Purohit Steel is a leading Grade M35 Stockist and Exporter in India, supplying premium cobalt-bearing high speed steel (AISI M35 / DIN 1.3243 / JIS SKH55) with verified chemical composition, mechanical properties and full traceability for cutting tool manufacturers and precision engineering workshops.
As an ISO-certified company established in 1965, we maintain ready stock of Grade M35 in round bar, flat bar and block form, with in-house bandsaw cutting, machining, grinding and EDM support for fast turnaround across India and export markets.
Table of Contents
- 1. What is Grade M35 Steel
- 2. Why Purohit Steel for M35
- 3. Comparison: M35 vs M2 vs M42
- 4. Chemical Composition
- 5. Mechanical Properties
- 6. Physical & Thermal Properties
- 7. Equivalent International Grades
- 8. Heat Treatment Guidelines
- 9. Available Forms & Sizes
- 10. Machining & Selection Notes
- 11. Applications & Uses
- 12. Industries We Serve
- 13. Related Products
- 14. Authorized Stockist Brands
- 15. Cities We Supply in India
- 16. Our Services
- 17. Frequently Asked Questions
- 18. About Purohit Steel
- Our Certifications
- Countries We Export Worldwide
- Export Packaging & Shipping
- Quality Inspection & Testing
- Latest Price List
- MOQ & Payment Terms
- People Also Search For
What is Grade M35 Steel?
Grade M35 (DIN Werkstoffnummer 1.3243, JIS SKH55) is a cobalt-bearing molybdenum high speed steel, essentially the M2 composition with approximately 5% cobalt added. The cobalt raises the temper hardness, hot hardness and wear resistance of the steel compared with plain M2, allowing higher cutting speeds and better performance on tougher work materials.
M35 is normally supplied in the annealed condition (max. 260 HB) for ease of machining, then hardened and tempered by the tool maker. In the hardened & tempered condition it typically reaches 64-66 HRC and retains useful cutting hardness at working temperatures up to approximately 620°C — higher than cobalt-free M2.
M35 is often described as a direct upgrade from M2 for machining stainless steels and other tough alloy materials, offering longer tool life and higher permissible cutting speeds at a moderate cost premium.
Note: for the highest available hardness and red-hardness in this family, see M42 in the comparison table below.
Why Purohit Steel for Grade M35
- Ready Stock: Round bar, flat bar and block sizes held in inventory for immediate dispatch
- ISO-Certified Quality: Documented quality management since 1965
- Authorized Stockist: Sourced through globally reputed manufacturers, including NLMK Verona and SeAH CSS
- Value-Added Machining: In-house bandsaw cutting, precision machining, grinding, drilling, gun drilling, EDM and wire-cut
- Technical Support: Assistance with grade selection, heat treatment guidance and equivalence mapping
- Pan-India & Export Supply: Warehousing in Vasai with a sales outlet in Mumbai, serving customers across India and international markets
- Export-Ready Packaging: Palletised, moisture-protected packing suitable for both domestic transport and export shipment
Comparison: M35 vs M2 vs M42
M35 sits between cobalt-free M2 and high-cobalt M42 in Purohit Steel's high speed steel range. The table below compares all three so you can weigh hardness, red-hardness and cost against your machining requirement.
| Factor | M35 / 1.3243 | M2 / 1.3343 | M42 / 1.3247 |
|---|---|---|---|
| Cobalt content | ~5% | None | ~8% |
| Hardness (hardened & tempered) | 64-66 HRC | 62-65 HRC | 66-70 HRC |
| Red-hardness (approx. working temp.) | Up to ~620°C | Up to ~600°C | Up to ~650°C |
| Toughness | Good | Highest of the three | Lower (more brittle at highest hardness) |
| Best suited for | Machining stainless & alloy steels, heavier interrupted cuts | General-purpose drills, mills, taps, everyday cutting tools | Premium high-temperature finishing tools for superalloys, hardened & stainless steel |
| Relative cost | Medium | Lowest | Highest |
Grade M35 Chemical Composition
Composition as per DIN EN ISO 4957 / ASTM A600 M35 (typical mill range, weight %):
| Element | Symbol | Composition (%) |
|---|---|---|
| Carbon | C | 0.85 - 0.95 |
| Silicon | Si | 0.20 - 0.45 |
| Manganese | Mn | 0.15 - 0.40 |
| Chromium | Cr | 3.75 - 4.50 |
| Molybdenum | Mo | 4.75 - 5.50 |
| Vanadium | V | 1.75 - 2.20 |
| Tungsten | W | 5.50 - 6.75 |
| Cobalt | Co | 4.50 - 5.00 |
| Phosphorus | P | 0.030 max |
| Sulphur | S | 0.030 max |
| Iron | Fe | Balance |
Mechanical Properties of Grade M35
Typical values across the common supply and heat-treated conditions:
| Property | Typical Value |
|---|---|
| Hardness (annealed, supply condition) | Max. 260 HB |
| Hardness (hardened & tempered) | 64 - 66 HRC |
| Red-hardness | Retains cutting hardness up to approx. 620°C |
| Modulus of Elasticity (E) | ~207 GPa |
Values are typical and depend on final hardening/tempering parameters chosen by the tool maker. Mill test certificates (EN 10204 2.2 / 3.1) are available on request.
Physical & Thermal Properties
| Property | Value |
|---|---|
| Density | ~8.14 g/cm³ |
| Thermal Conductivity (room temp.) | ~29 W/(m·K) |
| Coefficient of Thermal Expansion (20-200°C) | ~11 - 12 × 10-6 /K |
| Specific Heat Capacity | ~460 J/(kg·K) |
Equivalent International Grades
| Country / Standard | Designation |
|---|---|
| USA (AISI / SAE, ASTM A600) | M35 |
| Germany (Werkstoffnummer, DIN EN ISO 4957) | 1.3243 (HS6-5-2-5) |
| Japan (JIS G4403) | SKH55 |
| USA (UNS) | T11235 |
M35 is essentially M2 with cobalt added — see the comparison table above for how it compares against M2 and the higher-cobalt M42.
Heat Treatment Guidelines
| Process | Guideline |
|---|---|
| Supply condition | Annealed, max. 260 HB — machinable with standard tooling |
| Soft annealing | 850-900°C, slow furnace cool |
| Hardening (austenitizing) | 1180-1230°C, short soak, quench in oil, salt bath or air depending on furnace type |
| Tempering | 560°C or higher, at least two cycles of 1 hour minimum each, air cool between tempers — achieves 64-66 HRC via secondary hardening |
| Stress relieving (after heavy machining, pre-hardening) | 650-700°C, hold, furnace or air cool |
Available Forms & Sizes
- Round Bars
- Flat Bars
- Blocks
- Custom sizes cut to drawing via in-house bandsaw cutting
Material is machined, ground, drilled and finished in-house through our precision machining, grinding, drilling, gun drilling, EDM and wire-cut facilities, so tooling blanks can be supplied close to finished dimensions.
Machining & Selection Notes
- Machining: M35 machines slightly harder than M2 in the annealed condition due to cobalt content; hardening and tempering are carried out after final shaping of the tool.
- Multiple tempering: As with M2, M35 requires at least two tempering cycles to transform retained austenite and reach full service hardness.
- Grinding: Use adequate coolant when grinding hardened M35 to avoid grinding burn on the cutting edge.
- Grade selection: Choose M35 when M2 does not provide sufficient tool life on stainless or alloy steel; step up to M42 for the highest available red-hardness on premium finishing tools — see the comparison table above.
Applications of Grade M35 Steel
M35 is specified wherever M2 tool life is insufficient, particularly when machining stainless steel and other tough, heat-generating work materials.
- Drills, taps and reamers for stainless & alloy steel
- Milling cutters and end mills
- Gear cutters and broaches
- Shearing and slitting blades
- Profile cutting knives
- Extrusion tooling
- Mould components requiring higher wear resistance than M2
- General precision machining tools in demanding conditions
M35 for Stainless & Alloy Steel Machining
M35 is the standard step-up from M2 when tool life on stainless steel, work-hardening alloys or interrupted cuts becomes a limiting factor in production.
Mould & Tooling Applications
In mould and die making, M35 is used for inserts and wear components subjected to higher thermal and abrasive loads than standard M2 can reliably withstand.
Industries We Serve
- Cutting tool manufacturing
- Stainless steel fabrication & machining
- Automotive machining
- Mould & die making
- Aerospace component machining
- Precision engineering & machine tools
Authorized Stockist
Grade M35 Supply Locations Across India
We supply Grade M35 steel across major industrial cities including Mumbai, Pune, Khopoli, Nashik, Aurangabad, Navi Mumbai, Palghar, Umbergaon, Vapi, Valsad, Daman, Vadodara, Ahmedabad, Rajkot, Hyderabad, Bangalore, Chennai, Cochin, Delhi, Gurgaon, Manesar and Sonipat — as well as to export markets.
Our Steel Products
Our Services
Frequently Asked Questions
About Purohit Steel
Purohit Steel was established in 1965 by Shree Bherumalji Rajpurohit, a visionary in metallurgy. Over the decades, we have built a strong reputation as a trusted stockist and exporter of tool steel, plastic mould steel and engineering steel products across India.
As an ISO-certified company, we source premium materials from globally reputed manufacturers and operate a modern warehousing facility in Vasai along with a sales outlet in Mumbai, enabling efficient storage, fast processing and timely delivery across India and export markets.
With decades of relationships with tool & die manufacturers and a customer-focused approach, Purohit Steel continues to deliver reliable, technically supported steel solutions for the cutting tool and mould-making industry.
Read more about Purohit Steel, view our certifications, or get in touch with our technical sales team.
Our Certifications
Purohit Steel operates as an ISO-certified company, backed by documented quality management, safety and compliance certifications that support reliable supply to domestic and export customers.
View all certificates in detail on our Certifications page.
Countries We Export Worldwide
Beyond India, Purohit Steel exports tool & mould steel grades to customers across the following countries and regions:
| Export Destinations | |||||
|---|---|---|---|---|---|
| UAE | Saudi Arabia | Oman | Bangladesh | Sri Lanka | Nepal |
| Vietnam | Thailand | Indonesia | Kenya | Nigeria | South Africa |
For export enquiries and destination-specific documentation, please contact our sales team.
Export Packaging & Shipping
Bars, flats and blocks are packed to withstand handling, transit and marine shipment, whether for domestic dispatch or export orders.
- Palletised and strapped packing for round bars, flat bars and blocks
- Moisture-protected wrapping to prevent surface corrosion in transit
- Seaworthy export packing with clear shipping marks and material identification
- Documentation support including packing lists, invoices and mill test certificates for customs clearance
- Shipment by road, rail or sea freight as per order requirement and destination
Quality Inspection & Testing
Every batch held in our stock is checked through documented inspection procedures before dispatch, so mould makers and OEMs receive material with verified, traceable quality.
- Chemical composition verification against mill certificates
- Hardness testing (Brinell / Rockwell) on received stock
- Dimensional inspection as per standard bar and block tolerances
- Visual and surface defect inspection
- EN 10204 2.2 / 3.1 mill test certificates provided on request
- Third-party inspection coordination available for export orders
Full material traceability is maintained from incoming stock through to dispatch for every order.
Latest Price List
Pricing depends on section size, quantity, form (round bar / flat bar / block) and current raw material rates. Indicative guidance is below — contact us for a firm, up-to-date quotation.
| Form | Typical Price Basis |
|---|---|
| Round Bar | Per Kg, based on diameter & length — contact for latest rate |
| Flat Bar / Plate | Per Kg, based on thickness & size — contact for latest rate |
| Block (cut to size) | Per Kg / Per Piece, based on drawing — contact for latest rate |
Prices are subject to change with raw material and freight costs. Share your required size and quantity via the quotation form or WhatsApp for the latest price.
MOQ & Payment Terms
Minimum Order Quantity: Flexible MOQ depending on size and form — from small trial quantities for tooling houses up to bulk orders for OEMs, subject to confirmation at enquiry stage.
Payment Terms: Advance payment / part-advance with balance before dispatch for domestic orders; T/T (bank transfer) or Letter of Credit (LC) for export orders, depending on order value and destination.