CHAMPAK INDUSTRIES STOCK 253MA is a grade combining excellent service properties at high temperatures with ease of fabrication. It resists oxidation at temperatures up to 1150°C and can provide superior service to Grade 310 in carbon, nitrogen and sulphur containing atmospheres.
Another proprietary designation covering this grade is 2111HTR.
253MA contains fairly low nickel content, which gives it some advantage in reducing sulphide atmospheres when compared to high nickel alloys and to Grade 310. The inclusion of high silicon, nitrogen and cerium contents gives the steel good oxide stability, high elevated temperature strength and excellent resistance to sigma phase precipitation.
The austenitic structure gives this grade excellent toughness, even down to cryogenic temperatures.
Typical compositional ranges for grade 253MA stainless steels are given in table 1. Grade Specification Comparison
Approximate grade comparisons for 253MA stainless steels are given in table 4.
Table 4. Grade specifications for 253MA grade stainless steel
Possible Alternative Grades
|These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.|
Possible alternative grades to grade 253MA stainless steels are given in table 5.
Table 1. Composition ranges for 253MA grade stainless steel
Typical mechanical properties for grade 253MA stainless steels are given in table 2.
Table 2. Mechanical properties of 253MA grade stainless steel
Tensile Str (MPa) min
Yield Str 0.2% Proof (MPa) min
Elongation (% in 50mm) min
Rockwell B (HR B) max
Brinell (HB) max