China Hot Rolled Alloy Steel Scm440 415 Round Bar Price

Chemical Element for JIS SCM440 round alloy steel bar

StandardGrade Number
GB42CrMoCSiMnPSCrNiMoCuASTM41400.36-0.440.10-0.400.65-1.10≤0.04≤0.040.75-1.20-0.15-0.35≤0.030DIN42CrMo4 1.72250.35-0.440.15-0.300.70-0.90≤0.035≤0.040.80-1.10-0.15-0.25≤0.025JISSCM4400.38-0.420.15-0.350.60-0.85≤0.03≤0.030.9-1.20≤0.250.15-0.30≤0.30

Physical Properties for JIS SCM440 round alloy steel bar

Physical PropertiesTensile Strength (MPa)≥1080(110)Yield strength(MPa)≥930(95)Elongation(%)≥12Reduction of area(%)≥45Akv (J)≥63Impact roughness(J/cm2)≥78(8)Hardness≤217HBSpecimen size25mm

Surface Treatment: painting,plating,polishing,black oxide,transparent anti-rust oil
Heat treatment: Normalized / Annealed / Quenched / tempered
Processing

Electric arc furnace melting→refining furnace→vacuum treatment furnace→
→cast ingot→steel ingot anneal→ heating → high-speed forging, refining
forging→annel,retarded cooling,air cooling→quenching and tempering
treatment→finishing operation→test→finished products

Application:
Foodstuff, gas, metallurgy, biology, electron, chemical, petroleum, boilers, nuclear, energy, construction field, ships building industry, war and electricity industry, boiler heat exchanger, machiner and hardware fields and medical equipment, fertilizer, etc.

Symbol
of ClassChemical Composition %CSiMnP Max.S Max.CrMoSCM 4150.130.180.150.350.600.850.0300.0300.901.200.150.30SCM 4180.160.210.150.350.600.850.0300.0300.901.200.150.30SCM 4200.180.230.150.350.600.850.0300.0300.901.200.150.30SCM 4210.170.230.150.350.701.000.0300.0300.901.200.150.30SCM 4300.280.330.150.350.600.850.0300.0301.001.500.150.30SCM 4320.270.370.150.350.300.600.0300.0300.901.200.150.30SCM 4350.330.380.150.350.600.850.0300.0300.901.200.150.30SCM 4400.380.430.150.350.600.850.0300.0300.901.200.150.30SCM 4450.430.480.150.350.600.850.0300.0300.901.200.150.30SCM 8220.200.250.150.350.600.850.0300.0300.901.200.150.30Note : As impurities, Ni and Cu shall not exceed 0.25% and 0.30% respectively for all grades.