ASTM A240/A240M S34800 Introduce
The ASTM A240/A240M S34800 steel is an incredibly versatile and economical metal that has been used in numerous industrial applications. It is suitable for a wide range of applications due to its unique properties which provide it with high strength and good corrosion resistance. It is also extremely ductile and malleable, which allows it to be easily formed into the desired shape and size. The ASTM A240/A240M S34800 steel is available in various grades, sizes and shapes, making it an ideal choice for a wide range of industrial and construction applications.
Smelting temperature:1392°C - 1779°C
Application:Heat-resistant chrome and chrome-nickel stainless steel sheets, sheets and strips for pressure vessels
ASTM A240/A240M S34800 Material Chemical Composition
The chemical composition of the ASTM A240/A240M S34800 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Tantalum (Ta) | - | 0.1000 |
| Silicon (Si) | - | 0.7500 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0450 |
| Nickel (Ni) | 9.0000 | 13.0000 |
| (Nb+Ta) | - | 1.0000 |
| Manganese (Mn) | - | 2.0000 |
| Chromium (Cr) | 17.0000 | 19.0000 |
| Cobalt (Co) | - | 0.2000 |
| Carbon (C) | - | 0.0800 |
ASTM A240/A240M S34800 Material Mechanical Properties
Due to the high chromium and nickel content, ASTM A240/A240M S34800 steel is highly resistant to corrosion and has a high level of corrosion resistance over a wide range of corrosive environments. The molybdenum content improves the corrosion resistance of the steel and prevents pitting, crevice corrosion, and stress corrosion cracking.
The mechanical properties of the ASTM A240/A240M S34800 steel are as follows:
| YieldRp0.2 | ≤ 895 (MPa) |
| TeileRm | ≤ 576 (MPa) |
| ImpactKV/Ku | 14(J) |
| ElongationA | 33% |
| Reduction in cross section on fractureZ | 12% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 134 |
ASTM A240/A240M S34800 Material Thermal Properties
The thermal performance parameters of the ASTM A240/A240M S34800 steel are as follows:
| Temperature (°C) | 13 | 158 | 984 |
| Modulus of elasticity (GPa) | - | 593 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 42 |
| Thermal conductivity (W/m·°C) | - | 22.3 | 24.2 |
| Specific thermal capacity (J/kg·°C) | - | 222 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.14 | - | - |
| Deity (kg/dm³) | - | - | 414 |
| Poisson’s coefficient, ν | - | - | 131 |
ASTM A240/A240M S34800 Material Machining Technology
When machining ASTM A240/A240M S34800 steel, the most important factor is machining speed and cutting forces. Machining speeds should be kept as low as possible, and a slow and steady cutting rate is recommended. This will reduce vibrations, wear on cutting tools, and will minimize the material's tendency to work harden during the machining process. An adequate amount of coolant should also be used to facilitate a smooth cut.