A-10 Graph-Air® Annealed
PACIFIC A10 contains graphite particles distributed throughout the microstructure which gives it excellent machinability and good anti-seizing characteristics. Because of hardening from low temperature (1450/1500°F), its size change and distortion characteristics are both very low. A10 is perhaps the most stable of all tool steels through heat treatment.
Chemical Composition
Heat Analysis - ranges and limits %
C
1.35
Mn
1.80
Si
1.25
Mo
1.50
Ni
1.80
Forging:
Preheat at 1200/1250°F before raising to 1800/1925°F forging temperature. Do not forge below 1600°F.
Annealing:
Heat slowly and uniformly to 1410/1460°F and soak before cooling at a maximum rate of 15°F per hour to 950°F (cooling rate below 950°F is not critical). Typical annealed hardness is 235/269 HB.
Stress Relieving:
Heat to 1200/1250°F and hold 1 hour minimum at temperature; cool in air.
Hardening:
Preheat at 1200/1250°F before raising to an austenitizing temperature of 1450/1500°F; hold at temperature 30 to 60 minutes. Cool in air (to 80/90°F for maximum hardness); typical as quenched hardness is 62/64 HRC.
Temperting (Drawing):
Temper immediately at 350/800°F to an approximate hardness range of 62 to 55 HRC. Double tempering is suggested with cooling to room temperature between tempers.
Tempering Temperature °F
Approximate Hardness, HRC
300
61
400
60
500
59
600
58
700
57
800
55
900
53
1000
48
1100
41
1200
46
Shapes and Conditions Available
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Annealed Rounds through 6" Diameter
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SE® Flats & Squares from 1/2" through 3" Thickness