42CRMO4 +QT Medium Carbon Bearing Steel
42CRMO4 +QT Medium Carbon Bearing Steel
42CRMO4 +QT Medium Carbon Bearing Steel
42CRMO4 +QT Medium Carbon Bearing Steel
42CRMO4 +QT Medium Carbon Bearing Steel

42CRMO4 +QT Medium Carbon Bearing Steel

42CrMo4 Material Number: 1.7225 42CrMo4 standard: EN 10083-3:2006 42CrMo4 Features and Applications: 42CrMo4 material, German grade special steel

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Product Introduction

42CRMO4 +QT medium carbon bearing steel

42CrMo4 is an ultra-high strength alloy structural steel that is widely used in engineering. Its chemical composition, mechanical properties and delivery status are critical to the understanding of material properties and the determination of suitability. This article will discuss the composition content, characteristics and delivery status of 42CrMo4

Chemical Composition:

Carbon (C) : 0.38 ~ 0.45%

Silicon (Si) : ≤0.40%

Manganese (Mn) : 0.50 ~ 0.80%

Sulfur (S) : ≤0.030%

Phosphorus (P) : ≤0.035%

Chromium (Cr) : 0.90 ~ 1.20%

Molybdenum (Mo) : 0.15 ~ 0.30%

Question 1: Why should the carbon content in 42CrMo4 alloy structural steel be controlled between 0.38% and 0.45%?

Explanation 1: Controlling the range of carbon content can provide good toughness and hardenability while ensuring the high strength and hardness of the material. A lower carbon content can reduce the tendency to brittleness, while a higher carbon content can increase the hardness of the material. Therefore, controlling the carbon content between 0.38% and 0.45% can achieve the balance of excellent mechanical properties and processing properties of 42CrMo4 steel.

Question 2: Why does 42CrMo4 alloy structural steel contain chromium and molybdenum, two alloying elements?

Explanation 2: Chromium and molybdenum are the key alloying elements in 42CrMo4 alloy structural steel. The addition of chromium can improve the hardness, strength and corrosion resistance of the steel, while the addition of molybdenum can significantly improve the hardenability and strength of the steel, while improving its high temperature resistance and thermal fatigue performance. The right amount of chromium and molybdenum in 42CrMo4 steel gives it excellent high temperature strength, durability and wear resistance, suitable for engineering applications requiring high strength and toughness.

Question 3:42 What is the delivery status of CrMo4 alloy structural steel?

Explanation 3:42 The delivery state of CrMo4 alloy structural steel mainly includes heat treatment state and annealing state. Specifically, depending on the processing and application needs, steel can be delivered in a heat-treated or annealed state.

Heat-treated condition: Hot-rolled steel is usually delivered in heat-treated condition. Heat treatment can change the structure and properties of steel by controlling the heating temperature and cooling rate. In the heat treatment state, 42CrMo4 steel undergoes a proper heating, insulation and cooling process to obtain the required mechanical properties and organizational structure.

Annealed condition: Cold rolled steel and cold drawn steel are usually provided in annealed condition at the time of delivery. Annealing is done by heating steel to a certain temperature and then slowly cooling it to room temperature to eliminate internal stress and improve the plasticity and toughness of the steel. The annealed steel has more uniform structure and better processing properties.

According to the specific application needs, suppliers and users can choose the appropriate delivery status according to the contract to ensure that the steel can meet the requirements during use.