PACIFIC H13 is deep hardening with very high toughness and excellent resistance to heat checking. Although primarily used for hot work applications, it can be used in cold work applications where extra toughness is required (but sacrifice in wear resistance can be tolerated). H13 exhibits low distortion in heat treating and has good machinability.
Heat Analysis - ranges and limits %
Preheat at 1300/1350°F prior to raising to forging temperature of 1950/2100°F. Do not forge below 1650°F; cool slowly.
Heat slowly to 1550/1650°F and hold at temperature 1 to 4 hours depending on part size. Cool at a maximum rate of 50°F per hour to 1000°F (cooling rate below 1000°F is not critical). Typical annealed hardness is 192/229 HB.
Heat to 1200/1250°F and hold at temperature 1 hour minimum; cool in air.
Preheat at 1400/1500°F before austenitizing at 1825/1900°F for 15 to 40 minutes; cool in air to harden. Typical as quenched hardness is 51/54 HRC.
Temper immediately, typically 1 hour minimum at 1000/1200°F to an expected hardness of 53/38 HRC. Double tempering is suggested with cooling to room temperature after the first temper.
Tempering Temperature °F
Approximate Hardness, HRC
Shapes and Conditions Available
Annealed Rounds through 5" Diameter
SE® Flats & Squares from 3/4" through 2" Thickness