Datong Hydraulic

 4130 steel, as low alloy steel, contains high amounts of chromium and is often referred to as chromoly. 4130 steel has good machinability, ductility, weldability and strength characteristics. 4130 steel is used for many different industries including the automotive, aerospace , hydraulic cylinder rod , cylidner barrel and machining industries. 4340 steel, as nickel-chromium-molybdenum alloy steel, is a very high strength steel. It is sought after for its toughness and for being used as a steel that will be highly stressed. 4340 steels are used in a variety of industries for different applications including the automotive, aerospace, and tooling industries. Chemical Composition Comparison: 4130 vs 4340 steel Standard Grade C Mn P S Si Cr Mo Ni ASTM A29 4340 0.38-0.43 0.60-0.80 0.035 0.040 0.15-0.35 0.70-0.90 0.20-0.30 1.65-2.00 4130 0.28-0.33 0.40-0.60 0.035 0.040 0.15-0.35 0.80-1.10 0.15-0.25 Mechanical Properties: 4130 vs 4340 steel Below are the mechanical properties for both norma

  42CrMo4  is a heat treatable steel which contains at least 0.9%Cr,0.15%Mo as strengthening elements.After quenched and tempered, It obtains high strength, good low-temperature impact toughness with a typical tensile strength of 900 -1200 N/mm2. 42CrMo4 steel has better performance than  34CrMo4  steel due to the higher carbon and chromium content.Similar to AISI 4140,only a little difference in Mn,Cr content.This material also has good machinability,good wear-resistance,but the temper brittleness is not obvious,and poor in weldability. 2.Chemical Composition Grade C Si Mn Cr Mo P S 42CrMo4/1.7225 0.38-0.45 ≤ 0.4 0.6-0.9 0.9-1.2 0.15-0.3 ≤ 0.025 ≤ 0.035 42CrMoS4/1.7227 0.38-0.45 ≤ 0.4 0.6-0.9 0.9-1.2 0.15-0.3 ≤ 0.025 0.02-0.04 3.Relevant Standards USA UK China Japan France Russia 4140 EN19/708M40 42CrMo SCM440 42CD4 42HM 4. Mechanical Property Diameter d mm ≤ 16 16-40 40-100 100-160 160-250 Thickness t mm < 8 8-20 20-60 60-100 100-160 Yield Strength Mpa ≥900 ≥750 ≥650 ≥550 ≥500 Ten