DF5 / W5Mo2Cr4V2Co is a custom-developed cobalt-alloy tool and die steel independently designed by ZEICIN Steel. This grade is optimized for low-speed cutting, forming, and die applications where stable performance, edge strength, and wear resistance are critical.
Unlike conventional high-speed steels designed for extreme cutting speeds, DF5 / W5Mo2Cr4V2Co focuses on controlled wear behavior and toughness under continuous operation. Its balanced alloy design provides reliable heat stability, good resistance to edge chipping, and consistent performance in demanding industrial environments.
This steel is widely used in metalworking, forming, and tooling operations that require long service life and predictable performance rather than maximum cutting speed.
Low-Speed Cutting Tools
Suitable for drills, milling cutters, and saw blades operating at low to medium cutting speeds, providing stable cutting and long service life.
Wear-Resistant Metalworking Tools
Used for tools requiring reliable wear resistance and steady performance under continuous metalworking operations.
Tool & Die Applications
Ideal for punching, trimming, forming, and general die tooling where toughness and edge strength are essential.
Precision Tools and Industrial Components
Applied in precision cutting, forming, and shaping tools that demand accuracy, stability, and consistent results.
| ZEICIN Grade | GB | AISI |
| DF5 | W5Mo2Cr4V2Co | – |
| Elemnet | C | W | Mo | Cr | V | Co | Al | Mn | Si | S | P |
| Contene(%) | 0.88 | 5.20 | 1.80 | 4.10 | 1.55 | 1.20 | – | 0.35 | 0.80 | 0.03 | 0.03 |
Softens DF5 / W5Mo2Cr4V2Co steel (HB ~255), relieves internal stress, and improves machinability prior to hardening.
Heat to 1150–1200 °C, followed by rapid cooling to obtain high hardness and good wear resistance.
Temper at approximately 550 °C after quenching to balance hardness and toughness, reduce residual stress, and achieve a final hardness of 63–66 HRC.
ZEICIN Steel manufactures DF5 / W5Mo2Cr4V2Co in hot-rolled and hot-forged forms, ensuring a stable structure and reliable performance for tooling applications.
| Type | Specification（mm) | Surface Condition |
| Cold-drawn Round Steel | φ1-12 | Black/Centerless Surface |
| Hot-rolled Round Steel | φ12-60 | Turned Surface |
| Precision Forged Round Steel (Spray Forming) | φ60-300+ | Turned/Peeled Surface |
Different surface conditions affect appearance, dimensional accuracy, and machining allowance. The images below show common delivery options (actual products may vary by size and batch).
ZEICIN STEEL invests in R&D for high-speed steels and martensitic stainless steels. Our focus is on cleaner steel, more uniform carbide distribution, and stable heat-treatment response to support longer service life and better batch consistency.
Our company research and development team：Our company is one Member of the key project of “the 13th five-year plan ”of the National ministry of science and technology, Our company enjoys National government support and financial subsidies.
Together with Shanghai University and a Beijing-based steel research institute, we have developed a rapid-solidification electroslag remelting (RS ESR) process route. This process helps improve steel cleanliness and carbide uniformity, supporting longer tool life and more stable performance.
We work with Baosteel Group on spray forming technology. Our team supports process development and engineering validation for spray-formed HSS, helping meet high-performance material development and scale-up needs.
Yes. We are a factory. ZEICIN STEEL produces high-quality, cost-effective special steels, including stainless steel, tool & die steel, and high-speed steel. We also have our own import/export license, so we can serve overseas customers directly and support stable supply with batch traceability.
Yes. For first-time cooperation, we can provide a limited quantity of samples for verification (such as grade confirmation, machining trials, or heat-treatment evaluation). Samples can be shipped by international courier, and the courier cost is paid by the buyer. We value honest cooperation and look forward to a long-term win-win partnership.
Our common international payment methods include T/T and L/C. For trade terms, we can also support options such as DDU based on the order. The final payment method and terms can be confirmed according to your country/region, order value, and delivery method.
Our products use standard industrial packaging to ensure safe transportation. If you need custom packaging, please let us know when placing your order.
If the products are in stock, delivery usually takes 5–7 days.
If the products are not in stock, delivery time is about 30–40 days, depending on the order quantity.
