Purohit Steel is a leading Grade 1.2083 ESR Stockist and Exporter in India, supplying premium ESR-refined, high-chromium (~13%) stainless-type mould steel with verified chemical composition, mechanical properties and full traceability for mould makers, OEMs and tooling houses producing high-gloss, medical or food-contact plastic parts.
As an ISO-certified company established in 1965, we maintain ready stock of Grade 1.2083 ESR 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 1.2083 ESR Steel
- 2. Why Purohit Steel for 1.2083 ESR
- 3. Comparison: 1.2083 ESR vs 1.2085 vs VR Stainless
- 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 1.2083 ESR Steel?
Grade 1.2083 ESR (Werkstoffnummer 1.2083, chemical designation X40Cr14, also referenced as X42Cr13) is a high-chromium, stainless-type mould steel refined via Electro-Slag Remelting (ESR). The ESR process re-melts the steel through a slag bath under controlled conditions, removing non-metallic inclusions and producing a much cleaner, more homogeneous microstructure than conventionally melted 1.2083.
This refined structure makes 1.2083 ESR significantly better than standard-melt 1.2083 in toughness, homogeneity and mirror-polishing performance, which is why it is the preferred choice for high-end mould manufacturing where precision and surface quality are critical.
The grade is available pre-hardened at approximately 290-330 HB (30-34 HRC) for direct machining, or supplied annealed and later hardened up to 50-52 HRC for wear-critical cavity and core inserts. With roughly 13% chromium, it offers very good corrosion resistance in humid, water-cooled and chemically aggressive moulding environments.
Note: 1.2083 ESR is one of several corrosion-resistant grades Purohit Steel stocks — see the comparison table below for how it compares with 1.2085 and VR Stainless.
Why Purohit Steel for Grade 1.2083 ESR
- 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: 1.2083 ESR vs 1.2085 vs VR Stainless
Purohit Steel stocks more than one corrosion-resistant mould steel grade. The table below compares 1.2083 ESR against two related grades to help select the right material for the application.
| Factor | 1.2083 ESR (X40Cr14) | 1.2085 (X33CrS16) | VR Stainless |
|---|---|---|---|
| Chromium content | ~12.5-13.5% | ~15-17% | ~13-16% |
| Refinement | ESR (Electro-Slag Remelted) — ultra-clean, homogeneous | Standard melt | Standard melt, advanced processing |
| Supply hardness | 290-330 HB (or annealed, hardenable to 50-52 HRC) | 280-325 HB | 30-34 HRC |
| Polishability | Superior, mirror/optical-grade | Moderate | Good |
| Corrosion resistance | Very good | Good | Good to very good |
| Best suited for | High-gloss, transparent, medical/optical moulds | Humid/water-cooled moulds, general corrosive-plastic tooling | Heavy water-cooling channels, continuous production |
Grade 1.2083 ESR Chemical Composition
Composition as per DIN 17350 (typical mill range, weight %):
| Element | Symbol | Composition (%) |
|---|---|---|
| Carbon | C | 0.38 - 0.45 |
| Silicon | Si | 1.00 max |
| Manganese | Mn | 1.00 max |
| Chromium | Cr | 12.50 - 13.50 |
| Phosphorus | P | 0.030 max |
| Sulphur | S | 0.030 max |
| Iron | Fe | Balance |
The ESR process does not change the nominal chemistry above, but it materially improves cleanliness — reducing sulphide and oxide inclusions that would otherwise show up as pits or streaks after high polishing.
Mechanical Properties of Grade 1.2083 ESR
Typical values; 1.2083 ESR can be supplied pre-hardened (ready to machine) or annealed for later hardening:
| Property | Typical Value |
|---|---|
| Hardness (pre-hardened supply condition) | 290 - 330 HB (approx. 30 - 34 HRC) |
| Hardness (annealed supply condition) | 235 HB max |
| Hardness (fully hardened & tempered) | Up to 50 - 52 HRC |
| Tensile Strength (Rm, pre-hardened) | 950 - 1050 MPa |
| Yield Strength (Rp0.2, pre-hardened) | 700 - 800 MPa |
| Elongation at Break (A5) | 10 - 14% |
| Impact Toughness (Charpy V, longitudinal) | 15 - 20 J |
| Modulus of Elasticity (E) | ~215 GPa |
Values are typical and can vary with section size, mill batch and the specific heat-treated condition ordered. Mill test certificates (EN 10204 2.2 / 3.1) are available on request.
Physical & Thermal Properties
| Property | Value |
|---|---|
| Density | ~7.70 g/cm³ |
| Thermal Conductivity (room temp.) | ~20 - 24 W/(m·K) |
| Coefficient of Thermal Expansion (20-200°C) | ~10.5 - 11.0 × 10-6 /K |
| Specific Heat Capacity | ~460 J/(kg·K) |
| Electrical Resistivity (room temp.) | ~0.60 µΩ·m |
As with other high-chromium grades, thermal conductivity is markedly lower than base P20 steel — factor this into mould cooling-channel design.
Equivalent International Grades
| Country / Standard | Designation |
|---|---|
| Germany (Werkstoffnummer, DIN 17350) | 1.2083 / X40Cr14 (also referenced as X42Cr13) |
| USA (ASTM A681) | 420 Modified |
| Japan (JIS G4303 / G4403) | SUS420J2 |
| China (GB/T 1220, closest equivalent) | 4Cr13 |
1.2083 ESR is related to, but distinct from, 1.2085 and VR Stainless — refer to the comparison table above before substituting grades.
Heat Treatment Guidelines
| Process | Guideline |
|---|---|
| Supply condition | ESR-refined, pre-hardened 290-330 HB (ready to machine) or annealed 235 HB max (for later full hardening) |
| Stress relieving (after heavy machining) | 600-650°C, hold approx. 2 hrs, furnace or air cool |
| Softening / annealing | Heat to 750-800°C, cool slowly in furnace (≤20°C/hr) to 600°C, then air cool |
| Hardening (for wear-critical inserts) | Preheat 600-650°C, austenitize at 1000-1050°C, hold 20-30 min, oil or air quench — yields approx. 50 HRC as-quenched |
| Tempering | 200-300°C for maximum hardness (~50-52 HRC); higher tempering temperatures (550-600°C) give a softer, tougher pre-hardened-equivalent condition |
Available Forms & Sizes
- Round Bars
- Flat Bars / Plates
- 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 blocks can be supplied close to finished dimensions.
Machining & Selection Notes
- Cutting tools: Being a higher-chromium grade, 1.2083 ESR machines slower than P20-family steel; coated carbide tooling with adequate coolant and moderate cutting speeds is recommended.
- Polishing: The ESR-refined microstructure is what enables mirror and optical-grade finishes — always specify "ESR" when ordering if high polish is required, since standard-melt 1.2083 will not achieve the same result.
- EDM finishing: Both the pre-hardened and fully hardened conditions are well suited to EDM cavity sinking; re-polish after EDM to remove the recast layer for best gloss.
- Welding / repair: Weldability is limited due to the high chromium content; preheat and post-weld stress relief are recommended where repair is unavoidable.
- Grade selection: Choose 1.2083 ESR where corrosion resistance must be combined with the highest achievable surface finish; use 1.2085 for a more cost-effective, general corrosion-resistant option — see the comparison table above.
Applications of Grade 1.2083 ESR Steel
1.2083 ESR is specified wherever a mould must combine corrosion resistance with an exceptional surface finish. Its ESR-refined cleanliness makes it the standard choice for optical and transparent-part tooling.
- Transparent plastic moulds (lenses, covers, display parts)
- Medical and cosmetic industry moulds
- High-gloss injection moulds
- Blow moulds for food and packaging applications
- Moulds operating in humid or chemically corrosive environments
- Precision mould components and inserts
- Mirror-finish and textured tooling applications
Grade 1.2083 ESR for Optical & High-Gloss Tooling
Because ESR refining removes the inclusions that cause pitting during high polishing, 1.2083 ESR is the default choice where a mould cavity must reach optical or mirror-grade (SPI A1/A2) finish.
Medical & Food-Contact Industry
1.2083 ESR is widely used for medical device and food-contact packaging moulds where hygiene, corrosion resistance and repeatable dimensional accuracy through cleaning cycles are essential.
Industries We Serve
- Medical & healthcare product manufacturing
- Optical & consumer electronics moulding
- Packaging manufacturing
- Food-contact component manufacturing
- Cosmetic & personal care product moulding
- Engineering & tooling workshops
Authorized Stockist
Grade 1.2083 ESR Supply Locations Across India
We supply Grade 1.2083 ESR 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.
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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 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.