Whatsapp
Whatsapp
High-Strength 18Cr2Ni4WA Alloy Steel - Top China Suppliers and Factory Available
Description
18Cr2Ni4WA is a critically important low-carbon, high-grade alloy carburizing structural steel, frequently used in components such as shearer sprockets, heavy-duty truck transmission gears, and hammer rods for electro-hydraulic hammers, operating in harsh environments. Its exceptional comprehensive mechanical properties have earned it an irreplaceable position in key sectors such as aerospace, defense, and heavy machinery. The material described in this article strictly adheres to the national military standard, "GJB1951-94 Technical Specifications for Carburizing Gear Steel for Aviation," and is smelted using the electroslag remelting (ESR) process, ensuring high purity, density, and excellent transverse mechanical properties.
Chemical Composition & Treatment
This steel's chemical composition is unique: a low carbon content ensures high toughness and excellent processing properties in its core; while the rich content of chromium (Cr), nickel (Ni), and added tungsten (W) together give the steel an excellent balance of hardenability, strength, and toughness. After carburizing or carbonitriding surface treatment, the workpiece surface can achieve extremely high hardness, excellent wear resistance, and fatigue resistance, while the core still maintains extremely high strength and good toughness, sufficient to withstand significant impact loads and bending stresses.
Electroslag Remelting (ESR) Process
Crucially, the electroslag remelting process significantly improves material quality. The ESR process effectively removes harmful inclusions, significantly improving the steel's purity. It also eliminates defects such as porosity and segregation that are common with conventional smelting methods, resulting in a more uniform and dense structure. This means that components manufactured from this material (such as heavy-duty gears, shafts, turbine engine transmission components, and aircraft landing gear) have higher reliability, longer fatigue life, and superior performance stability, fully meeting the stringent requirements of extreme operating conditions.
In summary, the electroslag grade 18Cr2Ni4WA material that meets the GJB1951-94 standard represents the first-class level of domestic alloy structural steel manufacturing and is an ideal choice for manufacturing high-load, high-reliability core key components.
Frequently Asked Questions
What is 18Cr2Ni4WA steel?
18Cr2Ni4WA is a low-carbon, high-grade alloy carburizing structural steel designed for manufacturing high-load, high-reliability key components operating in harsh environments.
What standard does this material adhere to?
The material strictly adheres to the Chinese national military standard, "GJB1951-94 Technical Specifications for Carburizing Gear Steel for Aviation."
What are the benefits of the Electroslag Remelting (ESR) process?
The ESR process removes harmful inclusions, improves structural purity and density, eliminates porosity and segregation, and ensures excellent transverse mechanical properties.
How does the chemical composition affect its performance?
Low carbon content provides high core toughness, while chromium, nickel, and tungsten offer a balanced combination of hardenability, strength, and wear resistance.
What are the typical applications of 18Cr2Ni4WA?
It is commonly used for heavy-duty gears, shafts, shearer sprockets, turbine engine transmission components, electro-hydraulic hammer rods, and aircraft landing gear.
How does surface treatment improve this steel?
After carburizing or carbonitriding, the surface gains extreme hardness and wear resistance, while the core maintains the strength and toughness needed to withstand high impact loads.