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0.05C, 0.10C, 0.15C Boron Steels
Steel name: 0.05C, 0.10C, 0.15C Boron Steels
Diagram No.: 7269
Type of diagram: CCT
Chemical composition in weight %:
1.05C steel: 0.05% C, 0.31% Si, 1.52% Mn, 0.0020% B, 0.015% Ti, 0.020% Al
1.1C steel: 0.10% C, 0.31% Si, 1.52% Mn, 0.0023% B, 0.017% Ti, 0.036% Al
1.15C teel: 0.15% C, 0.31% Si, 1.50% Mn, 0.0020% B, 0.018% Ti, 0.041% Al
1.1C-Mo steel: 0.10% C, 0.31% Si, 1.50% Mn, 0.0021% B, 0.017% Ti, 0.034% Al, 0.50% Mo
1.1C-Cr steel: 0.10% C, 0.33% Si, 1.51% Mn, 0.0022% B, 0.015% Ti, 0.026% Al, 0.49% Cr
1.1C-Mo-Cr steel: 0.10% C, 0.33% Si, 1.52% Mn, 0.0022% B, 0.014% Ti, 0.024% Al, 0.50% Mo, 0.50% Cr
Steel group: Boron steels
Note: Top diagram: (a) Continuous cooling transformation (CCT) diagram and (b) hardness profile for the boron-bearing steel specimens
with different carbon contents. The dotted parallel lines indicate the bainite start (Bs) and martensite start (Ms)
temperatures calculated by empirical equations. A critical cooling rate (Vc-90) having the hardness corresponding to
90% martensite structure was measured from the hardness profile, as shown in the arrow for the 0.1C boron-baearing
steel. The upper dark and lower bright symbols indicate the transformation start and finish temperatures, respectively.
Bottom diagram: (a) Continuous cooling transformation (CCT) diagram and (b) hardness profile for the 0.1C, 0.1C-Mo, 0.1C-Cr,
0.1C-Mo-Cr boron-bearing steel specimens. A critical cooling rate (Vc-90) having the hardness corresponding to 90%
martensite structure was measured from the hardness profile, as shown in the arrow for the 0.1C boron-baearing
steel. The upper dark and lower bright symbols indicate the transformation start and finish temperatures, respectively.
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.