1.2842 | O2 | X90MnCrV8 | CrMn90 | SKS3

1.2842 | O2 | X90MnCrV8 | CrMn90 | SKS3

1.2842 is an oil hardening tool steel type supplied in the annealed condition. Suitable for through hardening it offers characteristics of good durability, excellent wear resistance and holds a good cutting edge. It is a good quality general purpose tool steel often used where the expense of a high carbon high chromium grade is not justified.

Chemical Composition

Forging

Heat the tool steel slowly and uniformly to 1000°C. Forge within a range of 1050-850°C reheating if necessary. Cool slowly (preferably in a furnace) to avoid setting up stresses.

Annealing

Heat uniformly to 720°C, equalise, then furnace cool. (Hardness about 229 Brinell). Fully machined tools in grade 1.2842 should be packed during annealing.

Hardening

Heat the 1.2842 uniformly to 790-820°C until heated through. (If possible pre-heat at 300-500°C). Allow 30 minutes per 25 millimetre of ruling section and quench immediately in oil.

Heat Treatment

Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the size and shape of each component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of tool steels.

Applications

Typical applications include medium run dies, press tools, drawing punches, broaches, bushings, lathe centres, chuck jaws, master cavity sinking hobs, plug gauges, thread gauges, thread cutting tools and precision measuring tools. It is also a popular tool steel for cams, cloth cutting knives, cold taps, reamers, collets, tube expander rolls, plastic moulds and woodworking knives, cutting hobs, strip slitting cutters and trimmer dies.