SLD, SGT, YXR7, YXM1 Steels

Steel name: SLD, SGT, YXR7, YXM1
Diagram No.: 1459
Mat.No. (Wr.Nr.) designation: 1.2379, - , - , 1.3343
AISI/SAE designation: D2, O1, - , M2
JIS designation: SKD11, SKS3, - , SKH51
Chemical composition in weight %: SLD steel: 1.5% C, 0.3% Si, 0.4% Mn, 12.0% Cr, 0.9% Mo, 0.3% V. SGT steel: 1.0% C, 0.3% Si, 1.0% Mn, 0.7% Cr. YXR7 steel: 0.8% C, 0.8% Si, 0.3% Mn, 4.7% Cr, 1.3% W, 5.5% Mo, 1.3% V. YXM1 steel: 0.9% C, 0.3% Si, 0.4% Mn, 4.2% Cr, 6.5% W, 5.0% Mo, 2.0% V.
Steel group: Tool steels, high speed tool steels
Applications: Cold work tool steel applications.
Comment: The maximum diameter of a round bar stock that obtains 60 HRC hardness at its center by quenching.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: SLD steel: 1000-1050 C air cool. SGT steel: 800-850 C oil quench. YXR7 steel: 1160-1180, 1120-1160 oil quench. YXM1 steel: 1200-1240, 1160-1200 oil quench.
Tempering: SLD steel: 480-530 or 150-200 C air cool. SGT steel: 150-200 C air cool. YXR7 steel: 540-580 air cool. YXM1 steel: 550-570 air cool.

Hardenability Diagram


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