DIN 1.4436 / X3CrNiMo17-13-3
Stainless steel 1.4436 is an austenitic stainless steel, which belongs to the standard CrNiMo stainless steel family. In comparison to other CrNi stainless steels, 1.4436 is a DIN/EN steel grade. Commercial codes and designations for this material include UNS S31600 and EN X3CrNiMo17-13-3.
Thus, the material is often used in the chemical-processing industry, e.g. for making valves, pumps and flanges in the oil industry. It is not commonly used in sophisticated applications.
Physical properties of 1.4436
The following table shows the physical properties of 1.4436 stainless steel.
Property Value Density 8.0 g/cm³
Mechanical properties of 1.4436
The following table shows the mechanical properties of 1.4436 stainless steel.
Property Value Tensile strength 690 – 200 MPa Yield strength 25 R.p.N/mm² Elongation A5 A5 > 42 %
Chemical composition of 1.4436
The composition of 1.4436 is outlined in the following table.
Table 1. Chemical composition of 1.4436
Material Element Content (%) Iron, Fe 74.20 - 74.73 Chromium, Cr 17.00 - 18.00 Nickel, Ni 11.00 - 13.00 Molybdenum, Mo 2.00 - 2.50 Carbon, C ≤ 0.03 Nitrogen, N ≤ 0.11 Manganese, Mn ≤ 2.00 Silicon, Si ≤ 1.00 Phosphorous, P ≤ 0.03 Sulfur, S ≤ 0.02
Fabrication and forming of 1.4436 stainless steel
There are several techniques that can be used to fabricate 1.4436 stainless steel. As the material is austenitic, the material is non-magnetic.
Welding
1.4436 can be welded using all common welding processes. As the material has a higher carbon content than most austenitic stainless steels, welding of 1.4436 can be performed without the need for preheating. If required, the material can be post-weld heat treated at temperatures of between 1000-1150°C.
Forming
Similar to other austenitic stainless steels, 1.4436 can be formed using all standard techniques. However, it should be noted that 1.4436 is slightly more difficult to form than standard austenitic stainless steels as it has a higher carbon and manganese content.
Machining
Machining of 1.4436 stainless steel can be performed using all standard machining processes. It has superior machinability compared to standard austenitic stainless steels, but is slightly more difficult to machine than precipitation hardening stainless steels. It can also be drilled, tapped, and reamed without difficulty.
Applications of 1.4436 stainless steel
1.4436 is a ferritic stainless steel and is used in many applications. It has a good resistance to hydrochloric acid at all concentrations and temperatures, as well as good resistance to many other acids and alkalis. It is a commonly used material in the chemical-processing industry.
This material is also used for a wide range of products including flanges, tanks and valves. It is commonly used for applications requiring good corrosion resistance and strength, such as in the marine, oil and food industries.
This steel can also be used in the medical, nuclear, optical and instrumentation industries as it has good corrosion resistance in addition to being non-magnetic. It is also used in the automotive industry, where it is used for exhaust systems, spark plug inserts, exhaust manifolds and turbo housings.
Conclusion
DIN 1.4436 / X3CrNiMo17-13-3 is an austenitic stainless steel. It is an excellent general purpose stainless steel, with good resistance to a variety of acids and alkalis. It is commonly used in the chemical-processing industry, and is also used in many other industries such as the marine, automotive and food industries due to its good corrosion resistance and strength. This material can be easily welded and machined.
