EN 10083-3 20MnB5 Introduce
The European standard EN 10083-3, Steel – Part 3: Technical Delivery Conditions for Alloy Steels, was adopted in 2018 to set out a range of requirements for the use of alloy steels for engineering purposes in Europe. With the increasing global demand for steel, particularly for specialty steels found in the automotive industry, EN 10083-3 was created to ensure consistent quality standards across different manufacturers.
Smelting temperature:1187°C - 1786°C
Application:Steels for quenching and tempering - part 3: technical delivery conditions for alloy steels
EN 10083-3 20MnB5 Material Chemical Composition
The chemical composition of the EN 10083-3 20MnB5 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.4000 |
| Sulfur (S) | - | 0.0350 |
| PhOsphorus (P) | - | 0.0250 |
| Manganese (Mn) | 1.1000 | 1.4000 |
| Carbon (C) | 0.1700 | 0.2300 |
| Boron (B) | 0.0008 | 0.0050 |
EN 10083-3 20MnB5 Material Mechanical Properties
The EN 10083-3 steels standard also contains requirements for the mechanical properties of steel products, including minimum values for tensile strength, yield strength, elongation, impact energy and hardness. These requirements vary depending on the grade of the steel product, with higher grades requiring higher mechanical property values.
The mechanical properties of the EN 10083-3 20MnB5 steel are as follows:
| YieldRp0.2 | ≤ 845 (MPa) |
| TeileRm | ≤ 711 (MPa) |
| ImpactKV/Ku | 42(J) |
| ElongationA | 41% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 313 |
EN 10083-3 20MnB5 Material Thermal Properties
The thermal performance parameters of the EN 10083-3 20MnB5 steel are as follows:
| Temperature (°C) | 11 | 927 | 321 |
| Modulus of elasticity (GPa) | - | 926 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 13 |
| Thermal conductivity (W/m·°C) | - | 42.3 | 44.2 |
| Specific thermal capacity (J/kg·°C) | - | 311 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.42 | - | - |
| Deity (kg/dm³) | - | - | 324 |
| Poisson’s coefficient, ν | - | - | 243 |
EN 10083-3 20MnB5 Material Machining Technology
EN 10083-3 is a standard for the manufacture of heat-treatable steels. It is widely used in the automotive, construction and agricultural industries as well as other sectors. It offers a high level of strength and wear resistance with a good level of mechanical properties. Standard EN 10083-3 outlines the requirements for the machining of this steel, including its optimum machining parameters, cutting tools and speeds, workpiece setup and coolant selection.