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Cast Grade: HPNbMA

OVERVIEW: A micro-alloyed 25-35Nb with small additions of reactive and rare earth elements that is especially stable at higher temperatures, and reduces carburization and surface oxidation. Service limit 1150 degrees Celsius (2100 degrees Fahrenheit).

TYPICAL USES: Petrochemical furnaces.

MetalTek Grade: MTEK 25-35MA

Similar Specifications

Cast Grade: HPNbMA

Typical Chemical Composition (% by wt.)

Cr: 23 - 27

Fe: bal

Mn: 1.50

Ni: 33 - 37

Si: 2.00

C Max: 0.35 - 0.55 (Low Carbon version available)

Other: Mo 0.50 max; Nb (Cb) 0.50 - 1.25

Minimum Mechanical Properties

Heat Treatment: As Cast