Aluminium 5251
Your guide to Aluminium 5251
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Medium strength magnesium manganese alloy
Good surface finish & aesthetic properties
High corrosion resistance
Aluminium 5251 is a medium strength magnesium manganese alloy best known for its good ductility and formability. The high strength and extra hardness of aluminium 5251 over pure aluminium gives good machinability. Whilst not quite as good as heated treated alloys, it has reasonable machinability for its intended application.
This guide will take you through the main attributes, common applications, notes for designers and suitable finishing and treatments, as well as UK stock sizes and property tables. Don't forget to bookmark the page so you can refer back later.
If you are interested in 5251 machined parts, please scroll to the bottom of the page for more information about our service and to request a quote.
5251 Guide: Properties, Applications and Design Considerations
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What is 5251?
Aluminium 5251 is a medium strength magnesium manganese alloy best known for its good ductility and formability.
It has high corrosion resistance, and as a result is commonly used in marine environments.
5251 is traditionally recognised as a general sheet metal working grade. It is not heat treatable to higher strength.
You may also see 5251 referred to as the following common tempers:
- 0 – soft
- H22 – work hardened by rolling then annealed to quarter hard
- H24 – work hardened by rolling then annealed to half hard
- H26 – work hardened by rolling then annealed to three-quarter hard
Other designations include: AI Mg2 | AI 2.0Mg 0.3Mn | NS4 | EN AW 5251 | UNS A95251 | AA5251-H22 | AI5251-H22
Industry Examples: Marine | Aerospace | Architecture | Automotive | Chemica | Pharmaceutical
Typical Components & Applications: Panelling & pressings | Containers | Marine & aerospace components | Appliances | Packaging
Main Attributes:
- Good surface finish & aesthetic properties
- High corrosion resistance
- Very good weldability
- Low density
- Good anodising properties
- Good mechanical properties
- Medium strength
- High fatigue strength
Can we meet your 5251 machining needs? Contact us now
Further Reading & Resources
For more information on Aluminium check out the external link below
Aluminium 5251 Machined Parts
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Penta Precision provides the following 5251 aluminium machining services:
- CNC milling
- CNC turning
- Prototypes and batch runs
- Insert installation
- Part marking
- Manual milling
- Manual turning
- Machining design advice
- Design for manufacture service
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