Complex-Geometry CNC Milled Tool Steel Die Block
Complex-geometry CNC milled tool steel die blocks with intricate cavities, multi-level surfaces, cooling channels, and precision bores for injection molds, die casting dies, and metal forming tooling. Available in D2, H13, P20, and M2 grades with vacuum heat treatment to 48–62 HRC. Max block size 800 × 600 × 400 mm, 3D contoured surfaces supported.
Manufacturing Processes :
CNC turning (multi-axis with live tooling), CNC milling (3/4/5-axis), cylindrical grinding, centerless grinding, honing, thread cutting, broaching, drilling & tapping, EDM wire-cut (partner)Heat Treatment :
Quench & temper | Case hardening / carburizing | Induction hardening | Solution annealing | Vacuum hardening | Nitriding | Stress relieving. Every heat treatment batch ships with time–temperature chart and hardness report.Surface Treatment :
Zinc plating (clear/yellow passivation) | Zinc-nickel alloy | Electroless nickel | Hard chrome plating | Black oxide | Phosphating (MnPO4) | Passivation (ASTM A967) | Electropolishing | Anodizing (aluminum) | Powder coatingCustomizable :
YesOrder(MOQ) :
Prototype: 1–10 pcs (no MOQ for billet-machined parts). Small batch: 10–500 pcs. Series production: 500–50,000+ pcs/month.Specifications
Shengtao's complex-geometry CNC milled tool steel die blocks are produced through a carefully sequenced manufacturing process that begins with rough machining of the block in the annealed condition, when the tool steel is at its most machinable (typically 200–250 HB). The block is then stress-relieved to reduce residual machining stress before finish-machining of critical surfaces and features, leaving a grinding allowance of 0.1–0.3 mm on surfaces that will be ground to final tolerance after heat treatment. The machined block is then vacuum heat-treated to the specified hardness, followed by finish grinding, jig grinding, and — where 3D cavity surfaces are involved — EDM sinking with graphite or copper electrodes produced from the same CAD model used for milling, ensuring cavity geometry is faithfully reproduced to within ±0.01 mm.
Tool steel grade selection is critical because the die block is the foundation of the entire tool. D2 (1.2379) is a high-carbon, high-chromium cold-work tool steel that, after vacuum hardening and double tempering to 58–62 HRC, delivers outstanding abrasion resistance and dimensional stability — making it the standard choice for stamping die blocks, blanking plates, and progressive die components. H13 (1.2344) is a hot-work tool steel designed for cyclic thermal loading: after hardening to 48–52 HRC, it maintains strength and resists thermal fatigue cracking in die casting dies, extrusion dies, and hot-forging tooling. P20 (1.2311) is supplied in the pre-hardened condition at 28–34 HRC, allowing direct finish-machining with no post-HT distortion — ideal for large injection mold plates where heat treatment of the finished block would risk warping. M2 (1.3343) is a high-speed steel hardened to 62–66 HRC for cutting tool bodies and inserts where maximum edge retention is required.
Every die block is inspected against your 3D model or drawing before and after heat treatment. Dimensional verification on cavity profiles, guide bores, and parting surfaces is performed on CMM, with hardness verified by Rockwell testing at multiple locations across the block. The heat treatment time–temperature chart and vacuum furnace pressure log are included in the documentation package. Contact us with your die block drawing or 3D model for a quotation within 24 hours.
Complex-Geometry CNC Milled Tool Steel Die Block is one of our core strength products. We maintain substantial inventory to ensure rapid delivery and can also customize extra-large diameter seamless pipes according to your specific requirements. Additionally, we provide comprehensive services including spectroscopic analysis, mechanical property testing, pressure testing, and non-destructive testing (NDT).
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Note: If you do not find a Complex-Geometry CNC Milled Tool Steel Die Block that meets your requirements or is suitable for your customer’s project, please contact our manager sales consultant (Email: stsalesman4@stmetal001.com) and send us your specifications and technical parameter files to obtain Customized quotation plan. |
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FAQs
Q: What machined parts and fabrication services does Shengtao provide?
Shengtao is a China-based, ISO 9001-certified one-stop manufacturer delivering precision-machined and fabricated metal parts across 10 product categories:
• CNC Precision Machined Parts — turned, milled, and 5-axis complex components
• Stamped & Formed Metal Parts — progressive die stamping, deep drawing, sheet metal fabrication
• Welded & Fabricated Steel Assemblies — structural weldments, pressure vessel shells, pipe spools
• Hydraulic & Pneumatic Components — honed cylinder barrels, chrome-plated piston rods, valve bodies
• Automotive Precision Parts — drivetrain, suspension, steering, and engine components
• Surface-Treated Steel Parts — mirror polishing, electropolishing, hard chrome, zinc/nickel plating
• Precision Tube & Pipe Machined Parts — tube end machining, honing, pipe spool assemblies
• Laser Cut & Waterjet Cut Parts — precision 2D profiles up to 150 mm thick
• Machined Pipe & Tube Fittings — threaded fittings, forged flanges, custom connectors
• Special Alloy & High-Performance Parts — Inconel, Hastelloy, Titanium, tool steel components
We work from your drawings, providing customized parts — we do not sell standardized off-the-shelf items. Send your RFQ with a drawing to start a quotation.
Q: Can you manufacture custom parts from my engineering drawings? What file formats do you accept?
A: Yes — custom manufacturing to your drawings is our core business. We accept:
• 2D drawings: PDF, DWG, DXF
• 3D models: STEP (.stp), IGES (.igs), SolidWorks (.SLDPRT / .SLDASM), CATIA, Inventor
The process is straightforward:
1. Send your drawing/model with material specification, quantity, and any special requirements.
2. We sign an NDA before reviewing your files.
3. Our engineering team performs a DFM (Design for Manufacturability) review and flags any concerns.
4. We send a formal quotation with price, lead time, and technical notes within 24–48 hours.
We handle everything from raw material sourcing through machining, heat treatment, surface finishing, inspection, and export packaging — delivering parts ready for your assembly line.
Q: What materials can you source and machine for my parts?
A: We source and machine a comprehensive range of metals, all with certified mill test reports (MTR):
Stainless steel: 303, 304, 316, 316L, 321, 410, 420, 430, 2205, 2507 (duplex/super duplex)
Carbon steel: A36, 1020, 1045, A105, A106 Gr.B, API 5L X42–X80, S235, S355
Alloy steel: 4140, 4340, 8620, 42CrMo4, 34CrNiMo6, 20CrMnTi, A387 Gr.11/22
Aluminum: 6061-T6, 7075-T6, 5052, 5083
Tool steel: D2, H13, M2, P20, S7
Nickel alloys: Inconel 600/601/625/718, Hastelloy C-276/C-22, Monel 400
Titanium: Grade 1, Grade 2, Grade 5 (Ti-6Al-4V), Grade 23 (Ti-6Al-4V ELI)
Brass & copper: C36000, C11000, C26000
If your specification calls for a material not listed above, please ask — we work with approved steel mills and can source commercial grades, pressure-vessel grades, and AMS/aerospace grades.
Q: Do you offer welding and fabrication for complex assemblies, including code-compliant work?
A: Yes. Welding and fabrication is a core Shengtao capability, covering single-part weldments through to fully welded structural frames, pressure vessel shells, and pipe spools.
Welding processes: SMAW, GMAW/MIG, GTAW/TIG, SAW (submerged arc), FCAW, orbital TIG
Welder qualifications: AWS D1.1 / D1.6, ASME Section IX, EN ISO 9606
NDE capabilities: 100% VT, PT, MT, UT, RT (X-ray) available, including third-party witness
We fabricate to:
• ASME Section VIII Div.1 — pressure vessels
• ASME B31.1 / B31.3 / B31.4 — power, process, and liquid piping
• AWS D1.1 — structural steel
• PED 2014/68/EU — European pressure equipment
• NACE MR0175 / ISO 15156 — sour service
Every fabrication ships with a full data book: weld map, WPS/PQR, welder qualifications, NDE reports, MTRs, dimensional inspection, and hydrostatic test certificate.
Q: Do you offer engineering support or design feedback on my part drawings?
A: Yes, and we encourage it. Our in-house engineering team reviews every drawing before production and provides DFM (Design for Manufacturability) feedback at no cost:
We check for:
• Machinability: features that are difficult or impossible to produce (e.g., sharp internal corners, unreachable undercuts, extreme aspect ratios)
• Tolerance optimization: identifying dimensions where looser tolerances can reduce cost without affecting function
• Material alternatives: suggesting equivalent grades if the specified material has long lead times or is cost-prohibitive
• Cost reduction opportunities: changes that simplify fixturing, reduce setups, or allow more efficient tooling
This is a value-added service at no extra charge — many customers have reduced per-part cost by 15–30% through DFM suggestions while maintaining full functionality.
We never modify your drawing without your written approval. All DFM suggestions are clearly annotated on a marked-up drawing for your review.
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Note: If you do not find a Complex-Geometry CNC Milled Tool Steel Die Block that meets your requirements or is suitable for your customer’s project, please contact our manager sales consultant (Email: stsalesman4@stmetal001.com) and send us your specifications and technical parameter files to obtain Customized quotation plan. |
For OEM projects requiring a pressure-vessel shell forming the pressure boundary, this Code-Compliant Welded Carbon Steel Pressure Vessel Shell is produced to the approved drawing. Manufactured in Carbon steel plate grade per approved vessel design from Rolled plate and formed heads, it uses plate rolling, fit-up and vessel welding to control shell diameter, seam joints, nozzle openings and flange interfaces. The specified surface preparation and coating per approved vessel specification is applied for industrial pressure systems and process equipment, with dimensions and acceptance criteria set by the approved drawing.
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High-Pressure Welded Stainless Steel Reactor Shell is not a catalogue item; it is a drawing-led high-pressure reactor shell with corrosion-conscious construction. Manufactured in Stainless steel grade per approved reactor design from Stainless plate and formed heads, it uses shell rolling and stainless welding to control shell seams, agitator/nozzle ports, flanges and internal attachment points. The specified pickled/passivated or specified corrosion-resistant finish is applied for chemical, pharmaceutical and specialty process reactors, with dimensions and acceptance criteria set by the approved drawing.
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Flanged Welded Alloy Steel Heat Exchanger Shell is configured as a custom flanged heat-exchanger shell for fluid-side containment. Manufactured in Alloy steel grade per approved exchanger design from Plate, pipe and formed shell components, it uses shell forming and welding to control flange faces, nozzle orientation, shell seams and tube-bundle interfaces. The specified protective treatment per approved specification is applied for heat-exchanger and thermal-process equipment, with dimensions and acceptance criteria set by the approved drawing.
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Designed from the customer technical file, this Honed & Ground Hydraulic Cylinder Barrel serves as a hydraulic cylinder barrel with controlled internal running surface. Manufactured in Seamless carbon or alloy steel tube grade per drawing from Seamless tube blank, it uses bore honing and od finishing to control honed ID, end faces, ports and mounting/thread interfaces. The specified honed bore protected against corrosion for shipment is applied for hydraulic cylinders in industrial and mobile equipment, with dimensions and acceptance criteria set by the approved drawing.
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The custom Chrome-Plated Hydraulic Cylinder Piston Rod is built around a specific functional role: hydraulic piston rod with wear-resistant outer surface. Manufactured in Carbon steel or alloy steel rod grade per drawing from Round bar or forged rod blank, it uses turning and grinding to control rod diameter, thread ends, piston attachment and sealing travel area. The specified hard-chrome-plated and polished surface per drawing is applied for hydraulic actuators, cylinders and lifting equipment, with dimensions and acceptance criteria set by the approved drawing.
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For OEM projects requiring a hydraulic cylinder end cap closing a pressure chamber, this Precision-Machined Hydraulic Cylinder End Cap is produced to the approved drawing. Manufactured in Carbon steel or alloy steel grade per drawing from Bar, forging or plate blank, it uses cnc turning and milling to control cap register, port threads, seal grooves, bolt circle and bore interface. The specified machined and protected condition per drawing is applied for welded, tie-rod and custom hydraulic cylinders, with dimensions and acceptance criteria set by the approved drawing.
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Forged Hydraulic Cylinder Clevis Mount is not a catalogue item; it is a drawing-led forked clevis mount transmitting cylinder force. Manufactured in Forged carbon or alloy steel grade per drawing from Closed-die forged clevis blank, it uses cnc machining of forged blank to control fork opening, pin bores, rod thread and mounting geometry. The specified machined forged surface; coating per drawing is applied for hydraulic cylinders, linkages and mobile machinery, with dimensions and acceptance criteria set by the approved drawing.
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Lapped-Finish Hydraulic Valve Spool is configured as a custom hydraulic valve spool with metering lands and grooves. Manufactured in Hardenable alloy or stainless steel grade per drawing from Precision round bar, it uses cnc turning and precision grinding to control spool diameter, land width, groove geometry and end connection. The specified lapped running surfaces and cleaned oil passages is applied for directional, proportional and control valves, with dimensions and acceptance criteria set by the approved drawing.
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