First thing you have to do is get an answer to the first question. Once you know the chemical composition of the steel, the other questions will be easier to answer. Unfortunetely, I'm not familiar with this material.
The properties of API 2H Grade 60 are specified on API standard 2H. API is the American Petroleum Institute. You can either buy this standard from API (www.api.org) or find someone in India who has it, as for example a University library, an oil company, an engineering firm etc.
Giovanni S. Crisi
Sao Paulo - Brazil