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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 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.
This controlled process ensures dimensional accuracy, uniform hardness response, and consistent tool performance.
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.
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 cut lengths
Tolerance: As per ASTM A681 / DIN standards
Finish: Hot Rolled (Black), Ground (on request)
| 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 |
| Grade | Price (₹/kg) | Typical Use |
| D2 | ₹260 – ₹380 | Dies, punches |
| H13 | ₹320 – ₹450 | Hot work dies |
| O1 | ₹220 – ₹320 | Knives & gauges |
HSN Code (India): 7228.40.00
HS Code (Export): 7228.40
Certification: EN 10204 3.1 Mill Test Certificate
Third-party inspection: SGS / TUV / BV (on request)
| Industry | Application | Preferred Grade |
| Tool Rooms & Die Makers | Punches, dies | D2 |
| Die Casting | Hot dies | H13 |
| Forging | Forging dies | H13 |
| Plastic Moulding | Mould bases | H13 |
| Precision Tooling | Gauges, knives | O1 |
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.
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?