14 Years manufacturer ASTM 52100 Bearing Steel | 1.3505 | 100Cr6 | SUJ2 | EN31 Manufacturer in America
ASTM A295 is specification which covers 52100 high carbon bearing quality steelto be used in the manufacture of anti-friction bearings. And 52100 bearing steel is the most common steel grade in ASTM A295 standard for high-carbon anti-friction bearing steel. What is 52100 bearing steel? AISI/ASTM 52100 bearing steel is a high carbon, chromium containing low alloysteel that is through hardening and noted in particular for use asbearings. 52100 bearing steel is one kind of special steel with ...
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is specification which covers 52100 high carbon bearing quality steel
to be used in the manufacture of anti-friction bearings. And is the most common steel grade in ASTM A295 standard for high-carbon anti-friction bearing steel.
What is 52100 bearing steel?
52100 bearing steel is a high carbon, chromium containing low alloy
steel that is through hardening and noted in particular for use as
52100 bearing steel is one kind of special steel with features of
high wear resistance and rolling fatigue strength. High-carbon chromium
bearing steel, engineering steel and some types of stainless steel and
heat resistant steel are used as materials of bearings and for other
Advantages of Chrome Bearing Steel 52100:
Superior hardness, 60-67 on Rockwell hardness scale (Rc) at room temperature
High carbon chrome alloy steel
Operates continually at temperatures up to 120°C
Used to produce precision ball bearings and roller bearings
Long working life
1. Relevant Steel Specification of ASTM 52100 Bearing Steel
|Standard||ASTM A295||DIN 17230|
2. Chemical Composition of 52100 Bearing Steel and Equivalents
3. Mechanical Properties of ASTM A295 52100 Bearing Steel
|Bulk modulus (typical for steel)||140 GPa||20300 ksi|
|Shear modulus (typical for steel)||80 GPa||11600 ksi|
|Elastic modulus||190-210 GPa||27557-30458 ksi|
|Hardness, Knoop (converted from Rockwell C hardness)||875||875|
|Hardness, Rockwell C (quenched in oil from 150°C tempered)||62||62|
|Hardness, Rockwell C (quenched in water from 150°C tempered)||64||64|
|Hardness, Rockwell C (quenched in oil)||64||64|
|Hardness, Rockwell C (quenched in water)||66||66|
|Hardness, Vickers (converted from Rockwell C hardness)||848||848|
|Machinability (spheroidized annealed and cold drawn. Based on 100 machinability for AISI 1212 steel)||40||40|
52100 Steel Physical Properties
|Density||7.81 g/cm3||0.282 lb/in³|
52100 Alloy Steel Thermal Properties
|Thermal expansion co-efficient (@ 23-280°C/73.4- 36°F, annealed)||11.9 µm/m°C||6.61 µin/in°F|
|Thermal conductivity (typical steel)||46.6 W/mK||323 BTU in/hr.ft².°F|
4. Forging of A295 52100 Bearing Steel
52100 alloy steel is forged at 927 to 1205°C, and should not be forged
below 925ºC. A post-forge equalization treatment is recommended at 745ºC
for 4-6 hours followed by air cooling for SAE/AISI 52100 steel.
6. Heat Treatment for ASTM 52100 Bearing Steel
52100 alloy bearing steel is heated at 816°C followed by quenching in
oil. Before performing this process, it is subjected to normalizing heat
treatment at 872°C followed by slowly cooling in order to reduce the
AISI 52100 bearing steels alloy can be hot worked at 205 to 538°C.
AISI 52100 bearing steel can be cold worked using conventional techniques in the annealed or normalized conditions.
For spheroidize anneale, the following isothermal anneal is recommended:
1500ºF (815ºC) for 3 hours
1350ºF (735ºC) for 4 hours
1250ºF (675ºC) for 3 hours
Slow cool to 1000ºF (540ºC) then air cool.
AISI 52100 alloy bearing steel could be hardened by quenching in water from 801-829 degree or quench in oil from 816-842 degree.
Temper to desired hardness as indicated by tempering curves after water or oil quench.
5. Applications of 52100 Bearing Steel
steel 52100 grade bearing steel is mainly used for the manufacture of
aircraft bearings and other highly stressed parts. This steel grade
52100 steel is preferably vacuum arc re-melted to give optimum
Typical applications: Bearing Manufacture, CV joints, ball screws, gauges, knife etc.
What is Coltan?
Coltan is limited for Columbite-tantalite – a black tar-like mineral identified in major portions in the Congo. The Congo possesses 64 p.c of the world’s coltan. When coltan is refined it turns into a warmth resistant powder that can keep a high electrical cost. The attributes of refined coltan is a very important ingredient in developing products that shop strength or capacitors, which are utilized in a extensive array of compact digital products, particularly in cell phones, laptop computer systems, pagers, and other digital products.
I, Wemba-koy Okonda citizen of the Democratic Republic of Congo and the President of OKONDA NON GOVERNMENTAL Corporation plead to you on the behalf of my folks. There are ONLY six,000,000 Congolese lifeless so much from the war that you are supporting if you are a consumer of mobile telephone, pc, participate in station etcetera… I claimed “ONLY” for the reason that you ended up silent right up until now and continue being silent as you are reading through this. You are not standing up for my folks.
Foreign Company exploitation
Despite the fact that the countries pointed out earlier mentioned immediately exploit coltan, foreign multi-national firms have been deeply concerned in the exploitation of coltan in the Congo. The coltan mined by rebels and foreign forces is bought to foreign firms. Despite the fact that, the United Nations in its studies on the Congo do not immediately blame the multi-national firms for the conflict in the Congo, the United Nations does say that these businesses serve as “the engine of the conflict in the DRC.”
So how many extra do you want to be killed? Have to have I provide up that Hitler experienced six,000,000 Jewish folks killed? I was there when you stood up for the killing in Iraq, the killing in Mumbai, the killing in New York (9/eleven), the killing in France, the killing in Spain etcetera… but why can’t you stand up for my folks? I am crying right now with suffering. What can I do? I am just a straightforward black guy and a fellow Congolese without the need of ability. Due to the fact I am so weak, to consolate myself I am just crying for my folks.
Day to day there is terrible information from my residence nation. What have my folks carried out to you that you are not able to forgive????? That cellphone you are applying has the blood of my folks. It is a weapon from my folks. Make sure you, I am not inquiring you to toss absent your technologies, but I am inquiring you to stand up for my folks. The six,000,000 “ONLY” Congolese lifeless are adequate. I can not afford just one extra loss of life.
The population of the State of Washington (U.S.A.) is six,395,798. Think about six,000,000 Congolese lifeless. If you took six,395,798 – six,000,000(fatalities) you would be remaining with 395,798 folks.
We all are the folks of the planet, but why are you excluding my folks as citizens of the planet? By the way, if your cellphone rings think about individuals that are lifeless for the reason that of “COLTAN”, the source of war in the Democratic Republic of Congo.
What are some of the makes use of of coltan in fashionable modern society?
• Notebook computer systems
• Mobile phones
• Jet engines
• Cutting resources
• Camera lenses
• X-ray movie
• Ink jet printers
• Hearing aids
• Airbag safety systems
• Ignition and motor control modules, GPS, Stomach muscles systems in vehicles
• Video game consoles these types of as playstation, xbox and nintendo
• Video cameras
• Digital however cameras
• Sputtering targets
• Chemical approach products
• Cathodic safety systems for steel constructions these types of as bridges, water tanks
• Prosthetic products for people — hips, plates in the skull, also mesh to mend bone taken out immediately after problems by most cancers
• Suture clips
• Corrosion resistant fasteners, screws, nuts, bolts
• High temperature furnace parts.
• High temperature alloys for air and land based mostly turbines
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