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Stainless Bearing Steel

Overview

Our stainless bearing steel is specifically engineered for the production of high-performance bearings, offering exceptional corrosion resistance and wear durability. We provide two primary types to meet diverse application needs: High-Carbon Chromium Stainless Bearing Steel and High-Temperature Stainless Bearing Steel, each tailored for distinct environmental conditions and operational requirements.

High-Carbon Chromium Stainless Bearing Steel

This grade is characterized by its elevated carbon content (typically ranging between 0.95%-1.10%) and chromium infusion (approximately 1.40%), resulting in superior hardness (reaching HRC 64-66) and wear resistance. Coupled with excellent corrosion resistance, it is ideal for applications requiring high load-bearing capacity and high-speed operation, such as in industrial motors and automotive engines.

High-Temperature Stainless Bearing Steel

Designed for use in extreme temperature environments, this stainless bearing steel maintains excellent mechanical properties and corrosion resistance at temperatures up to 300°C. It is perfect for demanding applications such as automotive turbochargers, aerospace engines, and industrial furnaces, where both high temperature and corrosion resistance are critical.

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Characteristics

Outstanding Corrosion Resistance:Extends bearing lifespan, maintaining stable performance for over 5,000 hours in saltwater environments.
High Wear and Fatigue Resistance:Tested to maintain excellent performance even after 50 million revolutions under high load conditions.
Temperature Stability:High-Temperature Stainless Bearing Steel exhibits less than 5% performance degradation at 300°C.
Balanced Hardness and Toughness:Ensures bearing reliability through optimized heat treatment processes that achieve the ideal combination of hardness and toughness.

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Production Process

Our stainless bearing steel is produced using advanced electric furnace smelting technology to ensure material purity and uniformity. The precise heat treatment process, including oil quenching and air tempering, enhances the steel’s hardness and toughness. Additionally, precision rolling and cold drawing techniques are employed to guarantee the final product’s high dimensional accuracy (tolerances up to ±0.02mm) and superior surface finish (surface roughness Ra ≤ 0.8μm).

Applications

Automotive Industry:Used in engine, transmission, and hub bearings. For example, a specific car engine bearing has demonstrated outstanding performance even after 100,000 kilometers of continuous operation.
Industrial Machinery:Suitable for high-load and high-speed machinery, such as large pumps and fan bearings.
Aerospace:Bearings used in high-temperature and high-pressure environments, such as in a certain aerospace engine, have shown no performance degradation after 100 hours of simulated flight conditions.
Home Appliances:Applied in small bearings for washing machines, refrigerators, and other household appliances, enhancing durability and extending maintenance cycles.

Common Sizes

Round Steel Bar:

Diameter: 20-120mm

Length: 4000-9000mm

The above specifications are common sizes; we can provide custom services according to customer requirements.

Chemical Composition

High Carbon Chromium Stainless Bearing Steel
NO.	Grade	Chemical Composition (Mass Fraction) /%
NO.	Grade	C	Si	Mn	P	S	Cr	Mo	Ni	Cu
1	G95Cr18	0.90~ 1.00	≤0.80	≤0.80	≤0.035	≤0.020	17.0~ 19.0		≤0.25	≤0.25
2	G65Cr14Mo	0.60~ 0.70	≤0.80	≤0.80	≤0.035	≤0.020	13.0~ 15.0	0.50~ 0.80	≤0.25	≤0.25
3	G102Cr18Mo	0.95~ 1.10	≤0.80	≤0.80	≤0.035	≤0.020	16.0~ 18.0	0.40~ 0.70	≤0.25	≤0.25

High-Temperature Stainless Bearing Steel
NO.	Grade	Chemical Composition (Mass Fraction) /%
NO.	Grade	C	Si	Mn	P	S	Cr	Mo	V	Ni	Cu
1	G105Cr14Mo4	1.00~ 1.10	0.20~ 0.80	0.30~ 0.80	≤0.015	≤0.010	13.00~ 15.00	3.75~ 4.25	≤0.20	≤0.25	≤0.20
2	G115Cr14Mo4V	1.10~ 1.20	0.20~ 0.40	0.30~ 0.60	≤0.015	≤0.010	14.00~ 15.00	3.75~ 4.25	1.10~ 1.30	≤0.25	≤0.20

Comparison of Steel Grades by Country

High Carbon Chromium Stainless Bearing Steel
NO.	GB	ASTM A 756—2009 (2014)	ISO 683-17:2014	DIN	JIS
1	G65Cr14Mo
2	G95Cr18(9Cr18)			X105CrMo17	SUS440C
3	G102Cr18Mo(9Cr18Mo)	440C/X108CrMol7	X108CrMol7	X105CrMo18	SUS440C

High-Temperature Stainless Bearing Steel
NO.	GB	ISO	AISI	DIN	JIS
1	G105Cr14Mo4		440B/440C	X90CrMoV18	SUS440B
2	G115Cr14Mo4V		440C	X105CrMo17	SUS440C

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