Figure 12.14 The hardness of carbon steel with martensitic or pearlitic structures
as a
function of carbon content
to transform to martensite M
s
depends on the carbon content of the steel (see
Figure 11.10 and Table 12.1).
Table 12.1
Relation
of M
s
to carbon content
Carbon content
0.2
0.4
0.8
1.2
MJ°c
490
420
250
150
The temperature at which the transformation from austenite to martensite is
complete M
F
is about 215°C below the M
s
temperatures. Thus for the 0.2 per
cent carbon steel the martensite will be complete by 275°C, th ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month, and much more.