JIS G7401 CC21K Introduce
JIS G7401 CC21K is a cost-effective and reliable material, making it an ideal choice for a variety of applications. This steel grade has excellent forgeability, machinability, hardenability and cold workability. It provides superior tensile strength and yield strength as well as good ductility and toughness. JIS G7401 CC21K is also resistant to corrosion and has good weldability when used in the appropriate environment. It is available in a wide range of forms and grades, making it suitable for a variety of applications.
Smelting temperature:1798°C - 1759°C
Application:Cold heading and cold extrusion steel
JIS G7401 CC21K Material Chemical Composition
The chemical composition of the JIS G7401 CC21K steel are as follows:
| Element | Min | Max |
|---|---|---|
| Sulfur (S) | - | 0.0400 |
| PhOsphorus (P) | - | 0.0400 |
| Manganese (Mn) | 0.3000 | 0.6000 |
| Silicon (Si) | 0.1500 | 0.3500 |
| Carbon (C) | 0.1800 | 0.2300 |
JIS G7401 CC21K Material Mechanical Properties
The mechanical properties of the JIS G7401 CC21K steel are as follows:
| YieldRp0.2 | ≤ 934 (MPa) |
| TeileRm | ≤ 172 (MPa) |
| ImpactKV/Ku | 43(J) |
| ElongationA | 11% |
| Reduction in cross section on fractureZ | 14% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 434 |
JIS G7401 CC21K Material Thermal Properties
The thermal performance parameters of the JIS G7401 CC21K steel are as follows:
| Temperature (°C) | 42 | 748 | 349 |
| Modulus of elasticity (GPa) | - | 753 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 23 |
| Thermal conductivity (W/m·°C) | - | 31.3 | 13.2 |
| Specific thermal capacity (J/kg·°C) | - | 342 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.34 | - | - |
| Deity (kg/dm³) | - | - | 442 |
| Poisson’s coefficient, ν | - | - | 414 |