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Unimax Steel
Steel name: Unimax
Diagram No.: 2767
Chemical composition in weight %: 0.50% C, 0.20% Si, 0.50% Mn, 5.00% Cr, 2.30% Mo, 0.50% V
Steel group: Plastic mould steels
Properties: Uddeholm Unimax is a ESR remelted chromium-molybdenum-vanadium alloyed tool steel.
Applications: Uddeholm Unimax is suitable for long run production moulds, moulds for reinforced plastics and compression moulding. Uddeholm Unimax is a problem solver in severe cold work tooling applications such as heavy duty blanking, cold forging and thread rolling, where high chipping resistance is required. Engineering and hot work applications requiring high hardness and toughness are also an option.
Reference: Not shown in this demo version.
Heat Treatment
Hardening: Preheating temperature: 600–650°C (1110– 1200°F) and 850–900°C (1560–1650°F). Austenitizing temperature: 1000–1025°C (1830–1875°F), normally 1025°C (1875°F). Holding time: 30 minutes.
Quenching media: High speed gas/circulating atmosphere. Vacuum furnace (high speed gas with sufficient overpressure). Martempering bath, salt bath or fluidized bed at 500–550°C (930–1020°F). Martempering bath at 200–350°C (390– 660°F).
Tempering: Choose the tempering temperature according to the hardness required by reference to the tempering graph below. Temper at least twice with intermittent cooling to room temperature. High temperature tempering >525°C (980°F) is recommended whenever possible.
Diagram note: The 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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Disclaimer: The material data is a central depository of information based on global actual tests and calculated software data that is available to the public for a fee. The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.