GB/T 5216 45AH Introduce
The high chromium content in GB/T 5216 45AH steel is responsible for its superior corrosion resistance and toughness. The chromium combines with other elements in the steel to form hard, protective oxide layers that prevent corrosion from occurring. These layers are very stable and can withstand a wide range of temperatures and environments.
Smelting temperature:1235°C - 1293°C
Application:Guaranteed hardenable structural steel
GB/T 5216 45AH Material Chemical Composition
The chemical composition of the GB/T 5216 45AH steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | 0.1700 | 0.3700 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0300 |
| Nickel (Ni) | - | 0.3000 |
| Manganese (Mn) | 0.5000 | 0.8500 |
| Copper (Cu) | - | 0.2500 |
| Chromium (Cr) | - | 0.2500 |
| Carbon (C) | 0.4200 | 0.5000 |
GB/T 5216 45AH Material Mechanical Properties
GB/T 5216 45AH steel can be evaluated through a variety of hardness tests, including a Rockwell Hardness Test, Vickers Hardness Test, and Brinnel Hardness Test. All of these tests measure the hardness of the steel in terms of resistance to indentation. The Rockwell Hardness Test is the most commonly used of the three, as it uses a diamond-tipped cone to measure the materials indentation resistance. On the Rockwell C-scale, GB/T 5216 45AH can be expected to achieve hardness values between 190 and 326, depending on its final treatment process.
The mechanical properties of the GB/T 5216 45AH steel are as follows:
| YieldRp0.2 | ≤ 143 (MPa) |
| TeileRm | ≤ 678 (MPa) |
| ImpactKV/Ku | 11(J) |
| ElongationA | 32% |
| Reduction in cross section on fractureZ | 14% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 212 |
GB/T 5216 45AH Material Thermal Properties
The thermal performance parameters of the GB/T 5216 45AH steel are as follows:
| Temperature (°C) | 23 | 768 | 499 |
| Modulus of elasticity (GPa) | - | 319 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 43 |
| Thermal conductivity (W/m·°C) | - | 33.3 | 21.2 |
| Specific thermal capacity (J/kg·°C) | - | 121 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.31 | - | - |
| Deity (kg/dm³) | - | - | 321 |
| Poisson’s coefficient, ν | - | - | 312 |
GB/T 5216 45AH Material Machining Technology
Machining involves the use of tools to cut, shape, and otherwise alter raw materials. Common machining operations that can be used to process GB/T 5216 45AH steel include turning, milling, drilling, reaming, tapping, and honing. In all of these operations, it is important to consider the properties of GB/T 5216 45AH steel. GB/T 5216 45AH steel is a medium-carbon steel that is particularly hard and strong, with an acceptable level of ductility and malleability. As a result, it is particularly resistant to wear and tear, abrasion, and impact forces.