Other contributors have said "Scm435 is what type of steel?" is the same question as "What is the IS equivalent of SCM435?" If you believe that these are not asking the same thing and should be answered differently, click here
The two values are equivalent in that they both represent around 4/10ths. However, 0.40 has one more significant figure, making it more precise than 0.4. Do not confuse "equivalent" with "equal",...