SNCM220 Alloy Carbon Structural Steel Plate for Bearings

 

SNCM220 is a high-quality alloy steel plate specifically designed for manufacturing bearings and other critical components requiring excellent toughness, fatigue resistance, and surface hardness. It belongs to the nickel-chromium-molybdenum (Ni-Cr-Mo) alloy steel family, known for its superior hardenability and wear resistance. Below is a detailed overview of its properties, applications, and processing characteristics:

1. Chemical Composition

SNCM220's chemical composition is tightly controlled to ensure optimal performance for bearing applications:

 

Element	Content Range (%)	Role
Carbon (C)	0.17–0.23	Provides base hardness and strength through heat treatment.
Silicon (Si)	0.15–0.35	Improves strength and deoxidation during steelmaking.
Manganese (Mn)	0.40–0.70	Enhances hardenability and reduces brittleness.
Phosphorus (P)	≤0.030	Minimized to prevent embrittlement and improve fatigue resistance.
Sulfur (S)	≤0.030	Controlled to improve machinability while maintaining toughness.
Chromium (Cr)	0.40–0.60	Increases hardenability and wear resistance.
Nickel (Ni)	1.60–2.00	Enhances toughness, especially at low temperatures, and improves corrosion resistance.
Molybdenum (Mo)	0.15–0.30	Improves hardenability, high-temperature strength, and resistance to temper brittleness.

 

 

 

 

 

 

Key Characteristics

Excellent Hardenability: The Ni-Cr-Mo alloy system ensures uniform hardness throughout thick sections, critical for large bearings.

High Fatigue Resistance: Nickel and molybdenum improve resistance to cyclic loading, reducing the risk of premature failure in rotating components.

Wear Resistance: Carburizing creates a hard, wear-resistant surface layer while maintaining a tough core to absorb shocks.

Machinability: The balanced alloy composition allows for efficient machining before heat treatment.

 

 

Applications

SNCM220 is primarily used in the production of:

 

Bearings: Rolling elements (balls, rollers) and bearing races for automotive, industrial machinery, and aerospace applications.

Gears: High-strength gears requiring wear resistance and fatigue endurance (e.g., transmission gears in vehicles).

Shafts: Critical shafts subjected to heavy loads and torsional stresses (e.g., drive shafts in machinery).

Other High-Stress Components: Pins, bushings, and fasteners in applications demanding high toughness and durability.

 

 

 

Why Choose Us?
We take pride in our ability to provide custom solutions for our customers' unique needs.
We analyze and compare the previous products and the current technical situation of our SNCM220 Alloy Carbon Structural Steel Plate For Bearings, and develop new technical specifications and processes.
Our customers trust us to deliver high-quality Cold-rolled Steel products on time and on budget.
We strictly implement the warm and thoughtful after-sales service, adhere to the development of good professional ethics.
We offer a wide range of Cold-rolled Steel products to meet diverse customer needs.
We adhere to the customer-centric and brand-oriented business philosophy, and continue to provide customers with reliable and excellent products and services.
Our factory is committed to upholding the highest standards of safety and quality.
All staff of our company and all departments work together to combine business management, professional technology, quantitative statistical methods and ideological education.
Our Cold-rolled Steel products are known for their durability and reliability.
Relying on the superior conditions and strong advantages of mass production, we are able to meet the different needs of our customers.

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