Equivalent to GCr15 steel, chemical composition, mechanical properties

Introduction to GCr15 Bearing Steel

GCr15 steel is one of the most commonly used Chinese bearing steels, it is a high carbon and chromium bearing steel with high hardenability, high and uniform hardness after heat treatment, high resistance to contact fatigue, good dimensional stability and resistance to corrosion. The cold deformation plasticity is average, the machinability is general, the weldability is poor and is sensitive to the formation of white spots, and there is a first type of tempering brittleness.

Datasheet and specifications

Chemical Composition of GCr15 Steel

Mechanical Properties of GCr15 Bearing Steel

GCr15 material hardness

• Spheroidizing annealing hardness: 179-207 HBW
• Softening annealing hardness: ≤245 HBW

Bending Steel for GCr15 Bearings

• Hot rolled round steel: ≤3mm/meter; Total flexion: ≤0.3% x length
• Hot-rolled annealing round steel: ≤3mm/meter; Total flexion: ≤0.3% x length
• Calcined round steel: ≤5mm/meter; Total flexion: ≤0.5% x length
• Cold drawn round steel (Φ≤25mm): ≤2mm/meter; Total flexion: ≤0.2% x length
• Cold drawn round steel (Φ>25mm): ≤1.5mm/meter; Total flexion: ≤0.15% x length

Forms

GCr15 bearing steel is used to manufacture various bearing bushings with wall thickness ≤12mm and outer diameter ≤250mm, steel balls with diameters of 25.4-50.8mm; also used for other rolling elements with a wide range of sizes, such as tapered rollers, cylindrical rollers, spherical rollers, needle rollers, etc.; also used in the manufacture of molds, precision gauges and other mechanical parts that require high wear resistance, high elastic limit and high contact fatigue resistance.

Equivalent

GCr15 steel equivalent to US AISI SAE ASTM, European EN, German DIN, Japanese JIS, British BSI, France NF and ISO standard.

You may also be interested in GCr15 vs 52100, 100Cr6 and SUJ2 steel.

Notes: DIN 17230 is covered by DIN EN ISO 683-17, NF A35-565 is covered by NF EN ISO 683-17.