Raw Materials. The main component of brass is copper. The amount of copper varies between 55% and 95% by weight depending on the type of brass and its intended use. Brasses containing a high percentage of copper are made from electrically refined copper that is at least 99.3% pure to minimize the amount of other materials.
Principal Scientist in Boston, Massachusetts Salary. A Principal Scientist in Boston, Massachusetts earns an average salary of $123,925 per year.
Research Scientist Salary. (United States). A Research Scientist earns an average salary of $75,957 per year. Skills that are associated with high pay for this job are Software Development, Engineering Design, Data Modeling, Chemical Process Engineering, and Matlab.ay by Experience Level for Research Scientist. Median of all compensation (including tips, bonus, and overtime) by years of experience.