進捗
Product Overview
Aluminum Round Bar 2024 is a high-strength aluminum-copper-magnesium (Al-Cu-Mg) alloy rod, one of the most important aerospace structural alloys. It offers very high strength, excellent fatigue resistance, and good machinability, making it the standard choice for aircraft structures, defense components, and high-performance mechanical parts. Our 2024 aluminum round bars are available in T4, T3511 and T851 tempers, produced per ASTM B211, QQ-A-225/6, ギガバイト/トン 3191 and EN 755 standards, with diameters from 3 mm to 400 mm and custom lengths.
化学組成 (%), ASTM B211 / ギガバイト/トン 3190
アル (アルミニウム): 90.7 – 94.7 (balance)
銅 (銅): 3.8 – 4.9 (principal alloying element)
マグネシウム (マグネシウム): 1.2 – 1.8
ん (マンガン): 0.3 – 0.9
と (シリコン): 0.50 max
鉄 (鉄): 0.50 max
亜鉛 (亜鉛): 0.25 max
Cr (クロム): 0.10 max
の (チタン): 0.15 max
Others Each: 0.05 max, Others Total: 0.15 max
機械的性質 (Typical Values, Bar)
Temper T4 (Solution Heat Treated & Naturally Aged): 抗張力 425-485 MPa, 降伏強さ 275-345 MPa, 伸長 10-14%
Temper T3511 (T4 + Stress Relieved, Extruded): 抗張力 425-485 MPa, 降伏強さ 290-360 MPa, 伸長 10-12%
Temper T851 (T6 + Stress Relieved, 高強度): 抗張力 455-510 MPa, 降伏強さ 370-420 MPa, 伸長 4-6%
Temper O (Annealed): 抗張力 185-220 MPa, 降伏強さ 75-125 MPa, 伸長 18-22%
硬度: 120 HB (T4)
疲労強度: 138 MPa (T4, at 5×10⁸ cycles)
剪断強度: 280 MPa (T4)
物理的特性
密度: 2.78 g/cm3 (0.100 lb/in³)
Melting Point: 502-638℃ (935-1180°F)
熱伝導率: 121 W/(m·K) at 25°C (T4)
電気伝導性: 30% IACS (T4)
Electrical Resistivity: 5.7 × 10⁻⁸ Ω·m
Thermal Expansion Coefficient: 22.9 × 10⁻⁶/K (20-100℃)
弾性率: 73.1 GPa (10,600 クシ)
Poisson Ratio: 0.33
Specifications
規格: ASTM B211, QQ-A-225/6, ギガバイト/トン 3191, で 755-2 / 755-3, AMS 4120, JIS H4040
Diameter: 3 んん – 400 んん (0.12″ – 15.7″)
長さ: 1 m – 12 m (custom cutting available)
気性: ○, T4, T3511, T851
タイプ: Extruded bar, rolled bar, drawn bar, precision ground bar
Surface Finish: Mill finish, Bright, Drawn, Precision ground (h7-h9)
許容範囲: Diameter: ±0.1mm (drawn) to ±1.0mm (extruded), Straightness: ≤1mm/m
Special: Aerospace certification documentation (AMS/QQ-A) available on request
Key Features & 利点
- Very high strength – one of the strongest aluminum alloys, up to 485 MPa tensile
- Excellent fatigue resistance – proven performance in aircraft cyclic loading
- High strength-to-weight ratio – the aerospace structural benchmark
- Good machinability – suitable for complex precision-machined parts
- Heat treatable – T4 and T851 tempers for different strength levels
- Good toughness at moderate temperatures
- Consistent properties – solution heat treated and stress relieved
- Proven in service – decades of aerospace and defense applications
- Available in precision ground condition for exacting tolerances
- Full material certification and traceability
アプリケーション
- Aerospace – aircraft structural parts, fuselage frames, wing components, ribs
- ファスナー – aircraft bolts, ネジ, リベット, studs
- Defense – missile components, ordnance parts, military hardware
- Mold tooling – mold bases, insert components, ツールホルダー
- Precision machinery – 歯車, シャフト, valve stems, high-stress fasteners
- Automotive racing – suspension parts, drive components, chassis fittings
- Marine high-performance – propeller shafts, fittings (with protection)
- Sports equipment – high-performance bicycle and climbing components
- エレクトロニクス – high-strength connectors, structural elements
- General engineering – high-strength shafts, ピン, couplings, custom parts
Quality Control & Testing
Every batch of our 2024 aluminum round bars undergoes strict quality control:
Chemical Analysis: Spectrometer verification of Cu, マグネシウム, Mn content
Mechanical Testing: Tensile test, yield strength test, elongation test, hardness test (per temper)
Heat Treatment Verification: Hardness and conductivity testing to verify T4/T851 treatment
Ultrasonic Testing: UT inspection per AMS 2630 for aerospace applications (on request)
Dimensional Inspection: Diameter, roundness, straightness, and length checks
Surface Inspection: Visual inspection for scratches, laps, pits, and seams
ドキュメンテーション: Mill Test Certificate (MTC), heat treatment records, material traceability, conformity certificate
Packaging & 運送
Packaging: Standard export packaging – bars bundled with steel straps, protective paper or film wrapping, wooden pallets or crates for heavy bundles; individual protective tubes for precision ground and aerospace-grade bars
Marking: 合金, 気性, サイズ, heat number, standard, manufacturer logo
Trade Terms: FOB, CIF, CFR, EXW, DDP
支払い: T/T (30% deposit, 70% 出荷前に), L/C at sight, Western Union, PayPal (sample orders)
Lead Time: Standard sizes in stock – 3-7 日々; Custom sizes – 15-30 日々
MOQ: 200 kg for standard sizes; custom orders negotiable
Loading Port: Qingdao, Shanghai, Tianjin, Ningbo, or as requested
私たちを選ぶ理由
With over 15 years of experience in aluminum manufacturing and export, we are a trusted supplier of 2024 aluminum round bars to aerospace, defense, and precision engineering companies in more than 50 国. Our factory is equipped with modern extrusion, drawing, heat treatment, and precision grinding lines, ensuring aerospace-grade quality and consistency. We maintain large inventory of standard sizes and tempers for immediate delivery, and our experienced team can provide technical consultation, material certification support, and customized solutions for your specific applications. Contact us today for a competitive quote!
