China supplier OEM ASTM 52100 Bearing Steel | 1.3505 | 100Cr6 | SUJ2 | EN31 Factory in New Orleans
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.
Forging Naval Brass for a client in Cape Cod. We set up a desk jig for twisting and employed a fuel forge for the heating of the brass. Doing the job temp is about 850 to 1250. Way too lower and it shatters, much too superior and it “goes away”. A great deal harder than it appears primarily when the substance is in the $seven/lb vary.
Attention-grabbing chemical experiments: http://www.m.chemicum.com/
So today I will notify you about just one uncommon object – the paper clip. This clip is designed from a very uncommon content – nitinol. Nitinol is an alloy of nickel and titanium in proportions of forty five% titanium and fifty five% nickel. This alloy has the one of a kind property that was identified in 1961 by American experts. The property of this alloy is known as “condition memory”. So to demonstrate this property let us carry out an experiment.
Consider a clip of nitinol and deform it. Moreover the clip I as well have a spring designed of nitinol, which I also deform into a random condition.
The activation temperature of nitinol is about forty degrees Celsius. I have turned on the burner on the stove and place the deformed Nitinol clip on its surface.
More than time, while heated, the clip starts to return to its first condition. The similar point occurs with the spring. This occurs because when the temperature modifications the crystal lattice configuration of nitinol modifications from just one phase to yet another.
Also, nitinol is ten periods far more elastic than other metals. Whilst nitinol restores the condition it can also do some do the job. Let us see what type of do the job a little spring of nitinol can make. I have connected the spring to a tripod and hung a porcelain basket on to it, which weighs 118 grams. Subsequent, we stretch the spring. For the spring to be tightened all over again, I will heat it with a lighter. Let us carry on. As you can see, the spring has elevate the basket rather simply. Now we’ll complicate the job. I’m adding metal bars into the basket, and the total excess weight now becomes 278 grams.
Screening the spring. As you can see the spring can simply take care of that job. Adding far more excess weight. I now place the stone and a piece of pyrite into the basket. Total excess weight is now 440 grams. All over again I’m heating the spring and as you can see nothing can quit the electrical power of our spring! In buy to make certain how huge is the electrical power that nitinol makes when restoring the kind, I hung a Youtube silver button on a spring, which weights 825 grams. Striving all over again with heating the nitinol – and what we see is even this massive excess weight can be risen by the spring very simply. Nonetheless, you could now in all probability question if it is these an incredible alloy, why don’t we use it in our each day existence?
The primary downside of nitinol is its significant selling price and the complexity in production and welding. In the 70s experiments ended up carried in the United States on motor styles centered on nitinol and its properties.
Nonetheless, it hasn’t absent additional than the prototype stage. The statement of US management on cons of the venture became the reasoning to reject this thought.
Currently nitinol is generally used in medication for bone bonding. Who is aware of, it’s possible in the long run when the oil runs out, humanity will revert to the nitinol engines?
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