Alloy Grade UNS: CF8 – Austenitic Stainless Steel

  • Overview

    The CF8 alloy, an austenitic stainless steel, is probably the most widely used alloy of all stainless steel grades. An iron-chromium-nickel alloy, it combines good strength and ductility with excellent corrosion resistance. It contains between 8-11% nickel and a maximum amount of .08% carbon. It has good machining and welding characteristics but should be re-annealed after welding or exposure to temperatures between 800° and 1600° F to restore full corrosion resistance. CF8 alloy is very similar to 304 stainless steel.

  • Typical Uses

    A general purpose corrosion resistant alloy used for flanges, rolls, sleeves, marine fittings, bearings, heat exchangers, pulp & paper equipment, rings, tubes, pump and valve components, sanitary fittings, and chemical and food processing equipment.

  • MetalTek Grade

    MTEK 304

Similar Specifications

Cast UNS: J92600

Wrought UNS: S30400

Wrought Grade: 304

Cast Grade: CF8

Cast ASTM: A351, A743, A744

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.08

Chromium: 18-21

Manganese: 1.5

Iron: n/a

Copper: n/a

Nickel: 8.0-11.0

Lead: n/a

Tin: n/a

Silicon: 2

Zinc: n/a

Minimum Mechanical Properties

Tensile, ksi

0

Tensile, MPa

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Solution Anneal

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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.
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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%.
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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.