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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.
What Are Tool Steel Round Bars & How Are They Manufactured?
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.
Manufacturing Process Overview
This process ensures tool steel round bars with consistent hardness potential and reliable performance during heat treatment.
Key Advantages of Tool Steel Round Bars from Inox Steel India
These characteristics make tool steel round bars essential for dies, punches, molds, cutting blades, and industrial tooling components.
Grades & Standards Available
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 |
Key Factors to Consider When Selecting Tool Steel Round Bars
When selecting tool steel round bars, the following parameters are critical:
Global & Indian Demand Overview
India:
Strong demand from tool rooms, die & mold manufacturers, automotive tooling units, and forging die manufacturers in Mumbai, Pune, Ahmedabad, Faridabad, Coimbatore, and Chennai.
GCC & Middle East:
Used for forging dies, hot work tooling, and industrial molds.
Europe & Americas:
Widely used in precision tooling, cutting tools, and heavy-duty industrial dies requiring ASTM-compliant tool steel.
Inox Steel India supports these markets with ready stock, consistent quality, and export-compliant documentation.
Applications of Tool Steel Round Bars
Tool steel round bars supplied by Inox Steel India are designed for applications where high hardness, wear resistance, dimensional stability, and toughness are critical. These materials are extensively used in tool rooms, die & mold manufacturing, and precision industrial tooling.
Application-Wise Usage
| 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 and predictable heat treatment response, which is ensured through controlled production and inspection.
Tool Steel Round Bar Size Range & Standard Dimensions
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.
Tool Steel Round Bar Weight Calculation
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.
Tool Steel Round Bar Price – Indicative Range
Tool steel prices vary based on grade, diameter, and alloy composition. Below is an indicative price range for reference.
| 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.
HSN / HS Code for Tool Steel Round Bars
Applicable for tool steel and alloy steel bars used in domestic and export trade.
Testing & Quality Assurance
All tool steel round bars supplied by Inox Steel India undergo 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.
Why Choose Inox Steel India for Tool Steel Round Bars
Inox Steel India is a dependable tool steel round bar manufacturer and supplier in India, supplying premium-grade tool steels for precision tooling, die & mold manufacturing, and heavy industrial tooling applications. With consistent stock of AISI D2, AISI H13, and AISI O1 round bars, we support tool rooms and OEMs with reliable, certified material.
Our Core Strengths
Our focus is on consistent metallurgy, predictable heat treatment response, and long service life of tooling components.
Industries We Serve
| 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.
Packaging & Export Readiness
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
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?