*Always consult your Heat Treater*
      *Information Provided is General*

S-5, available upon request, is a combination of various alloys selected to obtain optimum toughness and shock resistance for chisels, punches and similar applications.  S-5 is primarily an oil-hardening grade although it can be water quenched. However, oil quenching is recommended for intricate parts, especially where the design includes sharp corners or major changes in section size.

S-5 is an oil-hardening grade but it can be water quenched when the part design is not intricate.  A temperature in the range of 1600-1700° F is recommended for oil hardening and 1550-1600° F when quenching in water.  The holding time should be adequate to insure thorough heating of the part. Best results are obtained by hardening in atmosphere controlled furnaces, in neutral salt baths or in a vacuum furnaces with an integral oil quench. The parts should be tempered immediately on reaching a temperature of 150° F.

S-5 should be tempered immediately after the quench is completed.  Allow the parts to cool to 125-150° F in the quench, then place in the tempering furnace.  For most applications the tempering temp. is within 300-500° F, depending upon the desired hardness. A minimum holding time at temperature is 1 hour per inch of thickness.

Hardening happens between 1550-1700° F.

S-5 is an oversized material, available upon request.


  •  Up to 1″ + .007 up to .0181

  •  1” up to 6″ + .015 up to .040

  •  6” and up + .0625 up to .250

 Hardening Temp.:    1550 thru 1700° F

 Quench Medium:    Oil

 Tempering Range:    300 thru 1000° F

 Typical Hardness Level:    50 to 60 R/C

 Preheat Forging Temp.:    1450 thru 1500° F

 Forging Temp:    1900 thru 1950° F

 Anneal Temp.:    1550° F

 Anneal Cooling Method: Furnace cool at 100° F per hr. max. to 1000° F  or less, then air cool or furnace cool.

 Anneal Hardness:    229 BHN

 S-5 Material 

 Color Code:    SILVER 

 Round Dimensions

  • 1 ¾” up to 6″

  • Non-standard sizes, quoted upon request

 S-5 Typical Analysis:













 · Slight variations from typical analysis shown may occur in order  to maintain the desired graphitizing potential.