Factory wholesale price for AISI 8620 Steel | 1.6523 | 21NiCrMo2 | SNCM220 Wholesale to Dominican Republic
AISI 8620 Steel is a low alloy nickel, chromium, molybdenum case hardening steel,generally supplied in the as rolled condition with a maximum hardness HB 255max. SAE steel 8620 offers high external strength and good internalstrength, making it highly wear resistant. AISI 8620 steel has a highercore strength than grades 8615 and 8617. SAE 8620 alloy steel isflexible during hardening treatments, thus enabling improvement ofcase/core properties. Pre hardened and tempered (uncarburized) 8620 ca...
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is a low alloy nickel, chromium, molybdenum case hardening steel,
generally supplied in the as rolled condition with a maximum hardness HB
255max. SAE steel 8620 offers high external strength and good internal
strength, making it highly wear resistant. AISI 8620 steel has a higher
core strength than grades 8615 and 8617.
SAE 8620 alloy steel is
flexible during hardening treatments, thus enabling improvement of
case/core properties. Pre hardened and tempered (uncarburized) 8620 can
be further surface hardened by nitriding but will not respond
satisfactorily to flame or induction hardening due to its low carbon
Steel 8620 is suited for applications which require a
combination of toughness and wear resistance. This grade is commonly
supplied in round bar.
1. AISI 8620 Steel Supply Range
8620 Round Bar: diameter 80mm – 1200mm
8620 Steel Plate: thickness 10mm – 1500mm x width 200mm – 3000mm
8620 Square Bar: 140mm – 460mm
8620 tubes are also available against your detailed request.
Surface Finish: Black, Rough Machined, Turned or as per given requirements.
2. SAE 8620 Steel Specification and Relevant Standards
3. ASTM 8620 Steels & Equilvalents Chemical Composition
4. AISI 8620 Steel Mechanical Properties
8620 Physical Properties:
Density (lb / cu. in.) 0.283
Specific Gravity 7.8
Specific Heat (Btu/lb/Deg F – [32-212 Deg F]) 0.1
Melting Point (Deg F) 2600
Thermal Conductivity 26
Mean Coeff Thermal Expansion 6.6
Modulus of Elasticity Tension 31
8620 Steel Mechanical Properties
|Tensile strength||530 MPa||76900 psi|
|Yield strength||385 MPa||55800 psi|
|Elastic modulus||190-210 GPa||27557-30458 ksi|
|Bulk modulus (typical for steel)||140 GPa||20300 ksi|
|Shear modulus (typical for steel)||80 GPa||11600 ksi|
|Izod Impact||115 J||84.8 ft.lb|
|Hardness, Knoop (converted from Brinell hardness)||169||169|
|Hardness, Rockwell B (converted from Brinell hardness)||80||80|
|Hardness, Vickers (converted from Brinell hardness)||155||155|
|Machinability (hot rolled and cold drawn, based on 100 machinability for AISI 1212 steel)||65||65|
5. Forging of Material 8620 Steel
8620 alloy steel is forged at a start temperature of around 2250ºF
(1230ºC) down to approximately 1700ºF(925ºC.) prior to the hardening
heat treatment or carburizing. The alloy is air cooled after forging.
6. ASTM 8620 Steel Heat Treatment
8620 steel may be given a full anneal by heat to 820℃ – 850℃, and hold
until temperature is uniform throughout the section and cool in furnace
or air cooled.
of heat treated and water quenched parts of 8620 steels (not
carburized) is done at 400 F to 1300 F to improve case toughness with
minimal effect on its hardness. This will also reduce the possibility of
AISI steel 8620 will be austenitized at around 840°C – 870°C, and oil
or water quenched depending upon section size and intricacy. Cool in Air
or Oil required.
(910ºC) and air cool. This is another method of improving machinability
in 8620 material; normalizing might also be used prior to case
7. Machinability of SAE 8620 Steel
8620 alloy steel is readily machined 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
8. Welding of 8620 Materials
alloy 8620 may be welded as rolled condition by conventional methods,
usually gas or arc welding. Preheating at 400 F is beneficial and
subsequent heating after welding is recommended – consult the approved
weld procedure for the method used. However, welding in the case
hardened or through hardened condition is not recommended
9. Application of ASTM 8620 Steel
8620 steel material is used extensively by all industry sectors for
light to medium stressed components and shafts requiring high surface
wear resistance with reasonable core strength and impact properties.
applications are: Arbors, Bearings, Bushings, Cam Shafts, Differential
Pinions, Guide Pins, King Pins, Pistons Pins, Gears, Splined Shafts,
Ratchets, Sleeves and other applications where it is helpful to have a
steel that can be readily machined and carburized to controlled case
NOTE: you most likely don’t need anti-seize unless you are in an area that has a lot of salt on the roads. Even then, if the threads are severely rusted they should be replaced. When in doubt, just clean them with a cloth or wire brush. Also, when this was originally uploaded in 2008 the audio sounded like I was shot with a tranquilizer dart – so I apologize in advance.
A wider stance will improve handling and make your vehicle look more aggressive. Here we show you one option to fill out those wheel wells: wheel spacers. Check out the before and after shots. Such a small change makes a huge difference!
I would think there are inherent guidelines for sports car design: such as your wheels should be flush with the sides of the fender or the hood should be longer than the trunk (unless it’s a mid-engine). These rules are subtle but they leave an impression without you even noticing it. It’s one way BMW gives its cars that sporty look without appearing to try too hard.
Now look at any Mustang with a stock wheel/tire setup and they just look top heavy from the rear. The fenders go past the wheels by an inch or two. That’s why this wheel spacer modification is a must-have on the Mustang and anyone running stock tires with a wide-body kit.
What You’ll Need
Hub-Centric Wheel Spacers: Some companies sell wheel spacers that slide onto your existing wheel studs and literally push your wheel out to the edges of the stud. This is a bad idea since you are stressing the lug studs and they can shear off. You’ll notice that the wheel spacers in this video bolt on to the existing lugs and then feature separate studs for the wheels. You can purchase these hub-centric style wheel spacers at a number of places including Late Model Restoration Supply.
Torque Wrench: You will need a torque wrench when tightening the wheel spacer lug nuts prior to reinstalling the wheel. I use the same torque specifications that I would use for the wheel’s lug nuts (usually 80 to 110 lb-ft depending on the make of your car).
Deep Socket (19mm for this car): A regular socket will bottom out when you go to install the wheel spacers.
Jack and Jack Stands: You want to use jacks and jack stands so check out that episode if you need to pick up the appropriate equipment!
This install was demonstrated on a late model Mustang but applies to all cars and trucks. Wheel spacers are also useful and practically necessary when employing a wide-body kit.
Notes and Warnings
Tire-to-Fender clearance can be a problem. Wheel spacers that put the tire too far outwards can make the tire rub against the fender which can lead to blow-outs or damage. Do your research before you buy! For 1994-2004 Mustang owners, you can fit up to 35mm spacers on stock tires (245/40 17) but not on the optional 255/40 17s.
Tips, Tricks and Other Resources
Since you will probably have to buy the special deep socket just for this install you may want to store it with your wheel lock key.
UNI MINI SUMO SMACKDOWN, Friday April 26, 2013
The North American Robotics Association is housed at the University of Northern Iowa in Cedar Falls, Iowa. Our main objective is the promotion of mini-sumo robotics in educational and club environments.
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