Contact Platform Support
Help CenterSteel Round Ba & Steel Round Bar，45#、Q235、40Cr、4140、42CrMo
Related Products
-
Steel Round Ba & Steel Round Bar，45#、Q235、40Cr、4140、42CrMoNegotiableMOQ: 5 Metric Tons -
Steel Wire Rope & Galvanized Steel Strand，1720MPa, 1860MPa, 1960MPa, 2000MPa, 2160MPaNegotiableMOQ: 5 Metric Tons
-
Steel Wire Rope & Galvanized Steel Strand，1720MPa, 1860MPa, 1960MPa, 2000MPa, 2160MPaNegotiableMOQ: 5 Metric Tons
-
Steel Wire Rope & Galvanized Steel Strand，1720MPa, 1860MPa, 1960MPa, 2000MPa, 2160MPaNegotiableMOQ: 5 Metric Tons
-
Steel Channel & Galvanized Channel Steel，Q235B、Q355B、SS400、S235JR、S355JR，GB/T 707、JIS、ASTM、ENNegotiableMOQ: 5 Metric Tons
Detailed Product Description of Round Steel Bars
Product Name: Round Steel Bar / Solid Round Steel
1. Scope of Application & Standards
Scope: Solid steel bars with round cross-section, widely used in construction, machinery manufacturing, auto parts, hardware processing, molds and other general engineering fields.
Standards:
GB/T 702-2017 Hot-rolled round and square steel — Dimensions, shape, weight and tolerances
GB/T 699 High-quality carbon structural steels
GB/T 3077 Alloy structural steels
GB/T 1591 High-strength low-alloy structural steels
2. Product Categories
Hot-rolled Round Steel Bars
Surface: Black oxide skin, hot-rolled condition
Diameter: Φ5.5mm – Φ250mm
Features: High productivity, low cost, general-purpose
Cold-drawn Round Steel Bars
Surface: Bright and smooth, high dimensional accuracy
Diameter: Φ3.0mm – Φ100mm
Features: Tight tolerance, good straightness, suitable for direct machining
Forged Round Steel Bars
Process: Forged forming, dense internal structure
Diameter: Φ80mm – Φ350mm
Features: Excellent mechanical properties, for heavy-duty key components
3. Main Material Grades
Carbon Structural Steels
Q235B: Good plasticity and weldability, used for construction, supports, general parts
Q355B (formerly Q345B): High strength, for load-bearing structures, machinery frames
High-quality Carbon Structural Steels
20#: Low carbon, good weldability, used for sleeves, small gears, fasteners
45#: Medium carbon, excellent comprehensive mechanical properties after quenching and tempering, widely used for shafts, connecting rods, bolts
65Mn: High carbon manganese steel, good elasticity and wear resistance, for springs and wear parts
Alloy Structural Steels
40Cr: High strength, wear-resistant, fatigue-resistant, for important shafts, gears, crankshafts
42CrMo: High toughness, good hardenability, high-temperature resistance, for heavy machinery, pressure vessel parts
GCr15: Bearing steel, high hardness and wear resistance, for bearings, sleeves, precision wear parts
4. Specifications & Weight
Diameter: Φ6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm up to Φ250mm
Length: 6m, 9m, 12m fixed length; customized length available
5. Surface & Quality Requirements
Surface free from cracks, folds, scars, inclusions and other harmful defects
Delivery conditions: Hot-rolled (black), cold-drawn (bright), annealed, normalized, quenched and tempered
6. Applications
Construction: Stirrups, embedded parts, tie bars, steel structure connectors
Machinery: Transmission shafts, gears, nuts and bolts, flanges, mold blanks
Automotive: Crankshafts, half shafts, connecting rods, fasteners, chassis parts
Hardware & Tools: Standard parts, cutting tools, measuring tools, various supports
Mining & Petroleum Equipment: High-strength wear-resistant structural parts
7. Packaging, Transportation & Delivery
Packaging: Bundled with steel strips, clearly labeled with grade, specification, heat number and weight
Transportation: Moisture-proof, avoid collision and deformation
Delivery Time: 5–7 working days for regular sizes in stock; customized sizes to be negotiated
Send Inquiry to This Supplier
You May Also Like
-
Steel Channel & Galvanized Channel Steel，Q235B、Q355B、SS400、S235JR、S355JR，GB/T 707、JIS、ASTM、ENNegotiableMOQ: 5 Metric Tons
-
Steel Channel & Galvanized Channel Steel，Q235B、Q355B、SS400、S235JR、S355JR，GB/T 707、JIS、ASTM、ENNegotiableMOQ: 5 Metric Tons
-
Steel Billet & Semi-Finished Steel Billet，Q235B、Q195、SS400、Q355B、Q355C、45#、40CrNegotiableMOQ: 5 Metric Tons
-
Steel Billet & Semi-Finished Steel Billet，Q235B、Q195、SS400、Q355B、Q355C、45#、40CrNegotiableMOQ: 5 Metric Tons
-
Steel Billet & Semi-Finished Steel Billet，Q235B、Q195、SS400、Q355B、Q355C、45#、40CrNegotiableMOQ: 5 Metric Tons
-
Square Steel & Rectangular Steel Pipe，Q195, Q235B, Q355B (16Mn), S235JR, S355JRNegotiableMOQ: 5 Metric Tons
-
Square Steel & Rectangular Steel Pipe，Q195, Q235B, Q355B (16Mn), S235JR, S355JRNegotiableMOQ: 5 Metric Tons
-
Square Steel.Square Pipe, Square Tube• ASTM A500 Gr.A / Gr.B / Gr.C • EN10210 S235 / S275 / S355 • JIS G3466NegotiableMOQ: 5 Metric Tons
-
Square Steel & Rectangular Steel Pipe，Q195, Q235B, Q355B (16Mn), S235JR, S355JRNegotiableMOQ: 5 Metric Tons
-
Silicon Steel & Grain Oriented Silicon Steel，50W470、35W300、50W250，30Q130、27Q100、30Q120GNegotiableMOQ: 5 Metric Tons
