Hexagonal Steel Bar
Product Overview
Hexagonal steel bars serve as primary stock material for high-speed CNC machining centers and automatic lathe production lines. The geometric profile reduces material waste and machining cycles when producing precision fasteners, hydraulic couplings, and valve components. Produced via cold drawing or hot rolling processes, these bars deliver uniform mechanical properties and controlled dimensional tolerances tailored for automated industrial manufacturing.
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Technical Specifications
|
Parameter |
Specification Details |
|
Size Range (Across Flats) |
6 mm to 80 mm (1/4 inch to 3 inches) |
|
Standard Lengths |
3,000 mm, 5,800 mm, 6,000 mm (custom lengths available) |
|
Material Grades |
Carbon Steel: AISI 1018, 1045, 12L14 Alloy Steel: AISI 4140, 8620 Stainless Steel: 304/304L, 316/316L, 410, 430 |
|
Execution Standards |
ASTM A29, EN 10278, DIN 178, JIS G4803 |
|
Tolerance Class |
h11, h9, or customized per drawing requirements |
|
Surface Finish |
Cold Drawn, Centerless Ground, Polished, or Hot Rolled (Descaled) |
|
Straightness |
<= 1.0 mm/m (precision straightened for high-RPM applications) |
Product Advantages
Strict Dimensional Control:
Cold drawing processes maintain tight across-flat tolerances (+/- 0.03 mm available), minimizing tool wear and vibration in automated bar feeders.
Controlled Mechanical Properties:
In-house heat treatment lines (annealing, quenching, and tempering) ensure consistent tensile strength and hardness profiles per production heat lot.
Machinability Optimization:
Additions of lead or sulfur in specific grades (e.g., 12L14) promote optimal chip breakage during high-speed turning operations.
Surface Integrity:
Surface defect removal via peeling or centerless grinding eliminates decarburization layers and surface fissures prior to component machining.
Fastener Manufacturing: Production of heavy hex nuts, bolts, threaded inserts, and specialized structural fasteners.
Fluid Power Systems: Machining of hydraulic fittings, adapters, valve bodies, and connector manifolds.
Automotive & Machinery: Transmission components, drive shafts, gear blanks, and motor parts.
Hand Tools & Hardware: Sockets, wrenches, drill bit adapters, and structural coupling pins.
Customization & Processing
Length Cutting:
Precision cutting via high-speed band saws with length tolerances within +/- 1 mm.
End Machining:
Chamfering, deburring, and facing available to prepare bars directly for automated lathe insertion.
Specialized Heat Treatment:
Stress relieving, spheroidize annealing, or full quench-and-tempering executed based on specific end-use mechanical demands.
Traceability Stamping:
Heat numbers and grade markings hard-stamped or color-coded on bar ends for immediate shop-floor identification.
Dimensional Verification: Laser micrometer scanning for continuous across-flat measurement during drawing.
Internal Defect Detection: Ultrasonic testing (UT) performed in accordance with ASTM A388 to identify internal porosities or inclusions.
Mechanical Testing: Tensile testing, Charpy V-notch impact testing, and Brinell/Rockwell hardness testing conducted per production heat.
Documentation: Mill Test Certificates (MTC) supplied in compliance with EN 10204 3.1, detailing exact chemical composition and mechanical test results prior to shipment.
Packaging & Shipping
Bundling: Securely bundled with heavy-duty steel strapping, reinforced with wooden spacers to prevent bending during transit.
Surface Protection: Anti-rust oil coating applied to carbon and alloy steel bars; optional plastic sleeve wrapping for precision ground stock.
Weight Limits: Standard export bundles restricted to 2,000 kg to 3,000 kg for safe overhead crane handling at customer facilities.
Logistics: Containerized sea freight or break-bulk shipping with weather-resistant internal container lining to prevent moisture condensation.
FAQ & Request a Quote
Request a Quote
Submit your required specifications—including steel grade, across-flat size, length, and quantity—to receive a formal commercial proposal and technical datasheet within 24 hours.
As one of the most professional hexagonal steel bar manufacturers and suppliers in China, we're featured by quality products and low price. Please rest assured to buy high-grade hexagonal steel bar in stock here from our factory.