ASTM A213/A213M Type 304LN Introduce
ASTM A213/A213M Type 304LN Steel is a austenitic steel alloy often used in the heat-exchanger and boiler industry. Its widespread usage and properties of the steel make it an important alloy for many applications. The ASTM A213/A213M Type 304LN metal alloy is known for its excellent tensile strength. It has a high yield strength of 205MPa and a tensile strength ranging from 415-827MPa. Some of the steel types have a higher tensile strength than others, with the T5 type having a maximum strength of 827MPa and the T22 type having a maximum strength of 893MPa.
Smelting temperature:1648°C - 1692°C
Application:Seamless ferritic and austenitic alloy steel boilers, superheaters and heat exchanger tubes
ASTM A213/A213M Type 304LN Material Chemical Composition
The chemical composition of the ASTM A213/A213M Type 304LN steel are as follows:
| Element | Min | Max |
|---|---|---|
| Nitrogen (N) | 0.1000 | 0.1600 |
| Nickel (Ni) | 8.0000 | 11.0000 |
| Chromium (Cr) | 18.0000 | 20.0000 |
| PhOsphorus (P) | - | 0.0450 |
| Sulfur (S) | - | 0.0300 |
| Manganese (Mn) | - | 2.0000 |
| Silicon (Si) | - | 1.0000 |
| Carbon (C) | - | 0.0350 |
| PhOsphorus (P) | - | 0.0400 |
| Silicon (Si) | - | 0.7500 |
ASTM A213/A213M Type 304LN Material Mechanical Properties
The mechanical properties of the ASTM A213/A213M Type 304LN steel are as follows:
| YieldRp0.2 | ≤ 789 (MPa) |
| TeileRm | ≤ 253 (MPa) |
| ImpactKV/Ku | 22(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) | 112 |
ASTM A213/A213M Type 304LN Material Thermal Properties
The thermal performance parameters of the ASTM A213/A213M Type 304LN steel are as follows:
| Temperature (°C) | 11 | 637 | 844 |
| Modulus of elasticity (GPa) | - | 368 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 31 |
| Thermal conductivity (W/m·°C) | - | 24.3 | 13.2 |
| Specific thermal capacity (J/kg·°C) | - | 214 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 312 |
| Poisson’s coefficient, ν | - | - | 423 |