EN 10028-6 P690QL2 Introduce
EN 10028-6 steel standard is a European standard which recognizes hot-rolled flat steel products for pressure vessel applications. Steel products in this family include a variety of plate products that are designated as either normalised rolled, thermomechanically rolled, thermomechanical control processed (TMCP) or fine grain steels. The purpose of EN 10028-6 and other European standards is to ensure a consistent product quality, while also providing adequate information that product purchasers may use to make informed decisions.
Smelting temperature:1294°C - 1392°C
Application:Pressure flat steel products - Part 6: Weldable fine grain steel, quenched and tempered
EN 10028-6 P690QL2 Material Chemical Composition
The chemical composition of the EN 10028-6 P690QL2 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Zirconium (Zr) | - | 0.1500 |
| Vanadium (V) | - | 0.1200 |
| Titanium (Ti) | - | 0.0500 |
| Silicon (Si) | - | 0.8000 |
| Sulfur (S) | - | 0.0100 |
| PhOsphorus (P) | - | 0.0200 |
| Nickel (Ni) | - | 2.5000 |
| Niobium (Nb) | - | 0.0600 |
| Nitrogen (N) | - | 0.0150 |
| Molybdenum (Mo) | - | 0.7000 |
| Manganese (Mn) | - | 1.7000 |
| Copper (Cu) | - | 0.3000 |
| Chromium (Cr) | - | 1.5000 |
| Carbon (C) | - | 0.2000 |
| Boron (B) | - | 0.0050 |
EN 10028-6 P690QL2 Material Mechanical Properties
The mechanical properties of EN 10028-6 P690QL2 flat products made of steel are specified by the standard. These include minimum yield and tensile strength, as well as elongation, flexural properties as well as impact properties. The mechanical properties of a steel also depend on the content and the microstructure of the material.
The mechanical properties of the EN 10028-6 P690QL2 steel are as follows:
| YieldRp0.2 | ≤ 427 (MPa) |
| TeileRm | ≤ 646 (MPa) |
| ImpactKV/Ku | 11(J) |
| ElongationA | 12% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 344 |
EN 10028-6 P690QL2 Material Thermal Properties
The thermal performance parameters of the EN 10028-6 P690QL2 steel are as follows:
| Temperature (°C) | 34 | 684 | 313 |
| Modulus of elasticity (GPa) | - | 342 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 11 |
| Thermal conductivity (W/m·°C) | - | 23.3 | 41.2 |
| Specific thermal capacity (J/kg·°C) | - | 132 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.44 | - | - |
| Deity (kg/dm³) | - | - | 221 |
| Poisson’s coefficient, ν | - | - | 132 |
EN 10028-6 P690QL2 Material Machining Technology
EN 10028-6 P690QL2 steel is highly weldable, making it easy to join components together using welding. The material can be joined using shielded metal arc welding, gas metal arc welding, and gas tungsten arc welding. It is also possible to weld dissimilar metals, such as stainless steel and carbon steel, to EN 10028-6 P690QL2 steel without issue.