8407 tool steel flat bar is a chromium-molybdenum-vanadium hot-work steel used for 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 grade families rather than guaranteed one-to-one equivalents. Buyers should confirm the applicable standard, product condition, size, and material documentation before ordering. This guide explains the grade, its typical applications, selection considerations, and how to assess supplier quotations.
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8407 is a hot-work tool steel grade name used for steel intended to retain useful strength and resist thermal fatigue in tooling applications. The material is generally associated with a chromium-molybdenum-vanadium alloy system. Its balance of hardenability, hot strength, and resistance to wear makes it a candidate for dies and related tooling, subject to the tool design and operating conditions.
Because “8407” may refer to a particular producer’s grade or product specification, the name alone does not establish the exact chemical limits, cleanliness level, or delivery condition. We recommend checking the supplier’s current datasheet and material test documentation. When comparing offers, buyers should confirm that all suppliers are quoting the same specification and condition.
8407-type steels are usually selected for the combined demands of hot-work service rather than for one property in isolation. Chromium contributes to hardenability and resistance to oxidation, while molybdenum and vanadium support strength and wear resistance at elevated temperatures. Actual results depend on the melt, processing route, section size, and heat-treatment cycle, so a grade label should not replace product-specific verification.
For context only, representative AISI H13 reference chemistry commonly includes about 4.75–5.50% chromium, 1.10–1.75% molybdenum, and 0.80–1.20% vanadium by weight. These ranges describe a commonly cited H13 specification, not a guaranteed analysis for every product sold as 8407. Buyers should use the chemistry limits in the agreed specification and verify them against the mill test certificate.
| Designation | How It Is Commonly Used in Comparisons | Buyer Caution |
|---|---|---|
| 8407 | Hot-work tool steel grade or producer-specific designation | Confirm the exact producer specification and product condition. |
| AISI H13 | Common international reference for chromium-molybdenum-vanadium hot-work steel | Compare the governing standard and chemistry limits, not just the name. |
| DIN 1.2344 | European grade commonly associated with H13-type applications | Check the required standard edition and delivery condition. |
| JIS SKD61 | Japanese hot-work tool steel grade often listed as a comparison | Confirm whether the requested specification permits substitution. |
These grades are frequently grouped as equivalents in commercial discussions, but equivalence is not automatic. Differences in permitted chemistry, steelmaking, cleanliness, testing, and heat treatment can affect tool performance and consistency. If a drawing or customer specification names a particular grade, obtain written approval before substituting another designation.
8407 flat bar may be used to manufacture hot-work tooling such as die inserts, forging dies, extrusion tooling, and components for pressure die casting. It can also suit tooling parts that experience repeated heating and cooling, where resistance to thermal cracking is an important design consideration. The best choice depends on factors such as working temperature, contact pressure, cooling method, production cycle, and the consequences of tool failure.
Flat bar form can be useful when a tool has a rectangular cross-section or when stock needs to be cut and machined to a custom blank. Buyers should confirm whether the bar is supplied in annealed, pre-hardened, or another specified condition, since machinability and the subsequent heat-treatment plan are linked to delivery condition. Stock availability and practical size tolerances may also influence the amount of machining required.
Start with the tooling process and the main failure risk: thermal fatigue, cracking, wear, deformation, or a combination of these. Record the operating environment, expected contact conditions, cooling approach, and any established tool-life requirements. This information helps determine whether 8407 is appropriate or whether another hot-work or cold-work steel should be evaluated.
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State the grade and governing specification, then add the required thickness, width, length, quantity, and dimensional tolerances. Include the requested delivery condition and any requirements for machining allowance or surface condition. If heat treatment is part of the project, identify who will perform it and align the supply condition with that process.
Generic H13-family heat-treatment references may include hardening temperatures in the approximate range of 1,000–1,050°C, but this is not a universal instruction for every 8407 product or section size. The appropriate cycle depends on the producer’s recommendations, furnace control, part geometry, and target properties. Use the product-specific technical data and qualified heat-treatment guidance rather than applying a range as a stand-alone recipe.
Ask the supplier to identify the exact grade specification and provide the material documentation agreed for the order. Review chemistry, heat or batch identification, dimensions, and delivery condition against the purchase requirements. Where a substitute grade is proposed, compare the relevant specification limits and request technical approval from the tool designer or end user.
The price of 8407 flat bar is influenced by dimensions, order quantity, product condition, processing requirements, and the requested documentation. Cut-to-size service, special tolerances, or additional inspection may affect both cost and delivery schedule. There is no single reliable price or lead time without a defined specification and current stock check.
Minimum order quantity can vary with available stock and whether the material must be produced or processed specifically for the order. For accurate quotations, provide a complete size list, total quantity, destination, delivery preference, and required documents. If a project has a fixed deadline, request confirmation of stock status and dispatch timing in writing before placing the order.
At Mingchuan, we support B2B buyers by reviewing the requested grade, dimensions, and application details before preparing a quotation. We can discuss available product conditions, documentation requirements, and whether a proposed grade comparison needs further technical confirmation. Share your drawing or size list along with the intended use so that the quotation can address the actual procurement requirements.
8407 tool steel flat bar is a practical candidate for hot-work tooling where strength, wear resistance, and thermal-fatigue considerations must be balanced. AISI H13, DIN 1.2344, and JIS SKD61 are common comparisons, but buyers should not assume that these grades are interchangeable without checking the specifications and obtaining approval where required. The right selection depends on service conditions, product condition, and the complete heat-treatment and machining plan.
For your next step, prepare the required grade or approved equivalent, dimensions, quantity, delivery condition, documentation needs, and application details. Send these requirements to Mingchuan for a specification review and quotation. Confirm all technical and commercial terms before order placement to reduce substitution, processing, and delivery risks.
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