253MA Grade material is used at high temperatures.It has excellent resistance to oxidation and excellent strength at elevated temperatures.This grade has very good high temperature corrosion and erosion resistance in most environments.It also has good form ability and weld ability properties.Most suitable temperature range is 850-1100¡æ(standard grade 304 is qualified for pressure applications up to 800¡æ).253MA contain about 22% chromium,11% nickel and 0.09% carbon,with about 0.05% of the rare earth metal cerium added to improve the protective ability of the oxide.