Henan BEBON international co.,ltd
SCr420, JIS G4104 SCr420 steel, SCr420 steel plate, SCr420 structural alloy steel, SCr420 Alloy structural steel
JIS G4104 SCr420 steel’s main features
SCr420 steel has high strength and hardenability, in water the critical full hardening diameters are 4-22mm , in oil the critical full hardening diameters are 11-40mm. But its toughness is poorer.This steel in carburization still has grain growth tendency. Quenching cooling directly has big influence to impact toughness. So after carburizing, SCr420 steel need 2 times quenching to improve heart toughness of parts, no temper brittleness. The coldstraining plasticity of SCr420 steel is high, can be done wiredrawing in cold state. The machinability in high temperature normalizing or quenching and tempering condition is good, but after annealing it will be poor. SCr420 steel is pearlite, the weldability is good, commonly no need to do heat treatment after welding. However, for the parts whose thickness is more than 15 mm, it should do the preheating to 100 ~ 150 ℃ before welding, also after welding it is no need to do heat treatment.
JIS G4104 SCr420 steel’s application
SCr420 steel is mainly used for making cam shaft,driven gears of small tractor. This kind of steel also is mostly used in the manufacturing of the high demand heart intensity, surface under wear, section under 30 mm or complex and not big load carburized parts (oil quenching), such as: machine tool transmission gear, gear shaft, worm and piston pins, claw clutch, etc.
JIS G4104 SCr420 steel’s equivalent material in different standard.
20CR / 20Cr4 / 5120 / G51200(UNS) / H51200(UNS) / 20Cr4 / 527A19, 527M20 / 18C3 / 20X
JIS G4104 SCr420 steel’s chemical composition
C / Si / Mn / Cr / Ni / Cu / P / S≤ / ≤
0.18～0.24 / 0.17～0.37 / 0.50～0.80 / 0.70～1.00 / 0.03 / 0.035
JIS G4104 SCr420 steel’s mechanical property
Tensile Strength（σb/MPa） / Yield point（σs/MPa） / Elongation（δ5/%） / Reduction of Area（ψ/%） / Impact Absorbing Energy（Aku2/J） / Brinell Hardness（HBS100/3000）Annealing or High Tempering
≥835 / ≥540 / ≥10 / ≥40 / ≥47 / ≤179
Henan Bebon Internationl Co., Ltd is specialized in offering every kind of structural alloy steel plates.Bebon International is a professional SCr420 steel exporter in china. We can supply more than 1000 tons SCr420 steel every month. Besides that, Bebon Internationl has very good relationship with every big steel mill, so we could promise the delivery time and the competitive price compared with other companies.So, if you have any inquiry about SCr420 steel, if you are looking for a sincerely SCr420 steel supplier and want to get the SCr420 steel price, please do not hesitate to contact us.
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