Aluminum 2030-T851
Temper
AA 2030 · UNS A92030 · EN AW-2030, AW 2030
T851 = t8, stress relieved by stretching
Artificially aged and stress relieved: for close-tolerance turned parts needing the highest strength.
Values for the T851 condition
Other 2030 tempers and conditions
2030 is listed in 8 conditions; see the grade overview at 2030.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Annealed bar for maximum ductility before forming or before a full heat-treat cycle. | 85 | 190 | 20 | 48 HB | 45 % IACS |
Extruded, solution treated, stress-relieved by stretching, minor… | Free-machining Al-Cu-Pb-Mg extrusion solution treated and naturally aged, stress-relieved by stretching with a light straightening pass for tight straightness on bar/rod destined for high-speed turning. | 265 | 395 | 12 | 105 HB | 38 % IACS |
T4 plus stress relief by stretching, no further straightening | Extruded bar/profile version of T4 with residual stress removed for stable machining; T4511 permits minor straightening. | 275 | 390 | 12 | 98 HB | 30 % IACS |
T3, stress relieved by stretching | Choose when machined parts must stay dimensionally stable after heavy stock removal. | 280 | 395 | 12 | 100 HB | 33 % IACS |
Solution heat treated and naturally aged | The standard stocked condition for 2030 free-machining bar: 2024-like strength with best-in-class machinability. | 285 | 400 | 12 | 100 HB | 32 % IACS |
Solution heat treated, cold worked and naturally aged | Cold-drawn free-machining bar: highest natural-age strength with excellent chip control for automatic lathes. | 310 | 410 | 10 | 105 HB | 33 % IACS |
T851This page T8, stress relieved by stretching | Artificially aged and stress relieved: for close-tolerance turned parts needing the highest strength. | 370 | 425 | 8 | 118 HB | 38 % IACS |
Solution heat treated, cold worked and artificially aged | Pick for maximum strength and dimensional stability at slightly higher temperature; ductility drops. | 380 | 430 | 8 | 120 HB | 40 % IACS |
What is 2030-T851?
2030-T851 is 2030 in the T851 temper — artificially aged and stress relieved: for close-tolerance turned parts needing the highest strength. 2030-T851 has a yield strength of 370 MPa (53.7 ksi) and a tensile strength of 425 MPa (61.6 ksi) — stronger than 85% of aluminum grades. Elongation at break is 8% and the elastic modulus is 73 GPa (10.6 Msi). 2030-T851 has a density of 2.82 g/cm³ (0.102 lb/in³), heavier than 89% of aluminum grades. It melts at 510°C (950 °F).
Advantages
- Easy to machine — 90/100, better than 98% of aluminum grades
- High strength — 370 MPa (53.7 ksi), better than 85% of aluminum grades
Limitations
- Difficult to weld — 12/100, worse than 98% of aluminum grades
- Needs corrosion protection — 33/100, worse than 91% of aluminum grades
2030-T851 properties
Typical room-temperature values for 2030-T851; 22 are specific to this condition. Other listed values are 2030 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
2030-T851 has a density of 2.82 g/cm³ (0.102 lb/in³), heavier than 89% of aluminum grades. It melts at 510°C (950 °F).
Mechanical12
2030-T851 has a yield strength of 370 MPa (53.7 ksi) and a tensile strength of 425 MPa (61.6 ksi) — stronger than 85% of aluminum grades. Elongation at break is 8% and the elastic modulus is 73 GPa (10.6 Msi).
Thermal6
2030-T851 is rated for continuous service to 150°C (302 °F). It conducts heat at 150 W/m·K (86.7 BTU/hr·ft·°F), better than 58% of aluminum grades. Thermal expansion is 23 µm/m·K (12.8 µin/in·°F).
Electrical3
2030-T851 conducts electricity at 38 % IACS, better than 61% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is poor (33/100), worse than 91% of aluminum grades.
Sustainability4
Producing a kilogram of 2030-T851 takes about 205 MJ of energy and emits 12.5 kg of CO₂ — more than 76% of aluminum grades. Typical recycled content is 10%.
Manufacturability7
2030-T851's machinability is excellent (90/100, better than 98% of aluminum grades); weldability not recommended (12/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 2030-T851
Is 2030 easy to machine?
Outstanding for high-speed automatic turning — free-breaking chips, mirror-like bores; use sharp positive-rake carbide, high speed, light lubricity coolant, and collect Pb-bearing chips separately.
Can 2030 be welded?
Not recommended for fusion welding (hot cracking from Pb/Bi and high Cu); join by threading, press fitting, riveting or adhesives, or use friction/resistance methods with qualification.
Can 2030 be formed, bent or molded?
Formability is limited in T3/T4/T8; do bending and heading in O or freshly solution-treated condition and keep radii generous.
What surface finishes work on 2030?
Requires protection: chromate/Ti-Zr conversion coat plus paint or hard anodize; decorative or clear anodizing is streaky, and electroplating needs a specialised pre-treatment for the Pb phase.
2030 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 | ≤ 0.8 | 0.4 |
| Fe | ≤ 0.7 | 0.4 |
| Cumain strengthening addition | 3.3 – 4.5 | 4 |
| Mn | 0.2 – 1 | 0.6 |
| Mg | 0.5 – 1.3 | 0.9 |
| Cr | ≤ 0.1 | — |
| Ni | ≤ 0.2 | — |
| Zn | ≤ 0.5 | — |
| Pbfree-machining phase; RoHS/food-contact restrictions | 0.8 – 1.5 | 1.1 |
| Bi | ≤ 0.2 | 0.1 |
| Ti+Zr | ≤ 0.2 | — |
| Others (each)total 0.15 max | ≤ 0.05 | — |
| Al | balance | — |
2030-T851 — frequently asked
What is 2030-T851 used for?
2030-T851 is typically used for screw machine parts, bolts and fittings. In short: free-cutting; medium strength.
What is the yield strength of 2030-T851?
2030-T851 has a typical yield strength of 370 MPa (53.7 ksi) and a tensile strength of 425 MPa (61.6 ksi) — stronger than 85% of aluminum grades. Strength varies by condition: see the 8 listed tempers.
Is 2030-T851 easy to machine?
Yes — machinability is rated excellent (90/100, better than 98% of aluminum grades). Outstanding for high-speed automatic turning — free-breaking chips, mirror-like bores; use sharp positive-rake carbide, high speed, light lubricity coolant, and collect Pb-bearing chips separately.
Can 2030-T851 be welded?
Not readily — weldability is rated not recommended (12/100). Not recommended for fusion welding (hot cracking from Pb/Bi and high Cu); join by threading, press fitting, riveting or adhesives, or use friction/resistance methods with qualification.
What surface finishes work on 2030-T851?
Requires protection: chromate/Ti-Zr conversion coat plus paint or hard anodize; decorative or clear anodizing is streaky, and electroplating needs a specialised pre-treatment for the Pb phase.
Can 2030-T851 be formed, bent or molded?
Formability is limited in T3/T4/T8; do bending and heading in O or freshly solution-treated condition and keep radii generous.
What is the maximum service temperature of 2030-T851?
2030-T851 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.
Can FabDigit make parts in 2030-T851?
Yes — 2030-T851 is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- EN 573-3 Aluminium and aluminium alloys — chemical composition — CEN (2019)
- EN 755-2 Extruded rod/bar, tube and profiles — mechanical properties — CEN (2016)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion of Aluminum Alloys — ASM International (2005)
- Free-machining aluminium bar (AlCu4PbMg) datasheets — European extruders (AMAG / Nedal / Constellium) (2023)
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.