Formvar Steel

Formvar Steel

Steel name: Formvar
Diagram No.: 2193
Chemical composition in weight %: 0.35% C, 0.20% Si, 0.50% Mn, 5.00% Cr, 2.30% Mo, 0.60% V
Steel group: Hot work tool steels
Properties: No data
Applications: No data
Reference: Not shown in this demo version.

Heat Treatment
Hardening: Preheating temperature: 600–900°C (1110– 1650°F). Normally a minimum of two preheats, the first in the 600–650°C (1110–1200°F) range, and the second in the 820–850°C (1510–1560°F) range. When three preheats are used the second is carried out at 820°C (1510°F) and the third at 900°C (1650°F). Austenitizing temperature: 1000–1030°C (1830–1890°F). Quenching media: High speed gas/circulating atmosphere. Vacuum (high speed gas with sufficient positive pressure). An interrupted quench at 320–450°C (610–840°F) is recommended where distortion control and quench cracking are a concern. Martempering bath, salt bath or fluidized bed at 450–550°C (840–1020°F). Martempering bath, salt bath or fluidized bed at 180–200°C (360–390°F). Warm oil, approx. 80°C (180°F).
Tempering: Choose the tempering temperature according to the hardness required by reference to the tempering graph below. Temper minimum twice for forging and extrusion tools with intermediate cooling to room temperature. Holding time at temperature minimum 2 hours.
Diagram note: Bellow tempering curves are obtained after heat treatment of samples with a size of 15 x 15 x 40 mm, cooling in forced air. Lower hardness can be expected after heat treatment of tools and dies due to factors like actual tool size and heat treatment parameters.

Tempering Diagram

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