EN 10083-1 25CrMoS4 Introduce
Heat treatment is an area of special importance, as it affects the structure of steel by controlling the way it responds to the surrounding environment. The standard outlines the various steps such as quenching, tempering, and annealing, as well as their respective time frames, all of which are necessary to ensure an even and effective result. The mechanical tests, such as the tensile strength test, impact test, and metallographic test, are designed to ensure the quality of the steel is in accordance with the specifications set forth in EN 10083-1 25CrMoS4.
Smelting temperature:1972°C - 1631°C
Application:Quenched and tempered steel - Part 1: General delivery technical conditions
EN 10083-1 25CrMoS4 Material Chemical Composition
The chemical composition of the EN 10083-1 25CrMoS4 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Molybdenum (Mo) | 0.1500 | 0.3000 |
| Chromium (Cr) | 0.9000 | 1.2000 |
| PhOsphorus (P) | - | 0.0350 |
| Sulfur (S) | 0.0200 | 0.0400 |
| Manganese (Mn) | 0.6000 | 0.9000 |
| Silicon (Si) | - | 0.4000 |
| Carbon (C) | 0.2200 | 0.2900 |
EN 10083-1 25CrMoS4 Material Mechanical Properties
Yield strength is one of the most important mechanical properties of any material and EN 10083-1 25CrMoS4steel is no exception. It is the amount of stress required to cause a permanent deformation in the material. The higher the yield strength of a material, the harder it is to deform it and the better it is for use in critical structures. EN 10083-1 25CrMoS4 steel has an excellent yield strength of 410-530 MPa which makes it suitable for use in highly stressed structures and components.
The mechanical properties of the EN 10083-1 25CrMoS4 steel are as follows:
| YieldRp0.2 | ≤ 836 (MPa) |
| TeileRm | ≤ 794 (MPa) |
| ImpactKV/Ku | 34(J) |
| ElongationA | 42% |
| Reduction in cross section on fractureZ | 33% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 311 |
EN 10083-1 25CrMoS4 Material Thermal Properties
The thermal performance parameters of the EN 10083-1 25CrMoS4 steel are as follows:
| Temperature (°C) | 32 | 787 | 382 |
| Modulus of elasticity (GPa) | - | 135 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 11 |
| Thermal conductivity (W/m·°C) | - | 23.3 | 14.2 |
| Specific thermal capacity (J/kg·°C) | - | 413 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.31 | - | - |
| Deity (kg/dm³) | - | - | 331 |
| Poisson’s coefficient, ν | - | - | 223 |
EN 10083-1 25CrMoS4 Material Machining Technology
When machining EN 10083-1 25CrMoS4 steel it is necessary to use minimal pressure. Too much pressure can cause the steel to deform, resulting in an incorrect part. Additionally, it is important to ensure that the tool and workpiece are at the same temperature in order to prevent warping and thermal tension. If possible, set up the machine in a ventilated area to further promote cooling.