Manufacturer, Supplier & Exporter of D2 Tool Steel Round Bar
D2 Tool Steel Round Bar is one of the most widely used high-carbon, high-chromium cold-work tool steels known for its excellent wear resistance, high hardness, and dimensional stability. Riddhi Siddhi Impex is a leading manufacturer and supplier of premium-quality D2 Tool Steel Round Bars, trusted by industries that demand superior durability and outstanding tooling performance. This grade is particularly valued for its ability to withstand abrasive environments, making it suitable for cutting, forming, and industrial die applications..
As a top supplier of D2 Tool Steel Round Bars in India, Riddhi Siddhi Impex offers products designed to meet both national and international quality standards. D2 steel contains around 12% chromium, making it a semi-stainless tool steel with improved corrosion resistance compared to traditional carbon tool steels. This unique combination makes D2 a preferred choice for industrial tooling solutions where long tool life and precision are essential..
Our D2 Tool Steel Round Bars are manufactured using advanced production techniques such as forging, heat treatment, and precision machining to ensure exceptional hardness levels and uniform structure. They are available in a wide range of diameters and lengths to meet the needs of various industries such as automotive, aerospace, machinery manufacturing, die making, and metal stamping operations...
Riddhi Siddhi Impex supplies D2 Tool Steel Round Bars across multiple Indian domestic cities including Mumbai, Delhi, Bengaluru (Bangalore), Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru (Mysore), Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, Vilayat, Somnath, Dahej, Narmada, Navsari, Valsad, Rajpipla, and other major industrial hubs. Our strong supply chain ensures timely delivery and consistent stock availability...
D2 Tool Steel Round Bar is especially suitable for high-load and high-impact applications due to its deep-hardening capability and exceptional wear resistance. This material maintains high hardness even after repeated use, making it ideal for manufacturing shear blades, punches, dies, slitters, industrial knives, cutting tools, and automotive tooling components. Its superior abrasion resistance significantly reduces downtime and maintenance frequency..
D2 Tool Steel Round Bar — Specification & Data
Manufacturer / Supplier: Riddhi Siddhi Impex — domestic stock & supply across major Indian cities including Mumbai, Delhi, Bengaluru (Bangalore), Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru (Mysore), Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, Vilayat, Somnath, Dahej, Narmada, Ankleshwar, Navsari, Valsad, Rajpipla. Request Mill Test Certificate (MTC) with each shipment.
1. Specification (Typical / Commercial Delivery)
| Parameter | Typical Value / Notes |
|---|---|
| Grade | D2 (Cold-work, high-carbon, high-chromium tool steel) |
| Common designation | AISI D2 / D2 Tool Steel |
| Product form | Round bar (ground/turned/bright/bar stock), billets and pre-machined blanks |
| Typical diameters | 6 mm — 200 mm (stock); larger sizes on request |
| Typical finishes | Annealed / normalized / hardened & tempered / ground finish |
| Typical hardness (annealed) | ~180–240 HB (annealed condition) |
| Typical hardness (hardened & tempered) | ~55–62 HRC (application dependent) |
| Density | ≈ 7.70 – 7.85 g/cm³ |
| Common standards | ASTM A681, ISO 4957, EN & national tool-steel specifications — specify required standard on order |
2. Chemical Composition (Typical ranges, wt. %)
| Element | Typical Range (wt. %) |
|---|---|
| Carbon (C) | 1.40 – 1.60 |
| Chromium (Cr) | 11.0 – 13.0 |
| Molybdenum (Mo) | 0.70 – 1.20 |
| Vanadium (V) | 0.10 – 0.50 |
| Manganese (Mn) | ≤ 0.60 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.03 |
| Sulfur (S) | ≤ 0.03 |
| Iron (Fe) | Balance |
Composition limits may vary slightly by specification and manufacturer—always request the supplier MTC / certificate for exact batch chemistry.
3. Mechanical Properties (Typical ranges — values vary with heat treatment)
| Property | Typical Value / Range |
|---|---|
| Hardness (annealed) | ~180 – 240 HB |
| Hardness (hardened & tempered) | ~55 – 62 HRC (typical working range) |
| Ultimate Tensile Strength (UTS) | ~900 – 1400 MPa (condition dependent) |
| Yield Strength | ~650 – 1200 MPa (condition dependent) |
| Elongation | ~6 – 15% (depends on heat treatment) |
| Wear resistance | Very high (excellent abrasion resistance due to high C & Cr carbides) |
| Dimensional stability | Good when properly heat treated (low distortion for precision dies) |
4. Dimension & Weight Chart — Round Bar (Nominal)
Density used for weight calculation: 7.78 g/cm³. Weight per metre = cross-sectional area (mm²) × density / 1,000.
| Diameter (mm) | Area (mm²) | Weight (kg/m) |
|---|---|---|
| 6 | 28.274 | 0.220 |
| 8 | 50.265 | 0.392 |
| 10 | 78.540 | 0.611 |
| 12 | 113.097 | 0.880 |
| 16 | 201.062 | 1.565 |
| 20 | 314.159 | 2.445 |
| 25 | 490.874 | 3.819 |
| 30 | 706.858 | 5.499 |
| 40 | 1256.637 | 9.776 |
| 50 | 1963.495 | 15.282 |
| 75 | 4417.865 | 34.360 |
| 100 | 7853.982 | 61.055 |
Weights rounded to three decimals. For precise ordering and transport calculations, request supplier-confirmed weights including tolerances and cutting waste.
5. Equivalent Grades & Common Standards
| Context | Equivalent / Reference |
|---|---|
| AISI / SAE | D2 (AISI designation) |
| DIN / EN | Often referenced to DIN 1.2379 or EN X153CrMoV12 (check exact equivalence with supplier) |
| ISO / ASTM | ISO 4957 tool steel family; ASTM A681 covers high-carbon and high-alloy tool steels |
| Other common names | D2 Tool Steel, Cold Work Tool Steel D2 |
Equivalents can vary by country and standard; always confirm the exact specification/grade (and heat treatment) with your supplier and request certificate references.
6. Equivalent Standards (Typical)
| Standard | Description |
|---|---|
| ASTM A681 | Standard specification for tool steels in various forms |
| ISO 4957 | Tool steels — designation and grades |
| EN Series (e.g., EN X153CrMoV12) | European tool-steel specifications — check exact match |
| DIN | German tool steel numbering (e.g., 1.2379) — supplier confirmation recommended |
7. Other Tool Steel Types / Related Alloys
| Alloy | Comments / Typical Use |
|---|---|
| O1 (Oil-hardening) | Good machinability, general-purpose tool steel for knives, gauges |
| A2 (Air-hardening) | Good dimensional stability, general-purpose forming dies |
| H13 (Hot-work) | Hot-work die steel for forging and extrusion |
| S7 (Shock-resistant) | High toughness for impact tools, punches |
| SKD11 / D2 equivalents | Japanese equivalents used in tooling and dies |
Another major advantage of D2 Tool Steel is its excellent dimensional stability during heat treatment. This enables manufacturers to rely on consistent tool performance and minimal distortion, crucial for precision engineering and complex tool profiles. Riddhi Siddhi Impex ensures precise heat treatment processes to meet the exact hardness requirements of our clients, typically ranging from 55 HRC to 62 HRC depending on the application..
Frequently Asked Questions (FAQs)
- Q1: What are the primary applications of D2 Tool Steel Round Bar?
- A1: D2 is commonly used for cold-work tooling: punches, dies, shear blades, slitters, industrial knives, form tools, and wear-resistant components.
- Q2: What heat treatment is typical for D2 and what hardness can be expected?
- A2: D2 is typically hardened (austenitized) and then oil- or air-cooled followed by tempering. Typical hardened & tempered hardness ranges from ~55 to 62 HRC depending on treatment and section size.
- Q3: Is D2 suitable for corrosion-prone environments?
- A3: D2 is a high-chromium tool steel with some corrosion resistance compared to plain carbon steels, but it is not stainless. For corrosive environments consider stainless tool steels or apply protective coatings.
- Q4: What should I specify when ordering D2 Round Bars?
- A4: Specify diameter, length, required heat-treatment condition (annealed / hardened & tempered), finish (ground/turned), applicable standard/certification, and quantity. Request Mill Test Certificate (MTC) and any required NDT reports.
Cities we have supplied our products to
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Countries we have supplied our products to
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