W720 VMR Steel

W720 VMR Steel

Steel name: W720 VMR
Diagram No.: 2282
Mat.No. (Wr.Nr.) designation: ~1.6354
DIN designation: ~X3NiCoMoTi18-9-5
UNS designation: K93160, K93120
AMS designation: 6521, 6514
Chemical composition in weight %: max. 0.005% C, max. 0.05% Si, max. 0.10% Mn, 5.00% Mo, 18.50% Ni, 9.00% Co, 0.70% Ti, 0.10% Al
Steel group: Maraging high strength steels
Properties: Ultra-high-strength maraging steel. In contrast to heat treatable steels its outstanding tensile properties are not due to a hardened structure with relatively high carbon content, but to precipitation of intermetallic phases from a ductile nickel bearing matrix containing almost no carbon. This results in the following advantages: High tensile strength and excellent yield point ratio, satisfactory toughness (reduction of area, elongation, impact strength, fracture toughness) even at low temperatures, superior notched tensile strength and heat checking resistance, practically no size change in heat treatment, no decarburization, no cracking, full hardening even in sizes above average. Convenient machinability in the solution annealed condition (machining is also possible in the precipitation-hardened condition). Good cold forming properties owing to reduced susceptibility to work hardening, eminent weldability, simple heat treatment at low temperatures.
Applications: Tool steel that has proved highly satisfactory for hot and cold work and long-time service up to approx. 450°C (842°F) in various fields of application. Tools for hydrostatic presses, cold extrusion tools, cold heading and embossing tools, molds for the plastics industry, die casting tools for aluminium and zinc alloys, hot pressing tools, cold pilger mandrels.
Reference: Not shown in this demo version.

Heat Treatment
Solution annealing: 820°C (1508°F) / 1 hour / air, gas.
Ageing: 430°C (806°F) / 3 hours / air 1720 to 1870 N/mm2. 480°C (896°F) / 3 hours / air 1860 to 2260 N/mm2.
Diagram note: Solution annealed 820°C (1508°F) / 1 hour / air.

Mechanical Properties - Tempering Temperature

Price: 20.00 US $
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Other Steel Data links
Carbides in Steel
CCT and TTT Diagrams of Steels
CCT and TTT Diagram Calculating Service
Hardenability Diagrams of Steels
Hardenability Calculating Service
Macro Defects in Steel
Metal Etchants
Non-Metallic Inclusions in Steel
Semiconductor Etchants

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