Qingdao Jero Steel Co., Ltd.
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Prime Quality ASTM B209 AA5251 Aluminum Coil 5251 Alloy Aluminum Coil
Alloy 5251 is a non-heat treatable rolled product supplied as either sheet or coil. 5251
is stronger than 5005 and is used in applications requiring more structural integrity or
impact resistance. 5251 has excellent corrosion resistance, medium static strength, me
-dium to high fatigue strength, good weldability and very good corrosion resistance esp
-ecially in marine applications.
Key Characteristics
• Moderate Mg content (2.0-2.5%) offering balanced strength
• Exceptional corrosion resistance - outperforms 5052 in marine environments
• Excellent weldability - suitable for MIG/TIG welding
• Anodizing-friendly with good surface treatment adaptability
• Cost-performance leader between 5052 and 5083 alloys
Mechanical Properties
| Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
| O | 180-220 | 80-120 | 18-25 | 45-55 |
| H32 | 220-260 | 160-200 | 8-12 | 65-75 |
| H34 | 240-280 | 180-220 | 6-10 | 70-80 |
Key Advantages
• Enhanced Corrosion Resistance: Performs exceptionally well in marine environments,
outperforming standard 5052 alloy.
• Optimized Strength: Offers 15-20% higher strength than 5052 while maintaining good
formability.
• Welding Friendly: Maintains excellent weld characteristics without requiring post-weld
treatment
• Surface Ready: Accepts anodizing and coatings exceptionally well for aesthetic applications
• Cost Effective: Provides near-5083 performance at significantly lower cost
Industry Applications
• Marine Components
Ideal for shipbuilding applications including hull panels, decking, and marine hardware where
saltwater resistance is critical.
• Transportation Equipment
Widely used in truck bodies, rail components, and EV battery enclosures requiring durability
and weight savings.
• Architectural Features
Perfect for coastal building facades, roofing systems, and architectural trim demanding both
aesthetics and weather resistance.
• Industrial Fabrications
Commonly specified for chemical equipment, food processing machinery, and pressure vessels.
Our company advantages
Technological & Production Strengths:
♦ R&D Capabilities: Own a national-level corporate technology center and contributes to industry
standards.
♦ Production Scale: We had an annual capacity exceeding 1 million tons of aluminium large-scale
rolling mills.
♦ Production Ability: We can produce the great Aluminum material for automobile, railway transp
-ortation, marine, aerospace etc fields, and obtained the relevant certification.
Our factory own the world advanced equipments, include:
| Code | Name | Brand |
| A | aluminum ignot melting furnace | GAUTSCHI (Switzerland) |
| B | 4 continuous hot rolling mills | SMS Group (Germany) |
| C | 2800mm width single stand cold rolling mill | SMS Group (Germany) |
| D | all automatic three-dimensional elevated warehouse | Dematic (USA) |
