ASTM A519 Grade 4042 Introduce
ASTM A519 Grade 4042 tubing is an excellent choice for parts that need to be able to withstand high levels of stress and tension. The various grades of steel offer different strengths and levels of flexibility, making them suitable for a variety of applications. ASTM A519 Grade 4042 tubing is an excellent choice for parts that require strength and superior performance.
Smelting temperature:1615°C - 1553°C
Application:Seamless carbon steel and alloy steel mechanical tube
ASTM A519 Grade 4042 Material Chemical Composition
The chemical composition of the ASTM A519 Grade 4042 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Copper (Cu) | - | 0.3500 |
| Molybdenum (Mo) | 0.2000 | 0.3000 |
| Nickel (Ni) | - | 0.2500 |
| Chromium (Cr) | - | 0.2000 |
| PhOsphorus (P) | - | 0.0400 |
| Sulfur (S) | - | 0.0400 |
| Manganese (Mn) | 0.7000 | 0.9000 |
| Silicon (Si) | 0.1500 | 0.3500 |
| Carbon (C) | 0.4000 | 0.4500 |
| Nickel (Ni) | - | 0.2500 |
| Copper (Cu) | - | 0.3500 |
| Chromium (Cr) | - | 0.2000 |
ASTM A519 Grade 4042 Material Mechanical Properties
Hardness is a measure of a material's resistance to surface scratching or indentation. ASTM A519 Grade 4042 steel has a Brinell hardness range of 120 to 220, depending on the grade. Higher grades of steel tend to have higher hardness.
The mechanical properties of the ASTM A519 Grade 4042 steel are as follows:
| YieldRp0.2 | ≤ 595 (MPa) |
| TeileRm | ≤ 132 (MPa) |
| ImpactKV/Ku | 44(J) |
| ElongationA | 42% |
| Reduction in cross section on fractureZ | 21% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 221 |
ASTM A519 Grade 4042 Material Thermal Properties
The thermal performance parameters of the ASTM A519 Grade 4042 steel are as follows:
| Temperature (°C) | 43 | 919 | 729 |
| Modulus of elasticity (GPa) | - | 166 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 21 |
| Thermal conductivity (W/m·°C) | - | 23.3 | 31.2 |
| Specific thermal capacity (J/kg·°C) | - | 341 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.13 | - | - |
| Deity (kg/dm³) | - | - | 233 |
| Poisson’s coefficient, ν | - | - | 412 |
ASTM A519 Grade 4042 Material Machining Technology
When machining ASTM A519 Grade 4042, it is important to observe the correct cutting speed and feeds as they are directly related to the quality of the finished part. For best results, the cutting speed should be adjusted to between 80–120 m/min and the feeds should be between 0.8–1.2 mm/rev. Apart from this, it is important to avoid cutting too deep or too quickly in order to minimize the risks of chipping or distortion.