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Specifications
H13 Tool Steel is a versatile chromium-molybdenum hot work steel that is widely used in hot work and cold work tooling applications.
The hot hardness (hot strength) of H13 resists thermal fatigue cracking which occurs as a result of cyclic heating and cooling cycles in
hot work tooling applications. Because of its excellent combination of high toughness and resistance to thermal fatigue cracking
(also known as heat checking) H13 is used for more hot work tooling applications than any other tool steel.
Also available as Electro-Slag-Remelted (ESR) and Vacuum-Arc-Remelted (VAR) products as well.
The remelting processes provide improved chemical homogeneity, refinement of carbide size, and the associated improvements in
mechanical properties and fatigue properties.
Applications:
Inserts, cores, and cavities for die casting dies, die casting shot sleeves, hot forging dies, extrusion dies, and plastic mold cavities and components that require high toughness and excellent polishability.
COMPOSITION
| C | Mn | Si | Cr | Mo | V | C |
| 0.40 | 0.40 | 1.00 | 5.25 | 1.35 | 1.00 | 0.40 |
| Coefficient of Thermal Expansion(47-48 HRC) | |||
| Temperature︒F | in/in︒F×10-6 | Temperature︒C | mm/mm︒C×10-6 |
| 80-200 | 5.8 | 21-93 | 10.4 |
| 80-400 | 6.3 | 21-204 | 11.3 |
| 80-800 | 6.9 | 21-316 | 12.4 |
| 80-1200 | 7.3 | 21-427 | 13.1 |
| 80-1500 | 7.5 | 21-538 | 13.5 |
Specifications:
Tempering:Temper immediately after quenching. The typical tempering range is 1000-1150°F (538-621°C). Hold at the tempering temperature for 1 hour per inch (25.4mm) of thickness, but for 2 hours minimum, then air cool to ambient temperature. Double tempering is required. To maximize toughness and tool performance, a third temper is often used as a stress relief after all finish machining, grinding, and EDM work are completed on the tool.
ANNEALING
Annealing must be performed after hot working and before re-hardening.
Heat at a rate not exceeding 400°F per hour (222°C per hour) to 1575-1625°F (857-885°C), and hold at temperature for 1 hour per inch of maximum thickness; 2 hours minimum. Then cool slowly with the furnace at a rate not exceeding 50°F per hour (28°C per hour) to 1000°F (538°C). Continue cooling to ambient temperature in the furnace or in air. The resultant hardness should be a maximum of235 HBS.
Surface Finish: Black, Rough Machined, Turned or as per given requirements.
Other Applications
| Applications | Austenitizing temp | HRC |
| Severe cold punching, scrap shears | 1,870-1,885°F | 50-52 |
| (1,020-1,030°C) | ||
| Tempering 480°F (250°C) | ||
| Hot shearing | 1,870-1,885°F | |
| (1,020-1,030°C) | 50-52 | |
| Tempering 480°F (250°C) or | ||
| 1,070-1,110°F | 45-50 | |
| (575-600°C) | ||
| Shrink rings (e.g. for cemented carbide dies) | 1,870-1,885°F | 45-50 |
| (1,020-1,030°C) | ||
| Tempering 1,070-1,110°F | ||
| (575–600°C) | ||
| Wear-resisting parts | 1,870-1,885°F | Core |
| 50-52 | ||
| Surface | ||
| ~1000HV1 |
PHYSICAL PROPERTIES
· Density: 0.280 lb/in3 (7750 kg/m3)
· Specific Gravity: 7.75
· Machinability: 65-70% of a 1% carbon steel
| Item | Dimension (mm) | Process | Delivery condition |
Round Bar | DIA1.0 - 30 | Cold-drawing / Centerless grinding | Bright & Anneal |
| DIA20 - 80 | Peeling | Bright & Anneal | |
| DIA 13-180 | Hot Rolled | Black surface & Anneal | |
| DIA 70 - 400 | Hot Rolled | Black surface & Anneal |
