S400 Steel

Steel name: S400
Diagram No.: 2169
DIN designation: HS2-9-2
Mat.No. (Wr.Nr.) designation: ~1.3348
AISI/SAE designation: M7
UNI designation: HS2-9-2
JIS designation: SKH58
AFNOR designation: Z100DCWV09-04-02-02
UNS designation: T11307
Chemical composition in weight %: 1.02% C, 0.40% Si, 0.30% Mn, 3.80% Cr, 8.60% Mo, 1.90% V, 1.80% W
Steel group: High speed tool steels
Applications: No data
Comment: No data
Reference: Not shown in this demo version.

Heat Treatment
Hardening: 1170 to 1210C (2138 to 2210F) Oil, salt bath (500 to 550C (932 to 1022F), vacuum.
Tempering: Slow heating to tempering temperature immediately after hardening/time in furnace: 1 hour for every 20 mm of work piece thickness, but not less than 2 hours/ air cooling (minimum holding time: 1 hour). 1st tempering and 2nd tempering to desired working hard ness. Average obtainable hardness values are shown in the tempering chart. 3rd tempering for stress relieving, 30 - 50C (86-122F) be low hig hest tempering temperature.
Note: No data

Tempering Diagram

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