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Inox Steel India is a trusted manufacturer, supplier, and exporter of Tool Steel Round Bars in premium grades AISI D2, AISI H13, and AISI O1, supplied in accordance with ASTM A681 specifications.
Our tool steel round bars are widely used in tool rooms, die & mold manufacturing, automotive tooling, forging dies, cutting tools, and heavy industrial tooling, where hardness, wear resistance, and dimensional stability are critical.
With ready stock availability in annealed condition and precision-controlled sizes, Inox Steel India supports tool makers, OEMs, and export buyers across India, GCC, Middle East, Africa, Europe, and the Americas.
Tool steel round bars are high-carbon, alloyed steel bars specifically designed for tooling, cutting, forming, and die applications. These steels are engineered to maintain high hardness, edge retention, and resistance to wear and deformation, even under repeated stress.
At Inox Steel India, tool steel round bars are produced through controlled metallurgical processes to ensure uniform microstructure and predictable heat treatment response.
This process ensures tool steel round bars with consistent hardness potential and reliable performance during heat treatment.
These characteristics make tool steel round bars essential for dies, punches, molds, cutting blades, and industrial tooling components.
Inox Steel India supplies tool steel round bars in the following grades:
Applicable Standard:
ASTM A681
MASTER TECHNICAL DATA SHEET:
Tool Steel Round Bars
| Parameter | AISI D2 | AISI H13 | AISI O1 |
|---|---|---|---|
| Product Form | Solid Round Bar | Solid Round Bar | Solid Round Bar |
| Tool Steel Type | Cold Work Tool Steel | Hot Work Tool Steel | Oil Hardening Tool Steel |
| Standard | ASTM A681 | ASTM A681 | ASTM A681 |
| DIN / EN Equivalent | DIN 1.2379 | DIN 1.2344 | DIN 1.2510 |
| Manufacturing Process | Forged / Hot Rolled | Forged / Hot Rolled | Hot Rolled |
| Diameter Range (mm) | 6 – 350 mm | 6 – 400 mm | 6 – 300 mm |
| Standard Sizes (mm) | 8, 10, 12, 16, 20, 25, 32, 40, 50, 65, 80, 100 | Same as D2 | Same as D2 |
| Length | Random / Fixed / Cut-to-Length | Random / Fixed / Cut-to-Length | Random / Fixed / Cut-to-Length |
| Surface Finish | Black / Annealed | Black / Annealed | Black / Annealed |
| Density (g/cm³) | 7.70 | 7.80 | 7.85 |
| Carbon Content (%) | 1.40 – 1.60 | 0.32 – 0.45 | 0.85 – 1.00 |
| Chromium (%) | 11.0 – 13.0 | 4.75 – 5.50 | 0.40 – 0.60 |
| Molybdenum (%) | 0.70 – 1.20 | 1.10 – 1.75 | — |
| Vanadium (%) | 0.80 – 1.10 | 0.80 – 1.20 | — |
| Tensile Strength (MPa) | ≥ 1900 (Hardened) | ≥ 1800 (Hardened) | ≥ 1400 (Hardened) |
| Hardness (HRC) | 58 – 62 | 44 – 52 | 57 – 62 |
| Heat Treatment | Annealed / Hardened | Annealed / Hardened | Annealed / Oil Hardened |
| Wear Resistance | Excellent | Good | Good |
| Impact Toughness | Moderate | Excellent | Moderate |
| Hot Strength | Low | Very High | Low |
| Machinability (Annealed) | Fair | Good | Good |
| Typical Applications | Dies, Punches, Blades | Hot Dies, Molds | Cutting Tools, Knives |
| Testing | Chemical, Mechanical, UT | Chemical, Mechanical, UT | Chemical, Mechanical, UT |
| Certification | EN 10204 3.1 / 3.2 | EN 10204 3.1 / 3.2 | EN 10204 3.1 / 3.2 |
| HSN Code | 7228 | 7228 | 7228 |
| Export Suitability | Domestic & Export | Export | Export |
When selecting tool steel round bars, the following parameters are critical:
Type of Tooling Application:
D2 for cold work dies, H13 for hot work tooling, O1 for cutting and general-purpose tools.
Machining Requirements:
Annealed tool steel bars allow significantly easier machining before final heat treatment.
Inox Steel India maintains stock readiness and export documentation to support reliable global supply.
Tool steel round bars supplied by Inox Steel India are designed for applications where high hardness, wear resistance, dimensional stability, and toughness are critical. Each grade is chosen based on the specific tooling environment.
| Industry / Sector | Typical Applications | Preferred Grades |
|---|---|---|
| Die & Mold Manufacturing | Cold work dies, blanking dies, forming dies | D2 |
| Forging Industry | Hot forging dies, die holders | H13 |
| Tool Rooms | Punches, cutters, gauges | D2, O1 |
| Automotive Tooling | Stamping dies, trim tools | D2 |
| Plastic Molding | Mold cores, inserts | H13 |
| Cutting Tools | Knives, shear blades, general tools | O1 |
These applications demand consistent metallurgical quality, which is ensured through controlled production and inspection.
Inox Steel India supplies tool steel round bars in a comprehensive size range suitable for precision machining and heavy tooling applications.
Standard Diameter Range (mm)
6 mm, 8 mm, 10 mm, 12 mm, 16 mm, 20 mm, 25 mm, 32 mm, 40 mm, 50 mm, 65 mm, 80 mm, 100 mm and above up to 400 mm
Length Options
Surface Condition
Annealed condition allows ease of machining and dimensional control prior to final heat treatment.
The approximate weight of tool steel round bars can be calculated using the standard formula:
Weight (kg/m) = (D² × 0.006165)
Where D = Diameter in mm
This calculation is widely used for material estimation, tooling cost calculation, and logistics planning.
| Grade | Approx. Price INR/kg | Typical Use |
|---|---|---|
| D2 Tool Steel | ₹ 280 – ₹ 450 | Cold work dies, punches |
| H13 Tool Steel | ₹ 320 – ₹ 520 | Hot work dies, molds |
| O1 Tool Steel | ₹ 240 – ₹ 380 | Cutting tools, knives |
Prices are indicative and subject to change based on alloy surcharge and size.
Every tool steel round bar supplied by Inox Steel India undergoes rigorous inspection and testing to ensure suitability for tooling applications.
Quality Tests Conducted
Documentation Supplied
These controls ensure reliable performance during machining, hardening, and service life.
Inox Steel India is a dependable tool steel round bar manufacturer and supplier in India, supplying premium-grade tool steels for precision tooling and heavy industrial applications.
Our Core Strengths
Our focus is on consistent metallurgy, predictable heat treatment response, and long service life of tooling components.
| Industry | Application |
|---|---|
| Tool Rooms | Punches, gauges, cutters |
| Die & Mold | Blanking dies, forming dies |
| Automotive Tooling | Stamping and trim tools |
| Forging | Hot and cold forging dies |
| Plastic Molding | Mold cores and inserts |
| General Engineering | Industrial cutting tools |
Each industry is supported with technical guidance and dependable supply schedules.
All tool steel round bars are packed to ensure safe handling and damage-free delivery:
Export Destinations:
UAE, Saudi Arabia, Oman, Qatar, Nigeria, South Africa, Germany, Italy, USA, and other global markets.
Dispatch is arranged through JNPT (Mumbai), Mundra, and Hazira ports.
If you are searching for a tool steel round bar supplier near Alankar Cinema, Mumbai, Inox Steel India offers immediate availability, certified tool steel material, and nationwide as well as export delivery support.
Tool Steel Round Bars Manufacturer & Supplier in India – D2, H13, O1 | Inox Steel India
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in
+91 9930796690
Tool steel round bar prices typically range from ₹240 – ₹520 per kg, depending on grade and size. No, tool steel round bars are generally supplied in annealed condition for machining before final hardening. O1 tool steel is widely used for knives and cutting tools. The HSN code is 7228. Yes, we supply custom cut-to-length tool steel round bars as per tooling drawings. What is the price of tool steel round bars in India?
Are tool steel round bars supplied in hardened condition?
Which tool steel is suitable for cutting tools?
What is the HSN code for tool steel round bars?
Do you provide custom cut lengths for tooling applications?
Inox Steel India is a leading tool steel round bar manufacturer and supplier in India. D2, H13 & O1 tool steel round bars as per ASTM A681 with competitive price and certification.