DIN 3.4144 Alloy – Grade 3.4144 T74: High Strength, Toughness, and Corrosion Resistance for Aerospace
DIN 3.4144 is a heat treatable alloy that has very high mechanical properties and high fracture toughness. Popular with the aerospace industry, DIN 3.4144 offers good stress and corrosion cracking resistance and high strength at subzero temperatures.
Properties
General
| Property | Value | Comment |
|---|---|---|
Density | 2.7 - 2.85 g/cm³ | Typical for Wrought 7000 Series Aluminium |
Mechanical
| Property | Temperature | Value | Condition | Related Standards | Shape | Comment |
|---|---|---|---|---|---|---|
Elastic modulus | 69.0 - 72.0 GPa | Typical for Wrought 7000 Series Aluminium | ||||
Elongation | 20.0 °C | 2.0 % | T74 | WL 3.4144-1 | Forging | Transverse |
20.0 °C | 3.0 % | T74 | WL 3.4144-1 | Forging | Transverse | |
20.0 °C | 4.0 % | T74 | WL 3.4144-1 | Forging | Transverse | |
20.0 °C | 5.0 % | T74 | WL 3.4144-1 | Forging | Transverse | |
20.0 °C | 7.0 % | T74 | WL 3.4144-1 | Forging | ||
Hardness, Brinell | 20.0 °C | 135.0 [-] | T74 | WL 3.4144-1 | Forging | Transverse |
20.0 °C | 135.0 [-] | T74 | WL 3.4144-1 | Forging | ||
Plane-Strain Fracture Toughnes | 20.0 °C | 25.6 - 37.9 MPa·√m | T74 | WL 3.4144-1 | Forging | |
20.0 °C | 25.6 MPa·√m | T74 | WL 3.4144-1 | Forging | ||
20.0 °C | 25.6 - 26.2 MPa·√m | T74 | WL 3.4144-1 | Forging | ||
20.0 °C | 26.2 - 37.9 MPa·√m | T74 | WL 3.4144-1 | Forging | ||
20.0 °C | 26.2 MPa·√m | T74 | WL 3.4144-1 | Forging | ||
20.0 °C | 37.9 MPa·√m | T74 | WL 3.4144-1 | Forging | ||
Poisson's ratio | 0.33 [-] | Typical for Wrought 7000 Series Aluminium | ||||
Shear modulus | 26.4 - 27.1 GPa | Typical for Wrought 7000 Series Aluminium | ||||
Tensile strength | 20.0 °C | 445.0 MPa | T74 | WL 3.4144-1 | Forging | Transverse |
20.0 °C | 455.0 MPa | T74 | WL 3.4144-1 | Forging | Transverse | |
20.0 °C | 460.0 MPa | T74 | WL 3.4144-1 | Forging | Transverse | |
20.0 °C | 470.0 MPa | T74 | WL 3.4144-1 | Forging | Transverse | |
20.0 °C | 475.0 MPa | T74 | WL 3.4144-1 | Forging | Transverse | |
20.0 °C | 480.0 MPa | T74 | WL 3.4144-1 | Forging | ||
20.0 °C | 490.0 MPa | T74 | WL 3.4144-1 | Forging | ||
20.0 °C | 495.0 MPa | T74 | WL 3.4144-1 | Forging |
Thermal
| Property | Temperature | Value | Condition | Related Standards | Shape | Comment |
|---|---|---|---|---|---|---|
Coefficient of thermal expansion | 100.0 °C | 2.3e-05 1/K | T74 | WL 3.4144-1 | Forging | |
200.0 °C | 2.43e-05 1/K | T74 | WL 3.4144-1 | Forging | ||
300.0 °C | 2.52e-05 1/K | T74 | WL 3.4144-1 | Forging | ||
Melting point | 465.0 - 655.0 °C | Typical for Wrought 7000 Series Aluminium | ||||
Specific heat capacity | 100.0 °C | 963.0 J/(kg·K) | T74 | WL 3.4144-1 | Forging | |
Thermal conductivity | 25.0 °C | 157.0 W/(m·K) | T74 | WL 3.4144-1 | Forging |
Electrical
| Property | Value | Comment |
|---|---|---|
Electrical conductivity | 18000000.0 - 34000000.0 S/m | Typical for Wrought 7000 Series Aluminium |
Electrical resistivity | 2.9e-08 - 5.6e-08 Ω·m | Typical for Wrought 7000 Series Aluminium |
Chemical properties
| Property | Value | Condition | Related Standards | Shape |
|---|---|---|---|---|
Chromium | 0.04 | T74 | WL 3.4144-1 | Forging |
Copper | 2.0 - 2.6 % | T74 | WL 3.4144-1 | Forging |
Iron | 0.15 | T74 | WL 3.4144-1 | Forging |
Magnesium | 1.9 - 2.6 % | T74 | WL 3.4144-1 | Forging |
Manganese | 0.1 | T74 | WL 3.4144-1 | Forging |
Silicon | 0.12 | T74 | WL 3.4144-1 | Forging |
Titanium | 0.06 | T74 | WL 3.4144-1 | Forging |
Zinc | 5.7 - 6.7 % | T74 | WL 3.4144-1 | Forging |
Zirconium | 0.08 - 0.15 % | T74 | WL 3.4144-1 | Forging |
Technological properties
| Property | ||
|---|---|---|
| Brazing | Excellent | |
Metal
- ASTM B316 Grade 7050-O: High-Performance Heat‑Treatable Aluminum Alloy for Aerospace
- WL 3.4144-1 Grade 3.4144 H13: Premium Heat‑Treatable Aluminum Alloy for Aerospace
- 3.4144-1 (T73) Grade: High-Performance Heat-Treatable Aluminium Alloy
- ASTM B316 Grade 7050 T7 – Heat‑Treatable Aluminum Alloy Offering Superior Strength and Corrosion Resistance
- AA Standards Grade 7175 T74 – Detailed Material Properties & Specifications
- WL 3.4394 T74 Steel: High Strength, Superior Toughness & Corrosion Resistance for Large-Scale Applications
- DIN 3.4144 T7451: High-Performance, Heat-Treatable Alloy for Aerospace Applications
- DIN 3.4144 T7452: High-Strength, Corrosion-Resistant Aerospace Alloy
- WL 3.4334-1: German Aviation Grade 3.4334 (T74) – Premium Forged Aluminum Alloy
- AW-7010 T74 Aluminium Alloy – EN 573-3 Grade, High-Strength, Age-Hardenable