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5251

ASTM B209 / AlMg2Mn0.3 / 5251 / H34

化学性质 % 值
Silicon (Si)0,00 - 0,40
Chromium (Cr)0,00 - 0,15
Manganese (Mn)0,10 - 0,50
Magnesium (Mg)1,70 - 2,34
Copper (Cu)0,00 - 0,15
Titanium (Ti)0,00 - 0,15
Iron (Fe)0,00 - 0,50
Zinc (Zn)0,00 - 0,15
Aluminium (Al)Balance
物理特性
Density2,69 g/cm³
Melting Point605 °C
Thermal Expansion23.6 µm/m.°C
Modulus of Elasticity70 GPa
Thermal Conductivity150 W/m.K
Electrical Resistivity37% IACS
机械性能
Proof Strength170 MPa
Yield Strength220 MPa
Shear Strength130 MPa
Elongation A50 mm8%
Hardness62 HB

5251 H34 aluminum alloy is known for its high corrosion resistance, excellent weldability, and outstanding formability. With its magnesium content, 5251 offers enhanced durability along with moderate strength and lightweight properties. The H34 temper signifies that the alloy has been strain-hardened, stabilized, and partially annealed, providing a balance of strength and formability. These characteristics make 5251 H34 a versatile material for a wide range of applications.

This alloy is commonly used in marine applications, automotive components, chemical storage tanks, sheet metal work, and construction projects. It is highly suitable for anodizing, forming a uniform oxide layer that enhances corrosion resistance and provides an attractive finish. Regarding weldability, 5251 H34 performs exceptionally well and can be easily joined using standard welding techniques, maintaining much of its structural integrity after welding.

In terms of bending and forming, 5251 H34 aluminum alloy is highly flexible. It is suitable for creating complex shapes and tight-radius bends without a tendency to crack during processing. Additionally, it performs well in high-vibration environments due to its strength and fatigue resistance, offering long-term durability. These features make the alloy a reliable choice for equipment and structures exposed to dynamic loads.

The corrosion resistance of 5251 H34 is one of its standout attributes. It demonstrates excellent durability in saltwater, humid, and chemical environments, making it an ideal material for marine and outdoor applications. However, it may be limited in projects requiring very high strength. Advantages include high corrosion resistance, excellent weldability, aesthetic anodizing compatibility, and outstanding formability, while its disadvantages include limited load-bearing capacity. These properties make 5251 H34 an excellent material for projects prioritizing lightweight, durability, and ease of processing.

 

ALLOY DESIGNATIONS
 
5251 H34 has the following standard designations and specifications.

Sheets per;  5251 H34, ISO AlMg2Mn0.3, DIN AlMg2, WNR 3.3525, UNE L-3361, A-G2M, ASTM B209, UNS A95251

Cold Drawn Round/Flat Bars per; 5251 H34ISO AlMg2Mn0.3, ASTM B211, UNS A95251, DIN AlMg2, WNR 3.3525, BS 3 L56

 

Choosing Factors for 5251 H34

  • Strength: Average
  • Machining: Moderate
  • Weldability: Very good
  • Formability: Okay
  • Corrosion Resistance: Very good
  • Heat Treating: None
 

Some Well-Known Applications for 5251 H34

In components of insulation plates,

With a limited use in the aerospace industry,

In panellings in the construction industry.

 

SUPPLIED FORMS

5251 H34 is produced/supplied in the sheet, tube/profile, round/flat bar forms.
  • Sheet
  • Round/Flat Bar
  • Tube/Profile
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