8407 Tool Steel: Properties, Applications, and Equivalent Grades
8407 is a chromium-molybdenum-vanadium hot-work tool steel used for tooling exposed to heat, pressure, and repeated thermal cycling. It is commonly compared with AISI H13, EN/DIN 1.2344, and Japanese SKD61, but these designations should be treated as closely related grades rather than guaranteed, specification-for-specification equivalents. For purchasing or replacing an existing material, confirm the governing standard, chemical limits, delivery condition, and heat-treatment requirements with your supplier.
Click here to get more.
This guide explains the material’s role, typical properties, applications, equivalent-grade terminology, and practical selection checks. It also highlights why “8407” alone may not provide enough detail for a reliable purchase specification.
Key Takeaways
- 8407 is a hot-work tool steel, not a stainless steel; its chromium content does not make it stainless.
- It is often compared with H13, 1.2344, and SKD61, but exact interchangeability depends on the supplier’s grade definition and the applicable standard.
- It is commonly considered for die casting, hot forging, and extrusion tooling where hot strength, toughness, and thermal-fatigue resistance matter.
- Before ordering, specify the required standard, product form, dimensions, delivery condition, inspection documents, and heat-treatment route.
What Is 8407 Tool Steel?
Material type and basic concept
8407 is a hot-work die steel formulated for tooling that operates at elevated temperatures. Its alloy design typically combines chromium with molybdenum and vanadium, supporting a balance of hot strength, hardenability, wear resistance, and toughness. The actual composition and performance depend on the specific producer’s grade, manufacturing route, and condition of supply.
Despite its chromium content, 8407 should not be classified as stainless steel. It is selected as a tool steel for hot-work service, not for corrosion resistance, so tooling may require appropriate storage, handling, and surface protection against rust. Buyers seeking corrosion-resistant tooling should assess a different material family against the application requirements.
Typical Properties and Specifications
Composition and performance considerations
For comparison, commonly published H13 composition ranges include approximately 0.32–0.45% carbon, 4.75–5.50% chromium, 1.10–1.75% molybdenum, and 0.80–1.20% vanadium by weight. These are H13 reference ranges, not a substitute for the chemical specification of a particular 8407 product. Request the supplier’s grade data and material test documentation before assuming that a shipment meets a particular H13 or 8407 composition.
In service, the relevant properties are not limited to nominal chemistry. Tool life can also depend on cleanliness, material uniformity, forging or remelting route, section size, heat treatment, machining, surface finish, and operating conditions. A grade name alone cannot predict the life of a die or establish a guaranteed performance level.
Heat treatment and condition
Hot-work tool steels are typically supplied in an annealed condition for machining, then hardened and tempered for service. As a general H13 reference, hardening temperatures are often in the range of about 1,020–1,050°C, followed by quenching and tempering; the correct schedule must come from the exact grade producer’s instructions. Furnace design, part size, section changes, and required working hardness can all affect the procedure.
Do not apply a generic heat-treatment schedule to an unidentified 8407 product. Confirm preheating, austenitizing, quench method, tempering temperature, and any stress-relief steps with the supplier or heat-treatment provider. For critical tooling, agree on the target hardness and inspection method before processing.
Applications and Material Matching
Where 8407 is commonly considered
Typical application areas include pressure die-casting dies and inserts, hot-forging dies, extrusion tooling, and other hot-work components exposed to repeated heating and cooling. These operations can impose a combination of thermal fatigue, mechanical loading, abrasion, and localized impact. The most suitable grade and condition depend on which failure mode is limiting the tool.
For more information, please visit Mingchuan.
For example, a die suffering from heat checking may need attention to thermal cycling, cooling layout, surface condition, and hardness as well as steel selection. A tool failing through cracking may call for a review of toughness, machining marks, stress concentration, and heat treatment. Changing material without diagnosing the failure may not address the root cause.
Matching grade to operating conditions
Start with the process temperature, contact time, cooling practice, impact level, and expected production cycle. Then identify whether the main requirement is resistance to thermal fatigue, hot wear, deformation, or cracking, since improving one property can involve trade-offs with another. Share these operating details with the steel supplier when requesting a recommendation.
Equivalent Grades: How to Interpret Them
8407 is frequently discussed alongside AISI H13, EN/DIN 1.2344, and JIS SKD61. These grades are broadly associated with chromium-molybdenum-vanadium hot-work steels and may be suitable comparison points during sourcing. However, a familiar equivalent-grade label does not by itself prove that chemistry limits, cleanliness, product condition, or customer-specific requirements are identical.
| Designation | How buyers commonly use it | What to verify |
|---|---|---|
| 8407 | Supplier or producer grade designation for hot-work tool steel | Producer, grade version, specification, and delivery condition |
| AISI H13 | Common comparison grade for hot-work tooling | Applicable standard, chemistry, and acceptance requirements |
| EN/DIN 1.2344 | European designation often compared with H13-type steel | Standard edition, product form, and required documentation |
| JIS SKD61 | Japanese designation often used as a comparison point | Current specification and any customer-specific deviations |
For a replacement purchase, compare the written requirements rather than relying on a conversion chart alone. If a drawing or qualified process names one standard, obtain approval before substituting another designation. This is especially important for safety-critical or high-cost tooling where a material mismatch can create production and quality risks.
A Practical Selection Framework
Define the purchase specification
- State the grade and standard. Identify whether the requirement is 8407, H13, 1.2344, SKD61, or a customer-controlled specification, and indicate whether alternatives are allowed.
- Specify the product form and size. Provide the required plate, bar, block, or other form, along with dimensions, tolerances, and any machining allowance.
- Confirm the supply condition. State whether the material should be annealed, pre-hardened, or supplied in another agreed condition.
- Agree on documentation and inspection. Ask what chemistry, traceability, inspection records, and documents can be provided for the order, and list any mandatory acceptance criteria.
- Review processing needs. Align on heat treatment, machining sequence, surface finishing, and any special requirements before production begins.
Consider price, MOQ, and lead time
The quoted price for 8407 can vary with dimensions, quantity, product form, processing, inspection scope, and delivery destination. Minimum order quantities and lead times are supplier- and stock-dependent, so they should be confirmed against the exact size and condition rather than assumed from the grade name. When comparing offers, review the total supply scope and delivery basis, not just the price per unit of weight.
Supplier Evaluation Checklist
A capable supplier should be able to clarify what its 8407 designation means and identify the applicable material specification. Ask whether the quoted material matches your required chemistry and delivery condition, and what documentation is available for traceability and inspection. Also confirm available sizes, processing options, packaging, and how substitutions will be handled.
At Mingchuan, we support B2B buyers evaluating hot-work tool steel requirements by discussing grade designation, dimensions, supply condition, and documentation needs before quotation. Share your drawing or purchase specification, target quantity, and destination so we can review the requested scope and confirm availability and commercial details. Any grade substitution should be agreed in writing before ordering.
Conclusion: Is 8407 the Right Choice?
8407 is a practical candidate for hot-work tooling that needs a balance of strength, toughness, and resistance to thermal cycling, and it is commonly compared with H13, 1.2344, and SKD61. Those names are useful starting points for material comparison, but they do not guarantee exact equivalence. The right next step is to match the operating conditions to a written material specification, then confirm grade identity, supply condition, heat-treatment instructions, and documentation with your supplier.
For a quotation or grade review, send Mingchuan your required designation, product form, dimensions, quantity, and any inspection or documentation requirements. This information helps us assess the request accurately and identify questions that should be resolved before procurement.