1.2344 steel flat bar is a hot-work tool steel used for tooling that must withstand repeated heat, pressure, and thermal cycling. It is commonly identified as X40CrMoV5-1 under the European designation system and is broadly comparable to AISI H13 and JIS SKD61, although equivalent grades are not automatically interchangeable. When sourcing it, buyers should confirm the governing standard, dimensions, material condition, inspection documents, and intended heat treatment before comparing quotations.
This guide is for purchasing teams, toolmakers, and engineers evaluating whether 1.2344 flat bar fits a tooling requirement. We explain its typical properties, common applications, grade-equivalence cautions, and practical sourcing checks. At Mingchuan, we recommend assessing the full specification rather than selecting material by grade name alone.
1.2344 is a chromium-molybdenum-vanadium hot-work tool steel. It is selected for tooling that experiences elevated temperatures and repeated operating cycles, including dies and molds used in metal-forming processes. Supplied as flat bar, it can be cut and machined into components such as inserts, blocks, and die sections.
The grade is sometimes described using its EN material number, 1.2344, or its steel name, X40CrMoV5-1. AISI H13 and JIS SKD61 are commonly cited counterparts. These names indicate broadly similar material families; they do not, on their own, prove that a particular bar meets the same chemical, mechanical, or inspection requirements.
Published composition ranges for 1.2344 commonly include carbon at approximately 0.35–0.42%, chromium at 4.80–5.50%, molybdenum at 1.20–1.50%, and vanadium at 0.85–1.15% by mass. These figures are indicative, not a substitute for the buyer’s specified standard or the supplier’s material test certificate. Confirm the applicable edition and acceptance limits when chemistry is critical to a tool design.
The alloying system supports hot-work performance, including resistance to softening at elevated temperatures and thermal fatigue under suitable service and heat-treatment conditions. Actual service life depends on factors such as tooling design, operating temperature, cooling practice, surface treatment, and heat treatment. We therefore avoid treating a grade designation as a guarantee of performance in a particular production process.
Buyers may encounter 1.2344 flat bar in annealed condition for machining before heat treatment, or in another agreed condition depending on the supplier’s product range. Surface finish and dimensional tolerances can vary by production route and order specification. State the required thickness, width, length, tolerances, straightness, surface condition, and any machining allowance on the inquiry.
Where the tool design requires a specific metallurgical route, ask whether the requested product is conventionally produced or supplied with a remelting route such as ESR. Do not assume that a process option is available or included in a standard quotation. Request confirmation of the route and the documentation that will be supplied for the actual batch.
1.2344 flat bar is used to manufacture hot-work tooling such as die-casting dies, hot-forging dies, extrusion tooling, and hot-shear blades. It may also be used for mold components and inserts exposed to heat and repeated mechanical loading. Suitability depends on the component’s geometry, thermal cycle, loading, cooling method, and required service life.
For a die insert, a buyer may prioritize machinability in the supplied condition and predictable heat-treatment response. For a component exposed to repeated heating and cooling, thermal-fatigue resistance and the quality of heat treatment may be more important. For tooling exposed to corrosive media, 1.2344 should not be assumed to provide stainless-steel corrosion resistance; evaluate a corrosion-resistant alternative or a suitable protection strategy with the engineering team.
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AISI H13 and JIS SKD61 are widely used comparison grades for 1.2344. They are often considered similar for hot-work tooling, but equivalence should be checked against the exact standard, product form, chemistry limits, and required mechanical or inspection properties. A purchasing specification that says only “H13 equivalent” can leave important acceptance details unresolved.
| Designation | How buyers commonly use it | What to confirm |
|---|---|---|
| 1.2344 / X40CrMoV5-1 | European designation for a hot-work tool steel | Applicable standard, product condition, chemistry, and inspection scope |
| AISI H13 | Common North American comparison grade | Whether the order must meet a specific AISI/ASTM or customer requirement |
| JIS SKD61 | Common Japanese comparison grade | Whether the required JIS specification and acceptance criteria are met |
For a replacement part, compare the material certificate and technical requirements for the original component instead of relying only on a cross-reference chart. If the end user requires a named standard, put that requirement on the purchase order and obtain written confirmation before production. This is especially important when a change in supply source or product route could affect machining or heat-treatment behavior.
Start with the component’s function and operating environment. Record the working temperature range, type of loading, exposure to cooling or thermal cycling, expected heat treatment, and any surface-treatment requirements. If the design authority has specified a grade or standard, preserve that requirement rather than substituting a “similar” material without approval.
List the grade and standard, flat-bar dimensions, length, quantity, delivery condition, dimensional tolerances, surface requirements, and documentation needs. Clarify whether the material will be supplied with a certificate and identify any required inspection or testing before placing the order. If cutting, machining, or a special production route is needed, describe it separately so the supplier can confirm feasibility and price it accurately.
Steel price is only one part of the purchase decision. Consider material utilization, cutting waste, machining allowance, transport, inspection requirements, and the time needed to qualify a new source. Request itemized quotations when comparing different conditions or processing routes so that differences are visible.
Minimum order quantity and lead time are not fixed properties of 1.2344. They depend on dimensions, stock availability, quantity, processing, and destination. Ask suppliers to state the quoted quantity basis, production or dispatch estimate, packaging details, and any assumptions that could change the schedule.
At Mingchuan, we support buyer inquiries by reviewing the requested grade, dimensions, condition, quantity, and documentation expectations before quotation. Sharing a drawing or a complete material specification helps us assess the request more accurately. Final availability and delivery terms should be confirmed for each order.
1.2344 steel flat bar is a hot-work tool steel suited to many tooling applications involving heat and repeated loading, and AISI H13 and JIS SKD61 are common comparison grades. The grade name alone does not establish that a bar meets a buyer’s exact requirements, so confirm the standard, chemistry, condition, dimensions, and documentation before ordering. It is also not a stainless steel and should not be chosen on the assumption that it offers stainless corrosion resistance.
To evaluate a supply option, prepare a specification that includes the application, dimensions, quantity, material condition, inspection needs, and delivery destination. Then request written confirmation of grade compliance, documentation, MOQ, and lead time. Contact Mingchuan with those details to discuss a 1.2344 steel flat bar quotation or clarify a grade-equivalence requirement.
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