1.2379 tool steel bar
Product Overview
1.2379 is a high-carbon, high-chromium tool steel alloyed with molybdenum and vanadium, providing exceptional wear resistance and high compressive strength. It is an air-hardening steel characterized by its excellent dimensional stability during heat treatment. Compared to other high-chromium steels, 1.2379 offers superior toughness and resistance to edge chipping, making it the premier choice for high-precision, long-run cold work tooling and complex structural components.
1.1.2379 tool steel bar Steel Grade & Chemical Composition:
| Grade | Standard | C | Si | Mn | Cr | V | Mo | P | S |
| D2 | ASTM | 1.40-1.60 | 0.10-0.60 | 0.20-0.60 | 11.0-13.0 | 0.50-1.10 | 0.70-1.20 | 0.03max | 0.03max |
| 1.2379 | DIN | 1.45-1.60 | 0.10-0.60 | 0.20-0.60 | 11.0-13.0 | 0.70-1.10 | 0.70-1.00 | 0.03max | 0.03max |
| Cr12mov | GB | 1.45-1.70 | 0.40max | 0.60max | 11.0-12.5 | 0.15-0.30 | 0.40-0.60 | 0.03max | 0.03max |
| SKD11 | JIS | 1.40-1.60 | 0.40max | 0.60max | 11.0-13.0 | 0.20-0.50 | 0.80-1.20 | 0.03max | 0.03max |
2.1.2379 tool steel bar Size specification:
Round | Diameter | Length |
20mm-300mm | 2000mm-6000mm |
Steel plate/Flat | Thickness | Width | Length |
20-350mm | 205-810mm | 2000mm-5800mm |
Original Mill origin:Dongbei special(东北特钢),Tiangong（天工），changcheng special(长钢)，Huangshi(黄石)
3.1.2379 tool steel bar Delivery Condition:
Hot rolled/Forged
Black surface/Milled surface/Turned surface/Grounded surface
Annealled hardness 230HB max
With original edge
4.1.2379 tool steel bar Application:
Precision Cutting & Blanking Tools: High-performance dies for automotive and electronic components.
Cold Extrusion Tools: Heavy-duty punches and sleeves for metal forming.
Thread Rolling Dies: Durable tools for the mass production of screws and fasteners.
Shear Blades: Precision knives for slitting high-tensile steel strips.
Crushing Equipment: Wear-resistant liners and hammers for the recycling industry.
5.1.2379 tool steel bar Key Features:
Extreme Abrasive Wear Resistance: High volume of hard chromium carbides ensures a prolonged tool life.
Excellent Dimensional Stability: Exhibits minimal distortion and high precision after the hardening and tempering process.
Superior Toughness (vs. D3): Enhanced with Vanadium to refine grain structure and prevent premature cracking.
High Red Hardness: Maintains its mechanical properties even under elevated working temperatures.
Good Through-Hardening: Consistent hardness and strength from the surface to the core in large cross-sections.
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