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By certification 
Steel grade:
AISI 4140, DIN 42CrMo4,1.7225, JIS SCM4
Chemical Composition(%):
|
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Mo |
|
0.42 |
0.30 |
0.60 |
≤0.025 |
≤0.025 |
1.00 |
≤ 0.25 |
0.20 |
Application:
Shafts, gears, cylinders and columns for industry mechanics in general.Construction of moldFor compression molds, where the etching is not required.Mechanical parts in general.
hardness after annealing ≤229HBS
Size:
Diameter:20mm-1000mmThickness 20-800mm, Width 100-1000mm, Length 1000-5800mm or as required
Process flow:
Electric arc furnace melting→Refining furnace → Vacuum treatment furnace → Cast ingot → Steel ingot anneal → Heating → High-speed forging,refining forging → Anneal,retarded cooling,air cooling → Quenching and tempering tretment → Finishing operation → Text → Finished products
