Stainless steel round bars are solid cylindrical long products used in a wide range of structural, mechanical, and industrial applications. Their uniform cross-section, strength, and corrosion resistance make them suitable for components that require machining, forming, and reliable dimensional stability. Round bars are available in various diameters and surface conditions, allowing them to be used in both precision engineering and heavy-duty industrial environments.
Stainless steel round bars are supplied as solid rods produced through hot rolling, cold drawing, or centerless grinding, depending on required tolerances and surface finish.
They offer:
Consistent diameter along full length
High machinability (depending on finish)
Strong structural properties
High resistance to corrosion and wear
Compatibility with turning, milling, drilling, threading, and forming processes
These characteristics make round bars suitable for both general engineering tasks and precision-machined components.
Produced directly from hot-rolled billets.
Suitable for structural and heavy mechanical applications
Standard tolerances
Matte, scale-free surface after pickling
Produced by cold drawing or peeling/grinding processes.
Improved diameter tolerance
Better straightness
Smooth surface finish
Ideal for precision parts and machining
Final surface is ground to precise tolerances.
Excellent dimensional accuracy
Very smooth surface
Common in precision shafts and high-tolerance components
Round bars can be supplied in different surface finishes depending on end-use:
Hot Rolled / Pickled – Standard industrial finish
Cold Drawn – Smooth, clean finish suitable for machining
Peeled / Turned – Outer layer removed for uniform diameter
Centerless Ground – Precision finish for high-tolerance components
Polished – Decorative or visible applications requiring aesthetic surfaces
Typical availability includes:
Diameter: 3 mm to 300 mm (or imperial equivalents)
Length: 3 m, 4 m, 6 m (standard); custom cutting available
Tolerances: According to finishing method (hot-finished vs cold-finished)
Form: Straight lengths (not coiled)
These dimensions cover everything from small machined components to large structural elements.
Stainless steel round bars are used in numerous sectors due to their stability, strength, and corrosion resistance. Common application fields include:
Machined components (shafts, pins, fasteners, valves, fittings)
Mechanical engineering
Automotive and transportation parts
Food and beverage machinery
Construction and structural elements
Pump shafts and motor components
Marine hardware
Aerospace and precision equipment
General fabrication and maintenance work
Areas requiring both reliability and machinability rely heavily on stainless round bar.
Excellent corrosion resistance
Strong mechanical stability
High durability in harsh environments
Suitable for machining and forming
Available in many diameters and finishes
Long service life with minimal maintenance
These benefits make stainless round bars one of the most widely used stainless long products globally.
ASTM A276 – Covers stainless steel bars (hot-finished or cold-finished) for general mechanical and structural use.
ASTM A479 – Stainless steel bars and rods for boiler, heat exchanger, and pressure-related service conditions.
ASTM A484 – General requirement specification for tolerances, straightness, surface conditions, and mechanical properties of stainless steel bars.
ASTM A582 – Standard for free-machining stainless bars used when improved machinability is required.
EN 10088-3 – European standard for stainless long products, defining dimensional tolerances and mechanical property requirements for round bars.
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