Aluminum 5042-H28
Supply condition
AA 5042 · EN AlMg3.5Mn
H28 = strain hardened and partially annealed, full hard
Over-rolled then partially annealed to full-hard level; chosen when a more uniform, less directional forming response is needed.
Values for the H28 condition
Other 5042 tempers and conditions
5042 is listed in 8 conditions; see the grade overview at 5042.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Softest condition, used as re-roll/intermediate stock or where deep drawing is required before final hardening. | 125 | 255 | 24 | 60 HB | 34 % IACS |
H28This page Strain hardened and partially annealed, full hard | Over-rolled then partially annealed to full-hard level; chosen when a more uniform, less directional forming response is needed. | 305 | 340 | 6 | 94 HB | 33 % IACS |
Strain hardened and stabilized, full hard | Full-hard sheet given a low-temperature stabilizing treatment to lock in properties and avoid age-softening of the high-Mg matrix. | 310 | 340 | 5 | 95 HB | 33 % IACS |
Strain hardened, full hard, then lacquered/painted | Full-hard coil supplied already coil-coated with food-contact lacquer for direct conversion into beverage can ends. | 312 | 345 | 5 | 95 HB | 33 % IACS |
Strain hardened, full hard | Full-hard cold-rolled sheet for closures and tab/end stock where slightly more residual ductility than H19 is wanted. | 315 | 345 | 5 | 96 HB | 32 % IACS |
Strain hardened and stabilized, extra hard | Highest-strength stabilized temper for can ends and tabs where property drift during coil storage and lacquer bake must be avoided. | 325 | 355 | 4 | 99 HB | 33 % IACS |
Strain hardened, extra hard, then lacquered/painted | Coated version of the extra-hard temper for lightweight (down-gauged) can ends. | 328 | 357 | 4 | 99 HB | 32.5 % IACS |
H19Default Strain hardened, extra hard | Standard can-end / closure stock temper: highest as-rolled strength with enough formability for score-and-rivet end conversion. | 331 | 359 | 4 | 100 HB | 32 % IACS |
What is 5042-H28?
5042-H28 is 5042 supplied in the H28 condition — over-rolled then partially annealed to full-hard level; chosen when a more uniform, less directional forming response is needed. 5042-H28 has a yield strength of 305 MPa (44.2 ksi) and a tensile strength of 340 MPa (49.3 ksi) — stronger than 77% of aluminum grades. Elongation at break is 6% and the elastic modulus is 70 GPa (10.2 Msi). 5042-H28 has a density of 2.68 g/cm³ (0.0968 lb/in³), lighter than 72% of aluminum grades. It melts at 585°C (1,085 °F). H19 is the default condition FabDigit quotes; H28 is available on request or by drawing note.
Advantages
- Good corrosion resistance — 73/100, better than 86% of aluminum grades
- High strength — 305 MPa (44.2 ksi), better than 77% of aluminum grades
Limitations
- Limited service temperature — 80°C (176 °F), worse than 94% of aluminum grades
5042-H28 properties
Typical room-temperature values for 5042-H28; 19 are specific to this condition. Other listed values are 5042 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
5042-H28 has a density of 2.68 g/cm³ (0.0968 lb/in³), lighter than 72% of aluminum grades. It melts at 585°C (1,085 °F).
Mechanical12
5042-H28 has a yield strength of 305 MPa (44.2 ksi) and a tensile strength of 340 MPa (49.3 ksi) — stronger than 77% of aluminum grades. Elongation at break is 6% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
5042-H28 is rated for continuous service to 80°C (176 °F). It conducts heat at 127 W/m·K (73.4 BTU/hr·ft·°F), worse than 69% of aluminum grades. Thermal expansion is 23.7 µm/m·K (13.2 µin/in·°F).
Electrical3
5042-H28 conducts electricity at 33 % IACS, worse than 57% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (73/100), better than 86% of aluminum grades.
Sustainability4
Producing a kilogram of 5042-H28 takes about 200 MJ of energy and emits 12 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 40%.
Manufacturability7
5042-H28's machinability is fair (45/100, worse than 72% of aluminum grades); weldability very good (75/100); formability fair (42/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 5042-H28
Is 5042 easy to machine?
Rarely machined in service; if needed use sharp polished high-rake carbide, high speed and flood lubricant to avoid built-up edge on the gummy Al-Mg matrix.
Can 5042 be welded?
Readily GTAW/GMAW weldable with 5183 or 5356 filler; joints in the hard tempers lose strength in the HAZ back toward O-temper values, and resistance/seam welding is common for closure applications.
Can 5042 be formed, bent or molded?
Hard tempers are optimized for high-speed press stamping, scoring and curling of can ends — keep bend lines transverse to rolling direction and use generous radii; anneal or use O temper for deep draws.
What surface finishes work on 5042?
Normally coil-coated with food-grade lacquer over a chromate-free conversion pretreatment; clear or dyed sulfuric anodizing is possible with a slightly grey cast, chemical brightening is fair.
5042 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 |
|---|---|---|
| Si | ≤ 0.2 | 0.08 |
| Fe | ≤ 0.35 | 0.25 |
| Cu | ≤ 0.15 | 0.05 |
| Mn | 0.2 – 0.5 | 0.35 |
| Mgprincipal alloying element | 3 – 4 | 3.5 |
| Cr | ≤ 0.1 | 0.03 |
| Zn | ≤ 0.25 | 0.05 |
| Ti | ≤ 0.1 | 0.02 |
| Others (each)each | ≤ 0.05 | — |
| Others (total)total | ≤ 0.15 | — |
| Al | balance | — |
5042-H28 — frequently asked
What is 5042-H28 used for?
5042-H28 is typically used for beverage can ends, closures and stamped sheet parts. In short: high-strength can-end stock; hard-temper stamping alloy; low elongation, shallow forming.
What is the yield strength of 5042-H28?
5042-H28 has a typical yield strength of 305 MPa (44.2 ksi) and a tensile strength of 340 MPa (49.3 ksi) — stronger than 77% of aluminum grades. Strength varies by condition: see the 8 listed tempers.
Is 5042-H28 easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 72% of aluminum grades). Rarely machined in service; if needed use sharp polished high-rake carbide, high speed and flood lubricant to avoid built-up edge on the gummy Al-Mg matrix.
Can 5042-H28 be welded?
Yes — weldability is rated very good (75/100). Readily GTAW/GMAW weldable with 5183 or 5356 filler; joints in the hard tempers lose strength in the HAZ back toward O-temper values, and resistance/seam welding is common for closure applications.
What surface finishes work on 5042-H28?
Normally coil-coated with food-grade lacquer over a chromate-free conversion pretreatment; clear or dyed sulfuric anodizing is possible with a slightly grey cast, chemical brightening is fair.
Can 5042-H28 be formed, bent or molded?
Hard tempers are optimized for high-speed press stamping, scoring and curling of can ends — keep bend lines transverse to rolling direction and use generous radii; anneal or use O temper for deep draws.
What is the maximum service temperature of 5042-H28?
5042-H28 is rated for continuous use to about 80°C (176 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 5042-H19 and 5042-O?
H19 is the default condition — standard can-end / closure stock temper: highest as-rolled strength with enough formability for score-and-rivet end conversion. O: softest condition, used as re-roll/intermediate stock or where deep drawing is required before final hardening. Yield strength is 331 MPa in H19 versus 125 MPa in O.
Sources
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- ASTM B209 / B209M — Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate — ASTM International (2021)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
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.