8407 ESR Steel: Properties, Applications, and Equivalent Grades

8407 ESR steel is a premium remelted hot-work tool steel used for dies, molds, and tooling exposed to heat, pressure, and repeated thermal cycles. It is commonly associated with the H13 / EN 1.2344 / JIS SKD61 steel family, but an equivalent grade is not automatically identical in chemistry, cleanliness, or performance. The “ESR” designation refers to electroslag remelting, a secondary steelmaking process intended to improve material cleanliness and structural uniformity. For purchasing, confirm the producer’s grade designation, inspection documents, delivery condition, and heat-treatment requirements rather than relying on the grade name alone.

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Key Takeaways

• 8407 ESR is designed for hot-work applications that need a balance of hot strength, toughness, and resistance to thermal fatigue.
• H13, 1.2344, and SKD61 are commonly referenced equivalents, but substitution should be confirmed against the required specification and service conditions.
• ESR describes a remelting route; it does not, by itself, guarantee a particular hardness, service life, or certification.
• When requesting a quotation, provide dimensions, quantity, condition, required documents, and the intended application.

Who This Guide Is For

This guide is intended for toolmakers, mold manufacturers, die-casting operations, forging companies, and industrial buyers comparing hot-work tool steels. It is also useful for engineers who have been asked to approve an equivalent grade or assess whether ESR material is appropriate for a new or replacement tool. The information is general guidance, not a substitute for the producer’s technical data sheet or a heat-treatment plan developed for the specific tool.

What Is 8407 ESR Steel?

8407 is a commercial grade designation used for hot-work tool steel, while ESR identifies a remelting process applied to the steel. During electroslag remelting, a consumable electrode is remelted through a conductive slag bath; the process can help reduce inclusions and improve the consistency of the ingot structure. The exact result depends on the producer’s melting practice, controls, and product form, so buyers should review the documentation for the material being supplied.

In broad terms, 8407 ESR belongs to the chromium-molybdenum-vanadium hot-work steel family associated with H13-type steels. A typical H13 chemistry includes about 5% chromium, with molybdenum and vanadium contributing to strength and tempering response. These figures describe the steel family in general, not a guaranteed composition for every product sold as 8407 ESR; use the mill certificate and applicable product specification for exact values.

Common Equivalent Grade References

These grades are useful starting points for technical comparison, not a promise of direct interchangeability. Standard limits, producer-specific chemistry, remelting route, heat treatment, and inspection requirements can differ. If a drawing or purchase specification names a particular standard, ask the supplier to confirm compliance in writing before approving a substitute.

Properties and Functional Benefits

8407 ESR is selected for hot-work tooling because it is intended to retain useful strength at elevated temperatures while resisting cracking from repeated heating and cooling. Its alloy system supports hardening and tempering, and the steel can be heat-treated to a hardness appropriate to the tool design and operating conditions. The final balance of hardness and toughness depends on section size, heat-treatment practice, machining, and the producer’s recommendations.

ESR material is often considered where cleanliness and structural consistency are important, such as in larger or highly stressed tooling. The process can reduce certain forms of segregation and non-metallic inclusions, but it does not eliminate every material defect or remove the need for appropriate inspection. Ask what inspection level and documentation are available for the specific order rather than assuming that “ESR” means a particular test result.

Typical Application Areas

• Die casting: dies, inserts, and cores exposed to hot metal and cyclic thermal loading.
• Forging: hot-forming dies and tooling where strength and resistance to thermal fatigue matter.
• Extrusion: selected hot-work components, depending on the temperature, pressure, and wear conditions.
• Plastic molding: mold components where hot-work steel properties or the specified grade are needed.

Application suitability depends on more than the steel grade. Tool geometry, cooling, surface treatment, lubrication, operating temperature, and maintenance all influence performance. A tool exposed primarily to abrasion, corrosion, or cold impact may need a different grade or a tailored surface-treatment strategy.

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How to Choose the Right 8407 ESR Material

1. Define the operating conditions

Start with the tool’s working temperature, thermal-cycle frequency, contact pressure, wear mechanism, and expected maintenance interval. Describe whether the material will be used as a die block, insert, core, or another component, because section size and geometry affect processing and heat treatment. Clear operating information helps a supplier assess whether 8407 ESR is a reasonable candidate or whether another tool steel should be compared.

2. Specify grade, condition, and dimensions

State whether the order requires 8407 ESR specifically or permits an approved equivalent such as H13 or 1.2344. Include the requested delivery condition, finished dimensions or machining allowance, quantity, and any orientation or cutting requirements. If the application needs a particular hardness, provide the target range and clarify whether it applies to the supplied condition or after final heat treatment.

3. Verify documents and acceptance criteria

Request a material certificate and confirm which information it will include, such as grade, heat or batch identification, chemical analysis, and delivery condition. If ultrasonic inspection, special cleanliness requirements, or additional testing is necessary, specify the required standard and acceptance level before placing the order. Avoid treating a certificate title or a general ESR description as proof that all project-specific requirements have been met.

Pricing, MOQ, and Lead Time

Pricing for 8407 ESR steel depends on factors such as dimensions, order quantity, product form, delivery condition, machining or cutting requirements, and requested inspection documents. ESR production and specialized product sizes may affect availability compared with more common standard grades, but actual supply conditions vary by mill and market. Minimum order quantity and lead time should therefore be confirmed for the requested size and condition rather than assumed from the grade name.

For a useful quotation, send a drawing or size list, required grade and standard, quantity, destination, target delivery date, and documentation requirements. If you are considering an equivalent, identify which properties or specification clauses are essential so the supplier can check the comparison. This reduces the risk of quoting material that is technically close but does not meet the project’s acceptance criteria.

Supplier Evaluation Checklist

• Can the supplier identify the actual producer and confirm whether the offered material is ESR?
• Can the supplier provide traceable material documentation for the supplied batch?
• Are grade equivalency, chemistry, delivery condition, and heat-treatment expectations clearly stated?
• Are any required inspection methods and acceptance levels agreed before order confirmation?
• Are dimensions, tolerances, cutting needs, packaging, and delivery timing documented in the quotation?

At Mingchuan, we can review your grade reference, dimensions, quantity, and application details to help clarify the sourcing requirements for 8407 ESR steel. Share your drawing or material specification along with any required certificates or inspection criteria, and we can discuss availability and quotation details. Final grade approval should remain with your engineering or quality team when the material is safety-critical or controlled by a customer specification.

Conclusion

8407 ESR is a hot-work tool steel option for dies, molds, and tooling that need a considered balance of hot strength, toughness, and thermal-fatigue resistance. H13, EN 1.2344, and JIS SKD61 are common comparison references, but they should not be treated as automatic one-to-one replacements. To select material confidently, match the grade to the operating conditions, verify the actual producer and documentation, and agree on condition, inspection, and acceptance criteria before ordering.

Your next step is to prepare the required grade or approved equivalent, dimensions, quantity, application, and document requirements. Contact Mingchuan with these details to discuss sourcing options and obtain a quotation for your project.