GB/T 5216 A20215 Introduce
GB/T 5216 A20215 steel is an alloy steel with a high iron content and a high chromium content. The chromium combines with other elements in the steel to form hard, protective oxide layers that prevent corrosion from occurring. The chemical composition of the steel has a strong influence on its mechanical properties, such as tensile strength, toughness and ductility. It is an excellent choice for high-strength and highly durable applications, as it has superior corrosion resistance, toughness and strength.
Smelting temperature:1521°C - 1133°C
Application:Guaranteed hardenable structural steel
GB/T 5216 A20215 Material Chemical Composition
The chemical composition of the GB/T 5216 A20215 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | 0.1700 | 0.3700 |
| Sulfur (S) | - | 0.0350 |
| PhOsphorus (P) | - | 0.0350 |
| Nickel (Ni) | - | 0.3000 |
| Manganese (Mn) | 0.5500 | 0.9000 |
| Copper (Cu) | - | 0.3000 |
| Chromium (Cr) | 0.8500 | 1.2500 |
| Carbon (C) | 0.1700 | 0.2300 |
GB/T 5216 A20215 Material Mechanical Properties
GB/T 5216 A20215 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 A20215 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 A20215 steel are as follows:
| YieldRp0.2 | ≤ 193 (MPa) |
| TeileRm | ≤ 483 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 23% |
| Reduction in cross section on fractureZ | 42% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 122 |
GB/T 5216 A20215 Material Thermal Properties
The thermal performance parameters of the GB/T 5216 A20215 steel are as follows:
| Temperature (°C) | 33 | 289 | 622 |
| Modulus of elasticity (GPa) | - | 284 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 41 |
| Thermal conductivity (W/m·°C) | - | 43.3 | 31.2 |
| Specific thermal capacity (J/kg·°C) | - | 314 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.41 | - | - |
| Deity (kg/dm³) | - | - | 122 |
| Poisson’s coefficient, ν | - | - | 223 |
GB/T 5216 A20215 Material Machining Technology
GB/T 5216 A20215 steel is a popular variety of steel that is commonly used for the production of various components, including automobile parts, nuts and bolts, and industrial and marine components. Machining GB/T 5216 A20215 steel requires the use of the proper tools and techniques. This includes the use of robust cutting tools and machines, appropriate cutting parameters, and the use of coolants or lubricants to reduce friction and wear. When machining this type of steel, it is important to experiment with different parameters and tools in order to find the most efficient and safe way of working.