Overview
Sensitive to composition balance, containing enough chromium for scaling resistance at high temperature. Service Limit 980 degrees Celsius (1800 degrees Fahrenheit).
Typical Uses
Convection furnace components, grate bars, rabble arms, radiant tubes, refractory support hardware.
MetalTek Grade
MTEK 25-12 TYPE II
Similar Specifications
Cast UNS: J93303
Cast Grade: HH TYPE II
Cast ASTM: A447
Typical Chemical Composition (% by wt.)
Aluminum: n/a
Carbon: 0.20-0.45
Chromium: 23-28
Manganese: 2.5
Iron: n/a
Copper: n/a
Nickel: 10.0-14.0
Lead: n/a
Tin: n/a
Silicon: 1.75
Zinc: n/a
Other: N 0.20 MAX
Minimum Mechanical Properties
Heat Treatment: Not Heat Treated