SKH55 High Speed Steel
JIS SKH55 high speed tool steel manufacturers and suppliers,supplied in round rods,square bars,flat bars,plates,sheets and blocks.
SKH55 steel is a Cobalt-Type high speed steel according to JIS standard. JIS SKH55 is similar to SKH51 high-speed steel but with added 5% cobalt. Special heat treating process will bring latent properties of SKH55 tool steel into full play and obviously improve its strength and toughness. The hardness can reach 66 HRC in the general heat treatment. This material also offers excellent cutting performance.
Carbon:0.87-0.95%; Silicon:0.45% max; Manganese:0.40% max;
Chromium:3.80-4.50%; Molybdenum:4.70-5.20%; Vanadium:1.70-2.10%;
3.Form & Size
1)JIS SKH55 High-Speed Steel Round Rods, Square/Flat Bars,Plates,Sheets,etc.
2)SKH55 Tool Steel Size Available(Length can be customized):
dia. 1-16mm(cold drawn);
dia. 10-50mm(hot rolled);
dia. 50-180mm(hot forged);
dia. 180-300(free forging);
Thickness: 1-2.5mm(cold rolled); 1.5-20mm(hot rolled); 20-300mm(hot forged);
Width: Max 800mm;
5.SKH55 HSS Steel Applications
1)JIS SKH55 steel is used in cutting tools:broaches,saw blades,reamers,milling cutters and end mills.
2)SKH55 steel is a good quality wear resistant steel grade.
3)It’s also commonly used in tools which has high demands for heat resistance.
6.JIS SKH55 Steel Forging
1)Preheat SKH55 tool steel uniformly and slowly to about 480°C;
2)Heat the forging temperature up to 950-1050°C;
3)The forging temperature must not below 950°C;
4)SKH55 tool steel should be cooled very slowly.
SKH55 steel should be annealed after hot working. And re annealing is necessary if the SKH55 tool steel has been hot worked, forged, or hardened.Increase the temperature of SKH55 high speed steel to 850°C. Hold at the temperature for one hour per 25mm of thickness,then cool slowly in the furnace. The annealed hardness achieved should be less than 255HB.
Hardening(in a vacuum,controlled furnace, or salt bath)
1)Preheat SKH55 hss steel to 500°C ;
2)Increase the temperature to 860°C;
3)Heating the hardening temperature to 1050-1200°C;
4)The SKH55 tool steel component should be heated throughly;
5)Transfer to the high temperature salt bath or vacuum furnace;
1)Heat thoroughly and uniformly to the tempering temperature;
2)Temper SKH55 tool steel immediately after quenching;
3)Triple tempering is strongly recommended;
4)Cooled SKH55 tool steel in the air to 20°C.
Enquiry for JIS SKH55 high speed steel round rods, square/flat bars , plates and sheets.