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27MnCrB5 Steel
Steel name: 27MnCrB5
Diagram No.: 7275
Type of diagram: CCT
Mat. No. (Wr. Nr.) designation: 1.7182
DIN designation: 27MnCrB5
Chemical composition in weight %: 0.25% C, 0.21% Si, 1.24% Mn, 0.34% Cr, 0.01% Ni, 0.03% Al, 0.042% Ti, 0.002% B, 0.004% N
Steel group: Boron steels
Note: For this steel grade the austenization temperature was fixed at 880°C and the
samples were heated for eight minutes. For a heating speed of 200 K/min, the
eutectoid reaction temperature Ac1 is 730°C and the start temperature of primary ferrite to austenite transformation point Ac3 reaches 820°C. The
martensite start temperature Ms is 400°C. It is seen that with cooling rates
higher than 20°C/s, the fully martensitic microstructure is achieved. The
lowest cooling rates result in ferritic – pearlitic microstructure which is in
good agreement with as-received results. Figure illustrates the CCT
diagram of investigate steel.
Reference: Not shown in this demo version.
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Disclaimer: The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.