EN 10208-2 Grade L450QB quenched and tempered (+QT)
EN 10208-2 Grade L450QB quenched and tempered (+QT) introduction
Steel L455QB is produced as seamless pipe for flammable media in condition annealed. Its yield stress is between 450 and 570 N/mm². The steel is weldable, its carbon equivalent CEV accounts for max. 0.45. To the welding seam (welding methods SAW, COW) applies a mandrel-diameter for the bending test of 6x nominal thickness of the pipe.
Pipes are available with interior and exterior coating.
Main fields of application are long-distance pipelines for flammable liquids (e.g. crude oil and natural gas products) as well as for compressed and liquefied flammable gases. Pipes acc. to DIN EN 10208-2 : 1996-08 also fulfil the conditions decisive for the consumption acc. to standards 5L, 5LX and 5LS of the American Petroleum Institute (API). When using these pipes has to be considered the Technical rule for flammable liquids (Technische Regel für brennbare FlüssigkeitenTRbF 301).
Equivalent material: ISO X65QE, ISO L450QE, DIN 1.8952, EN 1.8952
EN 10208-2 Grade L450QB quenched and tempered (+QT) general
| Property |
Temperature |
Value |
Comment |
| Density |
23.0 °C |
Density of 7.8 g/cm³ |
Typical for Steel |
EN 10208-2 Grade L450QB quenched and tempered (+QT) chemical
| Property |
Value |
| Aluminium |
Aluminium of 0.015 - 0.06 % |
| Carbon |
Carbon of 0.16 % |
| Chromium |
Chromium of 0.3 % |
| Copper |
Copper of 0.25 % |
| Manganese |
Manganese of 1.6 % |
| Molybdenum |
Molybdenum of 0.1 % |
| Nickel |
Nickel of 0.3 % |
| Niobium |
Niobium of 0.05 % |
| Nitrogen |
Nitrogen of 0.01 % |
| Phosphorus |
Phosphorus of 0.03 % |
| Silicon |
Silicon of 0.45 % |
| Sulfur |
Sulfur of 0.02 % |
| Titanium |
Titanium of 0.06 % |
| Vanadium |
Vanadium of 0.09 % |
EN 10208-2 Grade L450QB quenched and tempered (+QT) mechanical
| Property |
Temperature |
Value |
Comment |
| Elastic modulus |
23.0 °C |
Elastic modulus of 190 - 210 GPa |
Typical for Steel |
| Elongation |
20.0 °C |
Elongation of 20 % |
- |
| Elongation, transverse |
20.0 °C |
Elongation, transverse of 18 % |
- |
| Poisson's ratio |
23.0 °C |
Poisson's ratio of 0.3 [-] |
Typical for Steel |
| Tensile strength |
20.0 °C |
Tensile strength of 535 MPa |
- |
| Yield strength |
20.0 °C |
Yield strength of 450 - 570 MPa |
- |
| Yield strength Rp0.5 |
20.0 °C |
Yield strength Rp0.5 of 450 - 570 MPa |
- |
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