Differences between 15CrMo and 1Cr5Mo
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Materials such as 15CrMo and 1Cr5Mo are often used in catalytic converter equipment. What are the differences between these two materials? Where should 15CrMo be used, and where should 1Cr5Mo be used? I hope to receive guidance from all the teachers. Thank you!
15CrMo and 1Cr5Mo have different carbon and chromium contents, as well as different operating temperatures； When 15CrMo is used for pressure-bearing components of housings, the temperature should not exceed 550°C; when it is used for internal components, the temperature should not exceed 590°C℃ ； When 1Cr5Mo is used for pressure-bearing components of the shell, the temperature should not exceed 600°C; when it is used for internal components, the temperature should not exceed 650°C. The internals of the settler are made of 15CrMo(R), those of the regenerator are made of S30408, and the tube bundles of the internal heat exchanger are made of 1Cr5Mo.
The metal structure of 15CrMo is pearlite, and it is widely used in the manufacture of steam turbines and boilers, often in applications such as heat exchanger tubes and high-temperature, high-pressure vessels. These steels have a low coefficient of thermal expansion, high thermal conductivity, and good processability; they can be used at temperatures ranging from 450 to 620 degrees Celsius. The microstructure of 1Cr5Mo is martensite; it exhibits good oxidation resistance at around 650 degrees Celsius, good heat strength below 600 degrees Celsius, as well as good shock absorption and thermal conductivity, which makes it widely used in steam turbines. However, this type of steel has a strong tendency to harden and poor weldability.
The differences between 1Cr5Mo and 15CrMo were already explained above; to add more: under the same temperature and pressure conditions, 1Cr5Mo has higher strength than 15CrMo, and it also has a higher probability of crack formation compared to the latter. This material is mainly used in the petrochemical refining industry (GB9948); it is not listed among the materials suitable for use in steam systems (GB5310)~~~~