Aluminum 6105
AA 6105 · UNS A96105 · EN AW-6105
6105 (A96105, EN AW-6105) is a medium-strength Al-Mg-Si extrusion alloy positioned between 6063 and 6061 for architectural and structural profiles.
Reference datasheet — 6105 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the T5 condition
6105 tempers and conditions
6105 is supplied in 5 conditions, soft to hard. T5 is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Softest condition, used only when profiles must be heavily bent or re-formed before ageing. | 55 | 110 | 25 | 30 HB | 52 % IACS |
Cooled from hot working and naturally aged | Choose when profiles must still be bent, punched or roll-formed after extrusion; strength is about 60 % of T5. | 97 | 152 | 16 | 47 HB | 44 % IACS |
Solution heat treated and naturally aged | Occasional order-temper for parts fabricated after solution treatment and later aged to T6; not a stock item. | 110 | 205 | 20 | 60 HB | 42 % IACS |
T5Default Cooled from hot working and artificially aged | Standard stocked condition for structural and architectural profiles needing ~240 MPa yield straight off the press line. | 241 | 262 | 10 | 76 HB | 47 % IACS |
Solution heat treated and artificially aged | Off-press-quench route used when maximum and most uniform strength through thick sections is required; rarely stocked for 6105. | 255 | 290 | 10 | 85 HB | 45 % IACS |
What is 6105?
6105 (A96105, EN AW-6105) is a medium-strength Al-Mg-Si extrusion alloy positioned between 6063 and 6061 for architectural and structural profiles. In T5/T6 it gives 241 MPa yield, 262 MPa tensile, 10% elongation, 76 HB and a 69 GPa modulus, with 47% IACS conductivity, 180 W/m·K and a uniform anodizing response. Service is limited to about 150 °C, formability in the aged tempers is moderate, and welding drops HAZ strength toward T4 level unless the part is re-aged. 6063 is the alternative when surface finish and thin walls matter more than strength. 6105 has a density of 2.69 g/cm³ (0.0972 lb/in³), lighter than 67% of aluminum grades. It melts at 615°C (1,139 °F). 6105 has a yield strength of 241 MPa (35 ksi) and a tensile strength of 262 MPa (38 ksi) — stronger than 64% of aluminum grades. Elongation at break is 10% and the elastic modulus is 69 GPa (10 Msi).
What is 6105 used for?
- architectural extrusions
- railings
- structural sections
- ladders
Advantages
- High electrical conductivity — 47 % IACS, better than 88% of aluminum grades
- Conducts heat well — 180 W/m·K (104 BTU/hr·ft·°F), better than 86% of aluminum grades
- Polishes to a fine finish — 65/100, better than 82% of aluminum grades
- Good corrosion resistance — 68/100, better than 75% of aluminum grades
6105 properties
Typical room-temperature values for 6105-T5; bars are the position among aluminum grades.
Physical3
6105 has a density of 2.69 g/cm³ (0.0972 lb/in³), lighter than 67% of aluminum grades. It melts at 615°C (1,139 °F).
Mechanical12
6105 has a yield strength of 241 MPa (35 ksi) and a tensile strength of 262 MPa (38 ksi) — stronger than 64% of aluminum grades. Elongation at break is 10% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
6105 is rated for continuous service to 150°C (302 °F). It conducts heat at 180 W/m·K (104 BTU/hr·ft·°F), better than 86% of aluminum grades. Thermal expansion is 23.4 µm/m·K (13 µin/in·°F).
Electrical3
6105 conducts electricity at 47 % IACS, better than 88% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (68/100), better than 75% of aluminum grades.
Sustainability4
Producing a kilogram of 6105 takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 35%.
Manufacturability8
6105's machinability is good (55/100, worse than 59% of aluminum grades); weldability very good (75/100); formability fair (40/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the aluminum family
Yield strength against density for every aluminum grade FabDigit runs. 6105 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 6105
Is 6105 easy to machine?
Machines like 6061-T6 with sharp polished-flute carbide tools, high speed and flood or MQL lubrication; T1/O tempers gum up and give stringy chips.
Can 6105 be welded?
Readily GMAW/GTAW welded with 4043 (general) or 5356 (higher strength/anodizing match); expect HAZ strength to fall toward T4-level unless re-aged.
Can 6105 be formed, bent or molded?
Extrudes well at moderate press speeds; bend and punch in T1 and age to T5/T6 afterwards, since T5 profiles need generous bend radii (≥3t).
6105 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 | 0.6 – 1 | 0.8 |
| Feimpurity limit | ≤ 0.35 | |
| Cu | ≤ 0.1 | |
| Mn | ≤ 0.15 | |
| Mg | 0.45 – 0.8 | 0.62 |
| Cr | ≤ 0.1 | |
| Zn | ≤ 0.1 | |
| Ti | ≤ 0.1 | |
| Others (each) | ≤ 0.05 | |
| Others (total) | ≤ 0.15 | |
| Al | balance |
What surface finishes work on 6105?
Takes clear and colour anodize uniformly and accepts chromate/chrome-free conversion coats and powder coat; mechanical polishing gives a good but not mirror finish because of Mg2Si/Si particles.
Surface treatments FabDigit runs on aluminum parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Equivalent designations
Standards and trade names that resolve to Aluminum 6105 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- A96105
- EN / DIN / Werkstoff-Nr.
- AW-6105
How much does 6105 cost?
6105 is a standard-cost aluminum ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
6105 — frequently asked
What is 6105 used for?
6105 is typically used for architectural extrusions, railings, structural sections and ladders. In short: stronger than 6063; good anodizing response; general structural extrusion alloy.
What is the yield strength of 6105?
6105 has a typical yield strength of 241 MPa (35 ksi) and a tensile strength of 262 MPa (38 ksi) — stronger than 64% of aluminum grades. Strength varies by condition: see the 5 listed tempers.
Is 6105 easy to machine?
Reasonably — machinability is rated good (55/100, worse than 59% of aluminum grades). Machines like 6061-T6 with sharp polished-flute carbide tools, high speed and flood or MQL lubrication; T1/O tempers gum up and give stringy chips.
Can 6105 be welded?
Yes — weldability is rated very good (75/100). Readily GMAW/GTAW welded with 4043 (general) or 5356 (higher strength/anodizing match); expect HAZ strength to fall toward T4-level unless re-aged.
What surface finishes work on 6105?
Takes clear and colour anodize uniformly and accepts chromate/chrome-free conversion coats and powder coat; mechanical polishing gives a good but not mirror finish because of Mg2Si/Si particles.
Can 6105 be formed, bent or molded?
Extrudes well at moderate press speeds; bend and punch in T1 and age to T5/T6 afterwards, since T5 profiles need generous bend radii (≥3t).
What is the maximum service temperature of 6105?
6105 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 6105-T5 and 6105-O?
T5 is the default condition — standard stocked condition for structural and architectural profiles needing ~240 MPa yield straight off the press line. O: softest condition, used only when profiles must be heavily bent or re-formed before ageing. Yield strength is 241 MPa in T5 versus 55 MPa in O.
How much does 6105 cost?
6105 is a standard-cost aluminum ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM B221 — Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles and Tubes — ASTM International (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)
- Aluminum Design Manual — The Aluminum Association (2020)
- EN 573-3 / EN 755-2 (EN AW-6105 designation and extruded product properties) — CEN (2019)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.