TENASTEEL Steel

TENASTEEL Steel

Steel name: TENASTEEL
Diagram No.: 2019
Chemical composition in weight %: 1.00% C, 0.35% Mn, max. 0.005% S, 7.50% Cr, 2.60% Mo, 0.30% V, +Nb
Steel group: Cold work tool steels
Properties: TENASTEEL is specially designed to replace D2/ X160 CrMoV12/W1.2379 type steels widely used by tool makers but suffering from an excessive brittleness.
Applications: No data
Reference: Not shown in this demo version.

Heat Treatment
Hardening: Slow heating up to 750°C (1392°F) and homogenization. Then, slow heating up to 1030/1050°C (1886/1922°F), holding time 30 min per 25 mm of thickness. Cooling after austenitization shall be done preferably under overpressed gas. When it is not possible it can be done in salt bath or better in fluidized bed within temperature range 250 / 350°C (482 / 662°F) Oil quenching can be used only for very simple shapes when other processes do not provide a sufficient cooling speed (see TTT and CCT diagrams). Tempering shall be done immediately when temperature reaches 40 to 60°C (104/140°F) except in case of cryogenic treatment (see "Cryogenic treatments").
Tempering: Depending on the final application, required hardness shall be obtained by the adjustment of tempering temperature with the help of following softening curves. After the first tempering, a second one shall be done identical or at a slightly lower temperature to obtain a fully tempered microstructure necessary to ensure a complete dimensional stability of the heat treated piece. As shown on the graph, an austenitization at 1050°C (1922°F) enables a hardness level higher than 58 HRC even with tempering temperature higher than 570°C (1058°F).
Diagram note: Ac1=845 C, Ac3=880 C, Ms=200 C

Tempering Diagram

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Other Steel Data links
Carbides in Steel
CCT and TTT Diagrams of Steels
CCT and TTT Diagram Calculating Service
Hardenability Diagrams of Steels
Hardenability Calculating Service
Macro Defects in Steel
Metal Etchants
Non-Metallic Inclusions in Steel
Semiconductor Etchants

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