4343 is a Standard grade Alloy Steel. It is commonly called AISI 4340 Nickel-chromium-molybdenum steel. It is composed of (in weight percentage) 0.38-0.43% Carbon (C), 0.60-0.80% Manganese (Mn), 0.035%(max) Phosphorus (P), 0.04%(max) Sulfur (S), 0.15-0.30ŀŀ⃀ ŀŀ⃀ ŀŀ⃀ ŀŀ⃀ ŀ⃀ ⃀ ŀŀ⃀ ŀŀ⃀ ŀŀ⃀ ŀŀ⃀ ŀ⃀ ⃀ ŀŀ⃀ ŀŀ⃀ǀŀŀ⃀ ŀŀ⃀ ŀ⃀ ⃀ ŀŀ⃀ ŀŀ⃀ǀŀŀ⃀ ŀŀ⃀ ŀ⃀ her designations of AISI 4340 alloy steel include UNS G4塐ˠ00 and AISI 4340. 塐ʸЉ Љ Љ Љ Љ Љ Љ
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