1.2767 | 5CrNi4Mo
1.2767 plastic mold steel with very high hardenability, ductility, resistance to pressure, abrasion and high impact strength. The material is used for the production of shears for cutting steel sheets and sections, stamping dies, hydraulic chisels, cold forging dies, hardened knives, stamps, punches or moulds for the production of plastics. The grade is characterized by high strength, load resistance, tempering and fatigue resistance. The grades 45NiCrMo16 and 40NiCrMo16 have been enriched with additional content of nickel, and molybdenum in the chemical composition.
Description
1.2767 Chemical Composition
| standard | grade | C | Si | Mn | Cr | P | S | Mo | Ni |
| DIN | 1.2767 | 0.40-0.50 | 0.10-0.40 | 0.15-0.45 | 1.20-1.50 | ≤0.03 | ≤0.03 | 0.15-0.35 | 3.80-4.80 |
Supply Range
Surface Finish: Black, Peeled, Machined/Turned or as per given requirements.
Forged Round Bar: 20mm - 650mm (Dia)
Rolled Bars: 12mm - 360mm (Dia)
Forged flats: 30-400mm(T)*500-1200mm(W)
Rolled flats: 10-360mm(T)*30-1020mm(W)
Other sizes of O1 material or as per customer’s requirements.
Heat Treatment
Forging:
Heat the steel slowly and uniformly to 1050°C. Re heat as necessary and avoid working below 850°C After forging cool slowly in furnace or thermoinsulating material.
Stress Relieving:
When dies produced in 1.2767 tool steel are heavily machined, stabilizing is recommended just before finish machining in order to relieve machining strains. Heat to approximately 650°C. Soak well and allow to cool in air.
Hardening:
Pre heat the tool slowly and uniformly to 650-700°C and thoroughly soak. Continue heating to the final hardening temperature of 840-870°C and allow the component to be heated through. Quench the component in oil or cool in air.
Tempering:
Slow heating to tempering temperature immediately after hardening. Minimum time in furnace: 1 hour per 20 mm part thickness. Tempering twice is recommended.
Annealing:
Heat uniformly to 630-650°C. Soak well and cool slowly in the furnace to approximately 600°C then cool in air,max. 260 HB
Applications
High-performance cavity plates and inserts for the processing of plastics with high surface requirements (mirror finish); stamping, forming and bending dies for particularly high pressure and bending stresses. Typical applications and components include plastic moulds, cutlery dies, shear blades for heavy gauge material, cutting tools, drawing jaws and highly stressed coining tools.
