Alloy Grade UNS: HC – Resists Oxidation

  • Overview

    HC alloy has few mechanical properties. It is restricted to low-stress applications. Also known as MTEK 29-4, this alloy resists oxidation and high sulfur flue gas. The service Limit is 1200 degrees Fahrenheit (650 degrees Celsius). It contains a maximum of 4% Nickel and up to 30% chromium. The added chromium boosts the strength and corrosion resistance of the steel.

  • Typical Uses

    Flue gas, furnace fixtures, gas dampers, recuperator tubes, salt pots, support skids, tuyeres.

  • MetalTek Grade

    MTEK 29-4

Similar Specifications

Cast UNS: J92605

Cast Grade: HC

Cast ASTM: A297

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.5

Chromium: 26-30

Manganese: 1

Iron: n/a

Copper: n/a

Nickel: 4 MAX

Lead: n/a

Tin: n/a

Silicon: 2

Zinc: n/a

Minimum Mechanical Properties

Tensile, ksi

0

Tensile, MPa

0

Heat Treatment: Not Heat Treated

Explore Other Alloys

Gears

Non-Ferrous

Non-ferrous alloys are, literally, materials that are not iron-based. While others may provide non-ferrous materials of other materials, the MetalTek family of non-ferrous alloys are copper-based. In general, these materials deliver high strength, and excellent wear and corrosion resistance. They are often found in marine applications and also bushing, bearing, and gear environments.
Stainless Steel Parts

Stainless Steel

Stainless steels owe their ability to resist corrosion primarily to the presence of a passive film on their surface. Chromium is chiefly responsible for formation of the passive film. Iron ceases to rust at approximately 12% chromium content and resistance to oxidizing corrosives increases rapidly with chromium content up to approximately 20%.
Petrochemical Fittings

Specialty Alloys

Specialty Alloys comprise a broad group of materials that deliver properties for more demanding applications, use more exotic or expensive materials, or require special processes to manufacture. Where standard materials may not offer desired performance, specialty alloys (including those that are modified further) may be a sensible selection.