Alloy Grade UNS: CA15 – “400 series” Alloy

  • Overview

    CA15 is a "400 series" material that is a hardenable stainless alloy with enough chromium present to make it resistant to rusting and mildly corrosive environments. The 400 series has an 11% chromium increase compared to the 300 series and a 1% increase in manganese. A wide range of hardness is obtainable through various tempering treatments. It’s readily machinable and weldable but should be annealed or stress-relieved since this alloy is air-hardenable. The 400 series can be prone to rust, but that is easily cured via heat treatment. The trade-off compared to the 300 series is the added strength in the 400 series. This metal alloy is also known as MTEK 410.

  • Typical Uses

    Bearings, bushings, chemical and food processing equipment, conveyor rollers, cutlery, impellers, medical devices, pump and valve components, turbine engine parts, shaft sleeves, liners, and aircraft parts.

  • MetalTek Designation

    MTEK 410

  • Poured At:

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

Similar Specifications

Cast UNS: J91150

Wrought UNS: S41000

Wrought Grade: 410

Cast Grade: CA15

Cast ASTM: A743, A487, A217

Military/AMS: AMS 5351

* AMS specifying sand casting.

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.15

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

Tensile, ksi

0

Tensile, MPa

0

Calculated PREn (Minimum)

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Anneal

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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