Product Overview
Our hot-rolled hexagonal steel bars are produced via controlled thermal rolling, delivering uniform 6-sided geometry and reliable mechanical properties for high-volume machining and fastener production. Supplied in straight lengths with standard hot-rolled surface scale, these bars feed directly into automated lathes, cold-forming lines, and forging operations.
We maintain a rolling schedule covering carbon, alloy, and free-machining steel grades, engineered to comply with international standards including ASTM/AISI, EN/DIN, and JIS.
Technical Specifications
|
Parameter |
Specification Range |
|
Size Range (Across Flats) |
10 mm to 80 mm (3/8 inch to 3 inches) |
|
Standard Lengths |
3,000 mm to 6,000 mm (Custom lengths available upon request) |
|
Common Steel Grades (US / EU Equivalents) |
AISI 1018 / C15E, AISI 1045 / C45E, AISI 4140 / 42CrMo4, 12L14, S355J2 |
|
Dimensional Tolerances |
Per ASTM A29 / EN 10278 |
|
Straightness |
Max 1.5 mm per 1,000 mm |
|
Condition |
Hot rolled, as-rolled surface, pickled & oiled optional |
Product Advantages
Dimensional Stability:
Controlled rolling parameters ensure consistent across-flat dimensions, minimizing tool wear during automated multi-axis CNC machining.
Metallurgical Cleanliness:
Sourced from electric arc furnace (EAF) steel billets with vacuum degassing, reducing internal inclusions and ensuring predictable heat-treatment response.
Tight Straightness Control:
Precision straightening processes prevent whip and vibration during high-RPM bar feeder operations.
Complete Traceability:
Every production heat is tracked from raw billet to finished bundle, backed by verifiable EN 10204 3.1 Mill Test Reports (MTRs).
Applications
Fastener Manufacturing: Standard raw stock for producing hexagonal nuts, heavy-duty bolts, and threaded fasteners.
Hand & Power Tools: Structural components for wrenches, sockets, spanners, and drive adapters.
Automotive & Machinery: Machined fittings, hydraulic valve bodies, coupling components, and shift linkages.
Hardware & Construction: Structural brackets, architectural connectors, and anchoring hardware.
Customization & Processing
Our manufacturing facility operates integrated rolling mills and finishing lines to support specific project requirements:
Exact-length sawing with square, deburred ends to reduce scrap at your facility.
Shot blasting, acid pickling, and rust-preventative oil coating to remove mill scale and prepare surfaces for cold drawing or direct machining.
Optional annealing (Spherodized Annealed) or Quenched & Tempered (Q&T) processing to adjust hardness and tensile strength prior to delivery.
Quality Control & Inspection
Manufacturing consistency is verified through rigorous inline and offline testing protocols:
Chemical Analysis: Spectrometric testing on every heat to verify carbon, manganese, chromium, and alloy element ranges.
Mechanical Testing: Tensile strength, yield strength, elongation, and Brinell/Rockwell hardness testing per ASTM/EN standards.
Surface & Internal Inspection: Eddy current testing for surface seam detection and ultrasonic testing for internal soundness on critical alloy grades.
Dimensional Verification: Laser micrometer monitoring during rolling to maintain tight across-flat tolerances.
Packaging & Shipping
Bundle Configuration:
Securely strapped with high-strength steel bands into hexagonal or square bundles (typically 1 to 2 metric tons).
Rust Protection:
Heavy-duty anti-rust oil applied to all unpainted bars; waterproof wrapping available for ocean freight.
Identification:
Metal tags affixed to each bundle displaying steel grade, heat number, size, piece count, and net/gross weight
Export Logistics & Incoterms:
Full support for standard international shipping terms, including FOB, CIF, and DDP options depending on destination port requirements, complete with verified export documentation.
FAQ
Q: What is the standard Minimum Order Quantity (MOQ)?
A: MOQ is typically 5 metric tons per size/grade for mill production runs. Smaller quantities may be available from our current rolling stock rotation.
Q: Do you provide Mill Test Reports (MTRs)?
A: Yes. Every shipment includes comprehensive EN 10204 3.1 test certificates covering chemistry, mechanical properties, and heat numbers.
Q: Can you supply cut-to-length bars?
A: Yes. We offer precision band-saw cutting to your specified manufacturing tolerances.
Request a Mill Quote
Provide your specifications below to receive a direct quotation:
• Steel Grade / Standard (ASTM / AISI or EN / DIN)
• Size (Across Flats) & Length
• Required Quantity (Metric Tons)
• Destination Port & Preferred Incoterms (FOB / CIF / DDP)
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