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E: enquiry@qilumetal.com
E: enquiry@qilumetal.com
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38CrCoWV18-17-17
Qilu
38CrCoWV18-17-17 / 1.2661 is a widely used high-alloy hot work tool steel conforming to the German standard DIN EN ISO 4957. It is renowned for its high hardness, excellent wear resistance, good hardenability, and adequate toughness. Following appropriate heat treatment, this steel maintains excellent dimensional stability and resistance to tempering softening, making it suitable for high-load precision molds and stamping tools. Due to its balanced properties and reliability, many countries have equivalent grades to DIN 1.2661, such as SKD8 from the Japanese standard JIS G4404.
1.2661 steel contains high carbon and chromium, which contribute to its outstanding hardness and wear resistance. The tungsten and cobalt additions further enhance its red-hardness and strength under demanding conditions.
1: Steel equivalent
Country | ISO | Germany | Japan |
Standard | ISO 4957 | DIN 17350 | JIS G4404 |
Grade | 38CrCoWV18-17-17 | 1.2661 | SKD8 |
2: Chemical composition
Grade | C | Si | Mn | Cr | Mo | W | P | S | V | Co |
| 38CrCoWV18-17-17/1.2661 | 0.35-0.45 | 0.15-0.50 | 0.20-0.50 | 4.00-4.70 | 0.30-0.50 | 3.80-4.50 | 0.030 Max | 0.020 Max | 1.70-2.10 | 4.00-4.50 |
| SKD8 | 0.35-0.45 | 0.15-0.50 | 0.20-0.50 | 4.00-4.70 | 0.30-0.50 | 3.80-4.50 | 0.030 Max | 0.020 Max | 1.70-2.10 | 4.00-4.50 |
3: Surface hardness and hardenability
Heat Treatment | Hardness |
Annealed (+A) | HB260Max |
| Hardening and Tempering (+HT) | HRC48 Min |
| Quenched and tempred (+QT) | HRC28-32(Common Range) |
4: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Hot rolled bar | Φ10-Φ190mm | 2000-5800mm |
Hot forged bar | Φ200-Φ600mm | 2000-5800mm |
Hot rolled plate/sheet | T:10-60mm; W:310-810mm | 2000-5800mm |
Hot forged plate | T:70-250mm; W:310-810mm | 2000-5800mm |
Hot Forged block | T: 260-500mm; W: 300-1000mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
To ensure optimal performance for your application, we produce 1.2661 tool steel on a dedicated make-to-order basis. This approach guarantees fresh production and allows us to customize the process for your specific requirements. Tell us your needs, and let's get started.
5: Ultrasonic Test
EN10228-3 class III or Sep 1921-84 D/D
6：Steel making & Forging processing
1): Steel making process:
EF+LF+VD
EAF+LF+VD
EF+LF+VD+ESR
EAF+LF+VD+ESR
2): Forging processing:
Initial temperature: 1050-1100℃
Final temperature: 850℃
Cooling in the furnace or in the sand
7: Heat treatment
1): Annealed:
Heat 1.2661 steel to 780-800℃
Cool at a rate of approximately 10–20 °C per hour to 650 °C. Cooling in the furnace or in the sand
2): Quenching and tempering:
Heat 1.2661 steel to 1110-1130℃ in the salt bath furnace
Quench in the Oil
Temper steel at 590-610℃ in the furnace
Cooling in the air.
Above curve in figure is a rough guide to the tempering behaviour of steels.
8：Application
1.2661 is a high-carbon, high-chromium hot-work tool steel renowned for its exceptional wear resistance, excellent hardenability, and stability under compressive deformation. It is primarily used in manufacturing dies for forming and processing metals or materials at room temperature, where applications typically demand the dies to withstand immense pressure and severe wear while maintaining dimensional stability. Main application areas:
1. Blanking and Shearing Dies:
Precision blanking dies: For high-precision blanking requiring exceptional dimensional accuracy and smooth cut surfaces
Stamping dies and punching dies: Particularly suited for applications demanding high wear resistance, such as silicon steel sheets and high-strength steel plates
Shear blades and cutting dies: For cutting metal wire, bars, and plates
2. Forming Dies:
Cold heading and embossing dies: Used for imprinting patterns, markings, or performing cold forming on metal parts, requiring surfaces that withstand high pressure and resist wear
Drawing and extrusion dies: Suitable for drawing and cold extrusion processes with low production volumes or extreme wear resistance requirements
3. Other Tooling and Components:
Gauges and calipers: Such as block gauges and plug gauges, leveraging their excellent dimensional stability
Rollers: Used for cold rolling certain metal strips
Wear-resistant inserts in plastic molds: Though not standard plastic mold steel, they serve as wear-resistant inserts when processing abrasive plastics containing reinforcing fillers like glass fiber
38CrCoWV18-17-17 / 1.2661 is a widely used high-alloy hot work tool steel conforming to the German standard DIN EN ISO 4957. It is renowned for its high hardness, excellent wear resistance, good hardenability, and adequate toughness. Following appropriate heat treatment, this steel maintains excellent dimensional stability and resistance to tempering softening, making it suitable for high-load precision molds and stamping tools. Due to its balanced properties and reliability, many countries have equivalent grades to DIN 1.2661, such as SKD8 from the Japanese standard JIS G4404.
1.2661 steel contains high carbon and chromium, which contribute to its outstanding hardness and wear resistance. The tungsten and cobalt additions further enhance its red-hardness and strength under demanding conditions.
1: Steel equivalent
Country | ISO | Germany | Japan |
Standard | ISO 4957 | DIN 17350 | JIS G4404 |
Grade | 38CrCoWV18-17-17 | 1.2661 | SKD8 |
2: Chemical composition
Grade | C | Si | Mn | Cr | Mo | W | P | S | V | Co |
| 38CrCoWV18-17-17/1.2661 | 0.35-0.45 | 0.15-0.50 | 0.20-0.50 | 4.00-4.70 | 0.30-0.50 | 3.80-4.50 | 0.030 Max | 0.020 Max | 1.70-2.10 | 4.00-4.50 |
| SKD8 | 0.35-0.45 | 0.15-0.50 | 0.20-0.50 | 4.00-4.70 | 0.30-0.50 | 3.80-4.50 | 0.030 Max | 0.020 Max | 1.70-2.10 | 4.00-4.50 |
3: Surface hardness and hardenability
Heat Treatment | Hardness |
Annealed (+A) | HB260Max |
| Hardening and Tempering (+HT) | HRC48 Min |
| Quenched and tempred (+QT) | HRC28-32(Common Range) |
4: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Hot rolled bar | Φ10-Φ190mm | 2000-5800mm |
Hot forged bar | Φ200-Φ600mm | 2000-5800mm |
Hot rolled plate/sheet | T:10-60mm; W:310-810mm | 2000-5800mm |
Hot forged plate | T:70-250mm; W:310-810mm | 2000-5800mm |
Hot Forged block | T: 260-500mm; W: 300-1000mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
To ensure optimal performance for your application, we produce 1.2661 tool steel on a dedicated make-to-order basis. This approach guarantees fresh production and allows us to customize the process for your specific requirements. Tell us your needs, and let's get started.
5: Ultrasonic Test
EN10228-3 class III or Sep 1921-84 D/D
6：Steel making & Forging processing
1): Steel making process:
EF+LF+VD
EAF+LF+VD
EF+LF+VD+ESR
EAF+LF+VD+ESR
2): Forging processing:
Initial temperature: 1050-1100℃
Final temperature: 850℃
Cooling in the furnace or in the sand
7: Heat treatment
1): Annealed:
Heat 1.2661 steel to 780-800℃
Cool at a rate of approximately 10–20 °C per hour to 650 °C. Cooling in the furnace or in the sand
2): Quenching and tempering:
Heat 1.2661 steel to 1110-1130℃ in the salt bath furnace
Quench in the Oil
Temper steel at 590-610℃ in the furnace
Cooling in the air.
Above curve in figure is a rough guide to the tempering behaviour of steels.
8：Application
1.2661 is a high-carbon, high-chromium hot-work tool steel renowned for its exceptional wear resistance, excellent hardenability, and stability under compressive deformation. It is primarily used in manufacturing dies for forming and processing metals or materials at room temperature, where applications typically demand the dies to withstand immense pressure and severe wear while maintaining dimensional stability. Main application areas:
1. Blanking and Shearing Dies:
Precision blanking dies: For high-precision blanking requiring exceptional dimensional accuracy and smooth cut surfaces
Stamping dies and punching dies: Particularly suited for applications demanding high wear resistance, such as silicon steel sheets and high-strength steel plates
Shear blades and cutting dies: For cutting metal wire, bars, and plates
2. Forming Dies:
Cold heading and embossing dies: Used for imprinting patterns, markings, or performing cold forming on metal parts, requiring surfaces that withstand high pressure and resist wear
Drawing and extrusion dies: Suitable for drawing and cold extrusion processes with low production volumes or extreme wear resistance requirements
3. Other Tooling and Components:
Gauges and calipers: Such as block gauges and plug gauges, leveraging their excellent dimensional stability
Rollers: Used for cold rolling certain metal strips
Wear-resistant inserts in plastic molds: Though not standard plastic mold steel, they serve as wear-resistant inserts when processing abrasive plastics containing reinforcing fillers like glass fiber
