Ferritic steels cannot be hardened or strengthened by heat treatment, but have good resistance to stress-corrosion cracking. They can be cold worked and softened by annealing. While not as strong or corrosion resistant as austenitic grades, the ferritic grades generally have better engineering properties. Though generally very weldable, some ferritic steel grades can be prone to sensitization of the weld heat-affected zone and weld metal hot cracking. Weldability limitations, therefore, restrict the use of these steels to thinner gauges.

    Steels with a chromium content of more than 10,5% and less than 0,15% carbon. Unlike martensitic steels, these grades cannot be stiffened by quench hardening but only through cold working (e.g. Cold drawing). Ferritic steels are ferromagnetic.

    Since the inception, we are trading Stainless Steel 440c to our clients from different verticals. We supply these steel with wide gamut varying in length and dimensions. We supply our product with the following

    • 440C is a high carbon chromium stainless steel providing stainless steel properties with optimum hardness after heat treatment
    • 440C can achieve a hardness of up to 60 Rockwell HRc
    • 440C stainless resists corrosion in normal domestic environments and very mild industrial environments, with optimum corrosion resistance of 440C achieved with a temper below about 400°C. For 440C to achieve best corrosion resistance, surfaces must be free of scale, lubricants, foreign particles, and coatings applied for drawing and heading
    • With its high carbon content 440C annealed stainless machines similar to a high speed steel annealed grade.

    Typical Analysis :

    C. Mn. P. S. Si. Cr. Mo.
    -0.95 1.00% 0.04% 0.03% 1.00% -16 0.75%
    1.20% max. max. min. max. 18.00% max.

    Annealing

    To achieve full annealing of 440B heat uniformly to 840 to 875°C. Soak and cool very slowly in the furnace.

    Hardening

    To heat treat 440B heat to 1010 to 1070°C, fully soak and quench in warm oil or cool in air. Be careful not to overheat 440C or full hardness will not be obtained.

    Mechanical Properties at Room Temperature
    (440C hardened at 1040°C, oil quenched and tempered at 300°C)

    Tensile (UTS) 1965 N/mm²
    0.2% Yield Strength 1896 N/mm²
    Elongation (50.8mm) 2% min
    Hardness 59HRc
    Reduction of Area 10

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