DIN EN 10028-5 P420ML1 Introduce
The DIN EN 10028-5 Standard is one of the most popular European standards for steel and alloy grades used in engineering and the construction industry. The standard is applicable for weldable fine grain steels and is used most commonly in welded pressure vessels. This standard covers requirements related to heat treatment, workmanship, mechanical characteristics, and inspections, as well as other aspects related to steel grade selection and application.
Smelting temperature:1663°C - 1825°C
Application:Pressure flat steel products - Part 5: Weldable fine grain steel, thermomechanical rolling
DIN EN 10028-5 P420ML1 Material Chemical Composition
The chemical composition of the DIN EN 10028-5 P420ML1 steel are as follows:
| Element | Min | Max |
|---|---|---|
| (CEV) | - | 0.4600 |
| (CEV) | - | 0.4500 |
| (CEV) | - | 0.4300 |
| (Cr+Cu+Mo) | - | 0.6000 |
| Vanadium (V) | - | 0.1000 |
| Titanium (Ti) | - | 0.0500 |
| Nickel (Ni) | - | 0.5000 |
| Niobium (Nb) | - | 0.0500 |
| Molybdenum (Mo) | - | 0.2000 |
| Nitrogen (N) | - | 0.0200 |
| Aluminum (Al) | 0.0200 | - |
| Sulfur (S) | - | 0.0080 |
| PhOsphorus (P) | - | 0.0200 |
| Manganese (Mn) | - | 1.7000 |
| Silicon (Si) | - | 0.5000 |
| Carbon (C) | - | 0.1600 |
| Sulfur (S) | - | 0.0150 |
DIN EN 10028-5 P420ML1 Material Mechanical Properties
The mechanical properties of the DIN EN 10028-5 P420ML1 steel are as follows:
| YieldRp0.2 | ≤ 323 (MPa) |
| TeileRm | ≤ 411 (MPa) |
| ImpactKV/Ku | 21(J) |
| ElongationA | 34% |
| Reduction in cross section on fractureZ | 34% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 244 |
DIN EN 10028-5 P420ML1 Material Thermal Properties
The thermal performance parameters of the DIN EN 10028-5 P420ML1 steel are as follows:
| Temperature (°C) | 33 | 359 | 929 |
| Modulus of elasticity (GPa) | - | 876 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 44 |
| Thermal conductivity (W/m·°C) | - | 42.3 | 34.2 |
| Specific thermal capacity (J/kg·°C) | - | 144 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.44 | - | - |
| Deity (kg/dm³) | - | - | 433 |
| Poisson’s coefficient, ν | - | - | 434 |
DIN EN 10028-5 P420ML1 Material Machining Technology
DIN EN 10028-5 P420ML1 steel is a popular steel grade used in many applications. It is renowned for its strength and heat-treatability, but machining it poses some unique challenges. When machining this type of steel, it is important to take into consideration the cutting speed, coolant choice, cutting tool geometry, and machining strategies selected. Taking the time to choose the right tools, coolants, and machining strategies is necessary to ensure the best results in terms of tool life, surface finish, and overall production.