6061-T651 Precision Ground Rod
- 6061‑T651 is a premium Al‑Mg‑Si series precision aluminum bar, manufactured in accordance with ASTM B211 and AMS 4027 specifications.
- Adopting professional processes including hot extrusion, solution treatment, stretching stress relief, artificial aging and centerless precision grinding, it effectively eliminates internal residual stress.
- Features ultra‑low deformation, excellent straightness, high roundness and strict diameter tolerance such as h6 / h7 / h8 grade.
- Balanced mechanical properties, stable hardness and outstanding CNC machinability, suitable for high‑precision continuous processing.
- Possesses good natural corrosion resistance and stable surface performance, supporting anodizing, coating and other surface treatments.
- Fine and uniform internal grain structure ensures long‑term dimensional stability after cutting and processing.
- Mainly used in automation equipment, optical fixtures, semiconductor parts, aerospace accessories and precision mechanical structural components.
- Strict quality inspection and complete mill test certificates are available to meet high‑end industrial procurement and manufacturing standards.
Product Introduction: 6061-T651 Precision Ground Aluminum Rod
Produktübersicht
6061-T651 Precision Ground Aluminum Rod is a high-precision, stress-relieved aluminum alloy product manufactured from premium 6061 aluminum ingot through a rigorous process of hot extrusion, solution heat treatment, controlled stretching (stress relief), artificial aging, and precision centerless grinding. This specialized production flow delivers an exceptional combination of high mechanical strength, superior dimensional stability, excellent machinability, and a flawless surface finish. Engineered for critical applications where tight tolerances, minimal distortion, and consistent performance are non-negotiable, our 6061-T651 precision ground rod is the material of choice for precision engineering, aerospace, automation, and high-performance component manufacturing.
Material & Temper Specifications
- Legierungsbezeichnung: 6061 (Al-Mg-Si Alloy)
- Temperament: T651 (Solution Heat Treated, Stress Relieved by Stretching, Artificially Aged)
- Standards Compliance: Fully conforms to ASTM B211, AMS 4027, Und ISO 6362
- Chemical Composition (Wt. %):
- Silicon (Si): 0.40 – 0.80
- Iron (Fe): ≤ 0.70
- Copper (Cu): 0.15 – 0.40
- Manganese (Mn): ≤ 0.15
- Magnesium (Mg): 0.80 – 1.20
- Chromium (Cr): 0.04 – 0.35
- Zinc (Zn): ≤ 0.25
- Titanium (Ti): ≤ 0.15
- Others (each): ≤ 0.05
- Aluminum (Al): Balance
Key Mechanical Properties
- Ultimative Zugfestigkeit: ≥ 290 MPa (42 ksi)
- Streckgrenze: ≥ 240 MPa (35 ksi)
- Verlängerung: ≥ 8% (for diameters ≤ 6.35mm); ≥ 10% (for diameters > 6.35mm)
- Härte: 93 – 95 HB (Brinell)
- Ermüdungsfestigkeit: ~97 MPa (14 ksi)
- Elastizitätsmodul: ~68.9 GPa
- Dichte: 2.70 g/cm³
Precision Ground Specifications
- Form: Round Rod (Bar)
- Durchmesserbereich: 3.0mm – 150.0mm
- Durchmessertoleranz: h6, h7, h8 (Standard: h6; e.g., ±0.003mm for φ10mm)
- Länge: Custom cut-to-length from 100mm to 6000mm
- Length Tolerance: +0.125mm / 0mm
- Oberflächenfinish: Precision Ground (Ra ≤ 0.8μm – 1.6μm)
- Geradlinigkeit: ≤ 0.5mm/m (Total indicator reading)
- Roundness: ≤ 1/2 of diameter tolerance
Core Advantages & Performance Benefits
Unmatched Dimensional Stability
The defining characteristic of the T651 temper is the critical stress-relief step via controlled stretching. This process eliminates internal residual stresses from extrusion and heat treatment. As a result, our 6061-T651 rod exhibits excellent resistance to warping, twisting, and distortion during and after machining, even for complex, high-removal CNC operations. This ensures that finished parts maintain their designed geometry and tight tolerances throughout their lifecycle.
Superior Machinability
Compared to standard T6 temper, 6061-T651 offers excellent machinability. The stress-free microstructure allows for smooth cutting, superior chip formation, and reduced tool wear. It is ideally suited for high-speed machining (HSM) and produces parts with exceptional surface quality without chatter or deflection, making it perfect for tight-tolerance turned, milled, and drilled components.
High Strength & Lightweight
Offering a high strength-to-weight ratio, 6061-T651 provides robust structural integrity while keeping component weight low. This is critical for aerospace, automotive, and robotic applications where weight reduction directly impacts performance and efficiency.
Ausgezeichnete Korrosionsbeständigkeit
The 6061 alloy inherently possesses good resistance to atmospheric corrosion, freshwater, and a wide range of chemicals. The T651 temper further enhances stress-corrosion cracking (SCC) resistance, ensuring long-term durability in harsh operational environments without the need for frequent protective coatings.
- Versatile Fabrication Properties
- Schweißbarkeit: Excellent weldability using all common methods (TIG, MIG). Post-weld aging can restore much of the base material strength.
- Formbarkeit: While primarily a machining alloy, it retains sufficient ductility for minor bending and forming operations.
- Finishability: The fine-grained, ground surface accepts anodizing, painting, powder coating, and other finishing processes with excellent adhesion and uniformity.
Manufacturing & Quality Assurance
Our 6061-T651 Precision Ground Rod is produced under strict ISO 9001 quality management systems. Key processes include:
- Premium Raw Material: Select primary aluminum alloy certified to international standards.
- Precision Extrusion: Controlled hot extrusion for consistent grain structure.
- Solution Heat Treatment: Precise temperature and time control for optimal solid solution.
- Stressabbauend: Precise stretching (1.5% – 3%) to eliminate internal stresses.
- Artificial Aging: Precisely controlled aging to achieve the T651 temper.
- Centerless Grinding: High-precision grinding lines ensure tight diameter tolerances and mirror-like surface finish.
- Comprehensive Testing: Every batch undergoes mechanical testing, hardness testing, dimensional inspection, and ultrasonic testing to ensure full compliance with specifications. A Materialtestzertifikat (MTC) is provided with every order.
Typical Industrial Applications
Our 6061-T651 Precision Ground Rod is specified for high-precision components across demanding industries:
- Aerospace & Defense: Aircraft fittings, structural components, instrument panels, landing gear parts, satellite components.
- Precision Machining & Tooling: CNC machined parts, jigs, fixtures, gauges, molds, and die components.
- Automation & Robotics: High-precision shafts, linear motion components, robotic arms, actuator parts.
- Optical & Photonics: Precision mounts, frames, and stages for optical equipment.
- Semiconductor Equipment: Structural components requiring ultra-stability and cleanliness.
- Allgemeiner Ingenieurwesen: High-performance shafts, valves, fittings, and mechanical parts where precision and stability are paramount.
- Transport: High-end bicycle components, motorcycle parts, and lightweight structural members.
Fazit
6061-T651 Precision Ground Aluminum Rod represents the pinnacle of quality and performance for precision engineering applications. By combining the versatile strength of 6061 alloy with the stress-relieved stability of the T651 temper and the extreme accuracy of precision grinding, this product delivers unmatched reliability and performance. It is the definitive choice for manufacturers who demand zero compromises on dimensional accuracy, stability, and material integrity for their most critical components.
