5086-H112 Aluminum
A 5000-series Al-Mg alloy, between 5052 and 5083 in strength
Typical values for the temper in the title
5086 contains about 4% magnesium plus some manganese and chromium. It is not heat treatable, and its strength comes from magnesium and strain hardening. In the H112 temper the tensile strength is 240–290 MPa.
It sits between 5052 and 5083: stronger than 5052, and a little easier to form than 5083. It is a common alloy for boat hulls, tanks and welded marine structures, where strength, weldability and seawater resistance are needed together.
Mechanical and physical properties
| Property | Value | Note |
|---|---|---|
| Tensile strength Rm | 240–290 MPa | |
| Yield strength Rp0.2 | 95–205 MPa | |
| Elongation A | 14% | |
| Hardness | 65–75 HB | |
| Modulus of elasticity E | 71 GPa | |
| Density ρ | 2.66 g/cm³ | |
| Machinability | 50% | relative rating in the site database |
Chemical composition (wt %)
| Element | Range | Role |
|---|---|---|
| Mg magnesium | 3.5–4.5 | dissolved in the aluminum, gives the strength |
| Mn manganese | 0.20–0.7 | adds strength and controls the grains |
| Cr chromium | 0.05–0.25 | controls the grain structure |
| Fe iron | max 0.50 | |
| Si silicon | max 0.40 | |
| Zn zinc | max 0.25 | |
| Ti titanium | max 0.15 | |
| Cu copper | max 0.10 | |
| Others | max 0.05 each, 0.15 total | |
| Al aluminum | balance |
Common tempers
As in all of the 5000 series, the temper describes the degree of strain hardening.
| Temper | Properties | When to choose it |
|---|---|---|
| O / H111 | minimum strength | for forming and welded structures |
| H112 | as fabricated | general plate |
| H116 | strain hardened and corrosion tested | for marine service: proven resistance to intergranular and exfoliation corrosion |
| H32 / H34 | quarter or half hard | when more strength is needed in sheet that will not be welded |
Applications
- Boat hulls and marine structures
- Tanks and pressure vessels
- Welded structures in humid environments
- Transport structures
- Sheet metal parts for marine environments
Fabrication
Welding
Welds excellently with TIG and MIG, usually with ER5356 or ER5183 filler. The strength loss in the weld zone is limited.
Machining
Soft, prone to smearing and to long chips. Sharp tools with a large positive rake help, and harder tempers machine better.
Heat and corrosion
Excellent seawater resistance. As with 5083, prolonged service above about 65 °C can sensitize it and make it vulnerable to intergranular corrosion.
Compared with similar materials
| Material | Rm / Rp0.2 | Welding | When it is the better choice |
|---|---|---|---|
| 5083-H111 | 275–350 / 125–200 MPa | Excellent — ER5356 | when more strength is needed in a welded marine structure · material page |
| 5052-H32 | 230–260 / 195–210 MPa | Good | when strength matters less and easy bending is needed · material page |
| 5454-H32 | 248 / 193 MPa | Excellent | for elevated-temperature service, where 5086 risks sensitization · material page |
Common mistakes
Using 5086 at elevated temperature
In prolonged service above about 65 °C the material becomes susceptible to corrosion. For hot service, 5454 is the better choice.
Ordering for a boat without a marine temper
For marine service, ask for H116, which is corrosion tested. H112 alone does not guarantee this.
Expecting strengthening from heat treatment
5086 is not heat treatable. Its strength is set only by cold work.
Equivalents, standards and supply
| EN | 3.3545 |
|---|---|
| DIN | AlMg4 |
| JIS | A5086 |
| Standards | ASTM B209 / EN 485-2 |
| Forms | plate · pipe |
| Producers | Hydro · Novelis · Alcoa · Kaiser |
Learn more
Values are typical and for comparison only. For design, rely on the standard and on the mill certificate. Sources: Aluminum Association (composition), ASM and MatWeb data sheets, and the METAL HUB materials database.
Updated: October 31, 2026