
Alloy Engineering Steel Bar Bearing Steel Round Bar GBGCR15/DIN
EN31/ SUJ2/100Cr6/AISI 52100
Product Introduction
Alloy 52100 bearing quality / aircraft quality dual certified steel
is a moderately deep hardening alloy having high resistance to
wear, medium toughness, and low resistance to softening at high
temperatures. It is an oil hardening high Carbon - Chromium alloy
that develops high surface hardening.
52100 Premium Quality VAR is 52100 melted twice (vacuum arc
remelted) and is used in various bearing applications for aircraft
or other critical parts. It has excellent wear and abrasion
resistant qualities and can also be used in place of tool steels.
It has the same basic properties as 52100 but the VAR melting
provides extreme cleanliness.
EN31 is a very high strength steel alloy which is hardened and
tempered before supplying and has nickel, chromium, molybdenum
making it high tensile steel strength, with good ductility and wear
resistance. With relatively good impact properties at low
temperatures, EN31 is also suitable for a variety of elevated
temperature applications. EN31 round bars have good internal
strength and high external strength, which makes it highly wear
resistant. EN31 steel round bars offer good combination of
ductility, strength and wear resistance. EN31 is a very high
strength alloy engineering steel.
Advantages/Features
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
Cost-effective
Long working life
Similar Standards
Chinese | American | German | Japanese |
GB | AISI | DIN | JIS |
GCr15 | SAE52100 | 100Cr6/EN31 | SUJ2 |
Chemical Composition
Grades | C | Si | Mn | P | S | Cr | Mo | Cu | Ni |
GCr15/52100 | 0.95-1.05 | 0.15-0.35 | 0.2-0.4 | ≤0.027 | ≤0.02 | 1.3-1.65 | ≤0.1 | ≤0.25 | ≤0.3 |
100Cr6 | 0.95-1.05 | 0.15-0.35 | 0.25-0.45 | ≤0.025 | ≤0.025 | 1.4-1.65 | ≤0.08 | ≤0.25 | ≤0.3 |
Heat Treatment
Quenching | Tempering | ||||
Heating Temperature/℃ | Cooling | Hardness/HRC | Heating Temperature/℃ | Cooling | Hardness/HRC |
830-850 | Oil | 62-65 | 150-190 | Air | 58-62 |
Mechanical Properties of ASTM A295 52100 Bearing Steel
Properties | Metric | Imperial |
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 |
Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
Hardness, Brinell | – | – |
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 |
General Applications
1. 1 For making all kinds of bearing ring and rolling element, such
as steel ball roller and ferrule of inernal combustion engine,
electric motorcycle, automonilrd tractors, machine tools, rolling
mill, boring machine, mining machinery, general machinery, high
load and high speed roating mechanical transmission bearing.
2. 2. Sometimes also used to make tools, such as pumching die and
measuring tools
3. 3The automotive and aircraft industry use Alloy Steel 52100 for
a number of different applications including:
Stock Size
Round Bar | Diameter | 16-280mm |
Length | 4000-10000mm | |
Flat Steel | Thickness | 8-200mm |
Length | 3000-4000mm |
Why choose us?
Quality Assurance from government owned steel mills
At die & tool steel , we meticulously source materials only
from steel manufacturers to ensure consistency in providing the
finest quality steel products for our customers.
Being in the competitive market today, we clearly understand that
customers are looking for products that are not only best in class
but also affordably priced. We are confident that we are able to
ful fil these two equally vital aspects –our customers' continuous
support over the past two decades is the most heartfelt recognition
to us.
Speedy and Timely Delivery
Knowing that delivering goods to customers' hands on time is as
important as providing quality goods, we treat every business
transaction as a priority. Be it a raw material or a finished
material with machining or heat treatment, every effort will be
made to get your purchase order to you in the shortest lead time.
Quality Commitment
In order to realise competitive products to fulfil our customers'
demands and quality considerations, our integrated quality and work
management system is continuously being improved and developed
further. We document this for our customers by having our quality
management system certified in accordance with ISO 9001. This
measure is accompanied by audits and recertification's on a
regularly prescribed basis.
Our service
We provide quality special steel for all industries.
Orders of any size, any length, ship fast
We carry a unique inventory of specialty special steel
Provide related value-adding services :
metal cutting, sizing, machining (blanking, milling, grinding), and
heat treatment.
Sawing for small or large quantities, sawing-to-size.
Excellent customer service
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Guangzhou Changfeng Steel Co., LTD
Guangzhou ChangFeng Steel Co., Ltd. is a professional special steel company, which specialized in exporting mould steel products based in China.With twenty years experience in special steel industry, our main products are Plastic Mould Steel, Hot Work Mould Steel, Cold Work Mould Steel, Alloy Structural Steel, Tool Steel, Stainless Steel, Carbon Steel and Forged Block.
To ensure provide high quality products to customers, we have close cooperation with many Chinese first class special steel enterprises, including Baosteel Group, Dongbei Special Steel, Changcheng Special Steel, Hongsheng Heavy Industry, Xingcheng Special Steel, Daye Special Steel. We have thousand tons of stock materials in our own factory and also can provide processing services to customers. We are full of export experience for many years, the product covers America, Germany, France, Italy, Turkey, Singapore, Thailand, Malaysia, Vietnam, Taiwan, and Middle-East.
After years of development, the company has established a complete quality management and export service system. We have a group of experienced and competent elites and is capable of offering the best service to clients. 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. All the 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.
Our company keeps the principle of “sincerely cooperation, endless striving for perfection”. We desire to establish the long-term mutual beneficial and win-win relationship with clients all over the world.