Chemical composition of skt4 steel :
C Si Mn Cr Ni Mo P S
0.50-0.60Â?¤0.40 0.50-0.80 0.50-0.80 1.40-1.80 0.15-0.30 Â?¤0.030 Â?¤0.030
Size:
Round
Diameter Length
50mm-500mm 2000mm-5800mm
Steel plate
Thickness Width Length
20-400mm 80-1000mm2000mm-5800mm
Pre-hot treatment:
1.Annealing after forging:heat to 760-780â°c, keep 4-6h, furnace cold below 500â°c out and air cooling , hardness after annealing is 197-241hbs,
2.Isothermal after forging:heat to 850-870â°c, keep 4-6h, isothermal temperature680â°c, keep 4-6h, furnace cold below 500â°c
Out and air cooling , hardness after forging is 197-241hbs.
3.Forging die renovation annealing:heat to 710-730â°c, keep 4-6h, furnace cool below 500â°c, out and air cooling, hardness
After annealing is 197-241hbs.
Characteristic
1.Good strength and high abrasion resistance
2.Good quenching
Dongguan songshun mould steel co., ltd. Is located in changan town, dongguan city, china. After 10 years' development,
Now we have the capacity to provide complete services from manufacturing and marketing to distributing. The main grades
Of mould steel, tool steel and special steel which we market are listed as follows:
Supplier: Aluminium ( ingots, t bars, sows, rods), copper (cathodes, cakes, billets, ingots, rods), lead (ingots), nickel (cathodes both cut and uncut briquettes, pellets, discs, etc.), tin (ingots, etc.), zinc (ingots both regular size and jumbos), steel billets (all types including crc, hrc, hdgc, plates, sheets), concentrates and ores for above items including bauxite, manganese, clinker and iron ores etc), scraps of above items including hms 1&2 and steel scraps
Buyer: Aluminium ( ingots, t bars, sows, rods), copper (cathodes, cakes, billets, ingots, rods), lead (ingots), nickel (cathodes both cut and uncut briquettes, pellets, discs, etc.), tin (ingots, etc.), zinc (ingots both regular size and jumbos), steel billets (all types including crc, hrc, hdgc, plates, sheets), concentrates and ores for above items including bauxite, manganese, clinker and iron ores etc), scraps of above items including hms 1&2 and steel scraps
