Martensite stainless steel 440C Hot rolled annealed descaled sheared sheet

Designations 

Description

440C is a high-carbon chromium steel designed to provide stainless properties with maximum hardness.

440C stainless steel provides very good wear resistance combined with moderate corrosion resistance in mild environments.

440C is heat treatable to RC 59. This grade is commonly used in cutlery and food processing applications.

Chemistry data ( in weight % )

Delivery state 

Annealed

Applications

Suitable for applications requiring a combination of excellent wear resistance with moderate corrosion resistance.

440C is commonly used in the oil and gas, marine, food and medical industries.

Typical applications are knives, scissors, surgical tools, cutlery, bearings etc.

Physical data

Specific Gravity   7.7 g/cm3

Density    0.28 lb/in.3

Heat treatment

Annealing

For maximum softness, this steel should be heated uniformly to 1550/1600°F (843/871°c).

Soak and cool very slowly in the furnace. Brinell hardness approximately 223.

Intermediate or process annealing treatment-heat uniformly to 1350/1400°F (732/760°c).

Air cool. Brinell hardness about 255.

Hardening

Heat to 1850/1950°F (1010/1066°c); soak; quench in warm oil or cool in air. Do not overheat.

When overheated, full hardness cannot be obtained. See comments under corrosion resistance.

Tempering

Hardness of approximately Rockwell C 60 will be obtained. To remove peak stresses and yet retain

maximum hardness, temper at least one hour at 300/350°F (149/177°c).

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