SAE52100 / EN31 Forged Black Surface Engineering Steel Round Bar
GCr15 is a high-carbon chromium bearing steel with low alloy
content, which has high hardness, uniform structure, good wear
resistance and high contact fatigue property after quenching and
► Equivalent grades:
► Chemical Composition(%):
Belong to a kind of high carbon chromium bearing steel which most
widely used width a good performance and less alloy content. High
hardnability and good comprehensive performance. Good machinability
after spheroidizing annealing. High hardness, uniformorganization,
good wear-resistance, high contacr fatigue performance after
quenching and tempering. And good hot working performance.
► Heat treatment:
|Heat treatment system||Steel rod annealing, steel wire annealing or 830-840 degree oil
|Common annealing:||790-810 degree heating, cooling to 650 degrees, air cooling to
|Isothermal annealing:||790-810 degree heating, 710-720 degrees isothermal, air cooling to
|Positive fire:||900-920 degrees heating, air cooling to 270-390HB.|
|High temperature tempering:||650-700 degree heating, air cooling to 229-285HB.|
|Quenching fire:||860 degree heating, oil quenching to 62-66HRC.|
|Low temperature tempering:||150-170-degree tempering, air cooling to 61-66HRC.|
For making all kinds of bearing ring and rolling element. For
example: steel ball roller and ferrule of internal combuxtion
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.
Grade SAE52100 / EN31 / GCr15 is one of the most commonly used
high-carbon chromium bearing steel with high hardenability and high
uniform hardness after heat treatment.High wear resistance is
better than that of GCr9, contact fatigue strength, good
dimensional stability and resistance to corrosion, cold deformation
and plastic medium, machinability, poor weldability, sensitive to
white dot formation, the first kind of temper brittleness.
Guangzhou ChangFeng Steel Co.,Ltd, is located in Guangzhou city, it
was established in 2012,and is an Professional import and export
company with ten years experience of selling special steel, which
mainly sells plastic die steel, hot work die steel, cold work mould
steel, alloy structural steel, bearing steel, tool steel, stainless
steel, carbon steel, etc.
We also act on behalf of exporting steels of mainly steel factories
in China, including Baogang group,Shagang group, Wenfeng group,
Xingcheng group, Dongte group, Daye and so on.We are full of export
experience to the market all over the word, such as America,
Germany, France, Italy, Turkey, Singapore, Thailand, Malaysia,
Vietnam, Taiwan, and Middle-East.
Guangzhou ChangFeng Steel co., Ltd has a lot of experienced and
competent elites and is capable of offering the best service after
years of development.
Our company equips with large-sized Vertical saw machines,
Horizontal saw machines, Milling machines, Grinding machines and
other advanced equipments to provide customers with cutting and
other processing services.
Our all products should be inspected the metallographic analysis,
hardness, ultrasonic flaw detection and other strict inspection
processes, which meet the standards of DIN, AISI, JIS and GB to
ensure their function and quality.