M35 is a cobalt high-speed steel with about 5% cobalt. It keeps hardness at high temperature, so it works well in high-speed cutting and hot running conditions. Compared with common HSS grades, M35 offers better resistance to softening, strong wear resistance, and a more stable cutting edge for longer tool life.
Key Performance Benefits
High red hardness: cobalt helps M35 stay hard when hot and reduces softening at high speed.
Strong wear resistance: stable carbides support a longer-lasting cutting edge.
Good compressive strength and edge stability: helps reduce chipping and early failure in heavy or interrupted cutting.
Stable heat-treatment response: with the right process, it delivers consistent hardness and structure across batches.
| ZEICIN Grade | GB | AISI | JIS | DIN | Erasteel | Bohler | Hitachi |
| ZDF-M35 | W6Mo5Cr4V2Co5 | M35 | SKH55 | 1.3243 / S6-5-2-5 | EM35 | S705 | YXM4 |
| Elemnet | C | W | Mo | Cr | V | Co | Al | Mn | Si | S | P |
| Contene(%) | 0.87-0.95 | 5.90-6.70 | 4.70-5.20 | 3.80-4.50 | 1.70-2.10 | 4.50-5.00 | – | 0.15-0.40 | 0.20-0.45 | ≤0.03 | ≤0.03 |
Annealing softens the steel, removes internal stress, and improves machinability.
Quenching heats and then cools the steel quickly to build high hardness, red hardness, and wear resistance.
Tempering removes quench stress and balances hardness with toughness, while keeping hot hardness and wear resistance.
Annealing-Quenching-Tempering graph (HRC:63-65)
ZEICIN Steel is a professional manufacturer of M35 HSS, supplying products in various forms produced by hot rolling and hot forging. Bulk supply and customized size requirements are available upon request.
| 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.
