Vanadis 4 Extra SuperClean Steel

Vanadis 4 Extra SuperClean Steel

Steel name: Vanadis 4 Extra SuperClean
Diagram No.: 2748
Chemical composition in weight %: 1.40% C, 0.40% Si, 0.40% Mn, 4.70% Cr, 3.50% Mo, 3.70% V
Steel group: Cold work tool steels
Properties: Uddeholm Vanadis 4 Extra SuperClean is a chromium-molybdenum-vanadium alloyed steel.
Applications: Uddeholm Vanadis 4 Extra SuperClean is especially suitable for applications where adhesive wear and/or chipping are the dominating failure mechanisms.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: Pre-heating temperature: First pre-heating at 600–650°C (1110–1200°F) and second at 850– 900°C (1560–1650°F). Austenitizing temperature: 940–1180°C (1725– 2160°F), normally 1020°C (1870°F). • For large sections, i.e. >70 mm (2.75") use 1060°C (1940°F). • For the very best wear resistance use 1100–1180°C (2010–2160°F). Soaking time: 30 min. for hardening temperatures up to 1100°C (2010°F), 15 min. for temperatures higher than 1100°C (2010°F). Note: Soaking time = time at hardening temperature after the tool is fully heated through. A holding time of less than recommended time will result in loss of hardness. Protect the tool against decarburization and oxidation during hardening.
Quenching media: Vacuum (high speed gas at sufficient overpressure, minimum 2 bar). Martempering bath or fluidized bed at 200–550°C (390–1020°F). Forced air/gas Note: Temper the tool as soon as its temperature reaches 50–70°C (120–160°F). In order to obtain the optimum properties for the tool, the cooling rate should be as fast as possible with regards to acceptable distortion. A slow quench rate will result in loss of hardness compared with the given tempering curves. Martempering should be followed by forced air cooling if wall thickness is exceeding 50 mm (2").
Tempering: Choose the tempering temperature according to the hardness required by reference to the tempering graphs. Temper at least twice with intermediate cooling to room temperature. For highest dimensional stability and ductility, a minimum temperature of 540°C (1000°F) and three tempers is strongly recommended. Tempering at a lower temperature than 540°C (1000°F) may increase the hardness and compressive strength to some extent but also impair cracking resistance and dimensional stability. However, if lowering the tempering temperature, do not temper below 520°C (970°F). When tempering twice the minimum holding time at temperature is 2 hours. When tempering three times the minimum holding time is 1 hour.
Diagram note: The tempering curves, in the two graphs, 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.