Introduction and Application of 30CRNIMO8, 1.6580, 30NCD8QT Alloy Special Steel:
30CrNiMo8+QT steel, as a high-performance material, has many advantages and is widely used in various fields. This article will provide a detailed introduction to the chemical composition, mechanical properties, physical properties, material advantages, and heat treatment of 30CrNiMo8+QT steel.
30CrNiMo8 material belongs to hardenable alloy structural steel. It has the characteristics of high elasticity and strength, mainly used for heavy-duty components, with a small diameter of up to 1560N/mm2. After softening, the hardness reaches its maximum value. Another characteristic is that it can resist variable loads and impacts. This material is not suitable for welding and requires additional preheating in the end. 30CrNiMo8 heavy-duty components, shafts and drive shafts, steering shafts, engine crankshafts, screws and components.
Standards: EN 10083 | EN 10250 | EN 10269 | DIN 17200
- EN 10083-3:2006 Steel for quenching and tempering. Technical delivery conditions for alloy steel
- EN 10269-1999 Steel and nickel alloys for fasteners with specified high and/or low temperature properties
- EN 10250-3:2000 Open steel die forgings for general engineering purposes. Alloy special steel
- EN 10297-1:2003 Seamless round steel pipes for mechanical and general engineering purposes. Non alloy and alloy steel pipes. Technical delivery conditions
CHEMICAL COMPOSITION (WEIGHT %)
C (％): 0.26 ~ 0.34
Si (％): ≤ 0.40
Mn (％): 0.30 ~ 0.60
P (％)≤: 0.035
S (％)≤: 0.035
Cr (％): 1.80 ~ 2.20
Mo (％): 0.30 ~ 0.50
Ni (％): 1.80 ~ 2.20
Heat treatment process
The heat treatment process is an important processing step for 30CrNiMo8+QT steel, and the optimal mechanical and physical properties can be obtained through a reasonable heat treatment process. Common heat treatment processes include normalizing, tempering, quenching and tempering, etc. The appropriate heat treatment process can be selected according to specific needs.
- Soft annealing: Heat to 650-700 ℃ and slowly cool. This will result in a maximum Brinell hardness of 248.
- Standardization: Temperature: 850-880℃.
- Sclerosis: Harden at a temperature of 830-880℃ and then perform oil quenching.
- Tempering: Tempering temperature: 540-680℃.
30CrNiMo8 / EN1.6580 steel is usually delivered in two common delivery conditions:
1. Annealed (A) 1.6580 steel
2. Quenched and Tempered (QT) 1.6580 Steel
30CrNiMo8+QT steel is widely used in the following fields due to its excellent chemical composition, mechanical properties, physical properties, and material advantages:
1. Automotive industry: used to manufacture engine components, transmission components, etc., to improve the performance and reliability of automobiles.
2. Construction machinery: used to manufacture components for excavators, bulldozers, cranes, and other equipment to improve their performance and durability.
3. Petrochemical industry: used for manufacturing chemical equipment, pipelines, etc., to improve the corrosion resistance and service life of equipment.
4. Aerospace: Used for manufacturing aircraft components, engine components, etc., to ensure the stability and safety of equipment.
5. Other fields: It can also be used to manufacture components such as bearings, gears, hammers, etc., to meet the needs of different fields.
