ASSAB 8407 Steel: Properties, Applications, and Equivalent Grades
ASSAB 8407 is a chromium-molybdenum-vanadium hot-work tool steel used for dies and tooling exposed to heat, pressure, and repeated thermal cycling. It is commonly compared with AISI H13, DIN 1.2344, and JIS SKD61, but these designations should be treated as comparable grades rather than automatic, specification-for-specification substitutes. Its balance of hot strength, wear resistance, and toughness makes it suitable for many die-casting, extrusion, and forging applications. The right grade and condition depend on the tool’s operating temperature, loading, heat treatment, and required service life.
Key Takeaways
- ASSAB 8407 is a hot-work tool steel, not a stainless steel.
- It is an H13-type grade and is often compared with 1.2344 and SKD61.
- Typical alloying includes chromium, molybdenum, and vanadium, supporting performance in hot-tool applications.
- Equivalent-grade selection requires checking the applicable standard, chemical composition, delivery condition, and material certificate.
- For a purchase decision, confirm the tool’s working conditions and discuss dimensions, processing, quantity, and documentation with the supplier.
Who This Guide Is For
This guide is for engineers, toolmakers, procurement teams, and distributors evaluating ASSAB 8407 for a new or replacement hot-work tool. It is also useful when a drawing or specification lists H13, 1.2344, or SKD61 and the buyer needs to assess whether an available material is suitable. Grade names alone do not confirm that two products have the same manufacturing route or properties. Buyers should verify the requirements against the drawing, applicable standard, and material certificate.
What Is ASSAB 8407 Steel?
ASSAB 8407 is a proprietary trade designation for a hot-work tool steel in the H13 family. The alloy is designed for tooling that experiences elevated temperatures during service, such as dies used in metal forming and casting. Chromium contributes to hardenability and wear resistance, while molybdenum and vanadium are used to support strength and resistance to softening at working temperatures. Actual performance depends on steel quality, tool design, heat treatment, surface condition, and operating practice.
Despite occasional confusion caused by broad product categories, 8407 is not stainless steel. It is a tool steel selected for hot-work duties, and it should not be specified as a corrosion-resistant material without a separate engineering assessment. If a tool also needs corrosion resistance, buyers should evaluate the environment and consider whether protective coatings, maintenance, or a different material system is appropriate. The steel’s designation alone does not guarantee corrosion protection.
Typical Composition and Grade Equivalents
Representative H13-Type Chemistry
The following values are representative of an H13-type composition and are provided for general grade orientation. They are not a substitute for the current ASSAB 8407 product datasheet or a heat-specific inspection certificate. Exact limits can differ by standard, manufacturer, product version, and supply condition, so use the governing specification when chemistry is contractually important.
| Element | Representative content by weight | Typical role in the alloy |
|---|---|---|
| Carbon (C) | About 0.39% | Contributes to hardness and strength after heat treatment. |
| Chromium (Cr) | About 5.2% | Supports hardenability, wear resistance, and hot-work performance. |
| Molybdenum (Mo) | About 1.4% | Helps maintain strength during elevated-temperature service. |
| Vanadium (V) | About 0.9% | Contributes to wear resistance and the steel’s response to heat treatment. |
Commonly Compared Grades
ASSAB 8407 is commonly compared with AISI H13, DIN 1.2344 or X40CrMoV5-1, and JIS SKD61. These designations indicate closely related hot-work tool steel families, but they do not prove that products are identical in chemistry limits, cleanliness, production process, or delivered properties. Where interchangeability matters, compare the relevant standards and product documents line by line. A material certificate should identify the supplied grade and its measured heat chemistry.
Properties and Performance Considerations
The main reason buyers consider an H13-type steel is its combination of hot strength and toughness. Tooling can be exposed to repeated heating and cooling, mechanical impact, abrasion, or pressure, and a balanced property profile can help address these combined demands. No steel eliminates thermal cracking, wear, or deformation in every application. Tool geometry, cooling design, surface treatment, and process control remain important to service performance.
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ASSAB 8407 is normally supplied in a condition intended for subsequent machining and heat treatment, but the exact condition and hardness depend on the product form and supplier documentation. Heat treatment should follow the current grade-specific recommendations and account for tool size, furnace control, and the required final hardness. Applying a generic H13 cycle without confirming its suitability can lead to distortion, cracking, or inconsistent properties. Ask the supplier or heat-treatment provider to confirm the appropriate route for the actual section size and end use.
Applications and Material Matching
Where ASSAB 8407 Is Commonly Considered
- Die casting: Dies and inserts exposed to molten metal contact and repeated thermal cycling.
- Hot extrusion: Dies, mandrels, and related tooling subject to heat, pressure, and wear.
- Hot forging: Dies and tooling where impact resistance and strength at elevated temperatures are relevant.
- Other hot-work tooling: Components such as punches or cores, when the design and service conditions suit an H13-type steel.
Application matching should begin with the failure mode, not just the existing grade name. For example, premature cracking may call for investigation of toughness, heat treatment, stress concentration, or cooling practice, while rapid surface wear may require a review of contact conditions and surface treatment. If the tool softens or deforms in service, verify the operating temperature and final hardness before selecting a replacement. A grade change alone may not correct a process or design issue.
How to Select and Specify ASSAB 8407
A Practical Buyer Framework
- Define service conditions. Record the process, operating temperature range, loading, thermal cycling, cooling method, and known tool failure modes.
- Confirm the grade requirement. Check whether the drawing requires ASSAB 8407 specifically or permits an H13-family equivalent under a named standard.
- Set the supply condition. State the required product form, dimensions, machining allowance, delivery condition, and any heat-treatment requirements.
- Agree on verification. Specify the material certificate and any required chemistry, hardness, ultrasonic inspection, or other acceptance criteria before ordering.
- Review processing needs. Confirm cutting, machining, heat-treatment, and finishing requirements with the relevant technical providers.
Common Sourcing Mistakes
A frequent mistake is treating “H13 equivalent” as proof of full interchangeability. Buyers may also overlook whether the quoted product is annealed, pre-machined, heat-treated, or supplied in a different dimensional tolerance. Another risk is comparing prices without aligning certificate requirements, inspection scope, and delivery terms. A complete RFQ reduces ambiguity and makes supplier quotations easier to compare.
Pricing, MOQ, and Lead Time
Price and lead time depend on factors such as product form, dimensions, required quantity, stock availability, processing, inspection, and shipping destination. Minimum order quantities are supplier- and product-specific; they should be confirmed for the requested size and condition rather than assumed from the grade name. Special dimensions, cutting, or additional inspection may affect both cost and delivery timing. For an accurate quotation, provide the grade, dimensions, quantity, required documents, delivery location, and target schedule.
Supplier Evaluation Checklist
- Can the supplier confirm the exact grade designation and supply condition?
- Will the quotation identify dimensions, tolerances, quantity, and delivery terms?
- Can the supplier provide a heat-specific material certificate and clarify its scope?
- Are any requested inspections or processing steps stated in writing?
- Does the supplier explain the limitations of any proposed equivalent grade?
At Mingchuan, we support B2B buyers with inquiries for ASSAB 8407 and comparable hot-work tool steel requirements. Share your drawing or specification, required dimensions, quantity, destination, and documentation needs so our team can review the request and confirm available supply options. If you are considering an equivalent grade, include the governing standard and application details for a more useful comparison. Final material approval should remain aligned with your engineering specification and quality requirements.
Conclusion
ASSAB 8407 is an H13-type hot-work tool steel commonly compared with AISI H13, DIN 1.2344, and JIS SKD61. It is considered for die casting, extrusion, forging, and related tooling because of its balanced hot-work properties, but equivalent grade labels do not ensure identical material or performance. To choose confidently, confirm the service conditions, applicable specification, supply condition, and certificate requirements before purchase. Send Mingchuan your grade, dimensions, quantity, and delivery requirements to discuss a suitable quotation and sourcing plan.