ASTM A409/A409M Type 304L Introduce
ASTM A409/A409M Type 304L is a popular low-alloy steel that is typically used for demanding applications like pressure vessels, boilers, piping, and other parts operating at both high and low temperatures. This steel is heat-treated to improve its mechanical strength and provide corrosion resistance.
Smelting temperature:1527°C - 1286°C
Application:Corrosion resistant or high temperature resistant large diameter welded austenitic stainless steel tube
ASTM A409/A409M Type 304L Material Chemical Composition
The chemical composition of the ASTM A409/A409M Type 304L steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 1.0000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0450 |
| Nickel (Ni) | 8.0000 | 12.0000 |
| Manganese (Mn) | - | 2.0000 |
| Chromium (Cr) | 18.0000 | 20.0000 |
| Carbon (C) | - | 0.0350 |
ASTM A409/A409M Type 304L Material Mechanical Properties
The mechanical properties of the ASTM A409/A409M Type 304L steel are as follows:
| YieldRp0.2 | ≤ 571 (MPa) |
| TeileRm | ≤ 791 (MPa) |
| ImpactKV/Ku | 41(J) |
| ElongationA | 33% |
| Reduction in cross section on fractureZ | 32% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 213 |
ASTM A409/A409M Type 304L Material Thermal Properties
The thermal performance parameters of the ASTM A409/A409M Type 304L steel are as follows:
| Temperature (°C) | 21 | 866 | 276 |
| Modulus of elasticity (GPa) | - | 351 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 22 |
| Thermal conductivity (W/m·°C) | - | 12.3 | 34.2 |
| Specific thermal capacity (J/kg·°C) | - | 143 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.32 | - | - |
| Deity (kg/dm³) | - | - | 323 |
| Poisson’s coefficient, ν | - | - | 141 |