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Cast Grade: HK

OVERVIEW: High temperature material with increased strength for more highly stressed applications.  Good resistance to oxidizing or reducing process flow. Service Limit 1025 degrees Celsius (1875 degrees Fahrenheit).

TYPICAL USES: Calcining tubes, cement kiln parts, pier caps with temperature fixtures and hardware, radiant tubes, retorts.

MetalTek Grade: MTEK 25-20

Similar Specifications

Cast UNS: J94224

Cast Grade: HK

Cast ASTM: A297, HK (CENT, INVEST, SAND)

Typical Chemical Composition (% by wt.)

Cr: 24.0 - 28.0

Fe: Bal

Mn: 2.00 max

Ni: 18.0 - 22.0

Si: 2.00 max

C Max: 0.20 - 0.60

Minimum Mechanical Properties

Brinell Typical: 170

Tensile, ksi: 65

Tensile, MPa: 450

Yield, ksi: 35

Yield, MPa: 240

Elongation %: 10

Heat Treatment: As Cast

** Carbon: HK30:0.25-0.35;HK40:0.35-0.45