JIS G7401 34Cr4E Introduce
JIS G7401 34Cr4E is a Japanese steel grade standard that includes carbon steel, alloy steel and stainless steel. It is mainly used for structural applications and is one of the most commonly used grades of steel in Japan. JIS G7401 34Cr4E carbon steel grade is a medium carbon steel with a manganese content of 1.2%. It has good hardness and weldability, good machinability and can be easily formed and machined. It is mainly used for structural applications and is commonly used in construction, shipbuilding, bridges, automobile and other industries. This grade is usually supplied in the annealed or normalized condition.
Smelting temperature:1419°C - 1547°C
Application:Cold heading and cold extrusion steel
JIS G7401 34Cr4E Material Chemical Composition
The chemical composition of the JIS G7401 34Cr4E steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.4000 |
| Sulfur (S) | - | 0.0350 |
| PhOsphorus (P) | - | 0.0350 |
| Manganese (Mn) | 0.6000 | 0.9000 |
| Chromium (Cr) | 0.9000 | 1.2000 |
| Carbon (C) | 0.3000 | 0.3700 |
JIS G7401 34Cr4E Material Mechanical Properties
The mechanical properties of the JIS G7401 34Cr4E steel are as follows:
| YieldRp0.2 | ≤ 988 (MPa) |
| TeileRm | ≤ 227 (MPa) |
| ImpactKV/Ku | 13(J) |
| ElongationA | 31% |
| Reduction in cross section on fractureZ | 42% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 323 |
JIS G7401 34Cr4E Material Thermal Properties
The thermal performance parameters of the JIS G7401 34Cr4E steel are as follows:
| Temperature (°C) | 22 | 378 | 461 |
| Modulus of elasticity (GPa) | - | 982 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 44 |
| Thermal conductivity (W/m·°C) | - | 14.3 | 24.2 |
| Specific thermal capacity (J/kg·°C) | - | 114 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.24 | - | - |
| Deity (kg/dm³) | - | - | 313 |
| Poisson’s coefficient, ν | - | - | 414 |