Product Description: Steel Round Bar 1.6657 / 14NiCrMo13-4 / 12Kh2N4A
Steel round bar 1.6657 (14NiCrMo13-4, 12Kh2N4A) is a high-quality alloy structural steel designed for case hardening and subsequent heat treatment. The material provides a strong core combined with a hard, wear-resistant surface, making it ideal for critical mechanical components.
General Technical Characteristics
1.6657 steel is characterized by high strength, good hardenability, and excellent resistance to fatigue loads. After carburizing and quenching, it develops a hard surface layer while maintaining a tough and ductile core.
Key properties:
- high strength
- excellent surface wear resistance
- good core toughness
- high fatigue strength
Chemical Composition
The composition includes alloying elements that ensure superior performance:
- Carbon (C): 0.10–0.17%
- Chromium (Cr): 1.0–1.4%
- Nickel (Ni): 3.0–3.7%
- Molybdenum (Mo): 0.25–0.40%
- Manganese (Mn) and Silicon (Si): in small amounts
Nickel improves toughness, while chromium and molybdenum enhance hardenability and strength.
Mechanical Properties
After heat treatment, the steel typically demonstrates:
- high surface hardness after case hardening
- high core strength
- resistance to wear and fatigue
- reliability under dynamic loads
Applications
1.6657 steel round bar is widely used for manufacturing:
- gears
- shafts and axles
- transmission components
- heavily loaded mechanical parts
It is commonly used in mechanical engineering, automotive, and heavy industry.
Features
Key advantages include:
- combination of hard surface and tough core
- high wear resistance
- excellent fatigue strength
- reliable performance in operation
Supply Formats and Standards
The steel is supplied as round bar:
- hot-rolled bars
- ground or calibrated bars
- various diameters available
The material complies with:
- EN 10084 (1.6657 / 14NiCrMo13-4)
- GOST 4543 (12Kh2N4A)
Steel round bar 1.6657 is an optimal choice for producing critical components operating under high loads, where strength, wear resistance, and durability are essential.
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