AISI 4140 Alloy Steel

AISI 4140 is a chromium molybdenum alloy steel specification widely used in the oil and gas industry. Similar to grade AISI 4130 but with a slightly higher carbon content. The higher carbon content of AISI 4140 gives greater strength and heat treatment capabilities in comparison to AISI 4130, however it does have inferior weldability characteristics. AISI 4140 machines well in the supply condition of 18-22HRc.

We welcome export enquiries for AISI 4140 steel. Contact our sales office and consult our shipping policy for further details.

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Analysis

Carbon 0.38-0.43% Chromium 0.80-1.10% Manganese 0.75-1.00% Molybdenum 0.15-0.25% Silicon 0.10-0.35% Phosphorous 0.035% max Nickel 0.25% max Sulphur 0.040% max

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