EN 10028-3 P355NH Introduce
EN 10028-3 P355NH steel is a type of steel used for pressure vessels and boiler parts in a variety of industries. It has a unique chemical composition that includes chromium, carbon, sulphur, phosphorus, silicon, and other metals. It has excellent mechanical properties, with excellent tensile strength, yield strength, and creep resistance even when exposed to high temperatures. It also has excellent corrosion resistance due to its chromium content and low carbon content. EN 10028-3 P355NH steel is also highly weldable, heat-treatable, and quenched and tempered for enhanced strength and toughness. All of these qualities make EN 10028-3 P355NH steel a popular choice for use in pressure vessels and other components.
Smelting temperature:1866°C - 1367°C
Application:Pressure flat steel products - Part 3: Weldable fine grain steel, normalized
EN 10028-3 P355NH Material Chemical Composition
The chemical composition of the EN 10028-3 P355NH steel are as follows:
| Element | Min | Max |
|---|---|---|
| Nitrogen (N) | - | 0.0200 |
| Copper (Cu) | - | 0.3000 |
| Titanium (Ti) | - | 0.0300 |
| Aluminum (Al) | 0.0200 | - |
| Niobium (Nb) | - | 0.0500 |
| Vanadium (V) | - | 0.1000 |
| Molybdenum (Mo) | - | 0.0800 |
| Nickel (Ni) | - | 0.5000 |
| Chromium (Cr) | - | 0.3000 |
| PhOsphorus (P) | - | 0.0300 |
| Sulfur (S) | - | 0.0250 |
| Manganese (Mn) | 0.9000 | 1.7000 |
| Silicon (Si) | - | 0.5000 |
| Carbon (C) | - | 0.2000 |
| Titanium (Ti) | - | 0.0400 |
| Sulfur (S) | - | 0.0200 |
| PhOsphorus (P) | - | 0.0250 |
| (Nb+Ti+V) | - | 0.1200 |
| (Cr+Cu+Mo) | - | 0.4500 |
| (Cr+Cu+Mo) | - | 0.4500 |
| Aluminum (Al) | 0.0200 | - |
| Copper (Cu) | - | 0.3000 |
| Sulfur (S) | - | 0.0150 |
| Molybdenum (Mo) | - | 0.0800 |
| Copper (Cu) | - | 0.3000 |
| Chromium (Cr) | - | 0.3000 |
| Aluminum (Al) | 0.0200 | - |
| (V+Nb) | - | 0.1200 |
| Silicon (Si) | 0.1000 | 0.5000 |
| Nickel (Ni) | - | 0.3000 |
| Manganese (Mn) | 0.9000 | 1.6500 |
| Copper (Cu) | - | 0.2000 |
| (CEV) | - | 0.4700 |
| Aluminum (Al) | 0.0200 | 0.0600 |
| Nitrogen (N) | - | 0.0120 |
| Manganese (Mn) | 1.1000 | 1.7000 |
| (CEV) | - | 0.4300 |
| Carbon (C) | - | 0.1800 |
| Aluminum (Al) | 0.0200 | - |
EN 10028-3 P355NH Material Mechanical Properties
EN 10028-3 P355NH steel is also known for having excellent corrosion resistance. This is due to a few factors. Firstly, its chromium content helps to resist corrosion by forming a thin oxide film on its surface. Secondly, its relatively low carbon content also prevents the steel from rusting easily. Steel with a higher carbon content is more prone to corrosion.
The mechanical properties of the EN 10028-3 P355NH steel are as follows:
| YieldRp0.2 | ≤ 477 (MPa) |
| TeileRm | ≤ 785 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 24% |
| Reduction in cross section on fractureZ | 11% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 431 |
EN 10028-3 P355NH Material Thermal Properties
The thermal performance parameters of the EN 10028-3 P355NH steel are as follows:
| Temperature (°C) | 32 | 987 | 267 |
| Modulus of elasticity (GPa) | - | 929 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 13 |
| Thermal conductivity (W/m·°C) | - | 21.3 | 24.2 |
| Specific thermal capacity (J/kg·°C) | - | 114 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.11 | - | - |
| Deity (kg/dm³) | - | - | 141 |
| Poisson’s coefficient, ν | - | - | 234 |
EN 10028-3 P355NH Material Machining Technology
EN 10028-3 P355NH steel covering topics such as the best machining techniques, the ideal machining conditions, and the cutting tools used for the job. It is important to ensure the appropriate conditions are met in order to machine this steel effectively. Examples of these conditions include the selection of the appropriate cutting tool, setting the speed and feeds, and the selection of a coolant system.