What are the types of stainless steel casting materials?

Release time:

2023/03/11

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Firstly, based on different chemical compositions, the materials of stainless steel castings can be subdivided into chromium stainless steel castings, chromium nickel stainless steel castings, and chromium nickel nitrogen stainless steel castings. At this point, it is necessary to pay attention to the carbon content of the precipitated carbides in the composition. For corrosion resistance, the lower the C content, the better. However, for high temperature resistance, the C content is relatively high, so it can be selected according to the needs.

Firstly, based on different chemical compositions, the materials of stainless steel castings can be subdivided into chromium stainless steel castings, chromium nickel stainless steel castings, and chromium nickel nitrogen stainless steel castings. At this point, it is necessary to pay attention to the carbon content of the precipitated carbides in the composition. For corrosion resistance, the lower the C content, the better. However, for high temperature resistance, the C content is relatively high, so it can be selected according to the needs.
Secondly, according to the differences in corrosion resistance, stainless steel castings can be divided into acid resistant steel castings and ordinary stainless steel castings.
Finally, according to the different matrix structures of stainless steel castings, their materials can be subdivided into austenitic stainless steel castings, martensitic stainless steel castings, ferritic stainless steel castings, austenitic ferritic stainless steel castings and precipitation hardening stainless steel castings. The following is a specific introduction to the above stainless steel casting materials.
1. Austenitic stainless steel
This type of stainless steel casting can be said to have the widest application range, and the 304 and 316 stainless steel materials we often mention are austenitic stainless steel materials. This material can improve the performance of stainless steel castings, but due to the large shrinkage amplitude, there may be concentrated shrinkage cavities during the casting process. In addition, if it is a stainless steel casting with titanium added, the timing of addition should be carefully controlled during casting, otherwise it will affect the qualification rate of the casting.
2. martensite stainless steel
Cr13 is often used for casting martensite stainless steel castings. It can be divided into 0, 1, 2, 3 and 4Cr13 according to the content of carbon element in the materials. It belongs to chromium stainless steel. As the carbon content increases, the corrosion resistance will gradually decrease. As a stainless steel casting material with high carbon content, it has strong hardness and strength. But the Cr13 stainless steel material also has a significant shrinkage, so attention should be paid to accelerating the pouring speed and increasing the pouring temperature during pouring.
3. Ferritic stainless steel
Ferritic stainless steel materials contain a large amount of chromium, with a content of about 13% -30%. This type of stainless steel casting has strong corrosion and oxidation resistance, and performs well even at high temperatures, making it often used as a heat-resistant steel. However, the disadvantage is poor welding performance and low impact toughness, which can be replaced by austenitic stainless steel in some usage scenarios.
4. Austenitic ferrite duplex stainless steel
In order to improve its welding performance, metal strength, and corrosion resistance, a large amount of ferrite is added to this type of stainless steel, which exhibits superior corrosion resistance even in strong acid environments. Therefore, it is often used in the petroleum industry.
5. Precipitation hardened stainless steel
This type of stainless steel casting material has a high content of nickel, chromium, and low carbon, which not only has strong corrosion and oxidation resistance, but also has high strength and good plasticity. The disadvantage is that inclusions are prone to occur during the casting process, so attention should be paid to the process during pouring.
The above is the answer I have compiled for everyone regarding the material of stainless steel castings, hoping to be helpful to everyone. If you want to learn more about metal castings, you can directly send me a private message to provide you with more answers.