5083 铝合金

What Is 5083 Aluminum Alloy?

5083 is a 5xxx-series aluminum alloy whose principal alloying element is magnesium (about 4-4.9%), with manganese added for strength and grain control. It belongs to the group of non-heat-treatable marine-grade alloys: it cannot be strengthened by heat treatment, and instead gains strength through cold working (strain-hardened H tempers).

Because of its very low tendency to corrode in salt water and its ability to keep most of its strength after welding, 5083 is one of the most widely used alloys for marine and cryogenic applications. It is supplied in tempers from soft annealed (O) to heavily strain-hardened marine grades (H116, H321).

Available 5083 Aluminum Products

Linsy supplies 5083 in the forms and size ranges below. Custom dimensions outside these ranges can be produced on request.

5083 Sheet and Plate

形式	厚度（毫米）	宽度（毫米）	长度（毫米）	常见状态
片材	0.5 – 6	1000 – 2600	2000 – 12000	O, H111, H116, H321, H32
板材	6 – 200	1000 – 3000	2000 – 12000	O, H111, H112, H116, H321
线圈	0.5 – 6	1000 – 2200	coil	O, H111, H32, H34

5083 Bar, Tube, and Profile

形式	Section size (mm)	长度（毫米）	常见状态
Round bar	Diameter 6 – 400	1000 – 6000	O, H111, H116, H321
Square bar	6 – 200	1000 – 6000	O, H111, H116
Tube (round)	OD 6 – 400, wall 0.5 – 40	1000 – 6000	O, H111, H112
Profile / extrusion	per drawing	per drawing	O, H111, H112

规格与等效牌号

5083 is covered by the following common designations:

• EN AW-5083 / AlMg4.5Mn0.7
• UNS A95083
• ISO AlMg4.5Mn0.7
• JIS A5083
• GB/T 3190 5083

Relevant product standards include ASTM B209 (sheet and plate), ASTM B221 (bar, rod, and profile), ASTM B241 (tube and pipe), and ASTM B928 / B928M (marine-grade plate and sheet). European supply typically follows EN 485 and EN 573.

化学成分

The typical composition of 5083 aluminum (per ASTM/EN) is shown below. Values are percentage by weight; aluminum is the balance.

要素	内容 (%)
硅 (Si)	0.40（上限）
铁（Fe）	0.40（上限）
铜 (Cu)	最大 0.10
锰 (Mn)	0.40 – 1.00
镁（Mg）	4.00 – 4.90
铬 (Cr)	0.05 – 0.25
锌 (Zn)	最大 0.25
钛 (Ti)	0.15 最大值
其他（每项）	0.05 最大值
其他（共计）	0.15 最大值
铝 (Al)	平衡

不同回火状态下的力学性能

The values below are typical room-temperature properties for 5083 and are indicative only. Actual values depend on product form, thickness, and the ordered specification. Always confirm against the MTC for your lot.

脾气	抗拉强度 (MPa)	屈服强度 (MPa)	伸长率 (%)	布氏硬度 (HB)
O	275	125	16	75
H111	290	165	14	80
H112	275	125	12	75
H116	305	215	12	95
H321	305	215	12	95
H32	315	235	12	100

硬度选择指南

5083 is non-heat-treatable, so tempers are either annealed (O) or strain-hardened (H). Choose based on the balance of formability, strength, and corrosion performance your part needs:

• O（退火状态）： softest and most formable; best for deep forming and where maximum corrosion resistance is needed.
• H111 / H112: lightly worked, slightly stronger than O while keeping good formability; common for general plate and extrusions.
• H116 / H321： marine tempers with good strength and improved resistance to exfoliation and stress corrosion cracking; the default choice for hulls and offshore structures.
• 耐海水和化学品腐蚀性能 increasingly strain-hardened for higher strength where welding is not the dominant concern.

主要特点

作为一种不可热处理强化合金，5083在焊接后能保持大部分强度，并且不会像可热处理强化合金那样出现热影响区软化问题。它易于通过TIG和MIG工艺焊接；通常使用5xxx系焊丝，如5183或5356。

不可热处理强化类别中的强度.

焊接性

在加工硬化铝合金中，5083在保持良好的延展性的同时，提供了最高的强度水平之一。应变硬化状态（H116、H321、H32）提高了屈服强度，而不会牺牲太多成型性。.

低温韧性

5083在极低温度下保持韧性，不会变脆，这就是为什么它被广泛用于液化天然气储罐和低温压力容器。.

特殊海洋级状态

H116和H321等状态被指定用于海洋服役，因为它们与通用状态相比，具有改进的抗剥落腐蚀和抗应力腐蚀开裂性能。.

抗应力腐蚀开裂

海洋和造船：肋骨、纵桁和船体结构构件.

应用

5083 is used wherever corrosion resistance, weldability, and moderate-to-high strength are required in demanding environments:

• Shipbuilding: hull plates, superstructures, decks, and bulkheads
• Offshore and marine structures: platforms, risers, and fittings
• Pressure vessels and cryogenic tanks, including LNG storage
• Transport: tanker bodies, vehicle armor, and rail cars
• Welded fabrications and structural components exposed to chemicals or seawater

加工与表面处理说明

5083 machines well and is readily weldable. A few practical notes for buyers and fabricators:

• 焊接： TIG and MIG welding are standard. Use 5xxx filler matching the base magnesium level (commonly 5183 or 5356) to avoid sensitization.
• 成型： O and H111 tempers form best; heavily strain-hardened tempers need larger bend radii.
• 机加工： slightly gummy compared with 6xxx alloys; sharp tooling and proper coolant help.
• 表面处理： available as mill finish, anodized, polished, powder coated, or with PVC film protection for plate.

质量文件与检验

我们的生产遵循ISO 9001（质量）、ISO 14001（环境）和ISO 45001（职业健康与安全）管理体系。尺寸和外观检验根据订单要求的ASTM、EN或GB规范进行。.

为何选择林西的5083扁棒.

Why Choose Linsy for 5083

林西铝业是一家总部位于深圳的铝材制造商，拥有20多年供应1000至8000系列板材、棒材、管材、线材、卷材和型材的经验。

海洋级5083，全程可追溯.

我们库存和加工客户实际需要的海洋级状态（O、H111、H116、H321）的5083产品，并为每批货物提供MTC文件，确保您的项目通过船级社认证和焊接工艺评定要求。

一站式加工和表面处理.

除了供应原始形态产品外，我们还提供CNC加工、激光切割、锯切和表面精加工（阳极氧化、抛光、铣削表面、粉末涂层、PVC膜保护），以交付更接近成品的部件。

定制尺寸和合理的交货周期.

典型定制交货周期为10-60天，具体取决于状态、尺寸和数量。新项目支持小批量试订单和低起订量。

船用铝合金板：5052与5083 — 如何做出最佳选择.

相关资源

• Marine Aluminum Plate: 5052 vs 5083 — Making the Best Choice
• 5083 铝板选择终极指南
• 5083-H321 铝合金终极指南
• 5083 铝：全面概述

5083 Aluminum FAQ

Is 5083 heat treatable?

No. 5083 is a non-heat-treatable 5xxx alloy. It is strengthened only by cold working (strain-hardened H tempers) and cannot be solution-heat-treated like 6xxx or 7xxx grades.

What is the difference between H116 and H321?

Both are marine tempers with similar strength, but they reach that condition through different strain-hardening routes. Either is acceptable for most marine work; specify the one your design or classification society calls for.

Which filler wire should I use to weld 5083?

5xxx fillers matched to the base alloy are typical, most often 5183 or 5356. The exact choice depends on joint design and the required corrosion and strength performance.

Can 5083 be used for cryogenic service?

Yes. 5083 retains toughness at low temperatures and is a common material for LNG and other cryogenic tanks.

How does 5083 compare with 5052 or 5086?

5083 has the highest magnesium (and generally strength) of the three; 5052 is softer and more formable for lighter marine parts, while 5086 sits between them. All three share excellent seawater corrosion resistance.

常见订购问题解答

定制 5083 产品的典型交货期是多久？

典型定制交货期为 10 至 60 天，具体取决于状态、尺寸及订单数量。常备状态产品通常可更快发货。.

贵司是否提供工厂测试证书？

是的。每笔订单均附带材质证明书（MTC），其中报告化学成分、力学性能及适用标准。可根据要求提供 SGS 或第三方检验报告。.

贵司的最低订购量是多少？

我们支持原型制作及试运行的低最低起订量（MOQ）。具体最低数量取决于产品形态及尺寸，请告知您的需求以获取报价。.

你们发货到哪些国家？

我们出口至全球。请联系我们并提供您的交货港口，我们将确认物流及文件事宜。.

能否将 5083 切割或机加工至指定尺寸？

可以。我们提供锯切、激光切割及 CNC 机加工服务，以及阳极氧化、抛光等表面处理。.