AISI 4340 HOT ROLLED ALLOY STEEL BAR

AISI 4340 HOT ROLLED ALLOY STEEL BAR 4340 is a nickel-chromium-molybdenum alloy steel known for its toughness and its ability to attain high strengths in the heat-treated condition. It has very good fatigue resistance. Similar Grades Standard Grade Chemical composition (%) C Si Mn Cr Ni Mo P S GB 40CrNiMoA 0.37-0.44 0.17-0.37 0.50-0.80 0.60-0.90 1.25-1.65 0.15-0.25 ≤0.035 ≤0.035 AISI 4340 0.38-0.43 0.15-0.35 0.60-0.80 0.70-0.90 1.65-2.00 0.20-0.30 ≤0.035 ≤0.040 JIS SNCM439 0.36-0.43 0.15-0.35 0.60-0.90 0.60-1.00 1.60-2.00 0.15-0.30 ≤0.030 ≤0.030 Available Size Hot rolled round bar: dia16mm-dia310mm Hot rolled flat bar: thickness5mm-30mm, width50mm-130mm Hot rolled square bar: 12mm*12mm-100mm*100mm Available Heat Treatment Annealing/Normalizing/Hardening/Tempering/Quenching Annealing: AISI 4340 alloy steel is annealed at 844°C (1550°F) followed by cooling the furnace. Tempering: AISI 4340 alloy steel should be in the heat treated or normalized and heat treated condition before tempering. Tempering temperatures depend upon the desired strength level. Hardening: AISI 4340 alloy steel can be hardened by cold working or heat treatment. Characteristics Good toughness, high strengths in the heat-treated condition, very good fatigue resistance. Application AISI 4340 alloy steel is mainly used in power transmission gears and shafts, aircraft landing gear, and other structural parts. Delivery Condition Hot rolled, black surface/brigth surface with customers’ required heat treatment.

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jianhui metals group
Alabama, China | Rating

AISI 4340 HOT ROLLED ALLOY STEEL BAR