ASTM A675/A675M Grade 450L Introduce
ASTM A675/A675M Grade 450L 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:1555°C - 1677°C
Application:Mechanical properties of special hot rolled carbon steel rods
ASTM A675/A675M Grade 450L Material Chemical Composition
The chemical composition of the ASTM A675/A675M Grade 450L steel are as follows:
| Element | Min | Max |
|---|---|---|
| PhOsphorus (P) | - | 0.0400 |
| Sulfur (S) | - | 0.0500 |
| Copper (Cu) | 0.2000 | - |
| Lead (Pb) | 0.1500 | 0.3500 |
ASTM A675/A675M Grade 450L Material Mechanical Properties
The mechanical properties of the ASTM A675/A675M Grade 450L steel are as follows:
| YieldRp0.2 | ≤ 758 (MPa) |
| TeileRm | ≤ 898 (MPa) |
| ImpactKV/Ku | 42(J) |
| ElongationA | 41% |
| Reduction in cross section on fractureZ | 24% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 433 |
ASTM A675/A675M Grade 450L Material Thermal Properties
The thermal performance parameters of the ASTM A675/A675M Grade 450L steel are as follows:
| Temperature (°C) | 13 | 413 | 999 |
| Modulus of elasticity (GPa) | - | 914 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 14 |
| Thermal conductivity (W/m·°C) | - | 24.3 | 23.2 |
| Specific thermal capacity (J/kg·°C) | - | 212 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.33 | - | - |
| Deity (kg/dm³) | - | - | 344 |
| Poisson’s coefficient, ν | - | - | 234 |