ASTM A663/A663M Grade 55 Introduce
ASTM A663/A663M Grade 55 steel is an alloy steel used in a variety of applications, including automotive, aerospace and industrial components. The steel is often referred to as a "low carbon alloy" steel and is composed of iron and 0.3-0.5% carbon, as well as a variety of other elements depending on the application. This steel is known for its low levels of strength, both in terms of tensile and yield strength, and is often used in applications where a stronger steel is not necessary.
Smelting temperature:1357°C - 1953°C
Application:Mechanical properties of commercial grade carbon steel rods
ASTM A663/A663M Grade 55 Material Chemical Composition
The chemical composition of the ASTM A663/A663M Grade 55 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Sulfur (S) | - | 0.0500 |
| PhOsphorus (P) | - | 0.0400 |
| Copper (Cu) | - | 0.2000 |
ASTM A663/A663M Grade 55 Material Mechanical Properties
The mechanical properties of the ASTM A663/A663M Grade 55 steel are as follows:
| YieldRp0.2 | ≤ 367 (MPa) |
| TeileRm | ≤ 298 (MPa) |
| ImpactKV/Ku | 32(J) |
| ElongationA | 22% |
| Reduction in cross section on fractureZ | 22% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 211 |
ASTM A663/A663M Grade 55 Material Thermal Properties
The thermal performance parameters of the ASTM A663/A663M Grade 55 steel are as follows:
| Temperature (°C) | 12 | 271 | 958 |
| Modulus of elasticity (GPa) | - | 947 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 44 |
| Thermal conductivity (W/m·°C) | - | 33.3 | 41.2 |
| Specific thermal capacity (J/kg·°C) | - | 324 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 233 |
| Poisson’s coefficient, ν | - | - | 314 |