5052 aluminum
5052 temper and product-form properties, sheet-forming and welding limits, and the boundaries of marine application claims.
Tags: materials, aluminum, wrought-alloys
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Alloy identity and selection
For 2.0 mm 5052-H32 sheet, Hulamin's 1.2–6.3 mm rolled-product row gives 160 MPa minimum proof stress. Kaiser publishes 195 MPa typical yield for H32 tube and pipe, a separate product and evidence basis. Hulamin rolled-product properties, Kaiser tube and pipe data
5052 is a wrought aluminum–magnesium alloy. The Aluminum Association's Teal Sheets, revised December 2025, specify magnesium at 2.2–2.8% and chromium at 0.15–0.35% by mass, with silicon limited to 0.25%, iron to 0.40% and copper to 0.10%. These are composition limits, not a batch analysis or mechanical-property guarantee. Aluminum Association, Teal Sheets, 5052 entry
Hydro describes 5052 as non-heat-treatable, with useful formability, weldability and corrosion resistance. Its application examples include sheet-metal work, marine components and tanks. These descriptions help shortlist the alloy; they do not establish that any 5052 product meets a particular structural, pressure-vessel or marine requirement. Hydro, 5052 aluminum
A purchase description should include alloy, temper, product form, dimensions, standard/edition, dimensional tolerances, surface condition and inspection requirements. Do not infer plate, sheet, tube or treadplate properties from the alloy number alone. Related Al–Mg alloys also require explicit equivalence review rather than substitution by a similar trade description.
Temper and heat exposure
Aalco describes H32 as work hardened by rolling and stabilized by low-temperature heat treatment to quarter hard. Stabilization does not make 5052 a precipitation-hardening alloy or authorize a T6-style aging route. Aalco, 5052 H32 sheet and treadplate, temper description
Keep the delivered temper separate from the condition after forming, welding or other heating. A work-hardened product can lose local strength during fabrication. Any intermediate annealing or thermal straightening needs a controlled route that delivers the required final dimensions and properties; the alloy label is not a heat-treatment procedure.
For acceptance, preserve the applicable thickness band, test direction, specimen requirements and property definitions. A tensile result from one product form is not evidence for another, and a nominal temper designation does not eliminate the need for the required inspection documentation.
Published sheet limits and typical tube values
Hulamin's 5052 Rolled Products Data Sheet gives the following entries, stating that single numbers are minima:
| Temper and thickness band as printed | 0.2% proof strength, minimum | Tensile strength range | A50 elongation, minimum |
|---|---|---|---|
| H32, 0.4–0.63 mm | 160 MPa | 215–265 MPa | 4% |
| H32, 0.63–1.2 mm | 160 MPa | 215–265 MPa | 5% |
| H32, 1.2–6.3 mm | 160 MPa | 215–265 MPa | 7% |
| H34, 1.2–3.2 mm | 180 MPa | 235–285 MPa | 6% |
The undated supplier sheet references its Active Product Menu. Confirm current requirements and thickness-band endpoints for the order. Hulamin 5052 rolled-product datasheet
Kaiser's Tube & Pipe Alloy 5052 Technical Data, marked Rev. 05/06, instead labels its mechanical values typical. It lists O at 195 MPa ultimate/90 MPa yield, H32 at 230/195 MPa and H34 at 260/215 MPa. They describe that source's typical tube/pipe behavior, not rolled-sheet acceptance minima or finished-part design allowables. Kaiser 5052 tube/pipe data, p. 1
Aalco's indicative H32 sheet/treadplate page gives another property summary and expressly warns that requirements depend on temper, product and dimensions. Where supplier summaries differ, resolve the actual product specification and certificate instead of averaging values or selecting the highest strength. Aalco, mechanical-property scope and disclaimer
Forming, machining and finish
For 90° cold forming, Hulamin recommends H32 radii of 1t at 1.6 mm and 1½t at 3.2 mm (t = thickness). Confirm applicability to the actual tooling and orientation. Hulamin 5052 bend guidance
Qualify the intended bend sequence, inside radius, orientation and tooling on representative material. Inspect cracking, thinning, springback and tool marks against explicit acceptance criteria. A successful single bend does not qualify deep drawing or multiple bends with interacting strain. A harder temper should be reviewed for both strength and forming requirements.
For machining, distinguish successful chip removal from dimensional stability and surface quality. Plan stock allowance, workholding, lubrication and inspection for the actual part. Do not convert a qualitative machinability rating into a universal cutting speed or tool-life promise.
Treat treadplate geometry and anti-slip performance as product/application requirements. A patterned surface or the 5052 designation alone does not establish a tested slip rating for a wet or contaminated floor. Similarly, cosmetic anodizing or painted appearance requires a defined finish and an agreed sample, not just chemistry compliance.
Joining and heat-affected-zone strength
Good weldability does not imply that a weld retains the strength of H32 parent stock. Hydro explains that fusion welding softens cold-worked non-heat-treatable aluminum near the weld. Assess weld metal, heat-affected zone and unaffected material separately. Hydro, aluminum welding rods and HAZ behavior
Select filler and procedure for both joined alloys, service conditions and required joint properties. Define preparation, heat input, distortion control, inspection and any leak testing in the manufacturing route. Do not assign an unwelded H32 proof strength to the entire welded assembly or prescribe one filler for every dissimilar joint.
Aalco rates arc/resistance weldability favorably but does not recommend soldering. Such ratings screen processes; they do not specify a qualified procedure, fatigue performance or permissible service temperature. Aalco 5052 H32 joining guidance
What marine descriptions establish
Hulamin describes seawater and marine/industrial atmospheric resistance favorably. This does not establish immersion life or vessel approval. Evaluate exposure, coatings, joints and dissimilar-metal contacts. Hulamin 5052 corrosion description
The Aluminum Association's May 2009 comparative-characteristics footnote provides an important general distinction for 5xxx products: H32 products must not substitute for H116/H321 products whose requirements include different corrosion testing. This does not assert that every such temper is available for 5052; it demonstrates why similar tensile properties and a “marine” description cannot replace the specified alloy/temper/testing combination. Aluminum Association, Table 3.3, footnote 8
For a marine structure or tank, determine the governing design, product and inspection requirements before ordering. Record which corrosion tests, approval scope or certificate provisions are actually required and supplied. An alloy application list cannot establish compliance with those requirements.
Release and traceability
Retain heat/lot identity through cutting and fabrication, including temper and surface condition. Link property values to their source edition, form, dimensional band, test direction and status—typical, minimum, range or design allowable. Release against the ordered specification and inspection results, and preserve any qualifications caused by welding or thermal processing in the finished-part record.