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W403 VMR Steel
Steel name: W403 VMR
Diagram No.: 2281
Mat.No. (Wr.Nr.) designation: ~1.2367
EN designation: ~X38CrMoV5-3
AFNOR designation: ~Z38CDV5-3
NADCA designation: Grade C
Chemical composition in weight %: 0.38% C, 0.20% Si, 0.25% Mn, 5.00% Cr, 2.80% Mo, 0.65% V
Steel group: Hot work tool steels
Properties: Good macro- and microstructure with lowest levels of segregation. Lowest gas contents. Lowest levels of unwanted trace elements. Excellent homogeneity and isotropy. Highest degree of cleanliness. Good toughness. Best polishability. Best heat checking resistance (resistance to thermal fatigue). Very high thermal stability.
Applications: Heavy duty hot work tools and dies, mainly for light alloy processing: mandrels, dies, and containers for metal tube and rod extrusion; hot extrusion equipment; tools and dies for the manufacture of hollow bodies, screws, rivets, nuts and bolts. Die casting equipment, forming dies, die inserts, hot shear blades, and plastic moulding dies.
Reference: Not shown in this demo version.
Heat Treatment
Hardening: 1020 to 1030 °C (1870 to 1885 °F) Oil, salt bath (500 – 550 °C [930 – 1020 °F]), air or vacuum with gas quenching. Holding time after temperature equalization: 15 to 30 minutes. Obtainable hardness: 52 – 54 HRc in oil or salt bath hardening, 50 – 53 HRc in air or vacuum hardening. In order to prevent coarsening of the grain, hardening must be carried out at the recommended temperature of 1020 – 1030 °C (1870 – 1885 °F).
Tempering: Slow heating to tempering temperature immediately after hardening/time in furnace 1 hour for each 20 mm (0.79 inch) of workpiece thickness but at least 2 hours/cooling in air. It is recommended to temper at least twice. A third tempering cycle for the purpose of stress relieving may be advantageous. 1st tempering approx. 30 °C (85 °F) above maximum secondary hardness. 2nd tempering to desired working hardness. The tempering chart shows average tempered hardness values. 3rd for stress relieving at a temperature 30 to 50 °C (85 – 120 °F) below highest tempering temperature.
Diagram note: Hardening temperature: 1030 °C (1886 °F). Specimen size: square 20 mm (0.79 inch).
Tempering Diagram
Price: 20.00 US $
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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.