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Table of Contents
Introducción
34CrNiMo6
34CrNiMo6 is a high-strength alloy structural steel with chemical composition including carbon, silicon, manganese, phosphorus, sulfur, chromium, nickel, molybdenum and other elements. It has excellent mechanical properties, tensile strength can reach 1100MPa, and yield strength is above 800MPa. After quenching and tempering, the hardness is 36-40HRC. It has good processing and welding properties and is widely used in automobile, aviation, machinery manufacturing and petrochemical industries.
36CrNiMo4
36CrNiMo4 alloy structural steel is an alloy steel with high strength, excellent mechanical properties and heat resistance. It has good mechanical properties and corrosion resistance and is widely used in machinery manufacturing, automobile industry, petrochemical industry and aerospace industries.
Chemical composition
| Grade | C | Si | Mn | P | S | Cr | Ni | Mo |
| 34CrNiMo6 | 0.30-0.40 | 0.20-0.40 | 0.50-0.80 | ≤ 0.025 | ≤ 0.025 | 1.35-1.65 | 1.35-1.65 | 0.25-0.35 |
| Grade | C | Si | Mn | P | S | Cr | Ni | Mo |
| 36CrNiMo4 | 0.32-0.40 | ≤0.40 | 0.50-0.80 | ≤ 0.035 | ≤ 0.035 | 0.90-1.20 | 0.9-1.20 | 0.15-0.30 |
Comparison of H12 and H10 die steel
Common Ground
34CrNiMo6 and 36CrNiMo4 are both chromium-nickel-molybdenum alloy structural steels, and they have many things in common:
Alloying elements: Both steels contain alloying elements such as chromium (Cr), nickel (Ni), and molybdenum (Mo), the addition of which increases the strength and toughness of the steel.
High Strength: They all have excellent strength and hardness, making them suitable for working environments that withstand high loads.
Tratamiento térmico: Both steels can be heat treated to improve their properties, and common heat treatment methods include quenching and tempering to achieve the desired hardness and toughness.
Aplicaciones: Both 34CrNiMo6 and 36CrNiMo4 are widely used in machinery manufacturing, automotive industry, aerospace and other fields to manufacture parts that require high strength and toughness, such as gears, bearings, crankshafts, etc.
Good machinability: Both steels have good machinability and can be manufactured and formed by conventional metalworking methods.
Corrosion resistance: Although not stainless steel, they have better corrosion resistance than ordinary carbon steel.
International standards: There are international standards for both steels, with 34CrNiMo6 complying with EN 10083/1-1991 and 36CrNiMo4 complying with EN 10083/1-1991 and ISO 683-18-2014.
Hardenability: Both steels have excellent hardenability, which allows them to be made into large-sized parts without uneven performance.
Overall, 34CrNiMo6 and 36CrNiMo4 are excellent engineering materials that can play a key role in many applications where high performance is required.
Differences
Although 34CrNiMo6 and 36CrNiMo4 steels are both chromium-nickel-molybdenum alloy structural steels with many similar properties and applications, there are also some key differences between them:
Chemical Composition:
34CrNiMo6 usually contains 0.30%~0.40% carbon, 1.30%~1.70% chromium, 1.30%~1.70% nickel, and 0.15%~0.30% molybdenum. 36CrNiMo4 contains 0.32%~0.40% carbon, 0.90%~1.20% chromium, 0.90%~1.20% nickel, and 0.15%~0.30% molybdenum.
Mechanical properties:
After quenching and tempering, the hardness of 34CrNiMo6 can reach 36~40HRC, and the tensile strength can reach 1100 MPa.
The tensile strength of 36CrNiMo4 is not less than 980 MPa, and the yield strength is not less than 835 MPa.
Hardenability:
34CrNiMo6 has good hardenability and is suitable for manufacturing large parts.
The hardenability of 36CrNiMo4 is also good, but it may be slightly inferior to 34CrNiMo6.
Applications:
34CrNiMo6 is suitable for manufacturing mechanical parts that require high strength and high toughness, such as shafts, gears, connecting rods, etc.
36CrNiMo4 is also used in the manufacture of gears, shafts, piston parts, etc., as well as special wear-resistant parts such as automobiles and aircraft.
Heat treatment:
The heat treatment process of 34CrNiMo6 is 850°C oil quenching and 580°C tempering.
The heat treatment specification of 36CrNiMo4 is quenching temperature 850°C, oil cooling; Tempering temperature 600°C, water-cooled or oil-cooled.
Application scenarios of 34CrNiMo6 and 36CrNiMo4
34CrNiMo6 is a high-strength alloy structural steel with good toughness and hardness, and the main application scenarios include:
Machinery manufacturing: used to manufacture parts such as bearings, gears, couplings, bolts, etc., which require high strength and high toughness.
Automobile industry: suitable for manufacturing engine crankshafts, connecting rods, gears, bearings and other key components.
Aerospace: Due to its high strength and toughness, 34CrNiMo6 is suitable for the manufacture of parts and components in the aerospace field such as aircraft, rockets, and missiles.
Oil & Gas Industry: Used in the manufacture of components that need to withstand high pressures and stresses.
Energy industry: It can be used to manufacture important equipment components in nuclear power plants and chemical plants to ensure reliable operation of equipment in high temperature and high pressure environments.
Marine and Offshore Engineering: Due to its good corrosion resistance, it is suitable for the manufacture of parts in marine environments.
Mining equipment: suitable for manufacturing wear-resistant and impact-resistant components such as transmission shafts of mining equipment
The application scenarios of 36CrNiMo4 steel are very wide, mainly including:
Machinery manufacturing: 36CrNiMo4 is widely used in the manufacture of various mechanical parts and structural parts, such as gears, bearings, crankshafts, connecting rods, etc., which can maintain stable and reliable performance under high loads, high-speed operation and complex stress conditions.
Automotive Industry: In the automotive industry, 36CrNiMo4 is used in the manufacture of critical parts such as engine parts, drivetrain components, and body structures, which play an important role in ensuring vehicle safety and comfort.
Petrochemical: Due to its good corrosion resistance, 36CrNiMo4 has been widely used in the petrochemical industry to manufacture pipes, valves, pumps and other equipment, effectively extending the service life of the equipment and reducing maintenance costs.
Aerospace: In the aerospace sector, 36CrNiMo4 is used as a key structural material due to its excellent high-temperature performance and strength, such as in the manufacture of high-temperature components such as aircraft engine blades, combustion chambers and turbines.
Marine & Offshore: 36CrNiMo4 steel is also suitable for marine and offshore applications, especially in the manufacture of parts that require high strength and good toughness.
Military manufacturing: Due to its excellent mechanical properties and wear resistance, 36CrNiMo4 is also used in the manufacture of some military products.
Which one should I use, 34CrNiMo6 or 36CrNiMo4?
The choice between 34CrNiMo6 and 36CrNiMo4 steel depends on your specific application needs:
Strength and toughness: If you need higher strength and toughness, especially in applications subject to shock loads, 34CrNiMo6 may be a better choice because of its slightly higher yield strength and tensile strength.
Cost-effective: If cost is an important factor, 36CrNiMo4 may be more cost-effective as it is generally more economical than 34CrNiMo6.
Applications: 34CrNiMo6 is often used in the manufacture of important parts such as camshafts and connecting rods of engines, as well as high-strength components in the automotive and aerospace fields.
36CrNiMo4 is commonly used in parts that require high tensile strength, good fatigue resistance and toughness, such as automotive, aerospace and heavy machinery parts.
Heat treatment: Both steels can be heat treated to improve performance, but 34CrNiMo6 may require a more precise heat treatment process to achieve optimal performance.
Soldabilidad: 34CrNiMo6 has poor weldability and is generally not recommended for welding structures, while 36CrNiMo4 may have better weldability.
Hardenability: 34CrNiMo6 has good hardenability and is suitable for manufacturing large parts, while 36CrNiMo4 also has good hardenability, but may be slightly inferior to 34CrNiMo6.
Corrosion resistance: If the application requires high corrosion resistance, although neither steel is known for its corrosion resistance, additional surface treatment or other materials may be required.
Conclusión
34CrNiMo6 and 36CrNiMo4 are both high-performance alloy structural steels for applications that require high strength, toughness, and wear resistance. 34CrNiMo6 has higher strength and hardness, and is usually used in the manufacture of components such as engine camshafts, connecting rods, etc., which are subjected to high loads. 36CrNiMo4 has better toughness and machinability while ensuring a certain strength, and is suitable for gears, shafts, piston parts, etc. The choice of material should be based on the specific application needs, cost considerations, and specific requirements for the performance of the material.
Frequently Asked Questions
Which is more tough, 34CrNiMo6 or 36CrNiMo4?
34CrNiMo6 and 36CrNiMo4 are both high-performance alloy structural steels that are widely used for their strength and toughness. After quenching and tempering, the hardness of 34CrNiMo6 is 36~40HRC, the tensile strength σb is 1100 MPa, the elongation δ is 12%, and the impact toughness value ακ is 8kg/cm². In comparison, the tensile strength σb (MPa): ≥980, the yield strength σs (MPa): ≥835, the elongation δ5 (%): ≥12, the impact energy Akv (J): ≥78, and the impact toughness value αkv (J/cm²): ≥98. This shows that 36CrNiMo4 is slightly better in terms of impact toughness.
Which is more abrasion resistance between 34CrNiMo6 and 36CrNiMo4?
34CrNiMo6 and 36CrNiMo4 are both excellent alloy structural steels, which are widely used for their strength and toughness. 34CrNiMo6 is usually used in the manufacture of components such as engine camshafts, connecting rods and other components that bear high loads. 36CrNiMo4 is commonly used in gears, shafts, piston parts, etc., as well as various special wear-resistant parts for automobiles and aircraft. Both have excellent abrasion resistance, but 36CrNiMo4 may exhibit better abrasion resistance in some applications
Which is more corrosion-resistant, 34CrNiMo6 or 36CrNiMo4?
Both 34CrNiMo6 and 36CrNiMo4 are high-performance alloy structural steels that exhibit good corrosion resistance in industrial applications. 34CrNiMo6 usually has good wear resistance and corrosion resistance because of its high content of chromium and nickel. 36CrNiMo4 (1.6511) is also considered to have excellent corrosion resistance and is suitable for use in a variety of corrosive environments, such as chemical equipment and stone lines. However, if corrosion resistance is particularly emphasized, it may be necessary to consider adding additional corrosion protection measures or coatings, as neither steel is known for its extreme corrosion resistance. When choosing, it is important to determine which material to use based on the specific application environment and performance requirements.
