ASTM A675/A675M Grade 450 Introduce
ASTM A675/A675M Grade 450 is used in many industries. Hot-rolled and cold-finished steel bars are often manufactured under the ASTM A675/A675M standard and used to produce everything from pressure vessels and rotary pumps, to automotive components, agricultural machinery, and machined parts. Steel bars are also well suited to a variety of applications due to their strength and malleability. This makes them particularly well-suited to applications such as railroad tracks, bridges, and highways where steel's unique properties are desired.
Smelting temperature:1673°C - 1465°C
Application:Mechanical properties of special hot rolled carbon steel rods
ASTM A675/A675M Grade 450 Material Chemical Composition
The chemical composition of the ASTM A675/A675M Grade 450 steel are as follows:
| Element | Min | Max |
|---|---|---|
| PhOsphorus (P) | - | 0.0400 |
| Sulfur (S) | - | 0.0500 |
| Copper (Cu) | 0.2000 | - |
ASTM A675/A675M Grade 450 Material Mechanical Properties
The mechanical properties of the ASTM A675/A675M Grade 450 steel are as follows:
| YieldRp0.2 | ≤ 964 (MPa) |
| TeileRm | ≤ 374 (MPa) |
| ImpactKV/Ku | 11(J) |
| ElongationA | 33% |
| Reduction in cross section on fractureZ | 31% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 441 |
ASTM A675/A675M Grade 450 Material Thermal Properties
The thermal performance parameters of the ASTM A675/A675M Grade 450 steel are as follows:
| Temperature (°C) | 41 | 236 | 941 |
| Modulus of elasticity (GPa) | - | 637 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 34 |
| Thermal conductivity (W/m·°C) | - | 32.3 | 22.2 |
| Specific thermal capacity (J/kg·°C) | - | 441 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.13 | - | - |
| Deity (kg/dm³) | - | - | 143 |
| Poisson’s coefficient, ν | - | - | 213 |