Round Steel Bar 42CrMo SAE4140

Steel bar is a cylindrical metal product widely used in multiple fields. According to the different materials and purposes, round bars can be divided into multiple types, each with its specific application scenarios and characteristics.

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STEEL BARS

INTRODUCTION42CrMo SAE4140

42CrMo round bar is an alloy structural steel with high strength and good toughness, belonging to the category of ultra-high strength steel. Its main alloying elements include chromium (Cr) and molybdenum (Mo), and the addition of these elements significantly improves the hardenability and tempering stability of the steel, thereby endowing 42CrMo round steel bar with excellent mechanical properties.

SAE4140 is an alloy steel material, belonging to a type of medium carbon low-alloy steel. It has high hardness, toughness, and strength, and is mainly used in the manufacturing of automotive gears and mining machinery products.

Product Profile

The chemical composition of SAE4140 includes approximately 0.38-0.43% carbon, 0.75-1.00% chromium, 0.15-0.35% silicon, 0.60-0.95% manganese, small amounts of phosphorus and sulfur, as well as alloying elements of chromium and molybdenum. This material exhibits extraordinary durability and reliability in various harsh industrial environments due to its high hardness, toughness, and strength.

After appropriate heat treatment, hot rolled steel bar 42CrMo of steel has high yield strength, tensile strength, and impact toughness, while maintaining high elongation and cross-sectional shrinkage, ensuring good plastic deformation ability.

SAE4140learn about

SAE4140 belongs to chromium molybdenum alloy steel, equivalent to the national standard 42CrMo steel, with high strength and resistance, good hardenability, and no obvious temper brittleness. After quenching and tempering treatment, SAE4140 has high fatigue limit and resistance to multiple impacts. It has good low-temperature impact resistance and is suitable for making large and medium-sized plastic molds that require certain strength and resistance.

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applications

SAE4140 and 42CrMo are both chromium molybdenum alloy steels with high strength and resistance, good hardenability, and no obvious temper brittleness. Steel bars are suitable for manufacturing components such as gears, drill bits, shafts, etc., especially in the shipbuilding and oil drilling industries, and are widely used in these fields due to their corrosion resistance.
chemical

The carbon content of SAE4140 and 42CrMo is within a certain range, and they contain appropriate amounts of chromium and molybdenum elements, which help improve the hardness, strength, and corrosion resistance of the materials. Specifically, the chemical composition of SAE4140 includes carbon C: 0.38-0.43%, manganese Mn: 0.75-1.00%, silicon Si: 0.15-0.35%, chromium Cr: 0.80-1.10%, molybdenum Mo: 0.15-0.25%, as well as lower phosphorus P and sulfur S content.

ABOUT US

Tianjin Lishengda Steel Group has always followed international trade practices, adhering to the business philosophy of abiding by contracts, keeping promises, quality service, and mutual benefit. We are willing to sincerely cooperate with friends at home and abroad to develop together.