Alloy Grade UNS: HH TYPE II –  Scaling Resistance at High Temperature

  • 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

Tensile, ksi

0

Tensile, MPa

0

Elongation

0%

Heat Treatment: Not Heat Treated