Material 1.

Cold work tool steel

Steel 1. - tool steel with uniform strength

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Machinable, uniform strength and easy to quench and temper - tool steel 1. complies with DIN/EN 40CrMnMoS8-6 and belongs to the cold work tool steel material group. As plastic mold steel, it is popularly used for high-strength mold frames.

Chemical composition & properties

The tool steel consists of C 0.4, of Si 0.4, Mn 1.5, Cr 1.9, Mo 0.2 and S 0.1. Thus it is very similar to the material 1., only in the sulfur addition the two steels differ.

The consequences: The 1. steel is easier to machine. In addition to good machinability, the tool steel offers good dimensional stability and good toughness. After nitriding, the steel is wear-resistant. The material cools slowly and offers uniform hardness for large cross sections. Hardening is not common, as the material is gate quenched and tempered. The material is only suitable for technical polishing to a limited extent. The density of the steel is 7.85 kg/dm3, and the modulus of elasticity is 210 kN/mm2. The steel has a thermal conductivity of 34.5 W/(m.K) and a specific heat of 460 J/(kg-K).

This allows it to be soft annealed at 710 to 740 degrees Celsius, with furnace cooling of four to six hours. Stress-relieved annealing is possible at 650 to 680 degrees Celsius, with furnace cooling of two to three hours. The steel hardens at 840 to 870 degrees Celsius (oil, hot bath or air). A maximum hardness of 220 HB can be achieved by annealing.

Use of material 1.

The tool steel is very suitable for high-strength mold frames as well as for medium and large molds. It is often used in the plastics industry, but our customers for steel 1. also come from the mechanical engineering sector. The steel can be used for mold superstructures as well as for structural parts. The properties of the steel can be put to good use for tools for non-cutting shaping.

The cold work steel is very suitable for handling thermosets as well as thermoplastics. Plastic molds and die casting molds can be made well from it. The sulfur-containing tool steel is even suitable for injection molds, as these place high demands on hardness distortion. For example, steel 1. can be used very well for molds from which seating furniture or bottle crates are made, in which buckets or tubs are manufactured.

Steel 1. - tool steel with uniform strength

Machinable, uniform strength and easy to quench and temper - tool steel 1. complies with DIN/EN 40CrMnMoS8-6 and belongs to the cold work tool steel material group. As plastic mold steel, it is popularly used for high-strength mold frames.

Chemical composition & properties

The tool steel consists of C 0.4, of Si 0.4, Mn 1.5, Cr 1.9, Mo 0.2 and S 0.1. Thus it is very similar to the material 1., only in the sulfur addition the two steels differ.

Contact us to discuss your requirements of 1. tool steel. Our experienced sales team can help you identify the options that best suit your needs.

The consequences: The 1. steel is easier to machine. In addition to good machinability, the tool steel offers good dimensional stability and good toughness. After nitriding, the steel is wear-resistant. The material cools slowly and offers uniform hardness for large cross sections. Hardening is not common, as the material is gate quenched and tempered. The material is only suitable for technical polishing to a limited extent. The density of the steel is 7.85 kg/dm3, and the modulus of elasticity is 210 kN/mm2. The steel has a thermal conductivity of 34.5 W/(m.K) and a specific heat of 460 J/(kg-K).

This allows it to be soft annealed at 710 to 740 degrees Celsius, with furnace cooling of four to six hours. Stress-relieved annealing is possible at 650 to 680 degrees Celsius, with furnace cooling of two to three hours. The steel hardens at 840 to 870 degrees Celsius (oil, hot bath or air). A maximum hardness of 220 HB can be achieved by annealing.

Use of material 1.

The tool steel is very suitable for high-strength mold frames as well as for medium and large molds. It is often used in the plastics industry, but our customers for steel 1. also come from the mechanical engineering sector. The steel can be used for mold superstructures as well as for structural parts.

Do you have any questions about the material or would you like to order? Complete our inquiry form, it`s free of charge and without obligation. We will get in touch with you in order to provide you with more information.

1. Steel | P20+S Steel

DIN 1. steel is a high quality plastic mold steel material. Steel 1. is material produced by add about 0.08% sulphur on material 1.. The S element improves free cutting ability of 1. steel. DIN material is usually delivered in pre-hardness condition and hardness 28~34HRC.

ASTM P20+S steel is equivalent to DIN 1. material. Generally, 40CrMnMoS8-6/1. and P20+S mold steel will have the same properties for final application.

1. Supply Range of 1. Material

Round Bar: diameter 20mm – 500mm

Steel Plate and Steel Block: thickness 12-300mm x width 200-mm (*20-120mm plate in stock in prehardened condition)

Surface Finish: Black Surface, Roughly Machined, Peeled & Turned or as per given requirements.

2. Relevant DIN 1. Steel Specification and Equivalent Steel Grades

Country German USA Standard DIN EN ISO ASTM/AISI Grades 1. P20+S

3. DIN 1. Material Chemical Composition and Equivalent

DIN ISO C Mn P S Si Cr Mo 1. 0.35 0.45 1.30 1.60 0.03 0.05-0.1 0.20 0.40 1.80 2.10 0.15 0.25 ASTM A681 C Mn P S Si Cr T P20+S 0.28 0.40 0.60 1.00 0.03 0.03 0.20 0.80 1.40 2.00 0.30 0.55

4. DIN 1. Plastic Mold Steel Properties

• Density: 7.84 g/cm3
• Linear expansion coefficient: 12.4 *10-6m/(m*K)
• Thermal conductivity: 34 W/(m*K)
• Hardness (in soft annealed condition): < 235 HB
• Hardness (in hardened and tempered condition): < 51 HRC

5. Forging of

Hot forming temperature:  -850 °C.

6. Heat Treatment of Plastic Mold Steel 1.

• Grade: 40CrMnMoS8-6
• Material No. W-Nr.: 1.
• Hot working temperature / C: ~ 850
• Annealing temperature / C: 780 ~ 760
• After annealing, the hardness is less than or equal to 230 HBS
• Quenching temperature / C: 830 ~ 870
• Cooling medium: Oil
• Common tempering temperature / C: 640 ~ 680
• Hardness after tempering HRC|100 C: 51
• Hardness after tempering HRC|200 C: 50
• Hardness after tempering HRC|300 C: 48
• Hardness after tempering HRC|400 C: 45

7. Applications of 1. Materials

DIN 1. is good for plastic injection moulds for thermoplastics, extrusion dies for thermoplastic, compression molds application. Tools for plastics processing and moulds for pressure die casting.

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