35# steel high-quality carbon structural steel has good plasticity and proper strength, good process performance, and acceptable welding performance. It is mostly used in the normalized state and quenched and tempered state.
35# steel heat treatment and metallographic structure:35# steel is quenched and tempered. The quenching heating temperature of 35 steel is 860°, and the holding time depends on the effective thickness of the parts and the heating equipment. For 500° tempering, the tempering time is 1.5 times the quenching holding time.
Heat treatment specification: normalizing, 870℃; quenching, 850℃; tempering, 600℃.
Metallographic structure: ferrite + pearlite.
35#Steel chemical composition Carbon C: 0.32～0.40, Si: 0.17～0.37, Mn: 0.50～0.80, S: ≤0.035, P: ≤0.035, Cr: ≤0.25, Ni: ≤0.25, Cu: ≤0.25
35#steel mechanical propertiesTensile strength σb (MPa): ≥530(54)
Yield strength σs (MPa): ≥315(32)
Elongation δ5 (%): ≥20
Reduction of area ψ (%): ≥45
Impact energy Akv (J): ≥55
Impact toughness value αkv (J/cm2): ≥69(7)
Hardness: not heat-treated ≤197HB
Sample size: sample size is 25mm[1]
35# steel delivery status: delivery without heat treatment or heat treatment (annealing, normalizing or high temperature tempering). If the delivery is required to be delivered under heat treatment, it should be indicated in the contract. If it is not specified, the delivery shall be delivered without heat treatment.
35# steel high-quality carbon structural steel is widely used in the manufacture of various forgings and hot-pressed parts, cold drawn and upsetting steel, seamless
Steel pipes, parts in machinery manufacturing, such as crankshafts, rotating shafts, shaft pins, levers, connecting rods, beams, sleeves, Wheels, washers, screws, nuts.
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