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High Carbon Chromium Alloy Steel Round Bar GCr15 / EN31 For Mechanical
GCr15 is a high carbon chromium bearing alloy steel with low alloy content.
It has high hardness, uniform structure, good wear resistance and high contact fatigue after quenching and tempering.
Equivalent grades
| GB | DIN | AISI | JIS |
| GCr15 | 1.3503 | SAE52100 | SUJ2 |
Chemical Composition(%)
| C | Si | Mn | Cr | Mo | Ni | Cu | P | S |
| 0.95-1.05 | 0.15-0.35 | 0.25-0.45 | 1.4-1.65 | ≤0.1 | ≤0.30 | ≤0.030 | ≤0.035 | ≤0.035 |
Features
Belong to a kind of high carbon chromium bearing steel which most widely used width a good performance and less alloy content.
High hardenability and good comprehensive performance. Good machinability after spheroidizing annealing.
High hardness, uniformorganization, good wear-resistance, high contact fatigue performance after quenching and tempering. And good hot working performance.
Applications
For making all kinds of bearing ring and rolling element.
For example: steel ball roller and ferrule of internal combustion engine, electric motorcycle, automonilrd, tractors, machine tools, rolling mill, boring machine, mining machinery, general machinery, high load and high speed roating mechancial transmission bearing.
Except ball bearing and bearing ring, sometimes also used to make tools, such as pumching die, measuring tool.
Delivery condition
Hot rolled or forged, black surface
Hardenss: annealed to 207-229HB
The main features and uses
After quenching and tempering high hardness and uniform, wear resistance, anti-lift fatigue strength. Hot workability is good. Good machinability after spheroidizing annealing, but sensitive to white spots.
Mainly used in the manufacture of internal combustion engines, electric locomotives, machine tools, tractors, rolling equipment, drilling machines, railway vehicles and mining machinery and other drive shaft on the ball, roller and sleeve, etc.
More about GCr15 high carbon alloy steel
The steel cold plastic medium, cutting performance in general, poor welding performance, the formation of white point sensitive performance, temper brittleness.
GCr15 is the most commonly used high-carbon chromium bearing steel with high hardenability and high and uniform hardness after heat treatment.
Abrasion resistance is superior to GCr9, high contact fatigue strength, good dimensional stability and corrosion resistance, cold deformation plasticity, general machinability, poor weldability, sensitive to the formation of white spots, the first temper brittleness.
In the manufacture of ball bearings, for rolling the wall thickness of 12mm. Outer diameter <250mm H-class to C-level bearing sleeve, 25.4-50.8mm diameter ball; diameter <22mm roller, but also can be used as bearing Large load. High wear resistance.
High elastic limit. High contact fatigue strength of other mechanical parts and precision measuring tools such as cold die.
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metal cutting, sizing, machining (blanking, milling, grinding), and heat treatment.
Sawing for small or large quantities, sawing-to-size.
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