Aluminum 5554-O (Annealed)
Temper
AA 5554 · UNS A95554 · EN AW-5554, AlMg2.7Mn
Softest, most formable condition; use for deep drawing or when maximum ductility and SCC immunity are wanted.
Values for the O condition
Other 5554 tempers and conditions
5554 is listed in 5 conditions; see the grade overview at 5554.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
OThis page Annealed | Softest, most formable condition; use for deep drawing or when maximum ductility and SCC immunity are wanted. | 117 | 250 | 25 | 62 HB | 34 % IACS |
AS-WELDEDDefault ER5554 all-weld-metal deposit (GMAW/GTAW) | Default condition for a filler alloy: properties of the deposited bead when welding 5454 or other 5000-series base metal. | 125 | 255 | 17 | 62 HB | 34 % IACS |
Strain hardened from hot working only | Hot-rolled/extruded stock with guaranteed minimums; economical for thick plate and heavy extruded shapes. | 130 | 250 | 18 | 65 HB | 34 % IACS |
Strain hardened and stabilized, quarter hard | Stabilized quarter-hard sheet: good balance of strength and forming for tank and tanker bodies. | 200 | 270 | 18 | 73 HB | 34 % IACS |
Strain hardened and stabilized, half hard | Higher-strength stabilized sheet for wheel rims and pressure-vessel shells where less forming is needed. | 220 | 290 | 14 | 81 HB | 34 % IACS |
What is 5554-O?
5554-O is 5554 in the O temper — softest, most formable condition; use for deep drawing or when maximum ductility and SCC immunity are wanted. 5554-O has a yield strength of 117 MPa (17 ksi) and a tensile strength of 250 MPa (36.3 ksi) — weaker than 78% of aluminum grades. Elongation at break is 25% and the elastic modulus is 70 GPa (10.2 Msi). 5554-O has a density of 2.69 g/cm³ (0.0972 lb/in³), lighter than 67% of aluminum grades. It melts at 602°C (1,116 °F). AS-WELDED is the default condition FabDigit quotes; O is available on request or by drawing note.
Advantages
- Readily welded — 92/100, better than 95% of aluminum grades
- Ductile — tolerates forming and impact — 25%, better than 94% of aluminum grades
- Forms and bends easily — 90/100, better than 93% of aluminum grades
- Good corrosion resistance — 76/100, better than 90% of aluminum grades
Limitations
- Difficult to machine — 35/100, worse than 86% of aluminum grades
- Low strength — 117 MPa (17 ksi), worse than 78% of aluminum grades
5554-O properties
Typical room-temperature values for 5554-O; 11 are specific to this condition. Other listed values are 5554 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
5554-O has a density of 2.69 g/cm³ (0.0972 lb/in³), lighter than 67% of aluminum grades. It melts at 602°C (1,116 °F).
Mechanical10
5554-O has a yield strength of 117 MPa (17 ksi) and a tensile strength of 250 MPa (36.3 ksi) — weaker than 78% of aluminum grades. Elongation at break is 25% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
5554-O is rated for continuous service to 150°C (302 °F). It conducts heat at 134 W/m·K (77.4 BTU/hr·ft·°F), worse than 60% of aluminum grades. Thermal expansion is 23.6 µm/m·K (13.1 µin/in·°F).
Electrical3
5554-O conducts electricity at 34 % IACS, worse than 52% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (76/100), better than 90% of aluminum grades.
Sustainability4
Producing a kilogram of 5554-O takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 25%.
Manufacturability8
5554-O's machinability is fair (35/100, worse than 86% of aluminum grades); weldability excellent (92/100); formability excellent (90/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 5554-O
Is 5554 easy to machine?
Soft and gummy — use sharp polished high-rake carbide, high surface speed and flood coolant or emulsion to stop chip welding.
Can 5554 be welded?
Designed as filler: GMAW/GTAW 5554 on 5454 (and other Mg<3% 5000 series) for service to ~150 °C; use argon, DCEP spray or AC TIG, and keep 5356/5183 away from hot service joints.
Can 5554 be formed, bent or molded?
Annealed and H32 sheet form readily; allow generous bend radii in H34 and expect springback typical of Al-Mg.
What surface finishes work on 5554?
Takes clear and hard anodize well and paints/powder-coats with a chromate-free pretreatment; weld beads may shade slightly differently from base metal after anodizing.
5554 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 | ≤ 0.25 | 0.1 |
| Fe | ≤ 0.4 | 0.2 |
| Cu | ≤ 0.1 | 0.02 |
| Mn | 0.5 – 1 | 0.75 |
| Mgheld below 3% to avoid β-phase sensitization at elevated temperature | 2.4 – 3 | 2.7 |
| Cr | 0.05 – 0.2 | 0.12 |
| Zn | ≤ 0.25 | 0.05 |
| Tigrain refiner, distinguishes 5554 from 5454 | 0.05 – 0.2 | 0.1 |
| Others (each)0.15 max total | ≤ 0.05 | — |
| Al | balance | — |
5554-O — frequently asked
What is 5554-O used for?
5554-O is typically used for elevated-temperature tank welding, wheel fabrication welds and chemical process equipment. In short: filler for 5454; hot-service 5000-series consumable; no sensitization above 65 C.
What is the yield strength of 5554-O?
5554-O has a typical yield strength of 117 MPa (17 ksi) and a tensile strength of 250 MPa (36.3 ksi) — weaker than 78% of aluminum grades. Strength varies by condition: see the 5 listed tempers.
Is 5554-O easy to machine?
Not especially — machinability is rated fair (35/100, worse than 86% of aluminum grades). Soft and gummy — use sharp polished high-rake carbide, high surface speed and flood coolant or emulsion to stop chip welding.
Can 5554-O be welded?
Yes — weldability is rated excellent (92/100). Designed as filler: GMAW/GTAW 5554 on 5454 (and other Mg<3% 5000 series) for service to ~150 °C; use argon, DCEP spray or AC TIG, and keep 5356/5183 away from hot service joints.
What surface finishes work on 5554-O?
Takes clear and hard anodize well and paints/powder-coats with a chromate-free pretreatment; weld beads may shade slightly differently from base metal after anodizing.
Can 5554-O be formed, bent or molded?
Annealed and H32 sheet form readily; allow generous bend radii in H34 and expect springback typical of Al-Mg.
What is the maximum service temperature of 5554-O?
5554-O is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 5554 AS-WELDED and 5554-H34?
AS-WELDED is the default condition — default condition for a filler alloy: properties of the deposited bead when welding 5454 or other 5000-series base metal. H34: higher-strength stabilized sheet for wheel rims and pressure-vessel shells where less forming is needed. Yield strength is 125 MPa in AS-WELDED versus 220 MPa in H34.
Sources
- AWS A5.10/A5.10M Specification for Bare Aluminum and Aluminum-Alloy Welding Electrodes and Rods — AWS (2021)
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- 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)
- EN ISO 18273 / EN AW-5554 filler metal designation — CEN/ISO (2021)
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.