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440B Information & Composition

Ordering Information:

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Information Pages:

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A stainless steel used by Randal Knives. A higher amount of carbon results in a better blade steel than 440A.

440C is shown in the table above for comparison purposes.

Data Sheets:

Bohler N685 (440B) Data Sheet
Bohler N695 (440C) Data Sheet
Carpenter 440B Data Sheet
Carpenter 440C Data Sheet
Crucible 440C Data Sheet
Latrobe 440C Data Sheet

Heat Treating Information:
Preheat: Heat to 1400° and equalize.

Austenitize: Ramp to 1850°-1950°F and hold at temperature for 30 minutes. Oil, plate or air quench to below 150°F.

Cryogenic Treating: Cyro may be performed after quenching to 125 °F to reduce retained austenite. After cyro allow blade to warm to room temperature.

Temper: Temper immediately after quenching or cyro. Hold at temperature for two hours minimum and allow to cool to room temperature. Use the table below to select the rockwell hardness.

Heat Treating Services:
Pacific Metallurgical
Paul Bos Heat Treating
Peters Heat Treating

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Blade Steel Information & Composition

Phone: 425-868-5880 Ordering Information
Fax: 425-898-7715

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