H13 is a chromium-molybdenum-vanadium hot-work tool steel used for molds, dies, and tooling exposed to elevated temperatures and repeated thermal cycles. Its combination of hot strength, toughness, wear resistance, and hardenability makes it a common choice for aluminum and zinc die-casting dies, hot-forging tools, and extrusion tooling. Commonly associated grades include AISI H13, DIN 1.2344, JIS SKD61, and China’s 4Cr5MoSiV1, but these designations should be treated as comparable rather than automatically identical. Buyers should confirm the governing standard, chemical composition, heat-treatment condition, dimensions, and inspection requirements before ordering.
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This guide is intended for procurement teams, toolmakers, mold designers, and manufacturers comparing hot-work tool steels. It explains the material’s main characteristics, common applications, and grade-designation relationships in practical terms. It is a starting point for material selection, not a substitute for a drawing review or project-specific engineering assessment.
H13 is an air-hardening hot-work tool steel alloyed principally with chromium, molybdenum, and vanadium. These alloying elements contribute to hardenability, strength at elevated temperatures, and resistance to wear and thermal fatigue. Actual properties depend on the steelmaking route, product form, heat treatment, section size, and the applicable material specification.
As a general reference, H13 specifications commonly place carbon at approximately 0.32–0.45%, chromium at 4.75–5.50%, molybdenum at 1.10–1.75%, and vanadium at 0.80–1.20% by weight. These are representative ranges rather than a guarantee for every standard or supply condition. Always compare the material test certificate with the precise specification stated in the purchase order.
| Element | Common reference range by weight | Role in the steel |
|---|---|---|
| Carbon | 0.32–0.45% | Contributes to hardness and strength after heat treatment. |
| Chromium | 4.75–5.50% | Supports hardenability and high-temperature performance. |
| Molybdenum | 1.10–1.75% | Contributes to hot strength and tempering response. |
| Vanadium | 0.80–1.20% | Supports wear resistance and resistance to softening. |
Ranges in this table are useful for orientation only; they do not replace the requirements of a named standard. Other elements, including silicon and manganese, are also controlled, and their limits can vary. When interchangeability matters, request the full chemistry requirements rather than relying on the grade name alone.
H13 is selected when tooling must retain useful strength while operating hot and undergoing repeated heating and cooling. Its balance of toughness and wear resistance can help tools withstand mechanical loading, while its hot-work characteristics make it relevant to processes such as die casting and forging. These benefits are not automatic: tool life also depends on design, surface condition, cooling, lubrication, process control, and heat treatment.
H13 is normally supplied in an annealed condition for machining and is hardened and tempered for service. A commonly encountered hardening temperature range is approximately 1,000–1,050°C, but the correct cycle depends on the product size, furnace practice, and supplier recommendations. Final hardness is application-specific; buyers should state a target range and verify that it is compatible with the required toughness and operating conditions.
Heat treatment should be planned with the tool’s geometry and section thickness in mind. Poorly controlled heating, quenching, or tempering can contribute to distortion, cracking, or uneven properties. For critical tooling, agree on the heat-treatment route, inspection method, and acceptance criteria before production rather than treating these as after-order details.
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H13 is widely considered for dies and inserts used in aluminum, magnesium, and zinc die casting. The material’s hot-work properties make it suitable for tooling exposed to molten metal contact and cyclic thermal loading. Die design, cooling-channel layout, surface treatment, casting conditions, and maintenance remain important factors in performance.
Hot-forging dies, punches, mandrels, and extrusion tooling may also use H13 where strength at elevated temperatures and resistance to wear are required. The best choice depends on contact pressure, workpiece temperature, cycle rate, and the consequences of tool failure. Where an application involves unusually severe impact, corrosion, or abrasive wear, compare H13 with alternative tool steels based on documented operating requirements.
Buyers commonly encounter the following designations when sourcing H13-type steel. They are widely used as cross-reference terms, but an equivalent-grade label does not prove that two products meet identical chemical, cleanliness, mechanical, or testing requirements. Confirm the relevant national or customer specification and the supplied certificate before accepting a substitution.
| Common designation | Standard or region commonly associated | Buyer note |
|---|---|---|
| AISI H13 | United States; common industry designation | State the applicable specification and supply condition. |
| 1.2344 / X40CrMoV5-1 | European designation | Check the exact standard and chemistry limits required. |
| SKD61 | Japanese designation | Verify the governing JIS requirements and certification. |
| 4Cr5MoSiV1 | Chinese designation | Confirm the applicable GB standard and product condition. |
H13 pricing is influenced by dimensions, quantity, product form, steelmaking and processing route, heat-treatment requirements, and inspection scope. Minimum order quantities and delivery schedules vary by supplier, stock availability, and whether material requires custom processing. For a useful quotation, provide the grade and standard, size, quantity, delivery location, required condition, and document requirements together.
When comparing offers, look beyond the unit price. Confirm whether cutting, machining allowance, heat treatment, packaging, and inspection documents are included or quoted separately. If the delivery schedule is critical, ask the supplier to confirm the material’s current availability and the estimated timeline for any additional processing.
Mingchuan supplies H13 mold steel for B2B buyers and can discuss grade, dimensions, quantity, and project requirements during the quotation process. To help us assess your request, send the required standard or equivalent-grade preference, product form, size, quantity, destination, and any certificate or inspection expectations. We can then confirm the available supply options and clarify which details need approval before an order is placed.
H13 is a hot-work tool steel suited to many die-casting, forging, and extrusion applications because it combines hot strength, toughness, and wear resistance. AISI H13, 1.2344, SKD61, and 4Cr5MoSiV1 are common cross-reference designations, but buyers should verify the exact standard and certificate rather than assume complete equivalence. The next step is to define your operating conditions and purchase requirements, then request a quotation that specifies grade, dimensions, condition, inspection, and delivery needs. Contact Mingchuan with those details to discuss H13 supply options for your project.
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