5082 铝合金

What Is 5082 Aluminum?

5082 aluminum, also written AlMg4.5, is a non-heat-treatable 5xxx-series alloy containing about 4.0-5.0% magnesium. It sits between the softer 5052 and the stronger marine grades such as 5083 and 5059. The moderate magnesium level gives 5082 good strength, excellent weldability, and reliable corrosion resistance in marine and industrial environments, while keeping the risk of sensitization low.

Because it is strain-hardenable rather than heat-treatable, 5082 is supplied in O, H111, H112, and the H3x strain-hardened tempers. It is a common choice for ship superstructures, vehicle bodies, pressure equipment, and architectural paneling.

Available 5082 Aluminum Products

Linsy stocks and custom-rolls 5082 in the following forms. Dimensions below are typical production ranges; other sizes can be negotiated on request.

5082 Aluminum Sheet & Plate

尺寸	典型范围	备注
厚度	0.5 – 150 mm	Plate up to 150 mm, sheet 0.5 – 6 mm
宽度	500 – 3000 mm	Mill or cut-to-length edge
长度	500 – 12000 mm	Custom lengths available
常见状态	O, H111, H112, H32, H34, H38

5082 Aluminum Bar & Rod

尺寸	典型范围	备注
直径	6 – 400 mm	Round, square, hexagonal
长度	500 – 12000 mm	定尺切割
常见状态	O, H111, H112

5082 Aluminum Tube & Pipe

尺寸	典型范围	备注
外径	6 – 400 mm	Seamless or welded
壁厚	0.5 – 40 mm
长度	500 – 12000 mm	Custom lengths available
常见状态	O, H111, H112

规格与等效牌号

体系	名称
AA / UNS	5082 / A95082
EN	EN AW-5082 (AlMg4.5)
Common standards	ASTM B209, EN 485, EN 573, EN 754

化学成分

Composition below follows the AA 5082 specification. Values are weight percent, balance aluminium.

要素	内容 (%)
硅 (Si)	0.20（最大值）
铁（Fe）	0.35 最大值
铜 (Cu)	0.15 最大值
锰 (Mn)	0.15 – 0.35
镁（Mg）	4.00 – 5.00
铬 (Cr)	0.15 最大值
锌 (Zn)	最大 0.25
钛 (Ti)	最大 0.10
其他元素（每种 / 总计）	0.05 / 0.15
铝 (Al)	平衡

不同回火状态下的力学性能

Typical room-temperature properties for 5082 sheet and plate. Values are indicative and should be confirmed against the ordered specification and thickness.

脾气	拉伸强度（兆帕）	屈服强度（兆帕）	伸长率 (%)	布氏硬度 (HB)
O	275	125	22	75
H111	305	160	18	85
H32	315	245	14	95
H34	345	285	12	100
H38	380	330	10	110

硬度选择指南

• O / H111 – Soft and formable; best for deep drawing, bending, and complex fabricated parts.
• H112 – As-fabricated temper for plate where moderate strength and flatness are needed.
• H32 / H34 – Balanced strength and formability for panels, bodies, and welded assemblies.
• H38 – Highest strength among common 5082 tempers; use where stiffness matters and forming is minimal.

主要特点

Seawater & Chemical Corrosion Resistance

5082 resists corrosion in seawater and many industrial atmospheres, and its moderate magnesium content keeps sensitization risk low even after welding.

良好的焊接性

5082 welds readily with MIG and TIG. Matching or 5xxx filler (e.g. 5356, 5183) preserves corrosion resistance in the weld zone.

Balanced Strength & Formability

The H3x tempers provide useful strength while remaining formable enough for vehicle bodies and panels.

低温性能

Like other 5xxx alloys, 5082 retains toughness at low temperatures, supporting cryogenic and marine use.

应用

• Ship and boat superstructures, decks, and hull fittings
• Vehicle bodies, trailers, and transport frames
• Welded pressure vessels and storage tanks
• Architectural paneling and cladding
• General welded structures and fabricated parts

加工与表面处理说明

• 机加工： 5082 machines well with standard aluminum tooling; use coolant to avoid built-up edge.
• 焊接： MIG/TIG with 5xxx filler; preheat is rarely required for thin sections.
• 成型： O and H111 tempers form easily; verify bend radius for H3x tempers.
• 表面处理： Mill finish, brushed, anodized (even grey tone), powder coated, or PVC-film protected.

质量文件与检验

Every 5082 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, ISO 14001, and ISO 45001 systems.

Why Choose Linsy for 5082

Linsy is a Shenzhen-based aluminum supplier with more than 20 years of experience across the 1000-8000 series. For 5082 we support sheet, plate, bar, and tube 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.

相关资源

For deeper technical background on 5082 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 your project
• 5082 vs 5083 Aluminum: Strength and Corrosion Compared – which medium-Mg grade fits your application
• 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

5082 Aluminum FAQ

Is 5082 heat-treatable?

No. 5082 is a non-heat-treatable 5xxx alloy strengthened by strain hardening (the H tempers). It cannot be solution heat treated like 6xxx or 7xxx alloys.

How does 5082 compare to 5083?

5083 has higher magnesium (4.0-4.9% vs 4.0-5.0% nominal but typically stronger) and is the stronger marine grade. 5082 offers slightly lower strength with very good corrosion resistance and formability at lower cost for less critical structures.

Can 5082 be anodized?

Yes, though 5xxx alloys anodise to a grey tone. For a consistent decorative finish, powder coating is often preferred.

What filler should I use to weld 5082?

Use a 5xxx filler such as 5356 or 5183 matched to the service environment.

通常的交货周期是多久？

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

常见订购问题解答

最小起订量是多少？

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

是否提供工厂材质证书？

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.