ASME SA-29/SA-29M Grade 4145 Introduce
The ASME SA-29/SA-29M Grade 4145 specification is widely used and accepted in the industry. It is also accepted by many government and private organizations. The specification covers a wide range of bars and is suitable for many applications. It is commonly used in the fabrication of pressure vessels and other components that require hot-rolled carbon steel bars.
Smelting temperature:1991°C - 1644°C
Application:General requirements for hot working and cold finishing carbon steel and alloy steel bars
ASME SA-29/SA-29M Grade 4145 Material Chemical Composition
The chemical composition of the ASME SA-29/SA-29M Grade 4145 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | 0.1500 | 0.3500 |
| Sulfur (S) | - | 0.0400 |
| PhOsphorus (P) | - | 0.0350 |
| Nickel (Ni) | - | 0.2500 |
| Molybdenum (Mo) | 0.1500 | 0.2500 |
| Manganese (Mn) | 0.7500 | 1.0000 |
| Copper (Cu) | - | 0.3500 |
| Chromium (Cr) | 0.8000 | 1.1000 |
| Carbon (C) | 0.4300 | 0.4800 |
ASME SA-29/SA-29M Grade 4145 Material Mechanical Properties
The ductility of ASME SA-29/SA-29M Grade 4145 steel is also rated very highly. The steel exhibits good plasticity and can be bent, twisted, and stretched without failure. This makes it an ideal choice for applications that require parts to be formed and shaped. The impact resistance of ASME SA-29/SA-29M Grade 4145 steel is also noteworthy. The steel is capable of absorbing a high amount of energy before failure, making it an ideal choice for applications that require resistance to shock and vibration.
The mechanical properties of the ASME SA-29/SA-29M Grade 4145 steel are as follows:
| YieldRp0.2 | ≤ 291 (MPa) |
| TeileRm | ≤ 289 (MPa) |
| ImpactKV/Ku | 23(J) |
| ElongationA | 42% |
| Reduction in cross section on fractureZ | 32% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 313 |
ASME SA-29/SA-29M Grade 4145 Material Thermal Properties
The thermal performance parameters of the ASME SA-29/SA-29M Grade 4145 steel are as follows:
| Temperature (°C) | 33 | 443 | 837 |
| Modulus of elasticity (GPa) | - | 733 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 31 |
| Thermal conductivity (W/m·°C) | - | 33.3 | 24.2 |
| Specific thermal capacity (J/kg·°C) | - | 342 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.34 | - | - |
| Deity (kg/dm³) | - | - | 142 |
| Poisson’s coefficient, ν | - | - | 122 |
ASME SA-29/SA-29M Grade 4145 Material Machining Technology
ASME SA-29/SA-29M Grade 4145 steel is a high-strength and low-alloy steel which is known for its exceptional weldability and toughness. It is a common choice for industries that require a combination of strength and durability, such as automotive and aerospace. The machining process is a crucial part of achieving the desired outcome with ASME SA-29/SA-29M Grade 4145 steel, as it helps to shape and optimize the material to the desired specifications.