SAE8620 Alloy Steel 8620 Alloy Steel Data Sheet 8620 Steel
Properties Diameter 10 - 350mm
SAE8620H Alloy Round Bar SAE 8620 Alloy Steel Round Bar | UNS
G86200 Bar SAE8620H Alloy Solid Round Bar
SAE 8620 is one of alloy construture steel according to Chinese
Standard. Standard Code: A50202. The steel round bar is high
hardenability, without fragility after tempering,good
weldability.Nice machinability and Cold strain plasticity.
HR 8620 steel bar is a low carbon nickel chromium molybdenum alloy
with good carburized properties, formability, and weldability. This
grade is a low-cost steel that is the most widely used carburizing
alloy. Due to its nickel content, this grade has a high strength
case and core toughness. The chromium and molybdenum support
carburizing, and give good surface hardness and wear. MittelCompany
stocks many diameters of 8620 hot rolled steel to meet the markets
demand. We also supply 8620 steel bar to various industries like
aerospace, agriculture, ATV, construction, and motorcycle.
Features of SAE8620 Alloy Steel Round Bar
1. 1 Good machinability performance
2. 2. Good Cold strain plasticity
3. 3. Good weldability
4. 4. High hardenability
Similar Standards
Designation by Standards | Brand Name | Ravne No. | Mat. No. | DIN | EN | AISI | | 20NCD2 | 769 | 1.6523 | 21NiCrMo2 | 20NiCrMo2 | 8620 |
Chemical Composition (in weight %) | C | Si | Mn | Cr | Mo | Ni | V | W | Others | | 0.20 | max. 0.40 | 0.80 | 0.53 | 0.20 | 0.55 | - | - | - |
Description
20NCD2 is a hardenable chromium, molybdenum, nickel low alloy steel
often used for carburizing to develop a case-hardened part. This
case-hardening will result in good wear characteristics. Applications
Gears, shafts and other applications where a hard carborized case
and a tough core are desired. Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210
Density [g/cm3]: 7.86 Soft Annealing
Heat to 650-700oC, cool slowly. This will produce a maximum Brinell
hardness of 212. Heat Treatment | Treatment | Temperature | Cooling | | Case hardening | 880-980oC | Oil (water), hot bath 160-250oC | | Carburising | 880-980oC | Oil (water), hot bath 160-250oC | | Direct hardening | 880-980oC | Oil, hot bath 160-250oC | | Core refining | 860-900oC | Oil, hot bath 160-250oC | | Core refining | 780-820oC | Oil, hot bath 160-250oC | | Tempering | 150-200oC | Air |
Distance From Quenched End in mm | mm | 1.5 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 20 | 25 | 30 | 35 | 40 | | H max. | 49 | 48 | 45 | 42 | 36 | 33 | 31 | 30 | 27 | 25 | 24 | 24 | 23 | | H min. | 41 | 37 | 31 | 25 | 22 | 20 | - | - | - | - | - | - | - | | HH max. | 49 | 48 | 45 | 42 | 36 | 33 | 31 | 30 | 27 | 25 | 24 | 24 | 22 | | HH min. | 44 | 41 | 36 | 31 | 27 | 24 | 22 | 21 | - | - | - | - | - | | HL max. | 46 | 44 | 40 | 36 | 31 | 29 | 27 | 26 | 23 | 21 | 20 | 20 | - | | HL min. | 41 | 37 | 31 | 25 | 22 | 20 | - | - | - | - | - | - | - |
Forging
Hot forming temperature: 1150-850oC. Machinability
Machining is done prior to carburizing to within as close a
tolerance as possible. Finish machining, after heat treatment
and/or carburizing, should be at a minimum so as not to impair the
hardened case of the part. Machining may be done by conventional
means prior to heat treatment - after carburizing machining is
usually limited to grinding. Welding
The alloy may be welded by conventional methods, usually gas or arc
welding. Preheating at 200oC is beneficial and subsequent heating
after welding is recommended - consult the approved weld procedure
for the method used. Cold Working
The alloy may be cold worked in the annealed condition by
conventional methods. Cold working, as with machining, should be
done to as close a tolerance as possible before heat treatment or
carburizing. Forms manufactured: Please see the Dimensional Sales Program. Disclaimer
The information and data presented herein are typical or average
values and are not a guarantee of maximum or minimum values.
Applications specifically suggested for material described herein
are made solely for the purpose of illustration to enable the
reader to make his own evaluation and are not intended as
warranties, either express or implied, of fitness for these or
other puposes. There is no representation that the recipient of
this literature will receive updated editions as the become
available. |
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Chemical Composition
| Grades | C | Si | Mn | P | S | Cr | Mo | Cu | Ni |
| 20CrNiMo | 0.17-0.23 | 0.17-0.37 | 0.6-.95 | ≤0.035 | ≤0.035 | 0.4-.7 | 0.20~0.30 | ≤0.30 | / |
Mechanical Properties
| Queching Temperature(ºC):850;Cold Media:oil |
| Tempering(ºC):200;Cold Media:air |
| Tensile strength σb (MPa):≥980(100) |
| Yield strengthσs (MPa):≥785(80) |
| Elongationδ5 (%):≥9 |
| Reduction of area ψ (%):≥40 |
| Akv (J):≥47 |
General Applications
Widely used for stransmission system,motor of tractor and
middle-small auto. Alternative 12CrNi3 to make higher class
carburization and cyanide carburizing parts such as oil
drilling,claws and cone for mining.
It is commonly used for carburized gears, pinions, shafts,
bearings, piston rings, ring gears, crankshafts, etc.
Stock Size
| round bar | Diameter | 10-350mm |
Sizes and Conditions
Our steel materials are in different sizes and conditions specially
catered to our customers' needs. They come in round bars, flat
bars, plates and blocks.
The conditions of the materials vary from pre-hardened, hot
rolled,annealed, quenched and tempered to surface conditions such
as black, pre-machined,griding and polish.
Why choose us?
Quality Assurance from government owned steel mills
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.
