High Strength CD4MCu Round Steel 0Cr26Ni5Mo2Cu3 Forged Duplex Stainless Steel

Product Specification

High Strength CD4MCu Round Steel 0Cr26Ni5Mo2Cu3 Forged Rod Duplex Stainless Steel Rod.

Material introduction: Full name of brand: 0Cr26Ni5Mo2Cu3
Alloy CD-4MCu is nominally 26Cr-6Ni alloy (C≤0.04) with molybdenum and copper added. There is no corresponding deformed steel for this alloy. Alloy CD-4MCu is a two-phase structure in the cast state, consisting of austenite distributed in a ferrite matrix. Although carbide precipitation is limited by the minimum carbon content of the alloy, if it is not eliminated by solution treatment, it will also be dispersed in the ferrite matrix, thereby reducing corrosion resistance. The solution treatment temperature of CD-4MCu is 1120℃, and it is kept warm for at least two hours to ensure uniform temperature, and then slowly cooled to 1010~1065℃, kept warm for half an hour, and then quenched. Keeping warm at a lower temperature is to avoid cracking of castings (especially castings with thicker sections) during quenching. The structure after heat treatment is also two-phase, containing 35~40% austenite in the ferrite matrix.
Alloy CD-4MCu is basically ferritic, with a yield strength of about twice that of 19Cr-9Ni austenitic alloy, and has high hardness, good tensile plasticity and satisfactory impact toughness. The high strength and hardness of the alloy are combined with excellent corrosion resistance, making it particularly suitable for use under corrosive (including abrasion and erosion) working conditions. Alloy CD-4MCu has better corrosion resistance than CF alloy in many corrosive media, and is widely used in strong acid working conditions of oxidation and reduction, and has special resistance to stress corrosion cracking in chlorine environments.
After solution treatment, CD-4MCu alloy can be further strengthened by precipitation hardening caused by aging at 480-510℃. The degree of aging reaction, as well as all the properties of the alloy in the aged state, including corrosion resistance, strength, impact toughness and quenching cracking tendency are related to the complex phase treatment method, that is, the high or low solution treatment temperature, aging temperature and aging time. Because the alloy has sufficient strength and excellent corrosion resistance in many applications after solution treatment, it is not often used in the aged state.

The chemical composition of CD4MCu mainly includes the following elements and their contents: ‌
‌Carbon (C)‌: ≤0.04% ‌

Manganese (Mn)‌: ≤1.0% ‌

Silicon (Si)‌: ≤1.0% ‌

Phosphorus (P)‌: ≤0.04% ‌

Sulfur (S)‌: ≤0.04% ‌

Chromium (Cr)‌: 24.5% - 26.5% ‌

Nickel (Ni)‌: 4.75% - 6.00% ‌

Molybdenum (Mo)‌: 1.75% - 2.25% ‌

Copper (Cu)‌: 2.75% - 3.25% ‌

These chemical compositions are the basis of CD4MCu's performance, giving it excellent corrosion resistance and mechanical properties. CD4MCu is a high-performance cast duplex stainless steel, widely used in chemical, papermaking, food processing, marine engineering and other fields, especially in the manufacture of pumps, valves and other components.

The hardness of CD4MCu stainless steel is usually between HB200-320 and the density is about 7.8g/cm³.

Advantages and Disadvantages of Corrosion Resistant Alloy CD4MCu.

Corrosion Resistant Alloy CD4MCu is an alloy material with excellent performance in high temperature and corrosive environments. It is composed of a variety of elements, including chromium, nickel, cobalt, tungsten, etc., which give CD4MCu excellent corrosion resistance and high temperature strength properties. However, like any material, CD4MCu also has its own advantages and disadvantages.

Advantages:

1. High temperature strength: CD4MCu can still maintain high strength at high temperatures, making it an ideal choice for equipment that needs to withstand high temperatures and heavy loads.

2. Corrosion resistance: The alloy has excellent corrosion resistance and can resist erosion by various acids, alkalis, salts and other chemicals. This makes CD4MCu widely used in chemical, petroleum, pharmaceutical and other fields.

3. Good welding performance: CD4MCu is easy to weld, and the material properties remain good after welding. This reduces the difficulty of maintenance and repair and improves the reliability of equipment.

4. Long life: Due to its excellent corrosion resistance and high temperature strength properties, CD4MCu has a long service life, reducing the frequency and cost of equipment replacement.

5. Good processing performance: CD4MCu is easy to process and manufacture, and can adapt to various complex shapes and structures. This reduces the difficulty and cost of manufacturing.

Disadvantages:

1. High cost: Since CD4MCu is a high-performance alloy material, its manufacturing cost is high. For some projects that require a large amount of this material, the budget may be limited.
2. Brittleness: CD4MCu may exhibit brittleness under certain conditions, which may cause sudden cracks or breaks in the equipment during operation. Therefore, special attention should be paid to its operating environment and conditions when using CD4MCu.
3. Sensitivity and environmental factors: CD4MCu is sensitive to certain chemicals and environmental factors, such as chloride ions, hydrogen sulfide, etc. Special attention should be paid to these factors when using CD4MCu to avoid adverse effects on its performance.

In short, the corrosion-resistant alloy CD4MCu has many advantages, making it an ideal choice in many fields. However, it is also necessary to pay attention to its disadvantages and take corresponding measures to ensure its safe and reliable use. When selecting and using CD4MCu, it is necessary to evaluate and make decisions based on actual needs and conditions.