Aluminum 2N01-T4
Temper
GB 2N01 · JIS A2N01
T4 = solution heat treated and naturally aged
Choose when some cold forming or straightening is still needed after heat treatment and maximum strength is not required.
Values for the T4 condition
Other 2N01 tempers and conditions
2N01 is listed in 5 conditions; see the grade overview at 2N01.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Softest state for deep machining stock removal, cold sizing or re-forging before solution treatment. | 95 | 185 | 20 | 55 HB | 50 % IACS |
T4This page Solution heat treated and naturally aged | Choose when some cold forming or straightening is still needed after heat treatment and maximum strength is not required. | 205 | 350 | 16 | 95 HB | 33 % IACS |
Solution heat treated and overaged for stress-corrosion resistance | Rarely stocked overaged condition used when long-term thermal stability and better SCC/exfoliation resistance outweigh peak strength. | 260 | 355 | 13 | 105 HB | 44 % IACS |
T6Default Solution heat treated and artificially aged | Standard delivered condition for 2N01 forgings and bar: peak strength plus retained strength at 150–200 °C. | 280 | 400 | 12 | 115 HB | 40 % IACS |
T6, stress relieved by compression | Hand/die forgings that must be heavily machined — residual stress is knocked down so parts stay dimensionally stable. | 290 | 405 | 11 | 118 HB | 40 % IACS |
What is 2N01-T4?
2N01-T4 is 2N01 in the T4 temper — choose when some cold forming or straightening is still needed after heat treatment and maximum strength is not required. 2N01-T4 has a yield strength of 205 MPa (29.7 ksi) and a tensile strength of 350 MPa (50.8 ksi) — stronger than 54% of aluminum grades. Elongation at break is 16% and the elastic modulus is 74 GPa (10.7 Msi). 2N01-T4 has a density of 2.82 g/cm³ (0.102 lb/in³), heavier than 89% of aluminum grades. It melts at 505°C (941 °F). T6 is the default condition FabDigit quotes; T4 is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 16%, better than 84% of aluminum grades
Limitations
- Needs corrosion protection — 30/100, worse than 98% of aluminum grades
- Difficult to weld — 20/100, worse than 89% of aluminum grades
- Limited service temperature — 120°C (248 °F), worse than 79% of aluminum grades
2N01-T4 properties
Typical room-temperature values for 2N01-T4; 12 are specific to this condition. Other listed values are 2N01 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
2N01-T4 has a density of 2.82 g/cm³ (0.102 lb/in³), heavier than 89% of aluminum grades. It melts at 505°C (941 °F).
Mechanical15
2N01-T4 has a yield strength of 205 MPa (29.7 ksi) and a tensile strength of 350 MPa (50.8 ksi) — stronger than 54% of aluminum grades. Elongation at break is 16% and the elastic modulus is 74 GPa (10.7 Msi).
Thermal6
2N01-T4 is rated for continuous service to 120°C (248 °F). It conducts heat at 130 W/m·K (75.1 BTU/hr·ft·°F), worse than 65% of aluminum grades. Thermal expansion is 22.3 µm/m·K (12.4 µin/in·°F).
Electrical3
2N01-T4 conducts electricity at 33 % IACS, worse than 57% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is poor (30/100), worse than 98% of aluminum grades.
Sustainability4
Producing a kilogram of 2N01-T4 takes about 205 MJ of energy and emits 12.5 kg of CO₂ — more than 76% of aluminum grades. Typical recycled content is 12%.
Manufacturability8
2N01-T4's machinability is good (65/100, better than 62% of aluminum grades); weldability poor (20/100); formability fair (50/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 2N01-T4
Is 2N01 easy to machine?
Machines well in T6 with sharp carbide tools, high speed and flood coolant; Ni/Fe intermetallics are abrasive so expect faster edge wear than 6061.
Can 2N01 be welded?
Not recommended for fusion welding (hot cracking, loss of T6 properties) — use riveting, bolting, friction stir or friction welding, and re-heat-treat where possible.
Can 2N01 be formed, bent or molded?
Excellent hot forging/upsetting at roughly 400–450 °C; cold forming only in O or T4 with generous bend radii, then solution treat and age.
What surface finishes work on 2N01?
Chromic or sulfuric anodize gives a dull grey film; for corrosion service use cladding, conversion coating plus primer, or hard anodize for wear surfaces.
2N01 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 | 0.5 – 1.2 | 0.8 |
| Feimpurity/intentional Fe-Ni phase former | ≤ 1 | 0.6 |
| Cumain strengthening element | 3.5 – 4.5 | 4 |
| Mn | ≤ 0.2 | 0.1 |
| Mg | 0.4 – 0.8 | 0.6 |
| Nigives elevated-temperature stability | 1.7 – 2.3 | 2 |
| Cr | ≤ 0.1 | — |
| Zn | ≤ 0.25 | — |
| Tigrain refiner | ≤ 0.2 | — |
| Others (each) | ≤ 0.05 | — |
| Others (total) | ≤ 0.15 | — |
| Al | balance | — |
2N01-T4 — frequently asked
What is 2N01-T4 used for?
2N01-T4 is typically used for aircraft structural forgings, airframe fittings and brackets, elevated-temperature forged components to 200 °C, machined structural parts from forged bar, engine-adjacent forged hardware and JIS-specified aerospace replacement parts. In short: JIS aerospace forging alloy; 200 °C service capability; 2017/2024 strength class.
What is the yield strength of 2N01-T4?
2N01-T4 has a typical yield strength of 205 MPa (29.7 ksi) and a tensile strength of 350 MPa (50.8 ksi) — stronger than 54% of aluminum grades. Strength varies by condition: see the 5 listed tempers.
Is 2N01-T4 easy to machine?
Reasonably — machinability is rated good (65/100, better than 62% of aluminum grades). Machines well in T6 with sharp carbide tools, high speed and flood coolant; Ni/Fe intermetallics are abrasive so expect faster edge wear than 6061.
Can 2N01-T4 be welded?
Not readily — weldability is rated poor (20/100). Not recommended for fusion welding (hot cracking, loss of T6 properties) — use riveting, bolting, friction stir or friction welding, and re-heat-treat where possible.
What surface finishes work on 2N01-T4?
Chromic or sulfuric anodize gives a dull grey film; for corrosion service use cladding, conversion coating plus primer, or hard anodize for wear surfaces.
Can 2N01-T4 be formed, bent or molded?
Excellent hot forging/upsetting at roughly 400–450 °C; cold forming only in O or T4 with generous bend radii, then solution treat and age.
What is the maximum service temperature of 2N01-T4?
2N01-T4 is rated for continuous use to about 120°C (248 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 2N01-T6 and 2N01-O?
T6 is the default condition — standard delivered condition for 2N01 forgings and bar: peak strength plus retained strength at 150–200 °C. O: softest state for deep machining stock removal, cold sizing or re-forging before solution treatment. Yield strength is 280 MPa in T6 versus 95 MPa in O.
Sources
- JIS H 4140 Aluminium and aluminium alloy forgings — JSA (2020)
- JIS H 4040 Aluminium and aluminium alloy rods, bars and wires — JSA (2015)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
- Aluminum Association Teal Sheets — International Alloy Designations — The Aluminum Association (2018)
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.