Alliage d'aluminium 5059

What Is 5059 Aluminum?

5059 aluminum is a high-magnesium 5xxx-series alloy developed for marine and structural applications that require the highest levels of corrosion resistance combined with strength. It carries approximately 5.0-6.0% magnesium, supported by manganese, chromium, and a deliberate zirconium addition that refines the grain structure and improves strength after welding. Because it is non-heat-treatable, 5059 is strengthened by strain hardening and is most often supplied in H116, H321, and H131 tempers for plate, sheet, and extrusions.

In practice 5059 is treated as a stronger, more corrosion-resistant successor to 5083. It is widely specified for naval vessels, LNG and chemical tankers, offshore platforms, and large welded storage tanks where long service life in seawater is mandatory.

Available 5059 Aluminum Products

Linsy stocks and custom-rolls 5059 in the following forms. Dimensions below are typical production ranges; other sizes can be negotiated on request.

5059 Aluminum Sheet & Plate

Dimension	Typical Range	Note
Épaisseur	0.5 – 150 mm	Plate up to 150 mm, sheet 0.5 – 6 mm
Largeur	500 – 3000 mm	Mill or cut-to-length edge
Longueur	500 – 12000 mm	Custom lengths available
États courants	O, H111, H116, H321, H131	H116/H321 for marine plate

5059 Aluminum Bar & Rod

Dimension	Typical Range	Note
Diamètre	6 – 400 mm	Round, square, hexagonal
Longueur	500 – 12000 mm	Cut to length
États courants	O, H111, H116

5059 Aluminum Tube & Pipe

Dimension	Typical Range	Note
Diamètre extérieur	6 – 400 mm	Seamless or welded
Wall thickness	0.5 – 40 mm
Longueur	500 – 12000 mm	Custom lengths available
États courants	O, H111, H116

Spécifications et désignations équivalentes

Système	Désignation
AA / UNS	5059 / A95059
FR	EN AW-5059
Common standards	ASTM B209, ASTM B928, EN 485, EN 573, EN 754

Composition chimique

Composition below follows the AA 5059 specification. Values are weight percent, balance aluminium.

Élément	Contenu (%)
Silicium (Si)	0.45 max
Fer (Fe)	0,50 max
Cuivre (Cu)	0,25 max
Manganèse (Mn)	0.60 – 1.10
Magnésium (Mg)	5.00 – 6.00
Chrome (Cr)	0.05 – 0.25
Zinc (Zn)	1.50 max
Zirconium (Zr)	0.05 – 0.25
Titane (Ti)	0,20 max
Autres (chaque / total)	0.05 / 0.15
Aluminium (Al)	Équilibre

Propriétés mécaniques selon le traitement thermique

Typical room-temperature properties for 5059 plate and sheet. Values are indicative and should be confirmed against the ordered specification and thickness.

Tempérer	Résistance à la traction (MPa)	Limite d'élasticité (MPa)	Élongation (%)	Brinell Hardness (HB)
O	310	170	20	85
H111	350	200	18	95
H116 / H321	400	280	14	110
H131	440	380	12	125

Guide de sélection des tempéraments

• H116 / H321 – Stabilized marine plate tempers. Best retained corrosion resistance after welding; the default choice for hulls, decks, and tanks.
• H131 – Highest strength temper for structural members where weight saving matters.
• H111 – Moderate strength with better formability than H116; general fabricated parts.
• O – Fully softened for deep drawing, bending, and complex forming before work hardening.

Caractéristiques principales

Exceptional Seawater Corrosion Resistance

5059 offers the best exfoliation and stress-corrosion resistance among the high-Mg 5xxx alloys, especially in the H116/H321 tempers after welding.

High Strength Without Heat Treatment

Strain-hardened 5059 reaches tensile strengths near 400-440 MPa, rivalling some 6xxx and 7xxx tempers while remaining weldable.

Excellente soudabilité

5059 welds well with MIG and TIG processes. Use matching or 5xxx filler such as 5556 or 5183 to keep corrosion resistance in the heat-affected zone.

Good Low-Temperature Toughness

Strength and toughness are retained at sub-zero temperatures, supporting LNG and cryogenic tank use.

Applications

• Naval and coast-guard vessel hulls, superstructures, and decks
• LNG and chemical tankers, cargo tanks, and process vessels
• Offshore platforms and subsea structures
• Récipients sous pression soudés et réservoirs de stockage
• Bridges, transport frames, and crash-critical structural parts

Remarques concernant le traitement et la finition de surface

• Usinage : 5059 machines comparably to other high-Mg alloys; use sharp tooling and moderate speeds to avoid built-up edge.
• Soudage : MIG/TIG with 5xxx filler. Minimise heat input to preserve the H temper near the weld.
• Formation : H116/H321 bend well along the rolling direction; verify minimum bend radius for thick plate.
• Finition de surface : 5xxx alloys anodise to an uneven grey tone, so powder coating or PVC film is usually preferred for appearance. Mill finish, brushed, and PVC-protected options are available.

Documents relatifs à la qualité et contrôle qualité

Every 5059 order ships with a Mill Test Certificate (MTC) covering chemical composition and mechanical properties. Third-party inspection and SGS test reports are available on request. Linsy’s production is managed under ISO 9001 quality, ISO 14001 environmental, and ISO 45001 occupational-health systems.

Why Choose Linsy for 5059

Linsy is a Shenzhen-based aluminum supplier with more than 20 years of experience across the 1000-8000 series. For 5059 we support plate, bar, tube, and profile in marine tempers, with in-house CNC machining, cutting, welding preparation, and surface finishing. Typical custom lead time is 10-60 days depending on form and quantity, with MTC supplied on every order.

Ressources connexes

For deeper technical background on 5059 and related alloys, see the following resources from Linsy’s knowledge library:

• 5xxx Series Aluminum Alloys: A Buyer’s Guide – how to select the right Al-Mg alloy for marine and structural work
• 5059 vs 5083 Aluminum: Which High-Mg Alloy to Choose? – side-by-side comparison of strength and corrosion behaviour
• Marine-Grade Aluminum: Material Selection for Boat Building – which alloys are approved for which service conditions
• Understanding Aluminum Temper Designations: O, H, and T – what temper codes mean and how to choose the right one

5059 Aluminum FAQ

Is 5059 the same as 5083?

No. 5059 is a stronger, zirconium-modified variant of 5083 with higher allowable magnesium and better strength after welding. Choose 5059 where maximum corrosion resistance and strength are required.

Can 5059 be anodized?

5xxx alloys anodise to a grey, sometimes uneven finish, so anodizing is not usually recommended for appearance. Powder coating or PVC film protection is preferred.

What filler should I use to weld 5059?

Use a matching or higher-Mg 5xxx filler such as 5556 or 5183 to maintain corrosion resistance in the weld zone. Confirm the exact filler with your welding procedure.

Which tempers are available?

Common tempers are O, H111, H116, H321, and H131. H116 and H321 are the standard marine plate tempers.

Quel est le délai de livraison habituel ?

Typical custom lead time is 10-60 days depending on form, temper, and order quantity. Contact us with your drawing or specification for a firm quote.

FAQ générale sur les commandes

Quelle est la quantité minimale de commande ?

MOQs depend on form and size. Smaller stock sizes may have lower MOQs; fully custom dimensions are quoted per enquiry.

Fournissez-vous des certificats d'essai en usine ?

Yes. An MTC is supplied with every order, and SGS or third-party inspection reports can be arranged on request.

Which certifications does Linsy hold?

Production is managed under ISO 9001, ISO 14001, and ISO 45001 systems. Material can be supplied to ASTM, EN, GB, and JIS standards on request.

Can you cut or machine to drawing?

Yes. We offer CNC machining, laser cutting, bending preparation, and surface finishing before shipment.