DIN 1725-1 Grade 3.3206 H18: High-Performance Ribbed Aluminium Tubes for Steam Boilers
Valid for tube with ribbs - outer diameter of ribbed parts of tubes: 36,0 to 70,0 mm - wall thicknes of ribbed parts of tubes: 1,0 to 8,5 mm - spacing of ribbs: 2,2 to 5,1 mm - high of ribbs: 6,5 to 16 mm - average thickness of ribbs: 0,4 to 1,0 mm Melting: - inductive - gaseous heated melting oven Application: - steam boiler with pressure ab to 10 bar Further processing: - no heat treatment
Properties
General
| Property | Value | Comment |
|---|---|---|
Density | 2.7 g/cm³ | Typical for Wrought 6000 Series Aluminium |
Mechanical
| Property | Temperature | Value | Condition | Related Standards | Shape | Comment |
|---|---|---|---|---|---|---|
Elastic modulus | 70.0 GPa | Typical for Wrought 6000 Series Aluminium | ||||
Plane-Strain Fracture Toughnes | 22.0 - 35.0 MPa·√m | Typical for Wrought 6000 Series Aluminium | ||||
Poisson's ratio | 0.33 [-] | Typical for Wrought 6000 Series Aluminium | ||||
Shear modulus | 26.0 - 26.5 GPa | Typical for Wrought 6000 Series Aluminium | ||||
Tensile strength | 20.0 °C | 180.0 MPa | H18 | DIN 1725-1, VdTÜV WB 420-4, VdTÜV WB 492 | Tube |
Thermal
| Property | Value | Comment |
|---|---|---|
Coefficient of thermal expansion | 1.6e-05 - 2.4e-05 1/K | Typical for Wrought 6000 Series Aluminium |
Melting point | 555.0 - 655.0 °C | Typical for Wrought 6000 Series Aluminium |
Specific heat capacity | 887.0 - 963.0 J/(kg·K) | Typical for Wrought 6000 Series Aluminium |
Thermal conductivity | 170.0 - 220.0 W/(m·K) | Typical for Wrought 6000 Series Aluminium |
Electrical
| Property | Value | Comment |
|---|---|---|
Electrical conductivity | 21000000.0 - 34000000.0 S/m | Typical for Wrought 6000 Series Aluminium |
Electrical resistivity | 2.9e-08 - 5e-08 Ω·m | Typical for Wrought 6000 Series Aluminium |
Chemical properties
| Property | Value | Condition | Related Standards | Shape |
|---|---|---|---|---|
Chromium | 0.05 | H18 | DIN 1725-1, VdTÜV WB 420-4, VdTÜV WB 492 | Tube |
Copper | 0.1 | H18 | DIN 1725-1, VdTÜV WB 420-4, VdTÜV WB 492 | Tube |
Iron | 0.1 - 0.3 % | H18 | DIN 1725-1, VdTÜV WB 420-4, VdTÜV WB 492 | Tube |
Magnesium | 0.35 - 0.6 % | H18 | DIN 1725-1, VdTÜV WB 420-4, VdTÜV WB 492 | Tube |
Manganese | 0.1 | H18 | DIN 1725-1, VdTÜV WB 420-4, VdTÜV WB 492 | Tube |
Silicon | 0.3 - 0.6 % | H18 | DIN 1725-1, VdTÜV WB 420-4, VdTÜV WB 492 | Tube |
Titanium | 0.1 | H18 | DIN 1725-1, VdTÜV WB 420-4, VdTÜV WB 492 | Tube |
Zinc | 0.15 | H18 | DIN 1725-1, VdTÜV WB 420-4, VdTÜV WB 492 | Tube |
Technological properties
| Property | ||
|---|---|---|
| Workability | Excellent workability. | |
Metal
- DIN 1725-1 Grade 3.0915 H18 – High‑Strength AlFeSi Alloy for Precision Forming
- DIN 1725-1 Alloy 3.3326 H18 – Superior Seawater Corrosion Resistance & Strength
- DIN 1725-1 Grade 3.0505 H18 – High‑Strength Aluminum Alloy for Advanced Applications
- DIN 1725-1 Grade 3.3206 T3 Alloy – 200–250 MPa Strength, Weldability & Automotive Profile Applications
- DIN 1725‑1 Grade 3.3206 T8 – High‑Strength, Corrosion‑Resistant Alloy for Automotive Extrusion
- DIN 1725-1 Grade 3.3547 H18 – Premium Cold-Worked AlMg4.5Mn Alloy with Superior Corrosion Resistance
- DIN 1725-1 Grade 3.3316 H18 – High-Strength, Corrosion-Resistant Aluminum-Magnesium Alloy
- DIN 1725‑1 Grade 3.3206 T5 – High‑Strength, Corrosion‑Resistant Aluminium Alloy
- DIN 1725-1 Grade 3.3206 T4 – High-Strength, Corrosion-Resistant Steel for Automotive Applications
- DIN 1725-1 Grade 3.0515 H18 Tubes – Ribbed Specifications for Steam Boiler Applications