Chemical composition and mechanical properties of 40CrNiMoA
2025-09-16 11:36:44
40CrNiMoA Chemical Composition and Mechanical Properties, Main Applications
40CrNiMoA
40CrNiMoA is a type of alloy structural steel, also known as a combined steel or alloy steel. It is based on high-quality carbon structural steel with the addition of one or more alloying elements (total content not exceeding 5%). This grade is commonly used in applications requiring high strength, toughness, and durability.
The standard followed is GB/T 3077-1999.
Uniform Number: A50403;
Grade: 40CrNiMoA;
Chemical Composition (%):
Carbon (C): 0.37–0.44
Silicon (Si): 0.17–0.37
Manganese (Mn): 0.50–0.80
Sulfur (S): Residual ≤0.025
Phosphorus (P): Residual ≤0.025
Chromium (Cr): 0.60–0.90
Nickel (Ni): 1.25–1.65
Copper (Cu): Residual ≤0.025
Molybdenum (Mo): 0.15–0.25
â—Mechanical Properties:
Tensile Strength σb (MPa): ≥ 980 (100)
Yield Strength σs (MPa): ≥ 835 (85)
Elongation δ5 (%): ≥12
Area Reduction ψ (%): ≥55
Impact Work Akv (J): ≥78
Impact Toughness αkv (J/cm²): ≥98 (10)
Sample Size: 25mm
Heat Treatment: Quenching at 850°C, oil cooling; Tempering at 600°C, water or oil cooling.
Annealed or High-Temperature Tempered Condition: Brinell Hardness (GBW) ≤269.
Delivery Condition: Can be delivered in heat-treated (normalized, annealed, or high-temperature tempered) or non-heat-treated condition. The delivery condition should be specified in the contract.
Applications: Widely used for high-strength, high-toughness components with large cross-sections, such as eccentric shafts in forging machines and presses.
Image:
Editor: Hardware Business Network Information Center | Source: http://news.chinawj.com.cn
40CrNiMoA
40CrNiMoA is a type of alloy structural steel, also known as a combined steel or alloy steel. It is based on high-quality carbon structural steel with the addition of one or more alloying elements (total content not exceeding 5%). This grade is commonly used in applications requiring high strength, toughness, and durability.
The standard followed is GB/T 3077-1999.
Uniform Number: A50403;
Grade: 40CrNiMoA;
Chemical Composition (%):
Carbon (C): 0.37–0.44
Silicon (Si): 0.17–0.37
Manganese (Mn): 0.50–0.80
Sulfur (S): Residual ≤0.025
Phosphorus (P): Residual ≤0.025
Chromium (Cr): 0.60–0.90
Nickel (Ni): 1.25–1.65
Copper (Cu): Residual ≤0.025
Molybdenum (Mo): 0.15–0.25
â—Mechanical Properties:
Tensile Strength σb (MPa): ≥ 980 (100)
Yield Strength σs (MPa): ≥ 835 (85)
Elongation δ5 (%): ≥12
Area Reduction ψ (%): ≥55
Impact Work Akv (J): ≥78
Impact Toughness αkv (J/cm²): ≥98 (10)
Sample Size: 25mm
Heat Treatment: Quenching at 850°C, oil cooling; Tempering at 600°C, water or oil cooling.
Annealed or High-Temperature Tempered Condition: Brinell Hardness (GBW) ≤269.
Delivery Condition: Can be delivered in heat-treated (normalized, annealed, or high-temperature tempered) or non-heat-treated condition. The delivery condition should be specified in the contract.
Applications: Widely used for high-strength, high-toughness components with large cross-sections, such as eccentric shafts in forging machines and presses.
Image:
Editor: Hardware Business Network Information Center | Source: http://news.chinawj.com.cn
Aluminum external opening door refers to a door that opens outward with aluminum alloy as the main material, and has the following characteristics:
Advantages:
Light weight: The density of aluminum alloy material is relatively low, which makes the overall weight of aluminum external opening door lighter, which is more convenient and labor-saving for both installation and daily use. During the handling and installation process, the physical requirements for construction workers are relatively low, and the load-bearing pressure on the building structure is also reduced.
High strength: After reasonable processing and treatment, aluminum alloy has high strength and can withstand large external forces. Therefore, aluminum external opening doors are sturdy and durable, not easy to deform, can maintain good use status for a long time, and are suitable for various different use environments.
Corrosion resistance: Aluminum alloy has good corrosion resistance. In outdoor environments, it can resist the erosion of natural factors such as rain, sunlight, wind and sand, is not easy to rust or fade, and has a long service life. Even in harsh environments such as humidity, acid and alkali, it can maintain good performance.
Good sealing: High-quality aluminum external opening doors are usually equipped with sealing devices such as sealing strips, which can effectively prevent outdoor dust, rain, noise, etc. from entering the room, improving the comfort and quietness of the room.
Beautiful appearance: Aluminum alloy can be subjected to a variety of surface treatments, such as anodizing, electrophoretic coating, powder coating, etc., which can present different colors and textures to meet the aesthetic needs of different consumers. At the same time, the design styles of aluminum exterior doors are diverse, which can match various architectural styles and enhance the overall aesthetics of the building.
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