Huaxia Steel — Professional Cold Work Tool Steel Supplier
15+ years of experience | ISO 9001 & SGS Certified | Factory-direct pricing | Custom sizes available | Worldwide shipping
What is D2 TOOL STEEL?
AISI D2 tool steel is a high-carbon, high-chromium (11-13% Cr) air-hardening cold work tool steel renowned for its outstanding wear resistance and high compressive strength. The high chromium content produces a large volume of hard chromium carbides, giving D2 wear resistance that far surpasses O1 and A2 grades. D2 is often referred to as a “semi-stainless” tool steel due to its chromium content, offering moderate corrosion resistance in non-aggressive environments.
Huaxia Steel is a trusted D2 tool steel supplier providing material fully conforming to ASTM A681, DIN 1.2379, and JIS SKD11 standards. We supply D2 in hot-rolled and cold-rolled plates, round bars, flat bars, and forged blocks—all backed by mill test certificates (MTC) and available in custom sizes to reduce your machining waste.
Need D2 TOOL STEEL for Your Project?
We offer custom sizes, competitive pricing, and fast global delivery.
Chemical Composition (wt%)
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | 1.40 | 1.60 |
| Silicon (Si) | — | 0.60 |
| Manganese (Mn) | — | 0.60 |
| Phosphorus (P) | — | 0.030 |
| Sulfur (S) | — | 0.030 |
| Chromium (Cr) | 11.0 | 13.0 |
| Molybdenum (Mo) | 0.70 | 1.20 |
| Vanadium (V) | 0.70 | 1.10 |
Data per ASTM A681 / equivalent standards (2025/2026 Reference).
Mechanical & Physical Properties
- Hardness (Annealed): ~255 HB max
- Hardness (Air Hardened + Tempered): 58-62 HRC
- Tensile Strength: ~1,900 MPa (275 ksi)
- Compressive Strength: ~2,750 MPa
- Elastic Modulus: 210 GPa (30,450 ksi)
- Density: 7.7 g/cm³ (0.278 lb/in³)
- Thermal Conductivity (20°C): 20 W/m·K
- Melting Point: ~1,420°C (2,590°F)
Heat Treatment Guide
| Process | Temperature | Details |
|---|---|---|
| Annealing | 850-900°C (1560-1650°F) | Furnace cool ≤22°C/hr to ~600°C, then air cool |
| Preheating (Stage 1) | 450-500°C (842-932°F) | Equalize thoroughly |
| Preheating (Stage 2) | 850-900°C (1560-1650°F) | Hold until uniform temperature |
| Austenitizing | 1010-1040°C (1850-1904°F) | 30-45 min first inch + 15 min per additional inch |
| Quenching | Air cool (or oil for thick sections) | Achieves 62-64 HRC as-quenched |
| Tempering | 150-500°C (300-932°F) | Double temper recommended; 2-hour cycles; 150°C→62 HRC, 300°C→58 HRC, 500°C→54 HRC |
Need Custom Heat Treatment Advice?
Our engineers can recommend optimal heat treatment parameters for your specific application.
Common Applications
- Long-run stamping & blanking dies
- Shear blades & industrial knives
- Cold-forming & cold-extrusion dies
- Coining & embossing dies
- Precision gauges & measuring tools
- Wear plates, guide rails & bushings
- Injection mold inserts (abrasive plastics)
- Thread rolling dies
- Powder compaction tooling
- Slitting cutters & circular knives
International Equivalent Grades
| Standard / Country | Grade Designation | Details |
|---|---|---|
| USA (AISI/SAE) | D2 | UNS T30402, ASTM A681 |
| Germany (DIN) | 1.2379 | X153CrMoV12 |
| EU (EN ISO) | X153CrMoV12 | EN ISO 4957 |
| Japan (JIS) | SKD11 | JIS G4404 |
| China (GB) | Cr12MoV | GB/T 1299 |
| UK (BS) | BD2 | BS 4659 |
Available Forms & Dimensions
Round bars (dia 10-500mm), Flat bars (thickness 3-150mm), Plates (thickness 2-200mm, width up to 2000mm), Forged blocks available on request
Custom sizes: Available upon request. Contact us with your specifications for a tailored quotation.
Why Choose Huaxia Steel as Your D2 TOOL STEEL Supplier?
Factory-Direct Pricing
Eliminate middlemen. Our direct mill partnerships ensure competitive pricing on every order, from small prototype quantities to container loads.
Certified Quality
Every shipment includes full mill test certificates (MTC/EN 10204 3.1). ISO 9001 certified. Third-party SGS inspection available on request.
Custom Processing
Cut-to-size, precision sawing, surface grinding, and heat treatment services. We deliver material ready for your production line.
Fast Global Logistics
Efficient shipping to North America, Europe, Middle East, Southeast Asia, and beyond. Standard lead time 7-15 days for stock items.
Frequently Asked Questions
Q: What is the maximum hardness achievable with D2 tool steel?
The maximum hardness depends on the specific grade. After proper heat treatment, typical maximum hardness ranges from 58-67 HRC. Refer to the heat treatment table above for specific tempering curves.
Q: Can D2 tool steel be welded?
Most tool steels can be welded for repair purposes, but it requires proper preheating, low-hydrogen electrodes, and post-weld heat treatment. For high-chromium grades like D2, welding is generally not recommended for structural applications. Always consult the manufacturer’s welding guidelines.
Q: What is the difference between D2 and other tool steel grades?
Each tool steel grade is optimized for specific applications. The key differentiators are wear resistance, toughness, hot hardness, and heat treatment method (air/oil/water). Compare grades based on your specific requirements: wear resistance (D2 > A2 > O1), toughness (S7 > H13 > A2), and hot hardness (M2 > H13 > D2).
Q: How do I order D2 tool steel from Huaxia Steel?
Simply contact us via the form on this page, email, or phone. Provide the grade, dimensions (thickness x width x length or diameter x length), quantity, and any special requirements such as surface finish or heat treatment condition. Our team will respond with a tailored quotation within 12 hours.
Q: What certifications do your tool steel products carry?
All Huaxia Steel tool steel products are supplied with full Mill Test Certificates (MTC/EN 10204 3.1) showing chemical composition and mechanical properties. We are ISO 9001:2015 certified, and third-party inspection (SGS, BV, TUV) is available upon request at no extra charge for orders above 5 tons.
Ready to Order D2 TOOL STEEL?
Factory-direct pricing. ISO & SGS certified quality. Fast global logistics. Get your quote in 12 hours.
