40Cr Alloy Steel Sheet – High-Strength Quenched & Tempered Structural Steel Plate

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 PRODUCT INTRODUCTION

40Cr alloy steel sheet is one of the most commonly used structural alloy steels in China and internationally. It belongs to the GB/T 3077 standard and is comparable to AISI 5140, DIN 41Cr4, or JIS SCr440. Known for its high strength, good toughness, and superior hardenability, 40Cr performs exceptionally well under quenching and tempering heat treatment.

This alloy steel sheet is ideal for components that demand high mechanical properties such as strength, toughness, and fatigue resistance. It is also suitable for induction hardening of the surface to improve wear resistance.

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 PRODUCT FEATURES

• High strength after quenching & tempering

• Good wear resistance and fatigue strength

• Suitable for further heat treatment (carburizing, induction hardening)

• Excellent machinability and weldability with proper procedure

• Uniform thickness and flatness control

• Supplied as hot rolled or precision-cut sheets

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 CHEMICAL ELEMENT CONTENT (%)

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 WHAT IS ASTM 4140 EQUIVALENT TO?

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 APPLICATION

40Cr alloy steel sheets are widely used in machinery manufacturing, automotive, mold making, and heavy equipment industries. Typical applications include:

• Transmission gears and gear rings

• Drive shafts, connecting rods, axles

• Clutch and brake components

• Mold bases and tool holders

• High-load mechanical parts and flanges

• Agricultural and construction machinery parts

Thanks to its balance of strength and toughness, 40Cr is an ideal material for parts that operate under moderate to high loads and require resistance to shock and wear.