Aluminum 5657-H24
Temper
AA 5657 · UNS A95657 · EN AW-5657, AW 5657
H24 = strain hardened and partially annealed, half hard
Equivalent strength level to H25 but supplied with ordinary (non-bright) mill finish coil.
Values for the H24 condition
Other 5657 tempers and conditions
5657 is listed in 7 conditions; see the grade overview at 5657.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Choose for severe stretch forming, deep drawing or spinning of bright trim before final polishing/anodizing. | 40 | 110 | 28 | 22 HB | 55 % IACS |
H24This page Strain hardened and partially annealed, half hard | Equivalent strength level to H25 but supplied with ordinary (non-bright) mill finish coil. | 135 | 160 | 13 | 39 HB | 54 % IACS |
Strain hardened and partially annealed, 1/2 hard | Standard stocked bright-trim temper: enough stiffness for roll-formed mouldings while retaining bend/draw ductility. | 140 | 160 | 12 | 40 HB | 54 % IACS |
Strain hardened and partially annealed, special half-hard temper | Special variation of the H24 half-hard temper for 5657 bright-trim sheet, balancing moderate strength with the surface quality needed for bright anodizing. | 140 | 160 | 12 | 40 HB | 54 % IACS |
Strain hardened and partially annealed, three-quarter hard | Pick when trim sections need more dent resistance and springback control than H25, with only mild bending. | 160 | 175 | 8 | 45 HB | 54 % IACS |
Strain hardened and partially annealed, full hard | Highest strength/stiffness bright sheet for flat panels, nameplates and reflectors with minimal forming. | 180 | 195 | 5 | 50 HB | 54 % IACS |
Strain hardened and stabilized, full hard | Fully cold-worked and thermally stabilized 5657 sheet giving the highest strength of the bright-trim tempers with limited remaining ductility. | 185 | 195 | 6 | 55 HB | 54 % IACS |
What is 5657-H24?
5657-H24 is 5657 in the H24 temper — equivalent strength level to H25 but supplied with ordinary (non-bright) mill finish coil. 5657-H24 has a yield strength of 135 MPa (19.6 ksi) and a tensile strength of 160 MPa (23.2 ksi) — weaker than 72% of aluminum grades. Elongation at break is 13% and the elastic modulus is 69 GPa (10 Msi). 5657-H24 has a density of 2.69 g/cm³ (0.0972 lb/in³), lighter than 67% of aluminum grades. It melts at 638°C (1,180 °F).
Advantages
- Polishes to a fine finish — 95/100, better than 100% of aluminum grades
- High electrical conductivity — 54 % IACS, better than 92% of aluminum grades
- Conducts heat well — 176 W/m·K (101.7 BTU/hr·ft·°F), better than 86% of aluminum grades
- Forms and bends easily — 72/100, better than 85% of aluminum grades
- Ductile — tolerates forming and impact — 13%, better than 79% of aluminum grades
Limitations
- Difficult to machine — 30/100, worse than 92% of aluminum grades
- Limited service temperature — 110°C (230 °F), worse than 89% of aluminum grades
5657-H24 properties
Typical room-temperature values for 5657-H24; 19 are specific to this condition. Other listed values are 5657 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
5657-H24 has a density of 2.69 g/cm³ (0.0972 lb/in³), lighter than 67% of aluminum grades. It melts at 638°C (1,180 °F).
Mechanical10
5657-H24 has a yield strength of 135 MPa (19.6 ksi) and a tensile strength of 160 MPa (23.2 ksi) — weaker than 72% of aluminum grades. Elongation at break is 13% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
5657-H24 is rated for continuous service to 110°C (230 °F). It conducts heat at 176 W/m·K (101.7 BTU/hr·ft·°F), better than 86% of aluminum grades. Thermal expansion is 23.8 µm/m·K (13.2 µin/in·°F).
Electrical3
5657-H24 conducts electricity at 54 % IACS, better than 92% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), better than 67% of aluminum grades.
Sustainability4
Producing a kilogram of 5657-H24 takes about 205 MJ of energy and emits 12.5 kg of CO₂ — more than 76% of aluminum grades. Typical recycled content is 12%.
Manufacturability7
5657-H24's machinability is poor (30/100, worse than 92% of aluminum grades); weldability very good (70/100); formability very good (72/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 5657-H24
Is 5657 easy to machine?
Soft and gummy — use polished high-rake carbide, high speed, flood lubricant to prevent built-up edge and smearing of the show surface.
Can 5657 be welded?
Readily GTAW/GMAW welded with 5356 filler, but the HAZ anneals and welds anodize a different shade, so joints should be hidden or mechanically fastened instead.
Can 5657 be formed, bent or molded?
Excellent roll forming, bending and drawing in O/H25; protect the bright surface with PVC film and use clean, polished, chrome-free tooling to avoid pick-up marks.
What surface finishes work on 5657?
Designed for chemical/electro-brightening then clear or colour anodizing; buffing before anodize yields mirror trim, and film clarity depends on keeping Fe/Si low.
5657 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Mgsole strengthening addition | 0.6 – 1 | 0.8 |
| Siheld low for bright anodizing | ≤ 0.08 | — |
| Feheld low to avoid grey haze in anodic film | ≤ 0.1 | — |
| Cu | ≤ 0.1 | — |
| Mn | ≤ 0.03 | — |
| Zn | ≤ 0.05 | — |
| Gaspecifically limited for optical brightness | ≤ 0.03 | — |
| V | ≤ 0.05 | — |
| Others (each)total 0.05 max | ≤ 0.02 | — |
| Alremainder, high-purity base | balance | — |
5657-H24 — frequently asked
What is 5657-H24 used for?
5657-H24 is typically used for automotive exterior trim and mouldings, lighting and luminaire reflectors, appliance decorative panels, anodized nameplates and badges, bright roll-formed edge strips and mirror-finish interior trim. In short: super-bright anodizing sheet.
What is the yield strength of 5657-H24?
5657-H24 has a typical yield strength of 135 MPa (19.6 ksi) and a tensile strength of 160 MPa (23.2 ksi) — weaker than 72% of aluminum grades. Strength varies by condition: see the 7 listed tempers.
Is 5657-H24 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 92% of aluminum grades). Soft and gummy — use polished high-rake carbide, high speed, flood lubricant to prevent built-up edge and smearing of the show surface.
Can 5657-H24 be welded?
Yes — weldability is rated very good (70/100). Readily GTAW/GMAW welded with 5356 filler, but the HAZ anneals and welds anodize a different shade, so joints should be hidden or mechanically fastened instead.
What surface finishes work on 5657-H24?
Designed for chemical/electro-brightening then clear or colour anodizing; buffing before anodize yields mirror trim, and film clarity depends on keeping Fe/Si low.
Can 5657-H24 be formed, bent or molded?
Excellent roll forming, bending and drawing in O/H25; protect the bright surface with PVC film and use clean, polished, chrome-free tooling to avoid pick-up marks.
What is the maximum service temperature of 5657-H24?
5657-H24 is rated for continuous use to about 110°C (230 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 5657-H24?
Yes — 5657-H24 is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- Aluminum Standards and Data (mechanical property limits, 5000-series sheet) — The Aluminum Association (2017)
- EN 573-3 / EN 485-2 — wrought aluminium alloy composition and sheet properties — CEN (2019)
- ASTM B209 — Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate — ASTM International (2021)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials (aluminium alloys) — ASM International (2005)
- Alloy 5657 sheet property listings — MatWeb (2024)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.