|
H-13 High
Toughness Steel
 | H-13 is an air- or oil-hardening tool steel noted for
extreme toughness and good red-hardness. Typical analysis is shown in the chart below: |
| Carbon |
Silicon |
Manganese |
Chromium |
Molybdenum |
Vanadium |
| 0.37% |
1.00% |
0.35% |
5.25% |
1.30% |
1.00% |
| H-13 is used mostly in hot tooling applications,
although it is used in cold work applications where other steels tried have broken during
use. Typical applications include:
 | Aluminum Extrusion Dies
|
| Bending Dies |
| Die Casting Dies |
| Forging Dies |
| Plastic Mold Dies |
| Die Casting Inserts |
| Hot Work Punches |
| Extrusion Press Liners
|
|
| Heat Treatment:
| Forging:
 | Preheat slowly to 1300º F until piece is
thoroughly heated through, then increase heat to 1900ºF - 2050ºF. |
| DO NOT hot work H-13 below 1650ºF. |
| After forging, allow H-13 to cool slowly in
insulating material or in a heated (1450ºF) furnace. |
| Anneal as soon as possible.
|
|
| Annealing:
| Surface protection - Anneal in controlled atmosphere
furnace or pack in an inert material. |
| Slowly heat H-13 to 1500º - 1550º. Hold at
temperature for 1½ hours per inch of maximum diameter or thickness. Cool slowly at a rate
of 20º - 30º per hour to 1200ºF, remove from furnace and allow to air cool. Annealed
hardness is 180 - 240 Brinell. |
| Stress Relieving - rough machine first, then anneal at
1150ºF - 1250ºF. Hold at temperature for approximately 2 hours, cool in furnace to
925ºF, remove and allow to air cool. |
|
| Hardening:
| Pack in inert material or use controlled atmosphere
furnace to control decarburization. |
| Pre-heat slowly to 1250ºF - 1350ºF, and hold to
equalize temperature throughout the piece. |
| Increase heat rapidly to 1800ºF-1900ºF. |
| Hold steel at temperature for one hour per inch of
maximum thickness. Cool in still air or oil treat. |
| Temper immediately after the piece has cooled to
150ºF. |
|
|
| Tempering:
| Temper immediately when piece reaches 150ºF or when
comfortably hand-held. |
| Temper at least 50ºF higher than the expected maximum
operating temperature of the tool. |
|
| Physical & Mechanical
Properties (approx.):
| Density, lb per cu in: .28 |
| Specific gravity: 7.77 |
| Critical points:
| Heating (Ac) 100º/hr - begins 1580ºF; ends 1640ºF |
| Cooling (Ar) 50º/hr - begins 1570ºF; ends 1510ºF |
|
|
| Mean Thermal
Coefficient of Expansion: |
Range ºF |
Coefficient,
in./in./ºF |
Range, ºF |
Coefficient, in./in./ºF |
80S200 |
6.1 x 10 6 |
80S1450 |
7.5 x 10 6 |
80S400 |
6.4 |
500S1200 |
7.8 |
80S800 |
6.8 |
500S1450 |
8.0 |
80S1000 |
6.9 |
800S1200 |
8.1 |
80S1200 |
7.3 |
800S1450 |
8.2 |
| Red Hardness |
One inch dia. x 7/8" long samples,
quenched in oil from 1850ºF, tempered 2 hours, held at testing temperature for 30 minutes
prior to test.
Tempering Temperature, ºF |
Rockwell C |
Testing Temperature, ºF |
Brinell Hardness |
1050 |
53 |
800 |
496 |
1050 |
53 |
900 |
475 |
1050 |
58.5 |
1000 |
419 |
1100 |
53 |
1100 |
350 |
1200 |
51 |
1200 |
139 |
1300 |
38 |
1300 |
69 |
For More Information please call or fax us at
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|
