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PACIFIC O6 has the highest machinability rating of any standard grade of tool steel. Free graphite in the microstructure gives unique machining characteristics; it also allows lubricant retention which gives non-seizing properties. O6 can usually be substituted for O1 in any application where machinability is a prime consideration.


TYPICAL APPLICATIONS

Bushings

Forming Dies

Small Tools

Cams

Gages

Spinning Tools

Deep Draw Dies

Machine Ways

Trim Dies

Draw Punches

Sizing Dies

Wear Plates

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CHEMICAL COMPOSITION: Heat Analysis - ranges and limits %
C Mn Si Mo
1.45 .80 1.00 .25

THERMAL PROCESSING: Guidelines - Use Good Judgment

FORGING:
Heat to 1800/1950°F, do not forge below 1500°F.
ANNEALING:
Heat to 1410/1450°F and hold 1 to 4 hours depending on part size, cool at a maximum rate of 20°F per hour to 1000°F (cooling rate below 1000°F is not critical). Typical annealed hardness is 183/217 HB.
STRESS RELIEVING:
Heat to 1200/1250°F for 1 hour minimum at temperature and cool in air.
HARDENING:
Preheat complex and/or large tools to 1200°F. Heat slowly to austenitize at 1410/1450°F for 10 to 30 minutes. Quench in oil to an expected hardness of 63/65 HRC.
TEMPERING (Drawing):
Temper at 350/600°F for an hour at temperature to approximate hardness of 63 to 58 HRC.

Tempering
Temperature °F

Approximate
Hardness, HRC

  

Tempering
Temperature °F

Approximate
Hardness, HRC

300

61/63

  

800

48/52

400

60/62

  

900

45/49

500

58/60

  

1000

38/42

600

56/59

  

1100

32/38

700

52/54

  

1200

22/30

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Shapes and Conditions Available:
Annealed Rounds through 8" Diameter
SE® Flats & Squares from 1/2" through 3/4" Thickness

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