | 5.5 | 10 | 10 | 200 | 15M |
| 0.500 | #4 | 6 | 6 | 13 | 13 | 300 | 20M |
| 0.625 | #5 | 7 | 7 | 16 | 16 | 500 | 25M |
| 0.750 | #6 | 8 | 8 | 19 | 19 | 700 | 30M |
| 0.875 | #7 | 9 | 9 | 22 | 22 | 1000 | 35M |
| 1.000 | #8 | 10 | 10 | 25 | 25 | 1500 | 45M |
| 1.125 | #9 | 11 | 11 | 29 | 29 | 2500 | 55M |
| 1.250 | #10 | 12 | 12 | 32 | 32 | ||
| 1.375 | #11 | 14 | 14 | 35 | 35 | ||
| 1.500 | #12 | 16 | 16 | 38 | 38 | ||
| 1.625 | #13 | 18 | 18 | 41 | 41 | ||
| 1.750 | #14 | 20 | 20 | 44 | 44 | ||
| 1.875 | #15 | 22 | 22 | 48 | 48 | ||
| 2.000 | #16 | 25 | 25 | 51 | 51 | ||
| 2.250 | #18 | 28 | 28 | 57 | 57 | ||
| 32 | 32 | ||||||
| 36 | 36 | ||||||
| 40 | 40 | ||||||
| 44 | 44 | ||||||
| 50 | 50 | ||||||
| Weight | Dia | Weight | Dia |
|---|---|---|---|
| per metre (kg) | (mm) | per metre (kg) | (in) |
| 0.10 | 4mm | 0.14 | 3/16" |
| 0.06 | 3mm | 0.06 | 1/8" |
| 0.22 | 6mm | 0.39 | 5/16" |
| 0.16 | 5mm | 0.25 | 1/4" |
| 0.30 | 7mm | 0.56 | 3/8" |
| 0.62 | 10mm | 1.00 | 1/2" |
| 0.40 | 8mm | 0.77 | 7/16" |
| 0.89 | 12mm | 1.22 | 9/16" |
| 1.40 | 15mm | 1.89 | 11/16" |
| 3.88 | 25mm | ||
| 1.22 | 14mm | 1.56 | 5/8" |
| 2.01 | 18mm | 3.07 | 7/8" |
| 1.59 | 16mm | 2.25 | 3/4" |
| 3.00 | 22mm | ||
| 2.48 | 20mm | 4.03 | 1" |
| 3.57 | 24mm |
| SS Square bar – metric sizes and weights | |||
|---|---|---|---|
| Square bar Size | KG’s per Metre | Standard Length (metres) | Colour Code |
| 12 x 12 | 1.16 | 6.0 | Pink |
| 10 x 10 | 0.81 | 6.0 | Yellow |
| 20 x 20 | 3.22 | 6.0 | Green |
| 40 x 40 | 12.8 | 6.0 | Yellow |
| 16 x 16 | 2.06 | 6.0 | Grey |
| 32 x 32 | 8.24 | 6.0 | Orange |
| 25 x 25 | 5.03 | 6.0 | Purple |
| 50 x 50 | 20.12 | 6.0 | Green |
| Size in Inches | Wt per inch | Wt per Ft |
|---|---|---|
| 1/4″ | 2.160 | 0.180 |
| 3/16″ | 1.248 | 0.104 |
| 3/8″ | 4.920 | 0.420 |
| 5/16″ | 3.480 | 0.290 |
| 1/2″ | 8.880 | 0.740 |
| 7/16″ | 6.72 | 0.560 |
| 5/8″ | 13.80 | 1.150 |
| 9/16″ | 11.16 | 0.930 |
| 3/4″ | 19.92 | 1.660 |
| 11/16″ | 16.68 | 1.390 |
| 7/8″ | 27.60 | 2.300 |
| 13/16″ | 23.40 | 1.950 |
| 1″ | 34.80 | 2.90 |
| 15/16″ | 31.20 | 2.600 |
| 1-1/8″ | 44.40 | 3.700 |
| 1-1/16″ | 39.60 | 3.30 |
| 1-5/16″ | 61.20 | 5.100 |
| 1-1/4″ | 55.20 | 4.600 |
| 1-7/16″ | 73.20 | 6.100 |
| 1-3/8″ | 67.20 | 5.600 |
| 1-5/8″ | 93.60 | 7.800 |
| 1-1/2″ | 79.20 | 6.600 |
| 1-7/8″ | 124.80 | 10.400 |
| 1-3/4″ | 108.36 | 9.030 |
| 2-1/4″ | 179.04 | 14.920 |
| 2″ | 141.60 | 11.80 |
| 2-1/2″ | 221.04 | 18.42 |
| 2-3/8″ | 203.04 | 16.920 |
| 3″ | 318.36 | 26.53 |
| Size (inch) | sizes in mm | Thickness (in Inches) | Thickness (mm) |
|---|---|---|---|
| 1 | 25 | 3/16 to 4/5 | 5 to 20 |
| 7/8 | 22 | 2/3 to 5/7 | 17 & 18 |
| 1-1/4 | 32 | 1/4 to 4/5 | 6 to 20 |
| 1-3/16 | 30 | 3/16 to 4/5 | 5 to 20 |
| 1-4/7 | 40 | 3/16 to 1 | 5 to 25 |
| 1-3/8 | 35 | 3/16 to 3/16 | 5 to 20 |
| 1-6/7 | 47 | 2/3, 1 & 1-1/4 | 17,25 & 32 |
| 1-7/9 | 45 | 3/16 to 1 | 5 to 25 |
| 2-1/16 | 55 | 3/16 to 1 | 5 to 25 |
| 2 | 50 | 3/16 to 1-1/4 | 5 to 32 |
| 2-3/8 | 60 | 3/16 to 1-3/8 | 5 to 35 |
| 2-1/4 | 57 | 1-1/4 | 32 |
| 2-5/9 | 65 | 3/8 to 1-3/16, & 1-3/8 | 10 to 30 & 35 |
| 2-1/2 | 63 | 3/8 to 1-3/16 | 10 to 30 |
| 3 | 75 | 5/16 to 1 | 8 to 25 |
| 2-3/4 | 70 | 1/4 to 1, & 1-4/7 | 6 to 25 & 40 |
| 3-1/2 | 90 | 5/16- 4/5 | 8 to 20 |
| 3-1/8 | 80 | 5/16 to 4/5 | 8 to 20 |
| 4 | 100 | 5/16, 3/8, 1/2 | 8, 10, 12 |
| Diameter | Weight Chart | Dia | Weight Chart |
|---|---|---|---|
| (mm) | per metre (kg) | (in) | per metre (kg) |
| 3mm | 0.06 | 1/8″ | 0.06 |
| 4mm | 0.10 | 3/16″ | 0.14 |
| 5mm | 0.16 | 1/4″ | 0.25 |
| 6mm | 0.22 | 5/16″ | 0.39 |
| 7mm | 0.30 | 3/8″ | 0.56 |
| 8mm | 0.40 | 7/16″ | 0.77 |
| 10mm | 0.62 | 1/2″ | 1.00 |
| 12mm | 0.89 | 9/16″ | 1.22 |
| 14mm | 1.22 | 5/8″ | 1.56 |
| 15mm | 1.40 | 11/16″ | 1.89 |
| 16mm | 1.59 | 3/4″ | 2.25 |
| 18mm | 2.01 | 7/8″ | 3.07 |
| 20mm | 2.48 | 1″ | 4.03 |
| 22mm | 3.00 | ||
| 24mm | 3.57 | ||
| 25mm | 3.88 |
| Standard | Description |
|---|---|
| ASTM A276 | Standard Specification for Stainless Steel Bars and Shapes |
| ASTM A314 | Standard Specification for Stainless Steel Billets and Bars for Forging |
| ASTM A493 | Standard Specification for Stainless Steel Wire and Wire Rods for Cold Heading and Cold Forging |
| ASTM A564 | Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes |
| ASTM A565 | Standard Specification for Martensitic Stainless Steel Bars, Forgings, and Forging Stock for High-Temperature Service |
| ASTM A582 | Standard Specification for Free-Machining Stainless Steel Bars |
| ASTM A666 | Standard Specification for Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate, and Flat Bar |
| ASTM A484 | Standard Specification for General Requirements for Stainless and Heat-Resisting Bars, Billets, and Forgings |
| ASTM A479 | Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels |