GCr15 Carbon Steel Plate is a high-carbon chromium bearing steel designed for the manufacture of high-precision, high-load bearings and related parts. It is mainly composed of carbon, chromium, silicon, manganese, and other elements, and is widely used in many fields such as machinery manufacturing, automobiles, aerospace, precision instruments, etc.
Feature
High hardness
GCr15 Carbon Steel Plate has a high carbon content, which allows a large number of high-hardness carbides to form in the steel. After quenching and tempering, its hardness can reach 61-65 HRC.
Excellent fatigue performance
GCr15 Carbon Steel Plate has a uniform microstructure and an appropriate amount of chromium, which reduces stress concentration points and enhances the fatigue resistance of steel. Its fatigue life is 50% higher than that of conventional steel, and it can withstand frequent alternating loads such as automobile engine crankshaft bearings to ensure stable operation.
Good dimensional stability
GCr15 Carbon Steel Plate forms a stable organizational structure and has low residual stress after heat treatment. Its phase change and organizational transformation are relatively uniform. After tempering, it can effectively eliminate the residual stress generated during quenching. This allows the GCr15 Carbon Steel Plate to maintain its shape and size under different temperature and load conditions.
Chemical Composition (%)
|
C |
Cr |
Mn |
Si |
P≤ |
S≤ |
|
0.95-1.05 |
1.40-1.65 |
0.25-0.45 |
0.15-0.35 |
0.025 |
0.025 |
Steel Grade
|
China (GB) |
International (ISO) |
Germany (DIN) |
USA (ASTM/AISI) |
Japan (JIS) |
UK (BS) |
France (NF) |
|
GCr15 |
100Cr6 |
1.3505 |
52100 |
SUJ2 |
535A99 |
100C6 |
Main Application
|
Application Category |
Specific Components & Uses |
|
Bearing Components (Primary Use) |
• Ball & Roller Bearings (automotive, aerospace, industrial) |
|
• Bearing Rings & Raceways |
|
|
• Precision Bearing Balls |
|
|
• Thrust Bearings |
|
|
Precision Machinery & Tools |
• Measuring Instruments (gauges, calipers, micrometers) |
|
• High-Precision Gears & Shafts |
|
|
• Camshafts & Cam Followers |
|
|
• Hydraulic Pump Components |
|
|
Cutting & Stamping Tools |
• Blades & Cutting Dies (paper, plastic, thin metal) |
|
• Punch Pins & Wear Plates |
|
|
• Knives for Industrial Machinery |
|
|
Automotive & |
• Transmission Components (gears, synchronizer rings) |
|
Aerospace |
• Fuel Injection System Parts |
|
Industrial Wear- |
• Landing Gear Components (secondary structural parts) |
|
• Guide Rails & Linear Motion Systems |
|
|
Resistant Parts |
• Wear Plates for Heavy Machinery |
|
• Roller Conveyor Systems |
Heat Treatment
|
Annealing (Softening): ~790-810°C, slow cooling for machinability.
Quenching: ~830-850°C, oil cooling for high hardness.
Tempering: 150-180°C to reduce brittleness while retaining hardness. |
Specifications
|
Category |
Specification Details |
|
Standard |
GB/T 18254 (China), ASTM A295 (USA), ISO 683-17 (International) |
|
Material Equivalent |
AISI 52100 (USA), DIN 100Cr6 (Germany), JIS SUJ2 (Japan) |
|
Chemical Composition |
C: 0.95-1.05%, Cr: 1.30-1.65%, Si: 0.15-0.35%, Mn: 0.25-0.45%, P≤0.025%, S≤0.025% |
|
Density |
7.81 g/cm³ |
|
Hardness |
Annealed: ≤179 HB, Quenched & Tempered: 61-65 HRC |
|
Tensile Strength |
2000 MPa (after heat treatment) |
|
Yield Strength |
1500 MPa (after heat treatment) |
|
Elongation |
~5% (after heat treatment) |
|
Impact Toughness |
~20 J/cm² |
|
Thermal Conductivity |
46.6 W/(m·K) at 20°C |
|
Heat Treatment |
Annealing: 790-810°C, Quenching: 830-850°C (oil cooling), Tempering: 150-180°C |
|
Plate Thickness |
1mm - 100mm (custom sizes available) |
|
Width Range |
1000mm - 2000mm (standard) |
|
Length |
2000mm - 6000mm (standard) |
|
Surface Finish |
Cold rolled, ground, or polished (Ra 0.4-3.2μm available) |
|
Tolerances |
Thickness: ±0.05mm, Width: ±1mm, Length: ±5mm |
|
Weldability |
Poor (not recommended for welding applications) |
|
Corrosion Resistance |
Low (requires protective coatings for corrosive environments) |
|
Main Applications |
Bearings, precision machinery, cutting tools, and automotive components |
FAQ
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