Alliage d'aluminium 5251

What Is 5251 Aluminum Alloy Aluminum?

5251 Aluminum Alloy (AlMg2) is a non-heat-treatable aluminum-magnesium (5xxx) alloy. Its strength comes from magnesium in solid solution and strain hardening, not heat treatment. It offers good corrosion resistance—especially in marine and industrial environments—and welds well, which makes it a common choice for structures exposed to water, chemicals, or cycling loads.

Available 5251 Aluminum Alloy Aluminum Products

5251 Aluminum Alloy is supplied in several forms and tempers. Standard size ranges are below; other dimensions can be discussed with our team.

Tôle et plaque

Élément	Plage
Épaisseur	0.5 – 150 mm
Largeur	1000 – 3000 mm
Longueur	1000 – 6000 mm
États courants	O, H22, H24, H32, H34, H38

Bar (Round / Flat / Square)

Élément	Plage
Diameter / side	6 – 400 mm
Longueur	1000 – 6000 mm
États courants	O, H22, H24, H32, H34, H38

Tube & Pipe

Élément	Plage
Diamètre extérieur	6 – 400 mm
Wall thickness	0.5 – 40 mm
Longueur	1000 – 6000 mm
États courants	O, H22, H24, H32, H34, H38

Wire & Coil

Élément	Plage
Diamètre	0.8 – 12 mm
Poids de la bobine	10 – 500 kg
Size tolerance	± 0.05 mm
États courants	O, H22, H24, H32, H34, H38

Spécifications et désignations équivalentes

Standard	Désignation
AA (USA)	Alliage d'aluminium 5251
EN AW	AlMg2
Série	5000 (Al-Mg, non-heat-treatable)

Composition chimique

Élément	Poids %
Si	0,40 max
Fe	0,50 max
Cu	0,15 max
Mn	0.10 – 0.50
Mg	1.7 – 2.4
Cr	0,30 max
Zn	0,20 max
Ti	0,20 max
Al	Équilibre

Values are typical AA composition ranges; confirm against the ordered specification and the supplied MTC.

Propriétés mécaniques selon le traitement thermique

Tempérer	Résistance à la traction (MPa)	Limite d'élasticité (MPa)	Élongation (%)	Brinell
O	210	90	18	55
H22 / H32	230	130	14	60
H24 / H34	250	160	10	65
H38	270	200	7	70

Mechanical values are representative room-temperature typicals for plate, sheet, or bar and should be confirmed against the ordered thickness and the supplied MTC.

Guide de sélection des tempéraments

• O (recuit) : softest, best formability and corrosion resistance; for deep drawing and welding.
• H1xx / H2xx / H3xx: strain-hardened tempers with increasing strength and decreasing ductility.
• H116 / H321 : stabilized tempers for marine plate with good exfoliation-corrosion resistance.

Choose the softest temper that meets the strength need to keep forming and welding straightforward.

Caractéristiques principales

Résistance modérée

A medium-strength 5xxx alloy with good all-round properties for general fabrication.

Résistance à la corrosion

Very good in marine and outdoor environments; suitable for boat and transport use.

Weldability and formability

Welds well and forms readily in softer tempers.

Applications

• Boat hulls and marine components
• Récipients sous pression
• Wall panels and cladding
• Cadres de véhicules
• Road and transport signage

Remarques concernant le traitement et la finition de surface

5251 Aluminum Alloy is a non-heat-treatable 5xxx alloy, so strength comes from strain hardening (H-tempers), not heat treatment. It cuts, drills, and welds well with standard aluminum tooling.

• Découpe : CNC machining, laser cutting, and sawing are supported.
• Soudage : TIG and MIG welding with matching or compatible 5xxx filler.
• Formation : good cold formability in O and soft H-tempers.
• Finition de surface : mill finish, anodizing, polishing, powder coating, or PVC film protection.

Note: anodized color of 5xxx alloys can differ slightly from 6xxx alloys; confirm the finish on a sample if color match matters.

Documents relatifs à la qualité et contrôle qualité

Every 5086 order ships with a Mill Test Certificate (MTC) that reports the actual chemical analysis and mechanical results for the supplied material. Third-party SGS or equivalent test reports can be arranged on request for project or tender requirements.

• MTC (EN 10204 3.1 or 3.2) with every order
• Dimensional inspection against the agreed tolerance
• Surface and visual check before packing
• Material traceability by heat / lot number

Why Choose Linsy for 5251 Aluminum Alloy

Linsy Aluminum is a Shenzhen-based aluminum supplier with more than 20 years of experience serving marine, transport, and general engineering customers. We supply 1000–8000 series material in plate, bar, tube, wire, coil, profile, and block forms.

• ISO 9001, ISO 14001, and ISO 45001 certified management systems
• MTC with every order and SGS test reports available on request
• CNC machining, laser cutting, welding, and surface finishing support
• Typical custom lead time 10–60 days, with low minimum order quantities

For a quote, share your alloy, temper, dimensions, quantity, and any certificate requirements.

Ressources connexes

• 5251 Aluminum Buyer’s Guide
• Alliage d'aluminium 5052
• 5083 Marine-Grade Aluminum
• Aluminum Tempers Explained

5251 Aluminum Alloy Aluminum FAQ

Is 5251 heat treatable?

No. 5251 is a non-heat-treatable 5xxx alloy; strength comes from magnesium and strain hardening.

What tempers are available for 5251?

O, H22, H24, H32, H34, and H38 are typical for sheet, bar, and tube.

5251 vs 5052?

Both are medium-strength 5xxx alloys with similar corrosion behavior. Choice often comes down to available temper, thickness, and local specification.

FAQ générale sur les commandes

Quel est le délai de livraison habituel ?

Custom sizes are usually produced within 10–60 days depending on alloy, temper, and quantity. Confirm the schedule when you request a quote.

Fournissez-vous des certificats d'essai en usine ?

Yes. An MTC is provided with every order, and third-party test reports can be arranged on request.

Quelles sont les finitions de surface disponibles ?

Mill finish, anodizing, polishing, powder coating, and PVC film are available depending on the form.

Quelle est la quantité minimale de commande ?

We support low MOQs for custom requests. Share your required size and quantity for a quote.