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Help CenterSteel Round Bar & Round Steel Bar，Φ5.5mm ~ Φ300mm
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Steel Round Bar & Round Steel Bar，Φ5.5mm ~ Φ300mmNegotiableMOQ: 5 Metric Tons -
Steel Round Bar & Round Steel Bar，Φ5.5mm ~ Φ300mmNegotiableMOQ: 5 Metric Tons
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Detailed Description of Steel Round Bar
1. Product Name
Steel Round Bar / Round Steel Bar
2. Production Process
Hot Rolled Round BarThe most widely used conventional round bar with a black oxide skin on the surface and moderate dimensional accuracy. It features high cost performance, suitable for general applications such as building structures, machining blanks, steel structure supports, anchor bolts, etc., where high surface precision is not required. It enjoys high production efficiency and stable supply.
Cold Drawn Round BarProcessed by cold drawing, it features high dimensional accuracy, good straightness, bright and clean surface with strict tolerance control. It can be directly used for precision machining, shaft parts, pin shafts, fasteners, hardware accessories, etc., saving part of subsequent processing procedures and improving the qualified rate of finished products.
Forged Round BarFormed by forging, it has denser and more uniform internal structure without defects such as porosity and blowholes, with better mechanical properties, higher strength and toughness. It is mainly used for key mechanical parts, spindles of heavy equipment, flange blanks and other high-load and high-demand large-diameter components.
3. Common Materials
Carbon Structural SteelTypical materials: Q235, Q235B, S235JR, A36Features: Good plasticity, excellent weldability and economical priceApplications: Construction engineering, general steel structures, embedded parts, anchor bolts, brackets, general structural parts
High-quality Carbon Structural SteelTypical materials: 20#, 35#, 45#, 1020, 1045Features: Good comprehensive mechanical properties, heat treatable such as quenching and temperingApplications: Machining, shaft parts, gear blanks, connecting rods, keys, various transmission parts
High-strength Low-alloy SteelTypical materials: Q355, S355JR, 16MnFeatures: Higher strength than ordinary carbon steel, better corrosion resistance and bearing capacityApplications: Heavy steel structures, engineering machinery, vehicle frames, load-bearing support structures
Alloy Structural SteelTypical materials: 40Cr, 42CrMo, 20CrMnTi, 35CrMoFeatures: Outstanding high strength, high toughness, wear resistance and fatigue resistanceApplications: High-strength shafts, gears, high-strength bolts, quenched and tempered parts, key components of mining machinery and automobiles
4. Specification Range
Diameter RangeHot rolled round bar: Φ5.5mm ～ Φ300mmCold drawn round bar: Φ4mm ～ Φ80mmForged round bar: Φ80mm ～ Φ500mm and above
Common Diameter SizesΦ8, Φ10, Φ12, Φ14, Φ16, Φ18, Φ20, Φ22, Φ25, Φ28, Φ30, Φ32, Φ35, Φ40, Φ45, Φ50, Φ60, Φ70, Φ80, Φ90, Φ100mm
Length SpecificationsRandom length: 5.5m - 7mFixed length: 6m, 9m, 12mCustom cutting available: length cutting and sectional processing can be made according to customer requirements
5. Execution Standards
GB: GB/T 702 Hot-rolled steel bars — Dimensions, shape, weight and tolerancesASTM: ASTM A36, ASTM A108, ASTM A29EN: EN 10025JIS: JIS G4051
6. Surface Condition
Black SurfaceOriginal hot-rolled surface with mill scale, dark gray in appearance, low production cost, suitable for structural parts and machining blanks without special surface requirements.
Bright SurfaceTreated by cold drawing, peeling or fine grinding, with high surface finish and accurate dimensions, suitable for precision machining and parts with high appearance requirements.
7. Main Application Fields
Widely used in construction engineering, machinery manufacturing, hardware processing, auto parts, engineering machinery, mold manufacturing, mining equipment and other industries. It can be used to manufacture various shafts, gears, pin shafts, bolts and nuts, steel structure supports, embedded parts, frames, flange blanks and other components, with a wide range of applications and strong versatility.
8. Packaging, Delivery & Lead Time
Packaging MethodPacked tightly with steel strips. Moisture-proof packaging can be added according to transportation needs to prevent rust, scattering or collision damage during transportation.
Delivery ConditionVarious delivery conditions are available, including hot rolled, cold drawn, annealed, normalized, quenched and tempered, to meet different processing and application requirements.
Delivery TimeFor regular in-stock orders, shipment will be arranged within 5–7 days after payment, with stable and efficient supply.
Delivery ModeSupports ex-factory delivery and port delivery. Logistics distribution can be arranged to the designated location according to customer requirements, suitable for domestic sales and foreign trade export business.
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