진전
제품개요
알루미늄 라운드 바 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. 우리의 2024 aluminum round bars are available in T4, T3511 and T851 tempers, produced per ASTM B211, QQ-A-225/6, GB/T 3191 and EN 755 standards, with diameters from 3 mm 에 400 mm and custom lengths.
화학적 구성 요소 (%), ASTM B211 / GB/T 3190
알 (알류미늄): 90.7 – 94.7 (balance)
구리 (구리): 3.8 – 4.9 (principal alloying element)
마그네슘 (마그네슘): 1.2 – 1.8
망 (망간): 0.3 – 0.9
그리고 (규소): 0.50 최대
철 (철): 0.50 최대
아연 (아연): 0.25 최대
Cr (크롬): 0.10 최대
의 (티탄): 0.15 최대
Others Each: 0.05 최대, Others Total: 0.15 최대
기계적 성질 (Typical Values, Bar)
Temper T4 (Solution Heat Treated & Naturally Aged): 인장강도 425-485 MPa, 항복 강도 275-345 MPa, 연장 10-14%
Temper T3511 (T4 + Stress Relieved, Extruded): 인장강도 425-485 MPa, 항복 강도 290-360 MPa, 연장 10-12%
Temper T851 (T6 + Stress Relieved, 고강도): 인장강도 455-510 MPa, 항복 강도 370-420 MPa, 연장 4-6%
Temper O (단련): 인장강도 185-220 MPa, 항복 강도 75-125 MPa, 연장 18-22%
경도: 120 HB (T4)
피로 강도: 138 MPa (T4, at 5×10⁸ cycles)
전단강도: 280 MPa (T4)
물리적 특성
밀도: 2.78 g/cm3 (0.100 lb/in³)
Melting Point: 502-638℃ (935-1180°F)
열 전도성: 121 W/(m·K) at 25°C (T4)
전기 전도도: 30% IACS (T4)
Electrical Resistivity: 5.7 × 10⁻⁸ Ω·m
Thermal Expansion Coefficient: 22.9 × 10⁻⁶/K (20-100℃)
탄성 계수: 73.1 평점 (10,600 ksi)
Poisson Ratio: 0.33
명세서
표준: ASTM B211, QQ-A-225/6, GB/T 3191, 안에 755-2 / 755-3, AMS 4120, JIS H4040
지름: 3 mm – 400 mm (0.12″ – 15.7″)
길이: 1 중 – 12 중 (custom cutting available)
성질: 영형, T4, T3511, T851
유형: Extruded bar, rolled bar, drawn bar, precision ground bar
표면 마감: 밀 마무리, 밝은, Drawn, Precision ground (h7-h9)
용인: 지름: ±0.1mm (drawn) to ±1.0mm (extruded), Straightness: ≤1mm/m
Special: Aerospace certification documentation (AMS/QQ-A) available on request
주요 특징 & 장점
- Very high strength – one of the strongest aluminum alloys, 최대 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
응용
- 항공우주 – aircraft structural parts, fuselage frames, wing components, ribs
- 패스너 – aircraft bolts, 나사, 리벳, studs
- Defense – 미사일 부품, ordnance parts, military hardware
- Mold tooling – mold bases, insert components, 도구 홀더
- Precision machinery – 기어, 샤프트, valve stems, high-stress fasteners
- Automotive racing – suspension parts, drive components, chassis fittings
- Marine high-performance – propeller shafts, 피팅 (with protection)
- 스포츠 장비 – high-performance bicycle and climbing components
- 전자제품 – high-strength connectors, structural elements
- General engineering – high-strength shafts, 다리, couplings, custom parts
Quality Control & Testing
Every batch of our 2024 aluminum round bars undergoes strict quality control:
Chemical Analysis: Spectrometer verification of Cu, 마그네슘, 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 (요청 시)
Dimensional Inspection: 지름, roundness, straightness, and length checks
Surface Inspection: Visual inspection for scratches, laps, pits, and seams
선적 서류 비치: Mill Test Certificate (MTC), heat treatment records, material traceability, conformity certificate
포장 & 배송
포장: 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: 합금, 성질, 크기, heat number, 기준, manufacturer logo
Trade Terms: 본선 인도, CIF, CFR, EXW, DDP
지불: T/T (30% deposit, 70% before shipment), L/C at sight, Western Union, PayPal (sample orders)
리드 타임: Standard sizes in stock – 3-7 날; Custom sizes – 15-30 날
MOQ: 200 kg for standard sizes; custom orders negotiable
Loading Port: Qingdao, Shanghai, Tianjin, Ningbo, or as requested
왜 우리를 선택 했습니까
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 국가. 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!
