Stainless Steel Round Bar (Grades 304, 316L) | Factory Price
Stainless Steel Round Bar (Cold Drawn & Hot Rolled)
- Industrial Grades: 304, 316L, 310S, and Heat-Treatable Grades (420J2, 431, 17-4PH)
- Surface Types: High-Precision Cold Drawn (Bright) and Heavy-Duty Hot Rolled (Peeled)
- Dimensions: Diameters from 1/8" to 6" (Standard length of 6 meters)
- Service Center: Custom Bandsaw Cut-to-Length, MTC included, and Nationwide Shipping
Engineered with consistent internal hardness to extend CNC tool life and ensure perfect finishes.
Industrial Material
Premium Stainless Steel Round Bars for High-Precision CNC Machining
Stainless Steel Round Bars (Solid Bars) are the foundational raw material for mechanical engineering and OEM parts manufacturing. One of the most common challenges in CNC machine shops is dealing with inconsistent material hardness, which rapidly wears down cutting tools (Tool Wear) and ruins the surface finish of the final product.
At Trinity Dynamic, we import premium-grade stainless steel round bars manufactured under strict metallurgical controls. Our bars deliver "Uniform Internal Hardness" throughout their entire length. This guarantees exceptionally smooth machinability, perfect chip-breaking, and significantly extends the lifespan of your expensive CNC cutting tools.
Engineering Guide: Cold Drawn (Bright) vs. Hot Rolled (Peeled) Bars
Selecting the correct manufacturing process for your round bars is crucial for both cost efficiency and precision:
| Features | Cold Drawn (Bright Bar) | Hot Rolled (Peeled / Matte Bar) |
|---|---|---|
| Surface Finish | Smooth, bright, and reflective. | Matte, slightly rough, or peeled surface. |
| Dimensional Tolerance | High Precision (h9 / h11): Zero-plus tolerance, ready for bearing fitment. | Moderate Tolerance: Oversized to allow machinists to mill the surface down. |
| Common Stock Sizes | Small to medium diameters (Up to 4 inches). | Large solid diameters (4 inches and above). |
| Ideal Applications | Motor shafts, bearing assemblies, CNC precision parts, bolts & nuts. | Heavy structural columns, large rollers, heavy-duty gear blanks. |
Technical Specifications
International Standards: ASTM A276 / JIS G4303 / ASTM A484
Available Grades: 304, 304L, 316, 316L, 310S (High Heat), 420J2 (Martensitic), 431, 630 (17-4PH)
Standard Length: 6.0 Meters *Professional bandsaw cut-to-length services available
Typical Mechanical Properties (Grades 304/316L)
| Property | Value (Typical) |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength | ≥ 205 MPa |
| Hardness | ≤ 215 HB (Annealed Condition) |
Standard Weight Chart: Stainless Round Bar (kg per 6-meter length)
| Diameter (Inch) | Diameter (mm) | Estimated Weight (kgs / 6m) |
|---|---|---|
| 1/8" | 3.17 | 0.375 |
| 3/16" | 4.76 | 0.86 |
| 1/4" | 6.35 | 1.50 |
| 5/16" | 7.94 | 2.35 |
| 3/8" | 9.52 | 3.30 |
| 1/2" | 12.70 | 6.00 |
| 5/8" | 15.80 | 9.60 |
| 3/4" | 19.05 | 13.60 |
| 7/8" | 22.22 | 18.60 |
| 1" | 25.40 | 24.20 |
| 1 1/4" | 31.75 | 37.80 |
| 1 1/2" | 38.10 | 54.20 |
| 1 5/8" | 41.20 | 64.00 |
| 1 3/4" | 44.40 | 74.00 |
| 2" | 50.80 | 96.20 |
| 2 1/4" | 57.15 | 122.50 |
| 2 1/2" | 63.50 | 151.20 |
| 3" | 76.20 | 218.00 |
| 3 1/4" | 82.50 | 255.00 |
| 3 1/2" | 88.90 | 296.00 |
| 4" | 101.60 | 388.00 |
| 4 1/2" | 114.30 | 490.00 |
| 5" | 127.00 | 605.00 |
| 5 1/2" | 139.70 | 732.00 |
| 6" | 152.40 | 871.00 |
*Weights provided are theoretical estimates for transportation purposes. Metric millimeter sizes (e.g., 10mm, 12mm, 20mm) are completely stocked. Please consult our sales team for exact sizing.
Common Industrial Applications
- Power Transmission: High-torque motor drive shafts, pump shafts, and agitator axles in industrial mixers.
- Precision Machined Parts: Turned bushings, specialized bolts, nuts, fasteners, and heavy-duty valve stems.
- Food & Pharmaceutical: Machined hygienic components for food processing machinery (Grade 304/316L required).
- Premium Architecture: Luxury door handles, custom handrails, gate mechanisms, and modern furniture legs.
