Aluminum AlSi7Mg0.6
EN AlSi7Mg0.6
AlSi7Mg0.6 (EN AC-42200, A357.0) is a hypoeutectic Al-Si-Mg alloy for laser powder bed fusion, carrying more magnesium than AlSi10Mg to give a stronger response to T6 heat treatment.
Reference datasheet — AlSi7Mg0.6 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 T6 condition
AlSi7Mg0.6 tempers and conditions
AlSi7Mg0.6 is supplied in 6 conditions, soft to hard. T6 is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Stress relieved | Standard build-plate stress relief before part removal; softens the structure but maximises ductility and dimensional stability. | 210 | 300 | 13 | 83 HB | 38 % IACS |
As built (as printed) | Highest as-printed strength from the ultrafine cellular Si network; choose when residual stress and distortion are acceptable and no thermal exposure follows. | 250 | 400 | 7 | 108 HB | 26 % IACS |
T6 variant, underaged | Pick when elongation and damage tolerance matter more than peak strength, e.g. crash- or fatigue-critical brackets. | 255 | 330 | 13 | 96 HB | 41 % IACS |
hot isostatic pressing (≈500–520 °C / 100 MPa) followed by solution treatment and ageing | Closes residual gas porosity to cut fatigue scatter; specified for flight-critical and cyclically loaded AM hardware. | 280 | 350 | 14 | 102 HB | 40 % IACS |
T6Default Solution heat treated and artificially aged | Default aerospace condition: balanced strength, ductility and fatigue life with a homogeneous spheroidised Si structure. | 285 | 355 | 10 | 105 HB | 39 % IACS |
Cooled from hot working and artificially aged | Cheapest strengthening route: no solution treatment or quench, so geometry stays true while strength rises above as-built. | 300 | 420 | 6 | 115 HB | 31 % IACS |
What is AlSi7Mg0.6?
AlSi7Mg0.6 (EN AC-42200, A357.0) is a hypoeutectic Al-Si-Mg alloy for laser powder bed fusion, carrying more magnesium than AlSi10Mg to give a stronger response to T6 heat treatment. Engineers select it for printed aerospace brackets and thin-wall parts that replace castings, reaching 285 MPa yield, 355 MPa tensile, 10% elongation and 105 HB with 155 W/m·K conductivity. Properties depend heavily on condition (AB, SR, T5, T6, T61, HIP+T6), service is limited to 150 °C and machinability is moderate at 65; AlSi10Mg is the lower-cost option when as-built strength is sufficient. AlSi7Mg0.6 has a density of 2.67 g/cm³ (0.0965 lb/in³), lighter than 78% of aluminum grades. It melts at 555°C (1,031 °F). AlSi7Mg0.6 has a yield strength of 285 MPa (41.3 ksi) and a tensile strength of 355 MPa (51.5 ksi) — stronger than 73% of aluminum grades. Elongation at break is 10% and the elastic modulus is 72 GPa (10.4 Msi).
What is AlSi7Mg0.6 used for?
- aerospace brackets
- thin-wall castings-replacement parts
- heat-treated structural AM parts
- automotive lightweight components
AlSi7Mg0.6 properties
Typical room-temperature values for AlSi7Mg0.6-T6; bars are the position among aluminum grades.
Physical3
AlSi7Mg0.6 has a density of 2.67 g/cm³ (0.0965 lb/in³), lighter than 78% of aluminum grades. It melts at 555°C (1,031 °F).
Mechanical15
AlSi7Mg0.6 has a yield strength of 285 MPa (41.3 ksi) and a tensile strength of 355 MPa (51.5 ksi) — stronger than 73% of aluminum grades. Elongation at break is 10% and the elastic modulus is 72 GPa (10.4 Msi).
Thermal6
AlSi7Mg0.6 is rated for continuous service to 150°C (302 °F). It conducts heat at 155 W/m·K (89.6 BTU/hr·ft·°F), better than 71% of aluminum grades. Thermal expansion is 21.5 µm/m·K (11.9 µin/in·°F).
Electrical3
AlSi7Mg0.6 conducts electricity at 39 % IACS, better than 65% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), better than 57% of aluminum grades.
Sustainability4
Producing a kilogram of AlSi7Mg0.6 takes about 215 MJ of energy and emits 13.5 kg of CO₂ — more than 93% of aluminum grades. Typical recycled content is 10%.
Manufacturability8
AlSi7Mg0.6's machinability is good (65/100, better than 62% of aluminum grades); weldability good (65/100); formability poor (20/100).
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. AlSi7Mg0.6 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with AlSi7Mg0.6
Is AlSi7Mg0.6 easy to machine?
Machines easily with polished-flute carbide or PCD tooling at high speed and generous coolant; abrasive Si particles wear HSS quickly and the alloy smears if feeds are too light.
Can AlSi7Mg0.6 be welded?
Laser and TIG weldable with 4043/4047 filler; expect Mg burn-off, hot-crack sensitivity in restrained joints, and re-heat-treatment to restore T6 properties.
Can AlSi7Mg0.6 be formed, bent or molded?
Not a wrought forming alloy — shaped by LPBF or casting; on the printer it needs 45° overhang support, a preheated plate (100–200 °C) and stress relief before build-plate removal.
AlSi7Mg0.6 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 | 6.5 – 7.5 | 7 |
| Mghigher than AlSi10Mg; drives Mg2Si age hardening | 0.45 – 0.7 | 0.6 |
| Tigrain refiner | 0.08 – 0.25 | 0.15 |
| Fekept low to avoid brittle β-AlFeSi platelets | ≤ 0.19 | 0.1 |
| Cu | ≤ 0.05 | |
| Mn | ≤ 0.1 | |
| Zn | ≤ 0.07 | |
| Beonly in the US A357.0 variant (0.04–0.07 Be); EN AC-42200 and most AM powders are Be-free | ≤ 0.07 | |
| Others (each)total ≤0.10 | ≤ 0.03 | |
| Al | balance |
What surface finishes work on AlSi7Mg0.6?
Blast/tumble to remove partially melted powder, then chemical conversion coating or hard anodize (dark grey); shot peening or machining of critical surfaces markedly improves fatigue life.
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 AlSi7Mg0.6 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- AC-42200
- Other
- A357
- Similar grades
- A357.0ISO/ASTM 52907
How much does AlSi7Mg0.6 cost?
AlSi7Mg0.6 is a high-cost aluminum ($$$$), pricier than about 78% 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.
AlSi7Mg0.6 — frequently asked
What is AlSi7Mg0.6 used for?
AlSi7Mg0.6 is typically used for aerospace brackets, thin-wall castings-replacement parts, heat-treated structural AM parts and automotive lightweight components. In short: highest-elongation LPBF Al-Si; strong T6 heat-treat response; fatigue-critical AM alloy.
What is the yield strength of AlSi7Mg0.6?
AlSi7Mg0.6 has a typical yield strength of 285 MPa (41.3 ksi) and a tensile strength of 355 MPa (51.5 ksi) — stronger than 73% of aluminum grades. Strength varies by condition: see the 6 listed tempers.
Is AlSi7Mg0.6 easy to machine?
Reasonably — machinability is rated good (65/100, better than 62% of aluminum grades). Machines easily with polished-flute carbide or PCD tooling at high speed and generous coolant; abrasive Si particles wear HSS quickly and the alloy smears if feeds are too light.
Can AlSi7Mg0.6 be welded?
Yes — weldability is rated good (65/100). Laser and TIG weldable with 4043/4047 filler; expect Mg burn-off, hot-crack sensitivity in restrained joints, and re-heat-treatment to restore T6 properties.
What surface finishes work on AlSi7Mg0.6?
Blast/tumble to remove partially melted powder, then chemical conversion coating or hard anodize (dark grey); shot peening or machining of critical surfaces markedly improves fatigue life.
Can AlSi7Mg0.6 be formed, bent or molded?
Not a wrought forming alloy — shaped by LPBF or casting; on the printer it needs 45° overhang support, a preheated plate (100–200 °C) and stress relief before build-plate removal.
What is the maximum service temperature of AlSi7Mg0.6?
AlSi7Mg0.6 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 AlSi7Mg0.6-T6 and AlSi7Mg0.6-SR?
T6 is the default condition — default aerospace condition: balanced strength, ductility and fatigue life with a homogeneous spheroidised Si structure. SR: standard build-plate stress relief before part removal; softens the structure but maximises ductility and dimensional stability. Yield strength is 285 MPa in T6 versus 210 MPa in SR.
How much does AlSi7Mg0.6 cost?
AlSi7Mg0.6 is a high-cost aluminum ($$$$), pricier than about 78% 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
- EN 1706 — Aluminium and aluminium alloys, castings (EN AC-42200 AlSi7Mg0.6) — CEN (2020)
- ISO/ASTM 52907 — Additive manufacturing, feedstock materials, methods to characterize metal powders — ISO/ASTM (2019)
- AMS 4289 / ASTM B108 — A357.0 aluminium alloy castings — SAE / ASTM (2019)
- ASM Handbook Vol. 2 — Properties of Aluminum Casting Alloys (A357.0) — ASM International (1990)
- LPBF material datasheets for AlSi7Mg0.6 / A357 powder — EOS / SLM Solutions / Renishaw / Höganäs (2023)
- AM alloy property compilations (as-built, stress-relieved, T5/T6/T61, HIP) — Senvol / MMPDS-adjacent AM literature (2023)
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.