ASTM A249/A249M Type 316H Introduce
ASTM A249/A249M Type 316H is an austenitic stainless steel specifically designed for use in boiler, superheater and heat exchanger tubes, which contain higher amounts of chromium and nickel compared to other stainless steels. This grade of steel is popular for its ability to resist corrosion and oxidation, and for its high strength-to-weight ratio. Due to its outstanding properties, it is ideal for a range of applications, such as pressure vessels, heat exchangers, and condensers.
Smelting temperature:1987°C - 1245°C
Application:Welded austenitic steel tubes for boilers, superheaters, heat exchangers and condensers
ASTM A249/A249M Type 316H Material Mechanical Properties
Weldability is a measure of how easily a material can be joined to another material. ASTM A249/A249M Type 316H steel is highly weldable and is able to be easily joined to other materials by welding processes such as arc welding, Tungsten Inert Gas (TIG) welding, and Metal Inert Gas (MIG) welding.
The mechanical properties of the ASTM A249/A249M Type 316H steel are as follows:
| YieldRp0.2 | ≤ 358 (MPa) |
| TeileRm | ≤ 418 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 34% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 134 |
ASTM A249/A249M Type 316H Material Thermal Properties
The thermal performance parameters of the ASTM A249/A249M Type 316H steel are as follows:
| Temperature (°C) | 21 | 772 | 659 |
| Modulus of elasticity (GPa) | - | 182 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 41 |
| Thermal conductivity (W/m·°C) | - | 32.3 | 23.2 |
| Specific thermal capacity (J/kg·°C) | - | 211 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.14 | - | - |
| Deity (kg/dm³) | - | - | 212 |
| Poisson’s coefficient, ν | - | - | 342 |
ASTM A249/A249M Type 316H Material Machining Technology
When it comes to machining, ASTM A249/A249M Type 316H steel is extremely versatile. It possesses several advantages that make it an ideal solution for many industrial applications. One of the biggest advantages of machining ASTM A249/A249M Type 316H steel is its superior resistance to corrosion and abrasion. This quality makes it suitable for both indoors and outdoors applications, as well as use in environments with high levels of moisture or moisture changes. The material is also highly resistant to general wear and tear as well as cracking, meaning that it can handle high-stress applications. Furthermore, ASTM A249/A249M Type 316H steel can be formed into a range of intricate and complex shapes, making it an ideal solution for intricate and complex designs.