2219 Aluminum T81
metal· T851
2219 aluminum alloy in T81 temper is a copper-alloyed aluminum system solution heat-treated, artificially aged, and stress-relieved by stretching, providing high strength (yield ~40 ksi, ultimate ~57 ksi) with improved stress-corrosion cracking resistance compared to non-stress-relieved tempers. Primary applications include cryogenic tankage and aerospace structures requiring combined tensile strength and fracture toughness at temperatures down to liquid hydrogen (-423°F).
aerospacestructural
Compliance & Regulations
?Conflict Free?FDA?RoHS?REACH?TSCA?Prop 65
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| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Compressive Modulus(Ec) | — | ksi | 22°C · Extruded shapes | — | |
Compressive Tangent Modulus vs Stress(Etn(σ))2 entries | Curve (12 pts) | ksi | 21°C · L | — | |
| ↳ | Curve (13 pts) | ksi | 21°C · LT | — | |
Poisson's Ratio(ν) | — | - | 22°C | — | |
Shear Modulus(G) | — | ksi | 22°C · Extruded shapes | — | |
Stress–Strain Curve(σ–ε)2 entries | Curve (17 pts) | ksi | 21°C · L | — | |
| ↳ | Curve (16 pts) | ksi | 21°C · LT | — | |
Stress–Strain Curve (buckling region, ≤ 2% strain)(σ–ε (low-strain))4 entries | Curve (8 pts) | ksi | 21°C · L | — | |
| ↳ | Curve (9 pts) | ksi | 21°C · L | — | |
| ↳ | Curve (9 pts) | ksi | 21°C · LT | — | |
| ↳ | Curve (9 pts) | ksi | 21°C · LT | — | |
Ultimate Tensile Strength(σUTS) | — | ksi | 5 entriesClick to expand | ||
Yield Strength (0.2% offset)(σy) | — | ksi | 5 entriesClick to expand | ||
Young's Modulus(E) | — | ksi | 22°C · Extruded shapes | — | |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
Rows with are inherited from the base material
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
CTE vs Temperature(α(T)) | Curve (13 pts) | µin/in·°F | — | — | |
Specific Heat vs Temperature(Cp(T)) | Curve (15 pts) | BTU/(lb·°F) | — | — | |
Thermal Conductivity vs Temperature(k(T)) | Curve (11 pts) | BTU/(hr·ft·°F) | — | — |
Rows with are inherited from the base material
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | — | lb/in³ | 22°C | — |
Rows with are inherited from the base material
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
Safety & Biocompatibility
Quality & Standards
RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.