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Grades: D2, H13, O1 | Precision Tooling & Die Steel Square Bars
Inox Steel India is a trusted manufacturer, supplier, stockist, and exporter of tool steel square bars in India, supplying premium-grade D2, H13, and O1 tool steel square bars to tooling, die-making, mould manufacturing, forging, and precision engineering industries. These tool steel square bars are engineered for applications where wear resistance, hardness retention, dimensional stability, and tool life are critical.
Tool steel square bars differ fundamentally from carbon and alloy steel square bars. They are specially formulated with high carbon and alloying elements to deliver controlled hardness, excellent edge retention, and resistance to deformation under mechanical and thermal stress. This makes them the preferred choice for dies, punches, moulds, cutting tools, blades, and forming tools.
All tool steel square bars supplied by Inox Steel India conform to ASTM A681, AISI, and DIN standards, ensuring consistent metallurgy and predictable performance during machining and heat treatment.
A tool steel square bar is a solid square-section bar manufactured from specially alloyed steel designed to be heat treated to high hardness levels. Tool steels are developed to perform reliably in applications involving:
The square cross-section provides flat reference surfaces and torsional stability, which is essential for precision machining and tool fabrication. Tool steel square bars are typically supplied in annealed condition, allowing easy machining before final hardening and tempering.
Inox Steel India follows controlled metallurgical processes to ensure tool steel square bars meet strict tooling requirements.
Manufacturing Process Overview:
This controlled process ensures dimensional accuracy, uniform hardness response, and consistent tool performance.
Tool steel square bars offer performance advantages that are essential for tooling and die-making applications:
These properties make tool steel square bars indispensable in industrial tooling and manufacturing environments.
Inox Steel India supplies multiple grades of tool steel square bars to suit different tooling applications:
🔹 D2 Tool Steel Square Bars
High carbon, high chromium cold work tool steel with excellent wear resistance and edge retention. Commonly used for dies, punches, shear blades, and cutting tools.
🔹 H13 Tool Steel Square Bars
Hot work tool steel offering excellent toughness and resistance to thermal fatigue. Ideal for die casting dies, hot forging dies, and moulds exposed to high temperatures.
🔹 O1 Tool Steel Square Bars
Oil-hardening cold work tool steel known for good machinability and sharp cutting edges, widely used for knives, gauges, and general-purpose tooling.
MASTER TECHNICAL DATASHEET – TOOL STEEL SQUARE BARS
| Parameter | D2 Tool Steel | H13 Tool Steel | O1 Tool Steel |
|---|---|---|---|
| Material Category | High Carbon, High Chromium Cold Work Tool Steel | Hot Work Tool Steel | Oil Hardening Cold Work Tool Steel |
| AISI / DIN Equivalent | AISI D2 / 1.2379 | AISI H13 / 1.2344 | AISI O1 / 1.2510 |
| Standard | ASTM A681 | ASTM A681 | ASTM A681 |
| Carbon Content (%) | 1.40 – 1.60 | 0.32 – 0.45 | 0.85 – 1.00 |
| Key Alloying Elements | Cr ~11–13%, Mo, V | Cr ~5%, Mo, V | Mn, Cr, W (low) |
| Density | 7.70 g/cm³ | 7.80 g/cm³ | 7.85 g/cm³ |
| Wear Resistance | Very High | Medium | High |
| Toughness | Medium | Very High | Medium |
| Heat Resistance | Medium | Excellent | Medium |
| Hardenability | Excellent | Excellent | Very Good |
| Typical Hardness (HRC) | 58 – 62 HRC | 44 – 52 HRC (hot work) | 57 – 62 HRC |
| Machinability (Annealed) | Fair | Good | Good |
| Weldability | Poor | Fair | Poor |
| Heat Treatment | Air Hardened | Air Hardened | Oil Hardened |
| Supply Condition | Annealed / Rough Machined | Annealed / Rough Machined | Annealed / Rough Machined |
| Surface Finish | Black / Ground | Black / Ground | Black / Ground |
| Size Range (Square) | 10 mm – 150 mm | 10 mm – 150 mm | 10 mm – 120 mm |
| Length | Random / Fixed / Cut Length | Random / Fixed / Cut Length | Random / Fixed / Cut Length |
| Testing | Chemical, Hardness | Chemical, Hardness | Chemical, Hardness |
| Certification | EN 10204 3.1 | EN 10204 3.1 | EN 10204 3.1 |
| HSN / HS Code | 7228.40.00 | 7228.40.00 | 7228.40.00 |
| Typical Applications | Dies, Blades, Punches, Shear Tools | Die Casting Dies, Hot Forging Dies, Moulds | Knives, Gauges, Punches, General Tooling |
Before selecting a tool steel square bar, engineers and toolmakers should evaluate:
Choosing the correct grade ensures maximum tool life, consistent performance, and reduced tooling costs.
This section provides toolmaker-focused technical and commercial clarity for sourcing tool steel square bars—covering standard sizes, weight calculations, indicative pricing, testing, and application mapping for dies, moulds, and precision tools.
Inox Steel India supplies tool steel square bars in standard industry sizes and custom cut lengths suitable for tooling, die-making, and mould manufacturing.
Standard Square Bar Sizes (mm)
10 | 12 | 16 | 20 | 22 | 25 | 30 | 32 | 35 | 40 | 45 | 50 | 60 | 65 | 70 | 75 | 80 | 100 | 120 | 150
Length: Random (3–6 m) or fixed / cut lengths
Tolerance: As per ASTM A681 / DIN standards
Finish Options: Hot Rolled (Black), Ground (on request)
Commonly requested sizes include 20mm, 25mm, 40mm, and 50mm tool steel square bars for punches, dies, and mould bases.
The following steel square bar weight chart supports BOQ preparation and cost estimation.
(Density considered: ~7.75 g/cm³)
| Square Size (mm) | Weight (kg/m) |
|---|---|
| 10 × 10 | 0.78 |
| 12 × 12 | 1.12 |
| 16 × 16 | 2.00 |
| 20 × 20 | 3.10 |
| 25 × 25 | 4.85 |
| 30 × 30 | 6.98 |
| 40 × 40 | 12.40 |
| 50 × 50 | 19.40 |
| 65 × 65 | 32.80 |
| 75 × 75 | 43.90 |
| 100 × 100 | 77.50 |
Addresses buyer queries such as:
steel square bar weight
tool steel square bar weight per meter
square bar steel weight calculation
Prices vary based on grade, size, finish (ground vs black), and supply condition (annealed). Below is an indicative tool steel square bar price range for reference.
Indicative Price Range (INR/kg – India)
| Grade | Approx. Price / Kg (INR) | Typical Use |
|---|---|---|
| D2 Tool Steel | ₹ 260 – ₹ 380 | Dies, punches, shear blades |
| H13 Tool Steel | ₹ 320 – ₹ 450 | Die casting & hot forging dies |
| O1 Tool Steel | ₹ 220 – ₹ 320 | Knives, gauges, general tooling |
Prices are indicative and depend on size, ground finish, and order volume.
HSN Code (India): 7228.40.00
HS Code (Export): 7228.40
Applicable to tool steel bars and rods, hot rolled or forged, used for domestic billing and export documentation.
All tool steel square bars supplied by Inox Steel India are tested to meet tooling-grade performance requirements.
Standard Tests Conducted:
Certification:
Tool steel square bars are used where cutting, forming, or shaping performance is critical.
Toolmakers and manufacturers choose Inox Steel India for quality assurance, material reliability, and application-focused support.
Key Advantages:
Our goal is to ensure consistent tool life, dimensional stability, and reduced downtime for every customer.
| Industry | Application | Preferred Grade |
|---|---|---|
| Tool Rooms & Die Makers | Punches, dies, shear tools | D2 |
| Die Casting Industry | Hot dies, moulds | H13 |
| Forging Industry | Hot forging dies | H13 |
| Plastic Moulding | Mould bases, inserts | H13 |
| Precision Tooling | Gauges, cutting tools | O1 |
| General Manufacturing | Knives, fixtures | O1 |
All tool steel square bars are packed to protect surface quality and dimensional accuracy during transit.
Packing Standards:
Export Markets: UAE, Saudi Arabia, Oman, Africa, Southeast Asia, Europe
Domestic Supply: Mumbai, Pune, Ahmedabad, Chennai, Bengaluru
Whether you need D2 for punches, H13 for hot work dies, or O1 for precision tools, Inox Steel India delivers certified quality, competitive pricing, and reliable supply.
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in
+91 9930796690
D2 tool steel is ideal for cold work dies due to excellent wear resistance. H13 tool steel is recommended for hot work due to its thermal fatigue resistance. Yes, all tool steel square bars are supplied in annealed condition for machining. The HSN code is 7228.40.00. Yes, ground and precision-finished square bars are available on request. Yes, every supply includes EN 10204 3.1 Mill Test Certificates. Which tool steel is best for cold work dies?
Which grade is suitable for hot forging and die casting?
Do you supply tool steel in annealed condition?
What is the HSN code for tool steel square bars?
Can you supply ground tool steel square bars?
Do you provide test certificates?
Inox Steel India supplies tool steel square bars in D2, H13 & O1 grades. Get latest price per kg, sizes, weight chart & certified stock in India.