GB/T 5216 A20217 Introduce
GB/T 5216 A20217 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:1172°C - 1656°C
Application:Guaranteed hardenable structural steel
GB/T 5216 A20217 Material Chemical Composition
The chemical composition of the GB/T 5216 A20217 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | 0.1700 | 0.3700 |
| Sulfur (S) | - | 0.0250 |
| PhOsphorus (P) | - | 0.0250 |
| Nickel (Ni) | - | 0.3000 |
| Manganese (Mn) | 0.5500 | 0.9000 |
| Copper (Cu) | - | 0.2500 |
| Chromium (Cr) | 0.8500 | 1.2500 |
| Carbon (C) | 0.1700 | 0.2300 |
GB/T 5216 A20217 Material Mechanical Properties
Fatigue tests are used to determine the amount of stress that a material can handle over long periods of time. During a fatigue test, a sample of GB/T 5216 A20217 steel is placed in a machine and subjected to regular and repeated cycles of stress until it fails. Fatigue tests on this steel can show that it can withstand up to 590 MPa without breaking for up to 1000 load cycles.
The mechanical properties of the GB/T 5216 A20217 steel are as follows:
| YieldRp0.2 | ≤ 399 (MPa) |
| TeileRm | ≤ 166 (MPa) |
| ImpactKV/Ku | 23(J) |
| ElongationA | 34% |
| Reduction in cross section on fractureZ | 41% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 334 |
GB/T 5216 A20217 Material Thermal Properties
The thermal performance parameters of the GB/T 5216 A20217 steel are as follows:
| Temperature (°C) | 23 | 714 | 578 |
| Modulus of elasticity (GPa) | - | 181 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 22 |
| Thermal conductivity (W/m·°C) | - | 44.3 | 34.2 |
| Specific thermal capacity (J/kg·°C) | - | 314 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.11 | - | - |
| Deity (kg/dm³) | - | - | 213 |
| Poisson’s coefficient, ν | - | - | 333 |
GB/T 5216 A20217 Material Machining Technology
GB/T 5216 A20217 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 A20217 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.