Steel Round Bars: A Versatile Industrial Essential
Steel round bars are one of the most versatile steel products, used across industries from aerospace to construction. Understanding the available grades, finishes, and properties is essential for optimal material selection.
Common Applications
- CNC Machining: Bright-finished round bars with tight tolerances for precision components
- Shafts and Axles: High-strength alloy steel bars for rotating equipment
- Fasteners and Bolts: Stainless steel bars for corrosion-resistant fastening solutions
- Valve and Pump Components: Nickel alloy bars for extreme service conditions
- Structural Supports: Carbon and alloy steel bars for construction applications
Available Finishes
The surface finish of a round bar significantly affects its machinability, corrosion resistance, and dimensional accuracy:
- Black (Hot Rolled): Mill finish with oxide scale. Most economical, suitable for forging and subsequent machining.
- Bright (Cold Drawn): Smooth, bright surface with close dimensional tolerances. Ideal for direct machining without additional processing.
- Centreless Ground: Precision-ground surface with the tightest tolerances (h6/h7). Used for critical applications requiring exact dimensions.
- Polished: Mirror-like finish for decorative and hygienic applications in food and pharmaceutical industries.
Grade Selection Guide
The right grade depends on your application requirements:
- SS 304/304L: General-purpose corrosion-resistant applications
- SS 316/316L: Marine and chemical environments
- SS 410: Martensitic grade for high-hardness applications (valves, fasteners)
- Monel 400: Excellent for seawater and hydrofluoric acid environments
- Inconel 718: High-temperature, high-strength aerospace components
Stancor Alloys Round Bar Range
We stock round bars from 3mm to 500mm diameter in lengths up to 6 meters. Available in stainless steel, alloy steel, and nickel alloy grades. All bars are supplied with full material traceability and EN 10204 3.1 mill test certificates.