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4130 and 4340: What you need to know

4130 steel also known as AISI 4130 or SAE 4130, is a Cr-Mo alloy structural steel, is a kind of low alloy steel. Its primary alloying elements are Cr and Mo. 4130 steel has high strength and toughness, good hardenability. 4130 steel is usually used in quenched and tempered condition, low carbon 4130 steel can also be used as carburized steel that requires higher core strength. 4130 steel is widely used in aerospace, automotive, oil and gas and machinery manufacturing industries due to its excellent mechanical properties and good machinability.

High-strength alloy steel showdown: performance comparison of 34CrNiMo6 and 36CrNiMo4

34CrNiMo6 is a high-strength alloy structural steel with chemical composition including carbon, silicon, manganese, phosphorus, sulfur, chromium, nickel, molybdenum and other elements. It has excellent mechanical properties, tensile strength can reach 1100MPa, and yield strength is above 800MPa. After quenching and tempering, the hardness is 36-40HRC. It has good processing and welding properties and is widely used in automobile, aviation, machinery manufacturing and petrochemical industries.

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