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440C Stainless Steel Plate - UNS S4404


Type 440C is a martensitic stainless steel with high carbon and chromium content.  After heat treatment, it is capable of attaining the highest strength, hardness and wear resistance of all stainless alloys.  Compared to austenitic grades, 440C has moderate corrosion resistance, comperable to 304.  This grade of stainless steel plate can be hardened through heat treatment, but machining is preferable in the annealed condition and becomes extrememly difficult once hardened.

Highest resistance can be achieved through hardening and polishing, and the properties of 440C steel make it ideal for knife blades and cutting instruments like surgical blades.  This grade, once hardened, hold a sharp edge and resists corrosion, and can be polished to a near mirror finish.  Its toughness and ability to resist wear makes 440C stainless steel a good choice for tools like chisels and ball bearings.

Standard Inventory Specifications

  • UNS S44004
  • AMS 5630 Chem Only

Common Applications of 440C Stainless Steel Plate include:

  • Cutting Instruments
  • Knife Blades
  • Surgical Instruments
  • Chisels
  • Ball Bearings and Valves

Inventory Size Range

  • Plate : 0.1875" - 2.500"

Please contact us for more details.

The technical data provided is for information only and not for design purposes. It is not warranted or guaranteed.

Chemical Composition of 440C Stainless Steel

     

Carbon

0.95 min

1.20 max

Manganese

 

1.00 max

Silicon

 

1.00 max

Phosphorus

 

0.040 max

Sulfur

 

0.030 mx

Chromium

16.00 min

18.00 max<

Molybendum

 

0.75

Physical Properties of 440C Stainless Steel

   

Density kg/mᶟ

7650

Thermal Conductivity at 212°F (100°C)

24.2

Thermal Conductivity at 932°F (500°C)

-

Electrical Resistivity

600

Elastic Modulus (Gpa)

200

Mechanical Properties of 440C Stainless Steel

Annealed

 

Yield Strength 0.2% Proof (Mpa)

448

Tensile Strength (Mpa)

75

Elongation (% in 50mm)

14

Hardness (HB)

269 max


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