SKD61 Steel Buyer’s Guide: Properties, Applications, and Specifications
SKD61 is a chromium-molybdenum-vanadium hot-work tool steel used for dies and tooling exposed to elevated temperatures, repeated heating, and mechanical stress. Buyers typically consider it for die casting, hot forging, and hot extrusion applications where resistance to heat checking and wear is important. It is commonly compared with H13, but equivalent designations do not automatically guarantee identical chemistry, processing, or performance. We recommend selecting SKD61 by application, required condition, dimensions, and the governing specification—not by grade name alone.
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Who This Guide Is For
This guide is for purchasing teams, toolmakers, engineers, and distributors evaluating SKD61 for new tooling or replacement parts. It is useful when you need to compare material options, prepare a complete RFQ, or clarify what information should appear on an order. The guidance is general; the final material condition and heat-treatment route should be confirmed against the tool design and applicable standard.
What SKD61 Steel Is
Composition and material context
SKD61 is a Japanese-designation hot-work tool steel. It is not stainless steel: its chromium content contributes to hardenability and high-temperature performance, but it does not make the grade corrosion-proof. SKD61 is often associated with H13 under ASTM terminology and 1.2344 under European designation systems, but buyers should verify the exact standard and chemical limits required for their project.
Typical SKD61 chemistry includes approximately 0.35–0.42% carbon, 4.80–5.50% chromium, 1.20–1.50% molybdenum, and 0.80–1.15% vanadium by mass. These figures are useful for initial comparison, not a substitute for the limits in the purchase specification. The applicable standard, steelmaking route, and supplier documentation determine the values to be verified for a particular order.
Properties that matter in hot-work tooling
The alloy balance supports a combination of hot strength, hardenability, and resistance to thermal fatigue. In service, these qualities can help tooling withstand repeated contact with hot workpieces or molten metal, although results depend on tool geometry, operating conditions, heat treatment, and maintenance. SKD61 is usually supplied in an annealed condition for machining before hardening, but the condition must be stated and confirmed at quotation.
Applications and Material Options
Where buyers commonly use SKD61
Typical applications include die-casting dies, hot-forging dies, hot-extrusion tooling, and other tooling exposed to elevated temperatures. It may also be considered for inserts, cores, and components that experience thermal cycling and pressure. Suitability depends on the actual process: a die-casting tool, for example, faces different thermal and mechanical demands from a forging die.
SKD61 is available to buyers in different product forms and delivery conditions, depending on supplier capability and order requirements. Common procurement discussions cover round or flat stock, cut-to-size pieces, annealed material, and material intended for further heat treatment. Before ordering, confirm whether the quotation covers raw stock only or includes cutting, machining, heat treatment, or other processing.
Key specifications to put in an RFQ
A grade name alone is not a complete specification. Include the required standard and edition, product form, finished or stock dimensions, tolerances, delivery condition, quantity, and any inspection or documentation requirements. If the tool requires a particular hardness after heat treatment, identify the target and whether it applies to the supplied steel or the finished component.
| Specification item | What to clarify |
|---|---|
| Grade and standard | SKD61 designation, required standard, and whether a named equivalent is acceptable |
| Dimensions and shape | Section size, length, tolerance, machining allowance, and cutting requirements |
| Condition | Annealed or another agreed supply condition; state any heat-treatment requirements |
| Quality documents | Required material test documentation, traceability, and inspection scope |
How to Select SKD61 for Your Project
Use an application-first selection framework
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Define the service environment. Describe process type, working temperature range, contact material, production cycle, and the main failure concern. If you have a failed tool, note whether the damage appears to be cracking, heat checking, wear, deformation, or another issue.
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Confirm the required steel and condition. Check the drawing, toolmaker’s recommendation, and applicable standard. Decide whether you need annealed stock for machining or material supplied to a specified condition, and make clear who is responsible for final heat treatment.
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Match dimensions to the machining plan. Give the supplier the required finished size and acceptable stock allowance. This helps avoid ordering an unsuitable section or paying for unnecessary material removal.
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Agree on verification and documentation. Specify which documents, traceability details, and inspection checks are required before placing the order. Confirm these requirements in writing rather than assuming they are included.
Heat treatment and hardness considerations
Published heat-treatment recommendations for SKD61 vary by standard, producer, section size, and intended application. As an initial reference only, hardening temperatures are often discussed around 1,000–1,050°C, followed by tempering selected for the required balance of hardness and toughness. These are not universal production instructions; the steel supplier or heat-treatment provider should confirm a cycle for the actual material size and tooling design.
Hardness requirements should be specified with the measurement scale, location, and stage of inspection. A target for annealed stock is not interchangeable with a target for a finished, hardened die. Where a tool has critical sections or complex geometry, discuss distortion risk and heat-treatment controls with the toolmaker before finalizing the order.
Pricing, MOQ, and Lead Time
SKD61 pricing is affected by product form, section size, quantity, cutting, processing, delivery condition, and documentation or inspection requirements. Market conditions and the requested source standard can also affect the quotation. Because these variables differ by order, we recommend requesting a project-specific quote rather than relying on a generic price per kilogram.
Minimum order quantities and lead times depend on the requested dimensions, availability, and any added processing. To help us assess an inquiry efficiently, provide the grade and standard, size, quantity, delivery condition, destination, and required delivery date. If an equivalent designation is acceptable, state that explicitly so the material can be reviewed before substitution.
Supplier Evaluation Checklist
Questions to ask before placing an order
- Can the supplier confirm the exact grade, standard, and supply condition being quoted?
- Are dimensions, tolerances, cutting scope, and machining allowance clearly stated?
- What material documentation and traceability can be supplied for this order?
- Are heat treatment and inspection included, excluded, or available as separate services?
- How will any proposed equivalent or deviation be reviewed and approved?
Compare quotations on the same technical basis. A lower material price may not include the same dimensions, condition, documentation, or processing scope as another offer. Ask the supplier to list exclusions and confirm the order details before production or shipment.
Summary and Next Steps
SKD61 is a hot-work tool steel commonly selected for die casting, forging, and extrusion tooling that faces elevated temperatures and thermal cycling. Its typical alloy composition includes about 4.80–5.50% chromium, 1.20–1.50% molybdenum, and 0.80–1.15% vanadium, but the governing standard and order documentation should define the material supplied. H13 and 1.2344 are commonly used comparison designations, not automatic proof of full interchangeability.
To make an informed purchase, match the grade and condition to the application, specify dimensions and verification needs, and confirm who is responsible for heat treatment. At Mingchuan, we can review your SKD61 inquiry against the requested product form, specification, quantity, and delivery requirements. Send your drawing or RFQ details for a project-specific quotation and clarification of the available supply options.