Alloy Grade UNS: CA40 – “400 series” Alloy

  • Overview

    CA40 is a high-strength, corrosion-resistant stainless steel alloy belonging to the "400 series." Similar to CA15/MTEK 410, it is a high-carbon, straight chrome alloy, but with the potential for even greater hardness through heat treatment. This enhanced hardness contributes to its excellent abrasion and wear resistance, making it well-suited for applications involving friction and contact stress. CA40 offers a valuable combination of strength, hardness, and corrosion resistance, making it a suitable choice for demanding environments where components must withstand both mechanical wear and corrosive elements.

  • Typical Uses

    Aerospace, bearings, bushings, chemical and food processing equipment, conveyor rollers, cutlery, impellers, medical devices, pump and valve components, turbine engine parts. 

  • MetalTek Grade

    MTEK 420

  • Poured At:

    Carondelet Division, Sandusky International Division, Wisconsin Centrifugal Division, Wisconsin Investcast Division

Similar Specifications

Cast UNS: J91153

Wrought UNS: S42000

Wrought Grade: 420

Cast Grade: CA40

Cast ASTM: A743

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.20-0.40

Chromium: 11.5-14.0

Manganese: 1

Iron: n/a

Copper: n/a

Nickel: 1.00 MAX

Lead: n/a

Tin: n/a

Silicon: 1.5

Zinc: n/a

Minimum Mechanical Properties

Brinell Typical:

0

Tensile, ksi

0

Tensile, MPa

0

Calculated PREn (Minimum)

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Anneal

NOTES: Brinell value is MAX.

Frequently Asked Questions

Martensitic steel is a magnetic stainless steel that is heat-treatable and used for applications requiring high hardness.

Martensitic steel is used in chemical and food processing equipment, impellers, turbine engine components, and wear-resistant parts where hardness and strength are critical.

Austenitic steel is non-magnetic, corrosion-resistant, and ductile. Martensitic steel is magnetic, harder, heat-treatable, and more wear-resistant but less corrosion-resistant.

Martensitic steel offers high hardness, wear resistance, and strength after heat treatment, ideal for demanding mechanical applications.

Yes, martensitic steel can be heat treated through quenching and tempering to increase hardness and mechanical performance.

Yes, martensitic stainless steel is magnetic due to its body-centered tetragonal (BCT) structure after quenching.

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