Vidar Superior Steel

Vidar Superior Steel

Steel name: Vidar Superior
Diagram No.: 2749
Mat.No. (Wr.Nr.) designation: 1.2340
DIN designation: X36CrMoV5-1
AISI/SAE designation: H11
AFNOR designation: Z38CDV5
Chemical composition in weight %: 0.36% C, 0.30% Si, 0.30% Mn, 5.00% Cr, 1.30% Mo, 0.50% V
Steel group: Hot work tool steels
Properties: Uddeholm Vidar Superior is a chromiummolybdenum- vanadium alloyed hot work tool steel.
Applications: Tools for hot forging. Moulds for plastics.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: Preheating temperature: 600–900°C (1112– 1652°F). Minimum two preheating steps at 600–650°C (1112–1202°F) and 820–850°C (1508–1562°F). When three preheats are used the second is carried out at 820°C (1508°F) and the third at 900°C (1652°F). Austenitizing temperature: 980–1000°C (1796– 1832°F). Soaking time: 30–45 minutes. Soaking time = time at austenitizing temperature after the tool is fully heated through. Protect the tool against decarburization and oxidation during austenitizing.
Quenching media: High speed gas/circulating atmosphere. Vacuum (high speed gas with sufficient positive pressure). An interrupted quench at 350–450°C (662–842°F) is recommended where distortion control and quench cracking are a concern. Martempering bath (salt or fluidized bed) at 500–550°C (932–1022°F) or 180–220°C (356–428°F). Warm oil, approx. 80°C (176°F).
Note 1: Temper the tool as soon as its temperature reaches 50–70°C (122–158°F).
Note 2: In order to obtain the optimum properties for the tool, the cooling rate should be fast, but not at a level that gives excessive distortion or cracks.
Tempering: Above 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 temperature. Holding time at temperature is minimum 2 hours. Tempering in the temperature range 450–550°C (840–1020°F) for the intended final hardness will result in a lower toughness.
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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