EN 10028-6 P690QH Introduce
The EN 10028-6 steel standard is a European harmonised standard that provides requirements for hot-rolled flat steel products for pressure vessels. This standard sets chemical and mechanical property requirements, production control requirements, notch toughness, testing requirements and acceptance criteria. The purpose of the standard is to maintain a consistent product quality which makes it easier for organisations to buy, sell and manufacture steels.
Smelting temperature:1211°C - 1125°C
Application:Pressure flat steel products - Part 6: Weldable fine grain steel, quenched and tempered
EN 10028-6 P690QH Material Chemical Composition
The chemical composition of the EN 10028-6 P690QH steel are as follows:
| Element | Min | Max |
|---|---|---|
| Nitrogen (N) | - | 0.0150 |
| Copper (Cu) | - | 0.3000 |
| Boron (B) | - | 0.0050 |
| Titanium (Ti) | - | 0.0500 |
| Niobium (Nb) | - | 0.0600 |
| Vanadium (V) | - | 0.1200 |
| Molybdenum (Mo) | - | 0.7000 |
| Nickel (Ni) | - | 2.5000 |
| Chromium (Cr) | - | 1.5000 |
| PhOsphorus (P) | - | 0.0250 |
| Sulfur (S) | - | 0.0150 |
| Manganese (Mn) | - | 1.7000 |
| Silicon (Si) | - | 0.8000 |
| Carbon (C) | - | 0.2000 |
| Zirconium (Zr) | - | 0.1500 |
| Niobium (Nb) | - | 0.0600 |
| Copper (Cu) | - | 0.3000 |
EN 10028-6 P690QH Material Mechanical Properties
EN 10028-6 is a standard specification for steel plates used in pressure vessel applications. It is a product of the European Standardization Institute (EN). Its mechanical properties include yield strength, tensile strength, hardness, ductility, and weldability, all of which can help to ensure that the steel meets the requirements of the application in terms of strength, durability, and serviceability.
The mechanical properties of the EN 10028-6 P690QH steel are as follows:
| YieldRp0.2 | ≤ 997 (MPa) |
| TeileRm | ≤ 377 (MPa) |
| ImpactKV/Ku | 41(J) |
| ElongationA | 42% |
| Reduction in cross section on fractureZ | 12% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 133 |
EN 10028-6 P690QH Material Thermal Properties
The thermal performance parameters of the EN 10028-6 P690QH steel are as follows:
| Temperature (°C) | 41 | 585 | 727 |
| Modulus of elasticity (GPa) | - | 753 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 21 |
| Thermal conductivity (W/m·°C) | - | 14.3 | 43.2 |
| Specific thermal capacity (J/kg·°C) | - | 122 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.14 | - | - |
| Deity (kg/dm³) | - | - | 422 |
| Poisson’s coefficient, ν | - | - | 234 |
EN 10028-6 P690QH Material Machining Technology
When machining EN 10028-6 P690QH steel, there are several factors that need to be taken into consideration in order to achieve the desired results. First, the type and size of the cutting tools must be correctly selected for the job. The cutting speed and feed rate also need to be adjusted to suit the chosen material and machining process for the best results. Additionally, cooling should be applied periodically as excessive heat buildup can cause the tools to wear prematurely and cause tool breakage. Finally, periodic chip breaking is necessary in order to minimize chip build-up and clogging of the cutting tool.